Merge branch '3.0' into feature/vnode

include/common/taosmsg.h

@@ -70,11 +70,9 @@ TAOS_DEFINE_MESSAGE_TYPE( TSDB_MSG_TYPE_DROP_DB, "drop-db" )
 TAOS_DEFINE_MESSAGE_TYPE( TSDB_MSG_TYPE_USE_DB, "use-db" )
 TAOS_DEFINE_MESSAGE_TYPE( TSDB_MSG_TYPE_ALTER_DB, "alter-db" )
 TAOS_DEFINE_MESSAGE_TYPE( TSDB_MSG_TYPE_SYNC_DB, "sync-db" )
-TAOS_DEFINE_MESSAGE_TYPE( TSDB_MSG_TYPE_CREATE_TOPIC, "create-topic" )
-TAOS_DEFINE_MESSAGE_TYPE( TSDB_MSG_TYPE_DROP_TOPIC, "drop-topic" )	  
-TAOS_DEFINE_MESSAGE_TYPE( TSDB_MSG_TYPE_ALTER_TOPIC, "alter-topic" )
+TAOS_DEFINE_MESSAGE_TYPE( TSDB_MSG_TYPE_COMPACT_DB, "compact-db" )
 TAOS_DEFINE_MESSAGE_TYPE( TSDB_MSG_TYPE_CREATE_FUNCTION, "create-function" )
-TAOS_DEFINE_MESSAGE_TYPE( TSDB_MSG_TYPE_ALTER_FUNCTION, "alter-function" )
+TAOS_DEFINE_MESSAGE_TYPE( TSDB_MSG_TYPE_RETRIEVE_FUNCTION, "retrieve-function" )
 TAOS_DEFINE_MESSAGE_TYPE( TSDB_MSG_TYPE_DROP_FUNCTION, "drop-function" )
 TAOS_DEFINE_MESSAGE_TYPE( TSDB_MSG_TYPE_CREATE_STABLE, "create-stable" )
 TAOS_DEFINE_MESSAGE_TYPE( TSDB_MSG_TYPE_ALTER_STABLE, "alter-stable" )
@@ -86,8 +84,6 @@ TAOS_DEFINE_MESSAGE_TYPE( TSDB_MSG_TYPE_KILL_CONN, "kill-conn" )
 TAOS_DEFINE_MESSAGE_TYPE( TSDB_MSG_TYPE_HEARTBEAT, "heartbeat" )
 TAOS_DEFINE_MESSAGE_TYPE( TSDB_MSG_TYPE_SHOW, "show" )
 TAOS_DEFINE_MESSAGE_TYPE( TSDB_MSG_TYPE_SHOW_RETRIEVE, "retrieve" )  
-TAOS_DEFINE_MESSAGE_TYPE( TSDB_MSG_TYPE_SHOW_RETRIEVE_FUNC, "retrieve-func" )
-TAOS_DEFINE_MESSAGE_TYPE( TSDB_MSG_TYPE_COMPACT_VNODE, "compact-vnode" )
 // message from client to qnode
 // message from client to dnode
 TAOS_DEFINE_MESSAGE_TYPE( TSDB_MSG_TYPE_NETWORK_TEST, "nettest" )
@@ -163,7 +159,7 @@ typedef enum _mgmt_table {
   TSDB_MGMT_TABLE_DNODE,
   TSDB_MGMT_TABLE_MNODE,
   TSDB_MGMT_TABLE_VGROUP,
-  TSDB_MGMT_TABLE_METRIC,
+  TSDB_MGMT_TABLE_STABLE,
   TSDB_MGMT_TABLE_MODULE,
   TSDB_MGMT_TABLE_QUERIES,
   TSDB_MGMT_TABLE_STREAMS,
@@ -276,14 +272,12 @@ typedef struct {
   SShellSubmitRspBlock failedBlocks[];
 } SShellSubmitRspMsg;
 
-//#if 0
 typedef struct SSchema {
-  uint8_t type;
-  char    name[TSDB_COL_NAME_LEN];
-  int16_t colId;
+  int8_t  type;
+  int32_t colId;
   int32_t bytes;
+  char    name[TSDB_COL_NAME_LEN];
 } SSchema;
-//#endif
 
 typedef struct {
   int32_t  contLen;
@@ -571,7 +565,6 @@ typedef struct {
   char    db[TSDB_FULL_DB_NAME_LEN];
   int32_t cacheBlockSize;  // MB
   int32_t totalBlocks;
-  int32_t maxTables;
   int32_t daysPerFile;
   int32_t daysToKeep0;
   int32_t daysToKeep1;
@@ -580,58 +573,93 @@ typedef struct {
   int32_t maxRowsPerFileBlock;
   int32_t commitTime;
   int32_t fsyncPeriod;
+  int8_t  walLevel;
   int8_t  precision;  // time resolution
   int8_t  compression;
-  int8_t  walLevel;
   int8_t  replications;
   int8_t  quorum;
-  int8_t  ignoreExist;
   int8_t  update;
   int8_t  cacheLastRow;
-  int8_t  dbType;
-  int16_t partitions;
-  int8_t  reserve[5];
-} SCreateDbMsg, SAlterDbMsg;
+  int8_t  ignoreExist;
+  int32_t reserve[8];
+} SCreateDbMsg;
+
+typedef struct {
+  char    db[TSDB_FULL_DB_NAME_LEN];
+  int32_t totalBlocks;
+  int32_t daysToKeep0;
+  int32_t daysToKeep1;
+  int32_t daysToKeep2;
+  int32_t fsyncPeriod;
+  int8_t  walLevel;
+  int8_t  quorum;
+  int8_t  cacheLastRow;
+  int32_t reserve[8];
+} SAlterDbMsg;
+
+typedef struct {
+  char    db[TSDB_TABLE_FNAME_LEN];
+  int8_t  ignoreNotExists;
+  int32_t reserve[8];
+} SDropDbMsg;
+
+typedef struct {
+  char    db[TSDB_TABLE_FNAME_LEN];
+  int8_t  ignoreNotExists;
+  int32_t reserve[8];
+} SUseDbMsg;
+
+typedef struct {
+  char    db[TSDB_TABLE_FNAME_LEN];
+  int32_t reserve[8];
+} SSyncDbMsg;
+
+typedef struct {
+  char    db[TSDB_TABLE_FNAME_LEN];
+  int32_t reserve[8];
+} SCompactDbMsg;
 
 typedef struct {
   char    name[TSDB_FUNC_NAME_LEN];
-  char    path[PATH_MAX];
-  int32_t funcType;
+  int8_t  funcType;
+  int8_t  scriptType;
+  int8_t  align;
   int8_t  outputType;
-  int16_t outputLen;
+  int32_t outputLen;
   int32_t bufSize;
-  int32_t codeLen;
-  char    code[];
+  int64_t sigature;
+  int32_t commentSize;
+  int32_t codeSize;
+  char    pCont[];
 } SCreateFuncMsg;
 
 typedef struct {
-  int32_t num;
-  char    name[];
+  char name[TSDB_FUNC_NAME_LEN];
+} SDropFuncMsg;
+
+typedef struct {
+  int32_t numOfFuncs;
+  char    pFuncNames[];
 } SRetrieveFuncMsg;
 
 typedef struct {
   char    name[TSDB_FUNC_NAME_LEN];
-  int32_t funcType;
-  int8_t  resType;
-  int16_t resBytes;
+  int8_t  funcType;
+  int8_t  scriptType;
+  int8_t  align;
+  int8_t  outputType;
+  int32_t outputLen;
   int32_t bufSize;
-  int32_t len;
-  char    content[];
-} SFunctionInfoMsg;
-
-typedef struct {
-  int32_t num;
-  char    content[];
-} SUdfFuncMsg;
+  int64_t sigature;
+  int32_t commentSize;
+  int32_t codeSize;
+  char    pCont[];
+} SFuncInfo;
 
 typedef struct {
-  char     name[TSDB_FUNC_NAME_LEN];
-} SDropFuncMsg;
-
-typedef struct {
-  char   db[TSDB_TABLE_FNAME_LEN];
-  int8_t ignoreNotExists;
-} SDropDbMsg, SUseDbMsg, SSyncDbMsg;
+  int32_t numOfFuncs;
+  char    pFuncInfos[];
+} SRetrieveFuncRsp;
 
 typedef struct {
   int32_t statusInterval;
@@ -736,13 +764,17 @@ typedef struct {
 } SAuthVnodeMsg;
 
 typedef struct {
-  char    tableFname[TSDB_TABLE_FNAME_LEN];
-  int16_t createFlag;
-  char    tags[];
+  char name[TSDB_TABLE_FNAME_LEN];
+} SStableInfoMsg;
+
+typedef struct {
+  char   tableFname[TSDB_TABLE_FNAME_LEN];
+  int8_t createFlag;
+  char   tags[];
 } STableInfoMsg;
 
 typedef struct {
-  uint8_t metaClone;     // create local clone of the cached table meta
+  int8_t  metaClone;  // create local clone of the cached table meta
   int32_t numOfVgroups;
   int32_t numOfTables;
   int32_t numOfUdfs;
@@ -760,25 +792,24 @@ typedef struct {
 } SVgroupMsg;
 
 typedef struct {
-  int32_t numOfVgroups;
+  int32_t    numOfVgroups;
   SVgroupMsg vgroups[];
 } SVgroupsMsg, SVgroupsInfo;
 
-typedef struct STableMetaMsg {
-  int32_t    contLen;
+typedef struct {
   char       tableFname[TSDB_TABLE_FNAME_LEN];  // table id
-  int8_t     numOfTags;
+  char       stableFname[TSDB_TABLE_FNAME_LEN];
+  int32_t    numOfTags;
+  int32_t    numOfColumns;
   int8_t     precision;
   int8_t     tableType;
-  int16_t    numOfColumns;
-  int16_t    sversion;
-  int16_t    tversion;
-  int32_t    tid;
-  int64_t    uid;
+  int8_t     update;
+  int32_t    sversion;
+  int32_t    tversion;
+  uint64_t   tuid;
+  uint64_t   suid;
   SVgroupMsg vgroup;
-  char       sTableName[TSDB_TABLE_FNAME_LEN];
-  int64_t    suid;
-  SSchema    schema[];
+  SSchema    pSchema[];
 } STableMetaMsg;
 
 typedef struct SMultiTableMeta {
@@ -823,14 +854,31 @@ typedef struct SShowRsp {
 
 typedef struct {
   char ep[TSDB_EP_LEN];  // end point, hostname:port
-} SCreateDnodeMsg, SDropDnodeMsg;
+} SCreateDnodeMsg;
+
+typedef struct {
+  int32_t dnodeId;
+} SDropDnodeMsg;
+
+typedef struct {
+  int32_t dnodeId;
+  char    config[128];
+} SCfgDnodeMsg;
+
+typedef struct {
+  int32_t dnodeId;
+} SCreateMnodeMsg, SDropMnodeMsg;
 
 typedef struct {
   int32_t  dnodeId;
+  int8_t   align[3];
   int8_t   replica;
-  int8_t   reserved[3];
   SReplica replicas[TSDB_MAX_REPLICA];
-} SCreateMnodeMsg, SAlterMnodeMsg, SDropMnodeMsg;
+} SCreateMnodeInMsg, SAlterMnodeInMsg;
+
+typedef struct {
+  int32_t dnodeId;
+} SDropMnodeInMsg;
 
 typedef struct {
   int32_t dnodeId;
@@ -843,11 +891,6 @@ typedef struct {
   int32_t vgId;
 } SConfigVnodeMsg;
 
-typedef struct {
-  char ep[TSDB_EP_LEN];  // end point, hostname:port
-  char config[64];
-} SCfgDnodeMsg;
-
 typedef struct {
   char    sql[TSDB_SHOW_SQL_LEN];
   int32_t queryId;

include/common/tglobal.h

@@ -196,7 +196,6 @@ extern SDiskCfg tsDiskCfg[];
 void    taosInitGlobalCfg();
 int32_t taosCheckGlobalCfg();
 int32_t taosCfgDynamicOptions(char *msg);
-int     taosGetFqdnPortFromEp(const char *ep, char *fqdn, uint16_t *port);
 bool    taosCheckBalanceCfgOptions(const char *option, int32_t *vnodeId, int32_t *dnodeId);
 void    taosAddDataDir(int index, char *v1, int level, int primary);
 void    taosReadDataDirCfg(char *v1, char *v2, char *v3);

include/dnode/mnode/sdb/sdb.h

@@ -65,6 +65,16 @@ extern "C" {
     dataPos += valLen;                                      \
   }
 
+#define SDB_GET_RESERVE(pRaw, pRow, dataPos, valLen)        \
+  {                                                         \
+    char val[valLen] = {0};                                 \
+    if (sdbGetRawBinary(pRaw, dataPos, val, valLen) != 0) { \
+      sdbFreeRow(pRow);                                     \
+      return NULL;                                          \
+    }                                                       \
+    dataPos += valLen;                                      \
+  }
+
 #define SDB_SET_INT64(pRaw, dataPos, val)          \
   {                                                \
     if (sdbSetRawInt64(pRaw, dataPos, val) != 0) { \
@@ -110,6 +120,16 @@ extern "C" {
     dataPos += valLen;                                      \
   }
 
+#define SDB_SET_RESERVE(pRaw, dataPos, valLen)              \
+  {                                                         \
+    char val[valLen] = {0};                                 \
+    if (sdbSetRawBinary(pRaw, dataPos, val, valLen) != 0) { \
+      sdbFreeRaw(pRaw);                                     \
+      return NULL;                                          \
+    }                                                       \
+    dataPos += valLen;                                      \
+  }
+
 #define SDB_SET_DATALEN(pRaw, dataLen)          \
   {                                             \
     if (sdbSetRawDataLen(pRaw, dataLen) != 0) { \
@@ -258,7 +278,7 @@ int32_t sdbDeploy(SSdb *pSdb);
 int32_t sdbReadFile(SSdb *pSdb);
 
 /**
- * @brief Parse and write raw data to sdb.
+ * @brief Parse and write raw data to sdb, then free the pRaw object
  *
  * @param pSdb The sdb object.
  * @param pRaw The raw data.
@@ -266,6 +286,15 @@ int32_t sdbReadFile(SSdb *pSdb);
  */
 int32_t sdbWrite(SSdb *pSdb, SSdbRaw *pRaw);
 
+/**
+ * @brief Parse and write raw data to sdb.
+ *
+ * @param pSdb The sdb object.
+ * @param pRaw The raw data.
+ * @return int32_t 0 for success, -1 for failure.
+ */
+int32_t sdbWriteNotFree(SSdb *pSdb, SSdbRaw *pRaw);
+
 /**
  * @brief Acquire a row from sdb
  *

include/util/taoserror.h

@@ -183,6 +183,7 @@ int32_t* taosGetErrno();
 #define TSDB_CODE_MND_MNODE_ALREADY_EXIST       TAOS_DEF_ERROR_CODE(0, 0x0348)  //"Mnode already exists")
 #define TSDB_CODE_MND_MNODE_NOT_EXIST           TAOS_DEF_ERROR_CODE(0, 0x0349)  //"Mnode not there")
 
+// mnode-table
 #define TSDB_CODE_MND_TABLE_ALREADY_EXIST       TAOS_DEF_ERROR_CODE(0, 0x0360)  //"Table already exists")
 #define TSDB_CODE_MND_INVALID_TABLE_ID          TAOS_DEF_ERROR_CODE(0, 0x0361)  //"Table name too long")
 #define TSDB_CODE_MND_INVALID_TABLE_NAME        TAOS_DEF_ERROR_CODE(0, 0x0362)  //"Table does not exist")
@@ -200,32 +201,41 @@ int32_t* taosGetErrno();
 #define TSDB_CODE_MND_INVALID_CREATE_TABLE_MSG  TAOS_DEF_ERROR_CODE(0, 0x036E)  //"Invalid create table message")
 #define TSDB_CODE_MND_EXCEED_MAX_ROW_BYTES      TAOS_DEF_ERROR_CODE(0, 0x036F)  //"Exceed max row bytes")
 
-#define TSDB_CODE_MND_INVALID_FUNC_NAME         TAOS_DEF_ERROR_CODE(0, 0x0370)  //"Invalid func name")
-#define TSDB_CODE_MND_INVALID_FUNC_LEN          TAOS_DEF_ERROR_CODE(0, 0x0371)  //"Invalid func length")
-#define TSDB_CODE_MND_INVALID_FUNC_CODE         TAOS_DEF_ERROR_CODE(0, 0x0372)  //"Invalid func code")
-#define TSDB_CODE_MND_FUNC_ALREADY_EXIST        TAOS_DEF_ERROR_CODE(0, 0x0373)  //"Func already exists")
-#define TSDB_CODE_MND_INVALID_FUNC              TAOS_DEF_ERROR_CODE(0, 0x0374)  //"Invalid func")
-#define TSDB_CODE_MND_INVALID_FUNC_BUFSIZE      TAOS_DEF_ERROR_CODE(0, 0x0375)  //"Invalid func bufSize")
+#define TSDB_CODE_MND_FUNC_ALREADY_EXIST        TAOS_DEF_ERROR_CODE(0, 0x0370)
+#define TSDB_CODE_MND_FUNC_NOT_EXIST            TAOS_DEF_ERROR_CODE(0, 0x0371)
+#define TSDB_CODE_MND_INVALID_FUNC              TAOS_DEF_ERROR_CODE(0, 0x0372)
+#define TSDB_CODE_MND_INVALID_FUNC_NAME         TAOS_DEF_ERROR_CODE(0, 0x0373)
+#define TSDB_CODE_MND_INVALID_FUNC_COMMENT      TAOS_DEF_ERROR_CODE(0, 0x0374)
+#define TSDB_CODE_MND_INVALID_FUNC_CODE         TAOS_DEF_ERROR_CODE(0, 0x0375)
+#define TSDB_CODE_MND_INVALID_FUNC_BUFSIZE      TAOS_DEF_ERROR_CODE(0, 0x0376)
 
 #define TSDB_CODE_MND_INVALID_TAG_LENGTH        TAOS_DEF_ERROR_CODE(0, 0x0376)  //"invalid tag length")
 #define TSDB_CODE_MND_INVALID_COLUMN_LENGTH     TAOS_DEF_ERROR_CODE(0, 0x0377)   //"invalid column length")
 
-#define TSDB_CODE_MND_DB_NOT_SELECTED           TAOS_DEF_ERROR_CODE(0, 0x0380)  //"Database not specified or available")
-#define TSDB_CODE_MND_DB_ALREADY_EXIST          TAOS_DEF_ERROR_CODE(0, 0x0381)  //"Database already exists")
-#define TSDB_CODE_MND_INVALID_DB_OPTION         TAOS_DEF_ERROR_CODE(0, 0x0382)  //"Invalid database options")
-#define TSDB_CODE_MND_INVALID_DB                TAOS_DEF_ERROR_CODE(0, 0x0383)  //"Invalid database name")
-#define TSDB_CODE_MND_MONITOR_DB_FORBIDDEN      TAOS_DEF_ERROR_CODE(0, 0x0384)  //"Cannot delete monitor database")
+#define TSDB_CODE_MND_DB_NOT_SELECTED           TAOS_DEF_ERROR_CODE(0, 0x0380)
+#define TSDB_CODE_MND_DB_NOT_EXIST              TAOS_DEF_ERROR_CODE(0, 0x0381) 
+#define TSDB_CODE_MND_DB_ALREADY_EXIST          TAOS_DEF_ERROR_CODE(0, 0x0381)
+#define TSDB_CODE_MND_INVALID_DB                TAOS_DEF_ERROR_CODE(0, 0x0383)
+#define TSDB_CODE_MND_INVALID_DB_OPTION         TAOS_DEF_ERROR_CODE(0, 0x0382)
+#define TSDB_CODE_MND_INVALID_DB_CACHE_SIZE     TAOS_DEF_ERROR_CODE(0, 0x0383)
+#define TSDB_CODE_MND_INVALID_DB_TOTAL_BLOCKS   TAOS_DEF_ERROR_CODE(0, 0x0383)
+#define TSDB_CODE_MND_INVALID_DB_DAYS           TAOS_DEF_ERROR_CODE(0, 0x0383)
+#define TSDB_CODE_MND_INVALID_DB_KEEP0          TAOS_DEF_ERROR_CODE(0, 0x0383)
+#define TSDB_CODE_MND_INVALID_DB_KEEP1          TAOS_DEF_ERROR_CODE(0, 0x0383)
+#define TSDB_CODE_MND_INVALID_DB_KEEP2          TAOS_DEF_ERROR_CODE(0, 0x0383)
+#define TSDB_CODE_MND_INVALID_DB_MIN_ROWS       TAOS_DEF_ERROR_CODE(0, 0x0383)
+#define TSDB_CODE_MND_INVALID_DB_MAX_ROWS       TAOS_DEF_ERROR_CODE(0, 0x0383)
+#define TSDB_CODE_MND_INVALID_DB_COMMIT_TIME    TAOS_DEF_ERROR_CODE(0, 0x0383)
+#define TSDB_CODE_MND_INVALID_DB_FSYNC_PERIOD   TAOS_DEF_ERROR_CODE(0, 0x0383)
+#define TSDB_CODE_MND_INVALID_DB_WAL_LEVEL      TAOS_DEF_ERROR_CODE(0, 0x0383)
+#define TSDB_CODE_MND_INVALID_DB_PRECISION      TAOS_DEF_ERROR_CODE(0, 0x0383)
+#define TSDB_CODE_MND_INVALID_DB_COMP           TAOS_DEF_ERROR_CODE(0, 0x0383)
+#define TSDB_CODE_MND_INVALID_DB_REPLICA        TAOS_DEF_ERROR_CODE(0, 0x0383)
+#define TSDB_CODE_MND_INVALID_DB_QUORUM         TAOS_DEF_ERROR_CODE(0, 0x0383)
+#define TSDB_CODE_MND_INVALID_DB_UPDATE         TAOS_DEF_ERROR_CODE(0, 0x0383)
+#define TSDB_CODE_MND_INVALID_DB_CACHE_LAST     TAOS_DEF_ERROR_CODE(0, 0x0383)
+#define TSDB_CODE_MND_DB_OPTION_UNCHANGED       TAOS_DEF_ERROR_CODE(0, 0x0383)
 #define TSDB_CODE_MND_TOO_MANY_DATABASES        TAOS_DEF_ERROR_CODE(0, 0x0385)  //"Too many databases for account")
-#define TSDB_CODE_MND_DB_IN_DROPPING            TAOS_DEF_ERROR_CODE(0, 0x0386)  //"Database not available")
-#define TSDB_CODE_MND_VGROUP_NOT_READY          TAOS_DEF_ERROR_CODE(0, 0x0387)  //"Database unsynced")
-
-#define TSDB_CODE_MND_INVALID_DB_OPTION_DAYS    TAOS_DEF_ERROR_CODE(0, 0x0390)  //"Invalid database option: days out of range")
-#define TSDB_CODE_MND_INVALID_DB_OPTION_KEEP    TAOS_DEF_ERROR_CODE(0, 0x0391)  //"Invalid database option: keep >= keep1 >= keep0 >= days")
-
-#define TSDB_CODE_MND_INVALID_TOPIC             TAOS_DEF_ERROR_CODE(0, 0x0392)  //"Invalid topic name)
-#define TSDB_CODE_MND_INVALID_TOPIC_OPTION      TAOS_DEF_ERROR_CODE(0, 0x0393)  //"Invalid topic option)
-#define TSDB_CODE_MND_INVALID_TOPIC_PARTITONS   TAOS_DEF_ERROR_CODE(0, 0x0394)  //"Invalid topic partitons num, valid range: [1, 1000])
-#define TSDB_CODE_MND_TOPIC_ALREADY_EXIST       TAOS_DEF_ERROR_CODE(0, 0x0395)  //"Topic already exists)
 
 // dnode
 #define TSDB_CODE_DND_ACTION_IN_PROGRESS        TAOS_DEF_ERROR_CODE(0, 0x0400)

include/util/tdef.h

@@ -163,9 +163,14 @@ do { \
 #define TSDB_TABLE_NAME_LEN       193     // it is a null-terminated string
 #define TSDB_DB_NAME_LEN          33
 #define TSDB_FULL_DB_NAME_LEN     (TSDB_ACCT_ID_LEN + TSDB_DB_NAME_LEN)
-#define TSDB_FUNC_NAME_LEN        65
-#define TSDB_FUNC_CODE_LEN        (65535 - 512)
-#define TSDB_FUNC_BUF_SIZE        512
+
+#define TSDB_FUNC_NAME_LEN         65
+#define TSDB_FUNC_COMMENT_LEN      4096
+#define TSDB_FUNC_CODE_LEN         (65535 - 512)
+#define TSDB_FUNC_BUF_SIZE         512
+#define TSDB_FUNC_TYPE_SCALAR      1
+#define TSDB_FUNC_TYPE_AGGREGATE   2
+
 #define TSDB_TYPE_STR_MAX_LEN     32
 #define TSDB_TABLE_FNAME_LEN      (TSDB_FULL_DB_NAME_LEN + TSDB_TABLE_NAME_LEN)
 #define TSDB_COL_NAME_LEN         65
@@ -245,12 +250,6 @@ do { \
 #define TSDB_MAX_TOTAL_BLOCKS           10000
 #define TSDB_DEFAULT_TOTAL_BLOCKS       6
 
-#define TSDB_MIN_TABLES                 4
-#define TSDB_MAX_TABLES                 10000000
-#define TSDB_DEFAULT_TABLES             1000000
-#define TSDB_TABLES_STEP                1000
-#define TSDB_META_COMPACT_RATIO         0       // disable tsdb meta compact by default
-
 #define TSDB_MIN_DAYS_PER_FILE          1
 #define TSDB_MAX_DAYS_PER_FILE          3650 
 #define TSDB_DEFAULT_DAYS_PER_FILE      10
@@ -259,18 +258,26 @@ do { \
 #define TSDB_MAX_KEEP                   365000   // data in db to be reserved.
 #define TSDB_DEFAULT_KEEP               3650     // ten years
 
-#define TSDB_DEFAULT_MIN_ROW_FBLOCK     100
 #define TSDB_MIN_MIN_ROW_FBLOCK         10
 #define TSDB_MAX_MIN_ROW_FBLOCK         1000
+#define TSDB_DEFAULT_MIN_ROW_FBLOCK     100
 
-#define TSDB_DEFAULT_MAX_ROW_FBLOCK     4096
 #define TSDB_MIN_MAX_ROW_FBLOCK         200
 #define TSDB_MAX_MAX_ROW_FBLOCK         10000
+#define TSDB_DEFAULT_MAX_ROW_FBLOCK     4096
 
 #define TSDB_MIN_COMMIT_TIME            30
 #define TSDB_MAX_COMMIT_TIME            40960
 #define TSDB_DEFAULT_COMMIT_TIME        3600
 
+#define TSDB_MIN_FSYNC_PERIOD           0
+#define TSDB_MAX_FSYNC_PERIOD           180000   // millisecond
+#define TSDB_DEFAULT_FSYNC_PERIOD       3000     // three second
+
+#define TSDB_MIN_WAL_LEVEL              0
+#define TSDB_MAX_WAL_LEVEL              2
+#define TSDB_DEFAULT_WAL_LEVEL          1
+
 #define TSDB_MIN_PRECISION              TSDB_TIME_PRECISION_MILLI
 #define TSDB_MAX_PRECISION              TSDB_TIME_PRECISION_NANO
 #define TSDB_DEFAULT_PRECISION          TSDB_TIME_PRECISION_MILLI
@@ -279,9 +286,13 @@ do { \
 #define TSDB_MAX_COMP_LEVEL             2
 #define TSDB_DEFAULT_COMP_LEVEL         2
 
-#define TSDB_MIN_WAL_LEVEL              0
-#define TSDB_MAX_WAL_LEVEL              2
-#define TSDB_DEFAULT_WAL_LEVEL          1
+#define TSDB_MIN_DB_REPLICA_OPTION      1
+#define TSDB_MAX_DB_REPLICA_OPTION      3
+#define TSDB_DEFAULT_DB_REPLICA_OPTION  1
+
+#define TSDB_MIN_DB_QUORUM_OPTION       1
+#define TSDB_MAX_DB_QUORUM_OPTION       2
+#define TSDB_DEFAULT_DB_QUORUM_OPTION   1
 
 #define TSDB_MIN_DB_UPDATE              0
 #define TSDB_MAX_DB_UPDATE              2
@@ -291,22 +302,6 @@ do { \
 #define TSDB_MAX_DB_CACHE_LAST_ROW      3
 #define TSDB_DEFAULT_CACHE_LAST_ROW     0
 
-#define TSDB_MIN_FSYNC_PERIOD           0
-#define TSDB_MAX_FSYNC_PERIOD           180000   // millisecond
-#define TSDB_DEFAULT_FSYNC_PERIOD       3000     // three second
-
-#define TSDB_MIN_DB_REPLICA_OPTION      1
-#define TSDB_MAX_DB_REPLICA_OPTION      3
-#define TSDB_DEFAULT_DB_REPLICA_OPTION  1
-
-#define TSDB_MIN_DB_PARTITON_OPTION     0
-#define TSDB_MAX_DB_PARTITON_OPTION     1000
-#define TSDB_DEFAULT_DB_PARTITON_OPTION 4
-
-#define TSDB_MIN_DB_QUORUM_OPTION       1
-#define TSDB_MAX_DB_QUORUM_OPTION       2
-#define TSDB_DEFAULT_DB_QUORUM_OPTION   1
-
 #define TSDB_MAX_JOIN_TABLE_NUM         10
 #define TSDB_MAX_UNION_CLAUSE           5
 
@@ -320,6 +315,11 @@ do { \
 #define TSDB_QUERY_TYPE_NON_TYPE               0x00u     // none type
 #define TSDB_QUERY_TYPE_FREE_RESOURCE          0x01u     // free qhandle at vnode
 
+
+#define TSDB_META_COMPACT_RATIO         0       // disable tsdb meta compact by default
+
+
+
 /*
  * 1. ordinary sub query for select * from super_table
  * 2. all sqlobj generated by createSubqueryObj with this flag

include/util/tutil.h

@@ -21,22 +21,22 @@ extern "C" {
 #endif
 
 #include "os.h"
-#include "tmd5.h"
 #include "tcrc32c.h"
 #include "tdef.h"
+#include "tmd5.h"
 
 int32_t strdequote(char *src);
-int32_t strndequote(char *dst, const char* z, int32_t len);
+int32_t strndequote(char *dst, const char *z, int32_t len);
 int32_t strRmquote(char *z, int32_t len);
 size_t  strtrim(char *src);
-char *  strnchr(char *haystack, char needle, int32_t len, bool skipquote);
-char ** strsplit(char *src, const char *delim, int32_t *num);
-char *  strtolower(char *dst, const char *src);
-char *  strntolower(char *dst, const char *src, int32_t n);
-char *  strntolower_s(char *dst, const char *src, int32_t n);
+char   *strnchr(char *haystack, char needle, int32_t len, bool skipquote);
+char  **strsplit(char *src, const char *delim, int32_t *num);
+char   *strtolower(char *dst, const char *src);
+char   *strntolower(char *dst, const char *src, int32_t n);
+char   *strntolower_s(char *dst, const char *src, int32_t n);
 int64_t strnatoi(char *num, int32_t len);
-char *  strbetween(char *string, char *begin, char *end);
-char *  paGetToken(char *src, char **token, int32_t *tokenLen);
+char   *strbetween(char *string, char *begin, char *end);
+char   *paGetToken(char *src, char **token, int32_t *tokenLen);
 
 int32_t taosByteArrayToHexStr(char bytes[], int32_t len, char hexstr[]);
 int32_t taosHexStrToByteArray(char hexstr[], char bytes[]);
@@ -45,6 +45,7 @@ char    *taosIpStr(uint32_t ipInt);
 uint32_t ip2uint(const char *const ip_addr);
 void     taosIp2String(uint32_t ip, char *str);
 void     taosIpPort2String(uint32_t ip, uint16_t port, char *str);
+int32_t  taosGetFqdnPortFromEp(const char *ep, char *fqdn, uint16_t *port);
 
 static FORCE_INLINE void taosEncryptPass(uint8_t *inBuf, size_t inLen, char *target) {
   T_MD5_CTX context;
@@ -58,4 +59,4 @@ static FORCE_INLINE void taosEncryptPass(uint8_t *inBuf, size_t inLen, char *tar
 }
 #endif
 
-#endif  /*_TD_UTIL_UTIL_H*/
+#endif /*_TD_UTIL_UTIL_H*/

source/common/src/tglobal.c

@@ -142,13 +142,9 @@ int8_t  tsWAL           = TSDB_DEFAULT_WAL_LEVEL;
 int32_t tsFsyncPeriod   = TSDB_DEFAULT_FSYNC_PERIOD;
 int32_t tsReplications  = TSDB_DEFAULT_DB_REPLICA_OPTION;
 int32_t tsQuorum        = TSDB_DEFAULT_DB_QUORUM_OPTION;
-int16_t tsPartitons     = TSDB_DEFAULT_DB_PARTITON_OPTION;
 int8_t  tsUpdate        = TSDB_DEFAULT_DB_UPDATE_OPTION;
 int8_t  tsCacheLastRow  = TSDB_DEFAULT_CACHE_LAST_ROW;
 int32_t tsMaxVgroupsPerDb  = 0;
-int32_t tsMinTablePerVnode = TSDB_TABLES_STEP;
-int32_t tsMaxTablePerVnode = TSDB_DEFAULT_TABLES;
-int32_t tsTableIncStepPerVnode = TSDB_TABLES_STEP;
 int32_t tsTsdbMetaCompactRatio = TSDB_META_COMPACT_RATIO;
 
 // tsdb config 
@@ -736,37 +732,6 @@ static void doInitGlobalConfig(void) {
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
   taosInitConfigOption(cfg);
 
-  // database configs
-  cfg.option = "maxTablesPerVnode";
-  cfg.ptr = &tsMaxTablePerVnode;
-  cfg.valType = TAOS_CFG_VTYPE_INT32;
-  cfg.cfgType = TSDB_CFG_CTYPE_B_CONFIG | TSDB_CFG_CTYPE_B_SHOW;
-  cfg.minValue = TSDB_MIN_TABLES;
-  cfg.maxValue = TSDB_MAX_TABLES;
-  cfg.ptrLength = 0;
-  cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
-
-  cfg.option = "minTablesPerVnode";
-  cfg.ptr = &tsMinTablePerVnode;
-  cfg.valType = TAOS_CFG_VTYPE_INT32;
-  cfg.cfgType = TSDB_CFG_CTYPE_B_CONFIG | TSDB_CFG_CTYPE_B_SHOW;
-  cfg.minValue = TSDB_MIN_TABLES;
-  cfg.maxValue = TSDB_MAX_TABLES;
-  cfg.ptrLength = 0;
-  cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
-
-  cfg.option = "tableIncStepPerVnode";
-  cfg.ptr = &tsTableIncStepPerVnode;
-  cfg.valType = TAOS_CFG_VTYPE_INT32;
-  cfg.cfgType = TSDB_CFG_CTYPE_B_CONFIG | TSDB_CFG_CTYPE_B_SHOW;
-  cfg.minValue = TSDB_MIN_TABLES;
-  cfg.maxValue = TSDB_MAX_TABLES;
-  cfg.ptrLength = 0;
-  cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
-
   cfg.option = "cache";
   cfg.ptr = &tsCacheBlockSize;
   cfg.valType = TAOS_CFG_VTYPE_INT32;
@@ -877,16 +842,6 @@ static void doInitGlobalConfig(void) {
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
   taosInitConfigOption(cfg);
 
-  cfg.option = "partitions";
-  cfg.ptr = &tsPartitons;
-  cfg.valType = TAOS_CFG_VTYPE_INT16;
-  cfg.cfgType = TSDB_CFG_CTYPE_B_CONFIG | TSDB_CFG_CTYPE_B_SHOW;
-  cfg.minValue = TSDB_MIN_DB_PARTITON_OPTION;
-  cfg.maxValue = TSDB_MAX_DB_PARTITON_OPTION;
-  cfg.ptrLength = 0;
-  cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
-
   cfg.option = "quorum";
   cfg.ptr = &tsQuorum;
   cfg.valType = TAOS_CFG_VTYPE_INT32;
@@ -1704,12 +1659,6 @@ int32_t taosCheckGlobalCfg() {
     }
   }
 
-  if (tsMaxTablePerVnode < tsMinTablePerVnode) {
-    uError("maxTablesPerVnode(%d) < minTablesPerVnode(%d), reset to minTablesPerVnode(%d)",
-	   tsMaxTablePerVnode, tsMinTablePerVnode, tsMinTablePerVnode);
-    tsMaxTablePerVnode = tsMinTablePerVnode;
-  }
-
   // todo refactor
   tsVersion = 0;
   for (int ver = 0, i = 0; i < TSDB_VERSION_LEN; ++i) {
@@ -1738,24 +1687,6 @@ int32_t taosCheckGlobalCfg() {
   return 0;
 }
 
-int taosGetFqdnPortFromEp(const char *ep, char *fqdn, uint16_t *port) {
-  *port = 0;
-  strcpy(fqdn, ep);
-
-  char *temp = strchr(fqdn, ':');
-  if (temp) {   
-    *temp = 0;
-    *port = atoi(temp+1);
-  } 
-  
-  if (*port == 0) {
-    *port = tsServerPort;
-    return -1;
-  }
-
-  return 0; 
-}
-
 /*
  * alter dnode 1 balance "vnode:1-dnode:2"
  */

source/dnode/mgmt/impl/src/dndMnode.c

@@ -366,7 +366,7 @@ static void dndBuildMnodeOpenOption(SDnode *pDnode, SMnodeOpt *pOption) {
   memcpy(&pOption->replicas, pMgmt->replicas, sizeof(SReplica) * TSDB_MAX_REPLICA);
 }
 
-static int32_t dndBuildMnodeOptionFromMsg(SDnode *pDnode, SMnodeOpt *pOption, SCreateMnodeMsg *pMsg) {
+static int32_t dndBuildMnodeOptionFromMsg(SDnode *pDnode, SMnodeOpt *pOption, SCreateMnodeInMsg *pMsg) {
   dndInitMnodeOption(pDnode, pOption);
   pOption->dnodeId = dndGetDnodeId(pDnode);
   pOption->clusterId = dndGetClusterId(pDnode);
@@ -488,8 +488,8 @@ static int32_t dndDropMnode(SDnode *pDnode) {
   return 0;
 }
 
-static SCreateMnodeMsg *dndParseCreateMnodeMsg(SRpcMsg *pRpcMsg) {
-  SCreateMnodeMsg *pMsg = pRpcMsg->pCont;
+static SCreateMnodeInMsg *dndParseCreateMnodeMsg(SRpcMsg *pRpcMsg) {
+  SCreateMnodeInMsg *pMsg = pRpcMsg->pCont;
   pMsg->dnodeId = htonl(pMsg->dnodeId);
   for (int32_t i = 0; i < pMsg->replica; ++i) {
     pMsg->replicas[i].id = htonl(pMsg->replicas[i].id);
@@ -500,7 +500,7 @@ static SCreateMnodeMsg *dndParseCreateMnodeMsg(SRpcMsg *pRpcMsg) {
 }
 
 static int32_t dndProcessCreateMnodeReq(SDnode *pDnode, SRpcMsg *pRpcMsg) {
-  SCreateMnodeMsg *pMsg = dndParseCreateMnodeMsg(pRpcMsg->pCont);
+  SCreateMnodeInMsg *pMsg = dndParseCreateMnodeMsg(pRpcMsg->pCont);
 
   if (pMsg->dnodeId != dndGetDnodeId(pDnode)) {
     terrno = TSDB_CODE_DND_MNODE_ID_INVALID;
@@ -516,7 +516,7 @@ static int32_t dndProcessCreateMnodeReq(SDnode *pDnode, SRpcMsg *pRpcMsg) {
 }
 
 static int32_t dndProcessAlterMnodeReq(SDnode *pDnode, SRpcMsg *pRpcMsg) {
-  SAlterMnodeMsg *pMsg = dndParseCreateMnodeMsg(pRpcMsg->pCont);
+  SAlterMnodeInMsg *pMsg = dndParseCreateMnodeMsg(pRpcMsg->pCont);
 
   if (pMsg->dnodeId != dndGetDnodeId(pDnode)) {
     terrno = TSDB_CODE_DND_MNODE_ID_INVALID;
@@ -531,7 +531,8 @@ static int32_t dndProcessAlterMnodeReq(SDnode *pDnode, SRpcMsg *pRpcMsg) {
 }
 
 static int32_t dndProcessDropMnodeReq(SDnode *pDnode, SRpcMsg *pRpcMsg) {
-  SDropMnodeMsg *pMsg = dndParseCreateMnodeMsg(pRpcMsg->pCont);
+  SDropMnodeInMsg *pMsg = pRpcMsg->pCont;
+  pMsg->dnodeId = htonl(pMsg->dnodeId);
 
   if (pMsg->dnodeId != dndGetDnodeId(pDnode)) {
     terrno = TSDB_CODE_DND_MNODE_ID_INVALID;

source/dnode/mgmt/impl/src/dndTransport.c

@@ -65,11 +65,9 @@ static void dndInitMsgFp(STransMgmt *pMgmt) {
   pMgmt->msgFp[TSDB_MSG_TYPE_USE_DB] = dndProcessMnodeWriteMsg;
   pMgmt->msgFp[TSDB_MSG_TYPE_ALTER_DB] = dndProcessMnodeWriteMsg;
   pMgmt->msgFp[TSDB_MSG_TYPE_SYNC_DB] = dndProcessMnodeWriteMsg;
-  pMgmt->msgFp[TSDB_MSG_TYPE_CREATE_TOPIC] = dndProcessMnodeWriteMsg;
-  pMgmt->msgFp[TSDB_MSG_TYPE_DROP_TOPIC] = dndProcessMnodeWriteMsg;
-  pMgmt->msgFp[TSDB_MSG_TYPE_ALTER_TOPIC] = dndProcessMnodeWriteMsg;
+  pMgmt->msgFp[TSDB_MSG_TYPE_COMPACT_DB] = dndProcessMnodeWriteMsg;
   pMgmt->msgFp[TSDB_MSG_TYPE_CREATE_FUNCTION] = dndProcessMnodeWriteMsg;
-  pMgmt->msgFp[TSDB_MSG_TYPE_ALTER_FUNCTION] = dndProcessMnodeWriteMsg;
+  pMgmt->msgFp[TSDB_MSG_TYPE_RETRIEVE_FUNCTION] = dndProcessMnodeWriteMsg;
   pMgmt->msgFp[TSDB_MSG_TYPE_DROP_FUNCTION] = dndProcessMnodeWriteMsg;
   pMgmt->msgFp[TSDB_MSG_TYPE_CREATE_STABLE] = dndProcessMnodeWriteMsg;
   pMgmt->msgFp[TSDB_MSG_TYPE_ALTER_STABLE] = dndProcessMnodeWriteMsg;
@@ -81,8 +79,6 @@ static void dndInitMsgFp(STransMgmt *pMgmt) {
   pMgmt->msgFp[TSDB_MSG_TYPE_HEARTBEAT] = dndProcessMnodeReadMsg;
   pMgmt->msgFp[TSDB_MSG_TYPE_SHOW] = dndProcessMnodeReadMsg;
   pMgmt->msgFp[TSDB_MSG_TYPE_SHOW_RETRIEVE] = dndProcessMnodeReadMsg;
-  pMgmt->msgFp[TSDB_MSG_TYPE_SHOW_RETRIEVE_FUNC] = dndProcessMnodeReadMsg;
-  pMgmt->msgFp[TSDB_MSG_TYPE_COMPACT_VNODE] = dndProcessMnodeWriteMsg;
 
   // message from client to dnode
   pMgmt->msgFp[TSDB_MSG_TYPE_NETWORK_TEST] = dndProcessDnodeReq;

source/dnode/mgmt/impl/test/CMakeLists.txt

-add_subdirectory(acct)
-add_subdirectory(cluster)
-add_subdirectory(profile)
-add_subdirectory(show)
+# add_subdirectory(acct)
+# add_subdirectory(cluster)
+# add_subdirectory(profile)
+# add_subdirectory(show)
+add_subdirectory(user)

source/dnode/mgmt/impl/test/cluster/cluster.cpp

@@ -93,21 +93,21 @@ TEST_F(DndTestCluster, ShowCluster) {
     EXPECT_EQ(pMeta->suid, 0);
 
     SSchema* pSchema = NULL;
-    pSchema = &pMeta->schema[0];
+    pSchema = &pMeta->pSchema[0];
     pSchema->bytes = htons(pSchema->bytes);
     EXPECT_EQ(pSchema->colId, 0);
     EXPECT_EQ(pSchema->type, TSDB_DATA_TYPE_INT);
     EXPECT_EQ(pSchema->bytes, 4);
     EXPECT_STREQ(pSchema->name, "id");
 
-    pSchema = &pMeta->schema[1];
+    pSchema = &pMeta->pSchema[1];
     pSchema->bytes = htons(pSchema->bytes);
     EXPECT_EQ(pSchema->colId, 0);
     EXPECT_EQ(pSchema->type, TSDB_DATA_TYPE_BINARY);
     EXPECT_EQ(pSchema->bytes, TSDB_CLUSTER_ID_LEN + VARSTR_HEADER_SIZE);
     EXPECT_STREQ(pSchema->name, "name");
 
-    pSchema = &pMeta->schema[2];
+    pSchema = &pMeta->pSchema[2];
     pSchema->bytes = htons(pSchema->bytes);
     EXPECT_EQ(pSchema->colId, 0);
     EXPECT_EQ(pSchema->type, TSDB_DATA_TYPE_TIMESTAMP);

source/dnode/mgmt/impl/test/profile/profile.cpp

@@ -152,49 +152,49 @@ TEST_F(DndTestProfile, SConnectMsg_03) {
     EXPECT_EQ(pMeta->suid, 0);
 
     SSchema* pSchema = NULL;
-    pSchema = &pMeta->schema[0];
+    pSchema = &pMeta->pSchema[0];
     pSchema->bytes = htons(pSchema->bytes);
     EXPECT_EQ(pSchema->colId, 0);
     EXPECT_EQ(pSchema->type, TSDB_DATA_TYPE_INT);
     EXPECT_EQ(pSchema->bytes, 4);
     EXPECT_STREQ(pSchema->name, "connId");
 
-    pSchema = &pMeta->schema[1];
+    pSchema = &pMeta->pSchema[1];
     pSchema->bytes = htons(pSchema->bytes);
     EXPECT_EQ(pSchema->colId, 0);
     EXPECT_EQ(pSchema->type, TSDB_DATA_TYPE_BINARY);
     EXPECT_EQ(pSchema->bytes, TSDB_USER_LEN + VARSTR_HEADER_SIZE);
     EXPECT_STREQ(pSchema->name, "user");
 
-    pSchema = &pMeta->schema[2];
+    pSchema = &pMeta->pSchema[2];
     pSchema->bytes = htons(pSchema->bytes);
     EXPECT_EQ(pSchema->colId, 0);
     EXPECT_EQ(pSchema->type, TSDB_DATA_TYPE_BINARY);
     EXPECT_EQ(pSchema->bytes, TSDB_USER_LEN + VARSTR_HEADER_SIZE);
     EXPECT_STREQ(pSchema->name, "program");
 
-    pSchema = &pMeta->schema[3];
+    pSchema = &pMeta->pSchema[3];
     pSchema->bytes = htons(pSchema->bytes);
     EXPECT_EQ(pSchema->colId, 0);
     EXPECT_EQ(pSchema->type, TSDB_DATA_TYPE_INT);
     EXPECT_EQ(pSchema->bytes, 4);
     EXPECT_STREQ(pSchema->name, "pid");
 
-    pSchema = &pMeta->schema[4];
+    pSchema = &pMeta->pSchema[4];
     pSchema->bytes = htons(pSchema->bytes);
     EXPECT_EQ(pSchema->colId, 0);
     EXPECT_EQ(pSchema->type, TSDB_DATA_TYPE_BINARY);
     EXPECT_EQ(pSchema->bytes, TSDB_IPv4ADDR_LEN + 6 + VARSTR_HEADER_SIZE);
     EXPECT_STREQ(pSchema->name, "ip:port");
 
-    pSchema = &pMeta->schema[5];
+    pSchema = &pMeta->pSchema[5];
     pSchema->bytes = htons(pSchema->bytes);
     EXPECT_EQ(pSchema->colId, 0);
     EXPECT_EQ(pSchema->type, TSDB_DATA_TYPE_TIMESTAMP);
     EXPECT_EQ(pSchema->bytes, 8);
     EXPECT_STREQ(pSchema->name, "login_time");
 
-    pSchema = &pMeta->schema[6];
+    pSchema = &pMeta->pSchema[6];
     pSchema->bytes = htons(pSchema->bytes);
     EXPECT_EQ(pSchema->colId, 0);
     EXPECT_EQ(pSchema->type, TSDB_DATA_TYPE_TIMESTAMP);
@@ -493,28 +493,28 @@ TEST_F(DndTestProfile, SKillQueryMsg_03) {
     EXPECT_EQ(pMeta->suid, 0);
 
     SSchema* pSchema = NULL;
-    pSchema = &pMeta->schema[0];
+    pSchema = &pMeta->pSchema[0];
     pSchema->bytes = htons(pSchema->bytes);
     EXPECT_EQ(pSchema->colId, 0);
     EXPECT_EQ(pSchema->type, TSDB_DATA_TYPE_INT);
     EXPECT_EQ(pSchema->bytes, 4);
     EXPECT_STREQ(pSchema->name, "queryId");
 
-    pSchema = &pMeta->schema[1];
+    pSchema = &pMeta->pSchema[1];
     pSchema->bytes = htons(pSchema->bytes);
     EXPECT_EQ(pSchema->colId, 0);
     EXPECT_EQ(pSchema->type, TSDB_DATA_TYPE_INT);
     EXPECT_EQ(pSchema->bytes, 4);
     EXPECT_STREQ(pSchema->name, "connId");
 
-    pSchema = &pMeta->schema[2];
+    pSchema = &pMeta->pSchema[2];
     pSchema->bytes = htons(pSchema->bytes);
     EXPECT_EQ(pSchema->colId, 0);
     EXPECT_EQ(pSchema->type, TSDB_DATA_TYPE_BINARY);
     EXPECT_EQ(pSchema->bytes, TSDB_USER_LEN + VARSTR_HEADER_SIZE);
     EXPECT_STREQ(pSchema->name, "user");
 
-    pSchema = &pMeta->schema[3];
+    pSchema = &pMeta->pSchema[3];
     pSchema->bytes = htons(pSchema->bytes);
     EXPECT_EQ(pSchema->colId, 0);
     EXPECT_EQ(pSchema->type, TSDB_DATA_TYPE_BINARY);
@@ -680,21 +680,21 @@ TEST_F(DndTestProfile, SKillStreamMsg_03) {
     EXPECT_EQ(pMeta->suid, 0);
 
     SSchema* pSchema = NULL;
-    pSchema = &pMeta->schema[0];
+    pSchema = &pMeta->pSchema[0];
     pSchema->bytes = htons(pSchema->bytes);
     EXPECT_EQ(pSchema->colId, 0);
     EXPECT_EQ(pSchema->type, TSDB_DATA_TYPE_INT);
     EXPECT_EQ(pSchema->bytes, 4);
     EXPECT_STREQ(pSchema->name, "streamId");
 
-    pSchema = &pMeta->schema[1];
+    pSchema = &pMeta->pSchema[1];
     pSchema->bytes = htons(pSchema->bytes);
     EXPECT_EQ(pSchema->colId, 0);
     EXPECT_EQ(pSchema->type, TSDB_DATA_TYPE_INT);
     EXPECT_EQ(pSchema->bytes, 4);
     EXPECT_STREQ(pSchema->name, "connId");
 
-    pSchema = &pMeta->schema[2];
+    pSchema = &pMeta->pSchema[2];
     pSchema->bytes = htons(pSchema->bytes);
     EXPECT_EQ(pSchema->colId, 0);
     EXPECT_EQ(pSchema->type, TSDB_DATA_TYPE_BINARY);

source/dnode/mgmt/impl/test/show/show.cpp

@@ -154,49 +154,49 @@ TEST_F(DndTestShow, SShowMsg_04) {
     EXPECT_EQ(pMeta->suid, 0);
 
     SSchema* pSchema = NULL;
-    pSchema = &pMeta->schema[0];
+    pSchema = &pMeta->pSchema[0];
     pSchema->bytes = htons(pSchema->bytes);
     EXPECT_EQ(pSchema->colId, 0);
     EXPECT_EQ(pSchema->type, TSDB_DATA_TYPE_INT);
     EXPECT_EQ(pSchema->bytes, 4);
     EXPECT_STREQ(pSchema->name, "connId");
 
-    pSchema = &pMeta->schema[1];
+    pSchema = &pMeta->pSchema[1];
     pSchema->bytes = htons(pSchema->bytes);
     EXPECT_EQ(pSchema->colId, 0);
     EXPECT_EQ(pSchema->type, TSDB_DATA_TYPE_BINARY);
     EXPECT_EQ(pSchema->bytes, TSDB_USER_LEN + VARSTR_HEADER_SIZE);
     EXPECT_STREQ(pSchema->name, "user");
 
-    pSchema = &pMeta->schema[2];
+    pSchema = &pMeta->pSchema[2];
     pSchema->bytes = htons(pSchema->bytes);
     EXPECT_EQ(pSchema->colId, 0);
     EXPECT_EQ(pSchema->type, TSDB_DATA_TYPE_BINARY);
     EXPECT_EQ(pSchema->bytes, TSDB_USER_LEN + VARSTR_HEADER_SIZE);
     EXPECT_STREQ(pSchema->name, "program");
 
-    pSchema = &pMeta->schema[3];
+    pSchema = &pMeta->pSchema[3];
     pSchema->bytes = htons(pSchema->bytes);
     EXPECT_EQ(pSchema->colId, 0);
     EXPECT_EQ(pSchema->type, TSDB_DATA_TYPE_INT);
     EXPECT_EQ(pSchema->bytes, 4);
     EXPECT_STREQ(pSchema->name, "pid");
 
-    pSchema = &pMeta->schema[4];
+    pSchema = &pMeta->pSchema[4];
     pSchema->bytes = htons(pSchema->bytes);
     EXPECT_EQ(pSchema->colId, 0);
     EXPECT_EQ(pSchema->type, TSDB_DATA_TYPE_BINARY);
     EXPECT_EQ(pSchema->bytes, TSDB_IPv4ADDR_LEN + 6 + VARSTR_HEADER_SIZE);
     EXPECT_STREQ(pSchema->name, "ip:port");
 
-    pSchema = &pMeta->schema[5];
+    pSchema = &pMeta->pSchema[5];
     pSchema->bytes = htons(pSchema->bytes);
     EXPECT_EQ(pSchema->colId, 0);
     EXPECT_EQ(pSchema->type, TSDB_DATA_TYPE_TIMESTAMP);
     EXPECT_EQ(pSchema->bytes, 8);
     EXPECT_STREQ(pSchema->name, "login_time");
 
-    pSchema = &pMeta->schema[6];
+    pSchema = &pMeta->pSchema[6];
     pSchema->bytes = htons(pSchema->bytes);
     EXPECT_EQ(pSchema->colId, 0);
     EXPECT_EQ(pSchema->type, TSDB_DATA_TYPE_TIMESTAMP);

source/dnode/mgmt/impl/test/sut/deploy.cpp

@@ -34,7 +34,6 @@ void initLog(const char* path) {
   sDebugFlag = 0;
   tsdbDebugFlag = 0;
   cqDebugFlag = 0;
-  debugFlag = 0;
 
   char temp[PATH_MAX];
   snprintf(temp, PATH_MAX, "%s/taosdlog", path);

source/dnode/mgmt/impl/test/user/CMakeLists.txt

+add_executable(dndTestUser "")
+
+target_sources(dndTestUser
+    PRIVATE
+    "user.cpp"
+    "../sut/deploy.cpp"
+)
+
+target_link_libraries(
+    dndTestUser
+    PUBLIC dnode
+    PUBLIC util
+    PUBLIC os
+    PUBLIC gtest_main
+)
+
+target_include_directories(dndTestUser
+    PUBLIC
+    "${CMAKE_SOURCE_DIR}/include/server/dnode/mgmt"
+    "${CMAKE_CURRENT_SOURCE_DIR}/../../inc"
+    "${CMAKE_CURRENT_SOURCE_DIR}/../sut"
+)
+
+enable_testing()
+
+add_test(
+    NAME dndTestUser
+    COMMAND dndTestUser
+)

source/dnode/mgmt/impl/test/user/user.cpp

+/*
+ * Copyright (c) 2019 TAOS Data, Inc. <jhtao@taosdata.com>
+ *
+ * This program is free software: you can use, redistribute, and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3
+ * or later ("AGPL"), as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "deploy.h"
+
+class DndTestUser : public ::testing::Test {
+ protected:
+  void SetUp() override {}
+  void TearDown() override {}
+
+  static void SetUpTestSuite() {
+    const char* user = "root";
+    const char* pass = "taosdata";
+    const char* path = "/tmp/dndTestUser";
+    const char* fqdn = "localhost";
+    uint16_t    port = 9524;
+
+    pServer = createServer(path, fqdn, port);
+    ASSERT(pServer);
+    pClient = createClient(user, pass, fqdn, port);
+  }
+
+  static void TearDownTestSuite() {
+    dropServer(pServer);
+    dropClient(pClient);
+  }
+
+  static SServer* pServer;
+  static SClient* pClient;
+  static int32_t  connId;
+};
+
+SServer* DndTestUser::pServer;
+SClient* DndTestUser::pClient;
+int32_t  DndTestUser::connId;
+
+#if 0
+TEST_F(DndTestUser, ShowUser) {
+  int32_t showId = 0;
+
+  //--- meta ---
+  SShowMsg* pShow = (SShowMsg*)rpcMallocCont(sizeof(SShowMsg));
+  pShow->type = TSDB_MGMT_TABLE_USER;
+  strcpy(pShow->db, "");
+
+  SRpcMsg showRpcMsg = {0};
+  showRpcMsg.pCont = pShow;
+  showRpcMsg.contLen = sizeof(SShowMsg);
+  showRpcMsg.msgType = TSDB_MSG_TYPE_SHOW;
+
+  sendMsg(pClient, &showRpcMsg);
+  ASSERT_NE(pClient->pRsp, nullptr);
+
+  SShowRsp* pShowRsp = (SShowRsp*)pClient->pRsp->pCont;
+  ASSERT_NE(pShowRsp, nullptr);
+  pShowRsp->showId = htonl(pShowRsp->showId);
+  STableMetaMsg* pMeta = &pShowRsp->tableMeta;
+  pMeta->contLen = htonl(pMeta->contLen);
+  pMeta->numOfColumns = htons(pMeta->numOfColumns);
+  pMeta->sversion = htons(pMeta->sversion);
+  pMeta->tversion = htons(pMeta->tversion);
+  pMeta->tid = htonl(pMeta->tid);
+  pMeta->uid = htobe64(pMeta->uid);
+  pMeta->suid = htobe64(pMeta->suid);
+
+  showId = pShowRsp->showId;
+
+  EXPECT_NE(pShowRsp->showId, 0);
+  EXPECT_EQ(pMeta->contLen, 0);
+  EXPECT_STREQ(pMeta->tableFname, "show users");
+  EXPECT_EQ(pMeta->numOfTags, 0);
+  EXPECT_EQ(pMeta->precision, 0);
+  EXPECT_EQ(pMeta->tableType, 0);
+  EXPECT_EQ(pMeta->numOfColumns, 4);
+  EXPECT_EQ(pMeta->sversion, 0);
+  EXPECT_EQ(pMeta->tversion, 0);
+  EXPECT_EQ(pMeta->tid, 0);
+  EXPECT_EQ(pMeta->uid, 0);
+  EXPECT_STREQ(pMeta->sTableName, "");
+  EXPECT_EQ(pMeta->suid, 0);
+
+  SSchema* pSchema = NULL;
+
+  pSchema = &pMeta->pSchema[0];
+  pSchema->bytes = htons(pSchema->bytes);
+  EXPECT_EQ(pSchema->colId, 0);
+  EXPECT_EQ(pSchema->type, TSDB_DATA_TYPE_BINARY);
+  EXPECT_EQ(pSchema->bytes, TSDB_USER_LEN + VARSTR_HEADER_SIZE);
+  EXPECT_STREQ(pSchema->name, "name");
+
+  pSchema = &pMeta->pSchema[1];
+  pSchema->bytes = htons(pSchema->bytes);
+  EXPECT_EQ(pSchema->colId, 0);
+  EXPECT_EQ(pSchema->type, TSDB_DATA_TYPE_BINARY);
+  EXPECT_EQ(pSchema->bytes, 10 + VARSTR_HEADER_SIZE);
+  EXPECT_STREQ(pSchema->name, "privilege");
+
+  pSchema = &pMeta->pSchema[2];
+  pSchema->bytes = htons(pSchema->bytes);
+  EXPECT_EQ(pSchema->colId, 0);
+  EXPECT_EQ(pSchema->type, TSDB_DATA_TYPE_TIMESTAMP);
+  EXPECT_EQ(pSchema->bytes, 8);
+  EXPECT_STREQ(pSchema->name, "create_time");
+
+  pSchema = &pMeta->pSchema[3];
+  pSchema->bytes = htons(pSchema->bytes);
+  EXPECT_EQ(pSchema->colId, 0);
+  EXPECT_EQ(pSchema->type, TSDB_DATA_TYPE_BINARY);
+  EXPECT_EQ(pSchema->bytes, TSDB_USER_LEN + VARSTR_HEADER_SIZE);
+  EXPECT_STREQ(pSchema->name, "account");
+
+  //--- retrieve ---
+  SRetrieveTableMsg* pRetrieve = (SRetrieveTableMsg*)rpcMallocCont(sizeof(SRetrieveTableMsg));
+  pRetrieve->showId = htonl(showId);
+  pRetrieve->free = 0;
+
+  SRpcMsg retrieveRpcMsg = {0};
+  retrieveRpcMsg.pCont = pRetrieve;
+  retrieveRpcMsg.contLen = sizeof(SRetrieveTableMsg);
+  retrieveRpcMsg.msgType = TSDB_MSG_TYPE_SHOW_RETRIEVE;
+
+  sendMsg(pClient, &retrieveRpcMsg);
+  ASSERT_NE(pClient->pRsp, nullptr);
+  ASSERT_EQ(pClient->pRsp->code, 0);
+
+  SRetrieveTableRsp* pRetrieveRsp = (SRetrieveTableRsp*)pClient->pRsp->pCont;
+  ASSERT_NE(pRetrieveRsp, nullptr);
+  pRetrieveRsp->numOfRows = htonl(pRetrieveRsp->numOfRows);
+  pRetrieveRsp->offset = htobe64(pRetrieveRsp->offset);
+  pRetrieveRsp->useconds = htobe64(pRetrieveRsp->useconds);
+  pRetrieveRsp->compLen = htonl(pRetrieveRsp->compLen);
+
+  EXPECT_EQ(pRetrieveRsp->numOfRows, 2);
+  EXPECT_EQ(pRetrieveRsp->offset, 0);
+  EXPECT_EQ(pRetrieveRsp->useconds, 0);
+  EXPECT_EQ(pRetrieveRsp->completed, 1);
+  EXPECT_EQ(pRetrieveRsp->precision, TSDB_TIME_PRECISION_MILLI);
+  EXPECT_EQ(pRetrieveRsp->compressed, 0);
+  EXPECT_EQ(pRetrieveRsp->reserved, 0);
+  EXPECT_EQ(pRetrieveRsp->compLen, 0);
+
+  char*   pData = pRetrieveRsp->data;
+  int32_t pos = 0;
+  char*   strVal = NULL;
+  int64_t int64Val = 0;
+
+  //--- name ---
+  {
+    pos += sizeof(VarDataLenT);
+    strVal = (char*)(pData + pos);
+    pos += TSDB_USER_LEN;
+    EXPECT_STREQ(strVal, "root");
+
+    pos += sizeof(VarDataLenT);
+    strVal = (char*)(pData + pos);
+    pos += TSDB_USER_LEN;
+    EXPECT_STREQ(strVal, "_root");
+  }
+
+  //--- privilege ---
+  {
+    pos += sizeof(VarDataLenT);
+    strVal = (char*)(pData + pos);
+    pos += 10;
+    EXPECT_STREQ(strVal, "super");
+
+    pos += sizeof(VarDataLenT);
+    strVal = (char*)(pData + pos);
+    pos += 10;
+    EXPECT_STREQ(strVal, "writable");
+  }
+
+  //--- create_time ---
+  {
+    int64Val = *((int64_t*)(pData + pos));
+    pos += sizeof(int64_t);
+    EXPECT_GT(int64Val, 0);
+
+    int64Val = *((int64_t*)(pData + pos));
+    pos += sizeof(int64_t);
+    EXPECT_GT(int64Val, 0);
+  }
+
+  //--- account ---
+  {
+    pos += sizeof(VarDataLenT);
+    strVal = (char*)(pData + pos);
+    pos += TSDB_USER_LEN;
+    EXPECT_STREQ(strVal, "root");
+
+    pos += sizeof(VarDataLenT);
+    strVal = (char*)(pData + pos);
+    pos += TSDB_USER_LEN;
+    EXPECT_STREQ(strVal, "root");
+  }
+}
+#endif
+
+TEST_F(DndTestUser, CreateUser_01) {
+  ASSERT_NE(pClient, nullptr);
+
+  //--- create user ---
+  SCreateUserMsg* pReq = (SCreateUserMsg*)rpcMallocCont(sizeof(SCreateUserMsg));
+  strcpy(pReq->user, "u1");
+  strcpy(pReq->pass, "p1");
+
+  SRpcMsg rpcMsg = {0};
+  rpcMsg.pCont = pReq;
+  rpcMsg.contLen = sizeof(SCreateUserMsg);
+  rpcMsg.msgType = TSDB_MSG_TYPE_CREATE_USER;
+
+  sendMsg(pClient, &rpcMsg);
+  SRpcMsg* pMsg = pClient->pRsp;
+  ASSERT_NE(pMsg, nullptr);
+  ASSERT_EQ(pMsg->code, 0);
+
+  //--- meta ---
+  SShowMsg* pShow = (SShowMsg*)rpcMallocCont(sizeof(SShowMsg));
+  pShow->type = TSDB_MGMT_TABLE_USER;
+  SRpcMsg showRpcMsg = {0};
+  showRpcMsg.pCont = pShow;
+  showRpcMsg.contLen = sizeof(SShowMsg);
+  showRpcMsg.msgType = TSDB_MSG_TYPE_SHOW;
+
+  sendMsg(pClient, &showRpcMsg);
+  SShowRsp*      pShowRsp = (SShowRsp*)pClient->pRsp->pCont;
+  STableMetaMsg* pMeta = &pShowRsp->tableMeta;
+  pMeta->numOfColumns = htons(pMeta->numOfColumns);
+  EXPECT_EQ(pMeta->numOfColumns, 4);
+
+  //--- retrieve ---
+  SRetrieveTableMsg* pRetrieve = (SRetrieveTableMsg*)rpcMallocCont(sizeof(SRetrieveTableMsg));
+  pRetrieve->showId = pShowRsp->showId;
+  SRpcMsg retrieveRpcMsg = {0};
+  retrieveRpcMsg.pCont = pRetrieve;
+  retrieveRpcMsg.contLen = sizeof(SRetrieveTableMsg);
+  retrieveRpcMsg.msgType = TSDB_MSG_TYPE_SHOW_RETRIEVE;
+
+  sendMsg(pClient, &retrieveRpcMsg);
+  SRetrieveTableRsp* pRetrieveRsp = (SRetrieveTableRsp*)pClient->pRsp->pCont;
+  pRetrieveRsp->numOfRows = htonl(pRetrieveRsp->numOfRows);
+  EXPECT_EQ(pRetrieveRsp->numOfRows, 3);
+
+  char*   pData = pRetrieveRsp->data;
+  int32_t pos = 0;
+  char*   strVal = NULL;
+
+  //--- name ---
+  {
+    pos += sizeof(VarDataLenT);
+    strVal = (char*)(pData + pos);
+    pos += TSDB_USER_LEN;
+    EXPECT_STREQ(strVal, "u1");
+
+    pos += sizeof(VarDataLenT);
+    strVal = (char*)(pData + pos);
+    pos += TSDB_USER_LEN;
+    EXPECT_STREQ(strVal, "root");
+
+    pos += sizeof(VarDataLenT);
+    strVal = (char*)(pData + pos);
+    pos += TSDB_USER_LEN;
+    EXPECT_STREQ(strVal, "_root");
+  }
+}
+
+TEST_F(DndTestUser, AlterUser_01) {
+  ASSERT_NE(pClient, nullptr);
+
+  //--- drop user ---
+  SAlterUserMsg* pReq = (SAlterUserMsg*)rpcMallocCont(sizeof(SAlterUserMsg));
+  strcpy(pReq->user, "u1");
+  strcpy(pReq->pass, "p2");
+
+  SRpcMsg rpcMsg = {0};
+  rpcMsg.pCont = pReq;
+  rpcMsg.contLen = sizeof(SAlterUserMsg);
+  rpcMsg.msgType = TSDB_MSG_TYPE_ALTER_USER;
+
+  sendMsg(pClient, &rpcMsg);
+  SRpcMsg* pMsg = pClient->pRsp;
+  ASSERT_NE(pMsg, nullptr);
+  ASSERT_EQ(pMsg->code, 0);
+
+  //--- meta ---
+  SShowMsg* pShow = (SShowMsg*)rpcMallocCont(sizeof(SShowMsg));
+  pShow->type = TSDB_MGMT_TABLE_USER;
+  SRpcMsg showRpcMsg = {0};
+  showRpcMsg.pCont = pShow;
+  showRpcMsg.contLen = sizeof(SShowMsg);
+  showRpcMsg.msgType = TSDB_MSG_TYPE_SHOW;
+
+  sendMsg(pClient, &showRpcMsg);
+  SShowRsp*      pShowRsp = (SShowRsp*)pClient->pRsp->pCont;
+  STableMetaMsg* pMeta = &pShowRsp->tableMeta;
+  pMeta->numOfColumns = htons(pMeta->numOfColumns);
+  EXPECT_EQ(pMeta->numOfColumns, 4);
+
+  //--- retrieve ---
+  SRetrieveTableMsg* pRetrieve = (SRetrieveTableMsg*)rpcMallocCont(sizeof(SRetrieveTableMsg));
+  pRetrieve->showId = pShowRsp->showId;
+  SRpcMsg retrieveRpcMsg = {0};
+  retrieveRpcMsg.pCont = pRetrieve;
+  retrieveRpcMsg.contLen = sizeof(SRetrieveTableMsg);
+  retrieveRpcMsg.msgType = TSDB_MSG_TYPE_SHOW_RETRIEVE;
+
+  sendMsg(pClient, &retrieveRpcMsg);
+  SRetrieveTableRsp* pRetrieveRsp = (SRetrieveTableRsp*)pClient->pRsp->pCont;
+  pRetrieveRsp->numOfRows = htonl(pRetrieveRsp->numOfRows);
+  EXPECT_EQ(pRetrieveRsp->numOfRows, 3);
+
+  char*   pData = pRetrieveRsp->data;
+  int32_t pos = 0;
+  char*   strVal = NULL;
+
+  //--- name ---
+  {
+    pos += sizeof(VarDataLenT);
+    strVal = (char*)(pData + pos);
+    pos += TSDB_USER_LEN;
+    EXPECT_STREQ(strVal, "u1");
+
+    pos += sizeof(VarDataLenT);
+    strVal = (char*)(pData + pos);
+    pos += TSDB_USER_LEN;
+    EXPECT_STREQ(strVal, "root");
+
+    pos += sizeof(VarDataLenT);
+    strVal = (char*)(pData + pos);
+    pos += TSDB_USER_LEN;
+    EXPECT_STREQ(strVal, "_root");
+  }
+}
+
+TEST_F(DndTestUser, DropUser_01) {
+  ASSERT_NE(pClient, nullptr);
+
+  //--- drop user ---
+  SDropUserMsg* pReq = (SDropUserMsg*)rpcMallocCont(sizeof(SDropUserMsg));
+  strcpy(pReq->user, "u1");
+
+  SRpcMsg rpcMsg = {0};
+  rpcMsg.pCont = pReq;
+  rpcMsg.contLen = sizeof(SDropUserMsg);
+  rpcMsg.msgType = TSDB_MSG_TYPE_DROP_USER;
+
+  sendMsg(pClient, &rpcMsg);
+  SRpcMsg* pMsg = pClient->pRsp;
+  ASSERT_NE(pMsg, nullptr);
+  ASSERT_EQ(pMsg->code, 0);
+
+  //--- meta ---
+  SShowMsg* pShow = (SShowMsg*)rpcMallocCont(sizeof(SShowMsg));
+  pShow->type = TSDB_MGMT_TABLE_USER;
+  SRpcMsg showRpcMsg = {0};
+  showRpcMsg.pCont = pShow;
+  showRpcMsg.contLen = sizeof(SShowMsg);
+  showRpcMsg.msgType = TSDB_MSG_TYPE_SHOW;
+
+  sendMsg(pClient, &showRpcMsg);
+  SShowRsp*      pShowRsp = (SShowRsp*)pClient->pRsp->pCont;
+  STableMetaMsg* pMeta = &pShowRsp->tableMeta;
+  pMeta->numOfColumns = htons(pMeta->numOfColumns);
+  EXPECT_EQ(pMeta->numOfColumns, 4);
+
+  //--- retrieve ---
+  SRetrieveTableMsg* pRetrieve = (SRetrieveTableMsg*)rpcMallocCont(sizeof(SRetrieveTableMsg));
+  pRetrieve->showId = pShowRsp->showId;
+  SRpcMsg retrieveRpcMsg = {0};
+  retrieveRpcMsg.pCont = pRetrieve;
+  retrieveRpcMsg.contLen = sizeof(SRetrieveTableMsg);
+  retrieveRpcMsg.msgType = TSDB_MSG_TYPE_SHOW_RETRIEVE;
+
+  sendMsg(pClient, &retrieveRpcMsg);
+  SRetrieveTableRsp* pRetrieveRsp = (SRetrieveTableRsp*)pClient->pRsp->pCont;
+  pRetrieveRsp->numOfRows = htonl(pRetrieveRsp->numOfRows);
+  EXPECT_EQ(pRetrieveRsp->numOfRows, 2);
+
+  char*   pData = pRetrieveRsp->data;
+  int32_t pos = 0;
+  char*   strVal = NULL;
+
+  //--- name ---
+  {
+    pos += sizeof(VarDataLenT);
+    strVal = (char*)(pData + pos);
+    pos += TSDB_USER_LEN;
+    EXPECT_STREQ(strVal, "root");
+
+    pos += sizeof(VarDataLenT);
+    strVal = (char*)(pData + pos);
+    pos += TSDB_USER_LEN;
+    EXPECT_STREQ(strVal, "_root");
+  }
+}
\ No newline at end of file

source/dnode/mnode/impl/inc/mndDef.h

@@ -47,7 +47,6 @@ typedef struct SAcctObj    SAcctObj;
 typedef struct SUserObj    SUserObj;
 typedef struct SDbObj      SDbObj;
 typedef struct SVgObj      SVgObj;
-typedef struct SSTableObj  SSTableObj;
 typedef struct SFuncObj    SFuncObj;
 typedef struct SOperObj    SOperObj;
 
@@ -195,7 +194,6 @@ typedef struct SUserObj {
 typedef struct {
   int32_t cacheBlockSize;
   int32_t totalBlocks;
-  int32_t maxTables;
   int32_t daysPerFile;
   int32_t daysToKeep0;
   int32_t daysToKeep1;
@@ -204,102 +202,91 @@ typedef struct {
   int32_t maxRowsPerFileBlock;
   int32_t commitTime;
   int32_t fsyncPeriod;
+  int8_t  walLevel;
   int8_t  precision;
   int8_t  compression;
-  int8_t  walLevel;
   int8_t  replications;
   int8_t  quorum;
   int8_t  update;
   int8_t  cacheLastRow;
-  int8_t  dbType;
-  int16_t partitions;
 } SDbCfg;
 
 typedef struct SDbObj {
-  char      name[TSDB_FULL_DB_NAME_LEN];
-  char      acct[TSDB_USER_LEN];
-  int64_t   createdTime;
-  int64_t   updateTime;
-  SDbCfg    cfg;
-  int64_t   uid;
-  int8_t    status;
-  int32_t   numOfVgroups;
-  int32_t   numOfTables;
-  int32_t   numOfSuperTables;
-  int32_t   vgListSize;
-  int32_t   vgListIndex;
-  SVgObj  **vgList;
-  SAcctObj *pAcct;
+  char    name[TSDB_FULL_DB_NAME_LEN];
+  char    acct[TSDB_USER_LEN];
+  int64_t createdTime;
+  int64_t updateTime;
+  int64_t uid;
+  SDbCfg  cfg;
 } SDbObj;
 
 typedef struct {
   int32_t    dnodeId;
-  int8_t     role;
-  SDnodeObj *pDnode;
+  ESyncState role;
 } SVnodeGid;
 
 typedef struct SVgObj {
-  uint32_t  vgId;
-  int32_t   numOfVnodes;
+  int32_t   vgId;
   int64_t   createdTime;
   int64_t   updateTime;
-  int32_t   lbDnodeId;
-  int32_t   lbTime;
+  int32_t   version;
   char      dbName[TSDB_FULL_DB_NAME_LEN];
-  int8_t    inUse;
-  int8_t    accessState;
-  int8_t    status;
-  SVnodeGid vnodeGid[TSDB_MAX_REPLICA];
-  int32_t   vgCfgVersion;
-  int8_t    compact;
   int32_t   numOfTables;
+  int32_t   numOfTimeSeries;
   int64_t   totalStorage;
   int64_t   compStorage;
   int64_t   pointsWritten;
-  SDbObj   *pDb;
+  int8_t    compact;
+  int8_t    replica;
+  SVnodeGid vnodeGid[TSDB_MAX_REPLICA];
 } SVgObj;
 
-typedef struct SSTableObj {
-  char     tableId[TSDB_TABLE_NAME_LEN];
-  uint64_t uid;
+typedef struct SStableObj {
+  char     name[TSDB_TABLE_FNAME_LEN];
+  char     db[TSDB_FULL_DB_NAME_LEN];
   int64_t  createdTime;
   int64_t  updateTime;
-  int32_t  numOfColumns;  // used by normal table
+  uint64_t uid;
+  int32_t  version;
+  int32_t  numOfColumns;
   int32_t  numOfTags;
-  SSchema *schema;
-} SSTableObj;
+  SRWLatch lock;
+  SSchema *columnSchema;
+  SSchema *tagSchema;
+} SStableObj;
 
 typedef struct SFuncObj {
   char    name[TSDB_FUNC_NAME_LEN];
-  char    path[128];
-  int32_t contLen;
-  char    cont[TSDB_FUNC_CODE_LEN];
-  int32_t funcType;
-  int32_t bufSize;
   int64_t createdTime;
-  uint8_t resType;
-  int16_t resBytes;
-  int64_t sig;
-  int16_t type;
+  int8_t  funcType;
+  int8_t  scriptType;
+  int8_t  align;
+  int8_t  outputType;
+  int32_t outputLen;
+  int32_t bufSize;
+  int64_t sigature;
+  int32_t commentSize;
+  int32_t codeSize;
+  char   *pComment;
+  char   *pCode;
+  char    pData[];
 } SFuncObj;
 
-typedef struct SShowObj SShowObj;
-typedef struct SShowObj {
-  int8_t     type;
-  int8_t     maxReplica;
-  int16_t    numOfColumns;
-  int32_t    id;
-  int32_t    rowSize;
-  int32_t    numOfRows;
-  int32_t    numOfReads;
-  uint16_t   payloadLen;
-  void      *pIter;
-  void      *pVgIter;
-  SMnode    *pMnode;
-  char       db[TSDB_FULL_DB_NAME_LEN];
-  int16_t    offset[TSDB_MAX_COLUMNS];
-  int32_t    bytes[TSDB_MAX_COLUMNS];
-  char       payload[];
+typedef struct {
+  int32_t id;
+  int8_t  type;
+  int8_t  replica;
+  int16_t numOfColumns;
+  int32_t rowSize;
+  int32_t numOfRows;
+  int32_t numOfReads;
+  int32_t payloadLen;
+  void   *pIter;
+  SMnode *pMnode;
+  char    db[TSDB_FULL_DB_NAME_LEN];
+  int16_t offset[TSDB_MAX_COLUMNS];
+  int32_t bytes[TSDB_MAX_COLUMNS];
+  char    payload[];
 } SShowObj;
 
 typedef struct SMnodeMsg {
@@ -318,6 +305,11 @@ typedef struct SMnodeMsg {
   void   *pCont;
 } SMnodeMsg;
 
+typedef struct {
+  int32_t id;
+  void   *rpcHandle;
+} STransMsg;
+
 #ifdef __cplusplus
 }
 #endif

source/dnode/mnode/impl/inc/mndDnode.h

@@ -26,6 +26,8 @@ int32_t    mndInitDnode(SMnode *pMnode);
 void       mndCleanupDnode(SMnode *pMnode);
 SDnodeObj *mndAcquireDnode(SMnode *pMnode, int32_t dnodeId);
 void       mndReleaseDnode(SMnode *pMnode, SDnodeObj *pDnode);
+SEpSet     mndGetDnodeEpset(SDnodeObj *pDnode);
+int32_t    mndGetDnodeSize(SMnode *pMnode);
 
 #ifdef __cplusplus
 }

source/dnode/mnode/impl/inc/mndInt.h

@@ -20,6 +20,7 @@
 #include "sdb.h"
 #include "tcache.h"
 #include "tqueue.h"
+#include "ttime.h"
 
 #ifdef __cplusplus
 extern "C" {

source/dnode/mnode/impl/inc/mndMnode.h

@@ -26,6 +26,7 @@ int32_t mndInitMnode(SMnode *pMnode);
 void    mndCleanupMnode(SMnode *pMnode);
 bool    mndIsMnode(SMnode *pMnode, int32_t dnodeId);
 void    mndGetMnodeEpSet(SMnode *pMnode, SEpSet *pEpSet);
+char   *mndGetRoleStr(int32_t role);
 
 #ifdef __cplusplus
 }

source/dnode/mnode/impl/inc/mndOper.h

-/*
- * Copyright (c) 2019 TAOS Data, Inc. <jhtao@taosdata.com>
- *
- * This program is free software: you can use, redistribute, and/or modify
- * it under the terms of the GNU Affero General Public License, version 3
- * or later ("AGPL"), as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.
- *
- * You should have received a copy of the GNU Affero General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
-
-#ifndef _TD_MND_OPER_H_
-#define _TD_MND_OPER_H_
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-int32_t mndInitOper(SMnode *pMnode);
-void    mndCleanupOper(SMnode *pMnode);
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif /*_TD_MND_OPER_H_*/

source/dnode/mnode/impl/inc/mndShow.h

@@ -28,6 +28,7 @@ void    mndAddShowMetaHandle(SMnode *pMnode, EShowType showType, ShowMetaFp fp);
 void    mndAddShowRetrieveHandle(SMnode *pMnode, EShowType showType, ShowRetrieveFp fp);
 void    mndAddShowFreeIterHandle(SMnode *pMnode, EShowType msgType, ShowFreeIterFp fp);
 void    mnodeVacuumResult(char *data, int32_t numOfCols, int32_t rows, int32_t capacity, SShowObj *pShow);
+char   *mndShowStr(int32_t showType);
 
 #ifdef __cplusplus
 }

source/dnode/mnode/impl/inc/mndSync.h

@@ -25,7 +25,7 @@ extern "C" {
 int32_t mndInitSync(SMnode *pMnode);
 void    mndCleanupSync(SMnode *pMnode);
 bool    mndIsMaster(SMnode *pMnode);
-int32_t mndSyncPropose(SSdbRaw *pRaw, void *pData);
+int32_t mndSyncPropose(SMnode *pMnode, SSdbRaw *pRaw, STransMsg *pMsg);
 
 #ifdef __cplusplus
 }

source/dnode/mnode/impl/inc/mndTrans.h

@@ -33,13 +33,10 @@ int32_t mndTransAppendCommitlog(STrans *pTrans, SSdbRaw *pRaw);
 int32_t mndTransAppendRedoAction(STrans *pTrans, SEpSet *, void *pMsg);
 int32_t mndTransAppendUndoAction(STrans *pTrans, SEpSet *, void *pMsg);
 
-int32_t mndTransPrepare(STrans *pTrans, int32_t (*syncfp)(SSdbRaw *pRaw, void *pData));
-int32_t mndTransApply(SMnode *pMnode, SSdbRaw *pRaw, void *pData, int32_t code);
+int32_t mndTransPrepare(STrans *pTrans);
+void    mndTransApply(SMnode *pMnode, SSdbRaw *pRaw, STransMsg *pMsg, int32_t code);
 int32_t mndTransExecute(SSdb *pSdb, int32_t tranId);
 
-SSdbRaw *mndTransActionEncode(STrans *pTrans);
-SSdbRow *mndTransActionDecode(SSdbRaw *pRaw);
-
 #ifdef __cplusplus
 }
 #endif

source/dnode/mnode/impl/inc/mndVgroup.h

@@ -24,6 +24,8 @@ extern "C" {
 
 int32_t mndInitVgroup(SMnode *pMnode);
 void    mndCleanupVgroup(SMnode *pMnode);
+SVgObj *mndAcquireVgroup(SMnode *pMnode, int32_t vgId);
+void    mndReleaseVgroup(SMnode *pMnode, SVgObj *pVgroup);
 
 #ifdef __cplusplus
 }

source/dnode/mnode/impl/src/mndAcct.c

@@ -24,7 +24,7 @@ static SSdbRaw *mnodeAcctActionEncode(SAcctObj *pAcct);
 static SSdbRow *mnodeAcctActionDecode(SSdbRaw *pRaw);
 static int32_t  mnodeAcctActionInsert(SSdb *pSdb, SAcctObj *pAcct);
 static int32_t  mnodeAcctActionDelete(SSdb *pSdb, SAcctObj *pAcct);
-static int32_t  mnodeAcctActionUpdate(SSdb *pSdb, SAcctObj *pSrcAcct, SAcctObj *pDstAcct);
+static int32_t  mnodeAcctActionUpdate(SSdb *pSdb, SAcctObj *pOldAcct, SAcctObj *pNewAcct);
 static int32_t  mndProcessCreateAcctMsg(SMnodeMsg *pMnodeMsg);
 static int32_t  mndProcessAlterAcctMsg(SMnodeMsg *pMnodeMsg);
 static int32_t  mndProcessDropAcctMsg(SMnodeMsg *pMnodeMsg);
@@ -65,7 +65,7 @@ static int32_t mnodeCreateDefaultAcct(SMnode *pMnode) {
   if (pRaw == NULL) return -1;
   sdbSetRawStatus(pRaw, SDB_STATUS_READY);
 
-  mTrace("acct:%s, will be created while deploy sdb", acctObj.acct);
+  mDebug("acct:%s, will be created while deploy sdb", acctObj.acct);
   return sdbWrite(pMnode->pSdb, pRaw);
 }
 
@@ -131,15 +131,15 @@ static int32_t mnodeAcctActionDelete(SSdb *pSdb, SAcctObj *pAcct) {
   return 0;
 }
 
-static int32_t mnodeAcctActionUpdate(SSdb *pSdb, SAcctObj *pSrcAcct, SAcctObj *pDstAcct) {
-  mTrace("acct:%s, perform update action", pSrcAcct->acct);
+static int32_t mnodeAcctActionUpdate(SSdb *pSdb, SAcctObj *pOldAcct, SAcctObj *pNewAcct) {
+  mTrace("acct:%s, perform update action", pOldAcct->acct);
 
-  memcpy(pSrcAcct->acct, pDstAcct->acct, TSDB_USER_LEN);
-  pSrcAcct->createdTime = pDstAcct->createdTime;
-  pSrcAcct->updateTime = pDstAcct->updateTime;
-  pSrcAcct->acctId = pDstAcct->acctId;
-  pSrcAcct->status = pDstAcct->status;
-  pSrcAcct->cfg = pDstAcct->cfg;
+  memcpy(pOldAcct->acct, pNewAcct->acct, TSDB_USER_LEN);
+  pOldAcct->createdTime = pNewAcct->createdTime;
+  pOldAcct->updateTime = pNewAcct->updateTime;
+  pOldAcct->acctId = pNewAcct->acctId;
+  pOldAcct->status = pNewAcct->status;
+  pOldAcct->cfg = pNewAcct->cfg;
   return 0;
 }
 

source/dnode/mnode/impl/src/mndCluster.c

@@ -24,7 +24,7 @@ static SSdbRaw *mndClusterActionEncode(SClusterObj *pCluster);
 static SSdbRow *mndClusterActionDecode(SSdbRaw *pRaw);
 static int32_t  mndClusterActionInsert(SSdb *pSdb, SClusterObj *pCluster);
 static int32_t  mndClusterActionDelete(SSdb *pSdb, SClusterObj *pCluster);
-static int32_t  mndClusterActionUpdate(SSdb *pSdb, SClusterObj *pSrcCluster, SClusterObj *pDstCluster);
+static int32_t  mndClusterActionUpdate(SSdb *pSdb, SClusterObj *pOldCluster, SClusterObj *pNewCluster);
 static int32_t  mndCreateDefaultCluster(SMnode *pMnode);
 static int32_t  mndGetClusterMeta(SMnodeMsg *pMsg, SShowObj *pShow, STableMetaMsg *pMeta);
 static int32_t  mndRetrieveClusters(SMnodeMsg *pMsg, SShowObj *pShow, char *data, int32_t rows);
@@ -107,8 +107,8 @@ static int32_t mndClusterActionDelete(SSdb *pSdb, SClusterObj *pCluster) {
   return 0;
 }
 
-static int32_t mndClusterActionUpdate(SSdb *pSdb, SClusterObj *pSrcCluster, SClusterObj *pDstCluster) {
-  mTrace("cluster:%d, perform update action", pSrcCluster->id);
+static int32_t mndClusterActionUpdate(SSdb *pSdb, SClusterObj *pOldCluster, SClusterObj *pNewCluster) {
+  mTrace("cluster:%d, perform update action", pOldCluster->id);
   return 0;
 }
 
@@ -132,13 +132,13 @@ static int32_t mndCreateDefaultCluster(SMnode *pMnode) {
   if (pRaw == NULL) return -1;
   sdbSetRawStatus(pRaw, SDB_STATUS_READY);
 
-  mTrace("cluster:%d, will be created while deploy sdb", clusterObj.id);
+  mDebug("cluster:%d, will be created while deploy sdb", clusterObj.id);
   return sdbWrite(pMnode->pSdb, pRaw);
 }
 
 static int32_t mndGetClusterMeta(SMnodeMsg *pMsg, SShowObj *pShow, STableMetaMsg *pMeta) {
   int32_t  cols = 0;
-  SSchema *pSchema = pMeta->schema;
+  SSchema *pSchema = pMeta->pSchema;
 
   pShow->bytes[cols] = 4;
   pSchema[cols].type = TSDB_DATA_TYPE_INT;

source/dnode/mnode/impl/src/mndDb.c

@@ -15,16 +15,146 @@
 
 #define _DEFAULT_SOURCE
 #include "mndDb.h"
+#include "mndDnode.h"
+#include "mndMnode.h"
+#include "mndShow.h"
+#include "mndTrans.h"
+#include "mndUser.h"
 
-static int32_t mnodeProcessUseMsg(SMnodeMsg *pMsg);
+#define TSDB_DB_VER_NUM 1
+#define TSDB_DB_RESERVE_SIZE 64
+
+static SSdbRaw *mndDbActionEncode(SDbObj *pDb);
+static SSdbRow *mndDbActionDecode(SSdbRaw *pRaw);
+static int32_t  mndDbActionInsert(SSdb *pSdb, SDbObj *pDb);
+static int32_t  mndDbActionDelete(SSdb *pSdb, SDbObj *pDb);
+static int32_t  mndDbActionUpdate(SSdb *pSdb, SDbObj *pOldDb, SDbObj *pNewDb);
+static int32_t  mndProcessCreateDbMsg(SMnodeMsg *pMsg);
+static int32_t  mndProcessAlterDbMsg(SMnodeMsg *pMsg);
+static int32_t  mndProcessDropDbMsg(SMnodeMsg *pMsg);
+static int32_t  mndProcessUseDbMsg(SMnodeMsg *pMsg);
+static int32_t  mndProcessSyncDbMsg(SMnodeMsg *pMsg);
+static int32_t  mndProcessCompactDbMsg(SMnodeMsg *pMsg);
+static int32_t  mndGetDbMeta(SMnodeMsg *pMsg, SShowObj *pShow, STableMetaMsg *pMeta);
+static int32_t  mndRetrieveDbs(SMnodeMsg *pMsg, SShowObj *pShow, char *data, int32_t rows);
+static void     mndCancelGetNextDb(SMnode *pMnode, void *pIter);
 
 int32_t mndInitDb(SMnode *pMnode) {
-  mndSetMsgHandle(pMnode, TSDB_MSG_TYPE_USE_DB, mnodeProcessUseMsg);
-  return 0;
+  SSdbTable table = {.sdbType = SDB_DB,
+                     .keyType = SDB_KEY_BINARY,
+                     .encodeFp = (SdbEncodeFp)mndDbActionEncode,
+                     .decodeFp = (SdbDecodeFp)mndDbActionDecode,
+                     .insertFp = (SdbInsertFp)mndDbActionInsert,
+                     .updateFp = (SdbUpdateFp)mndDbActionUpdate,
+                     .deleteFp = (SdbDeleteFp)mndDbActionDelete};
+
+  mndSetMsgHandle(pMnode, TSDB_MSG_TYPE_CREATE_DB, mndProcessCreateDbMsg);
+  mndSetMsgHandle(pMnode, TSDB_MSG_TYPE_ALTER_DB, mndProcessAlterDbMsg);
+  mndSetMsgHandle(pMnode, TSDB_MSG_TYPE_DROP_DB, mndProcessDropDbMsg);
+  mndSetMsgHandle(pMnode, TSDB_MSG_TYPE_USE_DB, mndProcessUseDbMsg);
+  mndSetMsgHandle(pMnode, TSDB_MSG_TYPE_SYNC_DB, mndProcessSyncDbMsg);
+  mndSetMsgHandle(pMnode, TSDB_MSG_TYPE_COMPACT_DB, mndProcessCompactDbMsg);
+
+  mndAddShowMetaHandle(pMnode, TSDB_MGMT_TABLE_DB, mndGetDbMeta);
+  mndAddShowRetrieveHandle(pMnode, TSDB_MGMT_TABLE_DB, mndRetrieveDbs);
+  mndAddShowFreeIterHandle(pMnode, TSDB_MGMT_TABLE_DB, mndCancelGetNextDb);
+
+  return sdbSetTable(pMnode->pSdb, table);
 }
 
 void mndCleanupDb(SMnode *pMnode) {}
 
+static SSdbRaw *mndDbActionEncode(SDbObj *pDb) {
+  SSdbRaw *pRaw = sdbAllocRaw(SDB_DB, TSDB_DB_VER_NUM, sizeof(SDbObj));
+  if (pRaw == NULL) return NULL;
+
+  int32_t dataPos = 0;
+  SDB_SET_BINARY(pRaw, dataPos, pDb->name, TSDB_FULL_DB_NAME_LEN)
+  SDB_SET_BINARY(pRaw, dataPos, pDb->acct, TSDB_USER_LEN)
+  SDB_SET_INT64(pRaw, dataPos, pDb->createdTime)
+  SDB_SET_INT64(pRaw, dataPos, pDb->updateTime)
+  SDB_SET_INT64(pRaw, dataPos, pDb->uid)
+  SDB_SET_INT32(pRaw, dataPos, pDb->cfg.cacheBlockSize)
+  SDB_SET_INT32(pRaw, dataPos, pDb->cfg.totalBlocks)
+  SDB_SET_INT32(pRaw, dataPos, pDb->cfg.daysPerFile)
+  SDB_SET_INT32(pRaw, dataPos, pDb->cfg.daysToKeep0)
+  SDB_SET_INT32(pRaw, dataPos, pDb->cfg.daysToKeep1)
+  SDB_SET_INT32(pRaw, dataPos, pDb->cfg.daysToKeep2)
+  SDB_SET_INT32(pRaw, dataPos, pDb->cfg.minRowsPerFileBlock)
+  SDB_SET_INT32(pRaw, dataPos, pDb->cfg.maxRowsPerFileBlock)
+  SDB_SET_INT32(pRaw, dataPos, pDb->cfg.commitTime)
+  SDB_SET_INT32(pRaw, dataPos, pDb->cfg.fsyncPeriod)
+  SDB_SET_INT8(pRaw, dataPos, pDb->cfg.walLevel)
+  SDB_SET_INT8(pRaw, dataPos, pDb->cfg.precision)
+  SDB_SET_INT8(pRaw, dataPos, pDb->cfg.compression)
+  SDB_SET_INT8(pRaw, dataPos, pDb->cfg.replications)
+  SDB_SET_INT8(pRaw, dataPos, pDb->cfg.quorum)
+  SDB_SET_INT8(pRaw, dataPos, pDb->cfg.update)
+  SDB_SET_INT8(pRaw, dataPos, pDb->cfg.cacheLastRow)
+  SDB_SET_RESERVE(pRaw, dataPos, TSDB_DB_RESERVE_SIZE)
+  SDB_SET_DATALEN(pRaw, dataPos);
+
+  return pRaw;
+}
+
+static SSdbRow *mndDbActionDecode(SSdbRaw *pRaw) {
+  int8_t sver = 0;
+  if (sdbGetRawSoftVer(pRaw, &sver) != 0) return NULL;
+
+  if (sver != TSDB_DB_VER_NUM) {
+    mError("failed to decode db since %s", terrstr());
+    terrno = TSDB_CODE_SDB_INVALID_DATA_VER;
+    return NULL;
+  }
+
+  SSdbRow *pRow = sdbAllocRow(sizeof(SDbObj));
+  SDbObj  *pDb = sdbGetRowObj(pRow);
+  if (pDb == NULL) return NULL;
+
+  int32_t dataPos = 0;
+  SDB_GET_BINARY(pRaw, pRow, dataPos, pDb->name, TSDB_FULL_DB_NAME_LEN)
+  SDB_GET_BINARY(pRaw, pRow, dataPos, pDb->acct, TSDB_USER_LEN)
+  SDB_GET_INT64(pRaw, pRow, dataPos, &pDb->createdTime)
+  SDB_GET_INT64(pRaw, pRow, dataPos, &pDb->updateTime)
+  SDB_GET_INT64(pRaw, pRow, dataPos, &pDb->uid)
+  SDB_GET_INT32(pRaw, pRow, dataPos, &pDb->cfg.cacheBlockSize)
+  SDB_GET_INT32(pRaw, pRow, dataPos, &pDb->cfg.totalBlocks)
+  SDB_GET_INT32(pRaw, pRow, dataPos, &pDb->cfg.daysPerFile)
+  SDB_GET_INT32(pRaw, pRow, dataPos, &pDb->cfg.daysToKeep0)
+  SDB_GET_INT32(pRaw, pRow, dataPos, &pDb->cfg.daysToKeep1)
+  SDB_GET_INT32(pRaw, pRow, dataPos, &pDb->cfg.daysToKeep2)
+  SDB_GET_INT32(pRaw, pRow, dataPos, &pDb->cfg.minRowsPerFileBlock)
+  SDB_GET_INT32(pRaw, pRow, dataPos, &pDb->cfg.maxRowsPerFileBlock)
+  SDB_GET_INT32(pRaw, pRow, dataPos, &pDb->cfg.commitTime)
+  SDB_GET_INT32(pRaw, pRow, dataPos, &pDb->cfg.fsyncPeriod)
+  SDB_GET_INT8(pRaw, pRow, dataPos, &pDb->cfg.walLevel)
+  SDB_GET_INT8(pRaw, pRow, dataPos, &pDb->cfg.precision)
+  SDB_GET_INT8(pRaw, pRow, dataPos, &pDb->cfg.compression)
+  SDB_GET_INT8(pRaw, pRow, dataPos, &pDb->cfg.replications)
+  SDB_GET_INT8(pRaw, pRow, dataPos, &pDb->cfg.quorum)
+  SDB_GET_INT8(pRaw, pRow, dataPos, &pDb->cfg.update)
+  SDB_GET_INT8(pRaw, pRow, dataPos, &pDb->cfg.cacheLastRow)
+  SDB_GET_RESERVE(pRaw, pRow, dataPos, TSDB_DB_RESERVE_SIZE)
+
+  return pRow;
+}
+
+static int32_t mndDbActionInsert(SSdb *pSdb, SDbObj *pDb) {
+  mTrace("db:%s, perform insert action", pDb->name);
+  return 0;
+}
+
+static int32_t mndDbActionDelete(SSdb *pSdb, SDbObj *pDb) {
+  mTrace("db:%s, perform delete action", pDb->name);
+  return 0;
+}
+
+static int32_t mndDbActionUpdate(SSdb *pSdb, SDbObj *pOldDb, SDbObj *pNewDb) {
+  mTrace("db:%s, perform update action", pOldDb->name);
+  memcpy(pOldDb, pNewDb, sizeof(SDbObj));
+  return 0;
+}
+
 SDbObj *mndAcquireDb(SMnode *pMnode, char *db) {
   SSdb *pSdb = pMnode->pSdb;
   return sdbAcquire(pSdb, SDB_DB, db);
@@ -35,14 +165,459 @@ void mndReleaseDb(SMnode *pMnode, SDbObj *pDb) {
   sdbRelease(pSdb, pDb);
 }
 
-static int32_t mnodeProcessUseMsg(SMnodeMsg *pMsg) {
+static int32_t mndCheckDbCfg(SMnode *pMnode, SDbCfg *pCfg) {
+  if (pCfg->cacheBlockSize < TSDB_MIN_CACHE_BLOCK_SIZE || pCfg->cacheBlockSize > TSDB_MAX_CACHE_BLOCK_SIZE) {
+    terrno = TSDB_CODE_MND_INVALID_DB_CACHE_SIZE;
+    return -1;
+  }
+
+  if (pCfg->totalBlocks < TSDB_MIN_TOTAL_BLOCKS || pCfg->totalBlocks > TSDB_MAX_TOTAL_BLOCKS) {
+    terrno = TSDB_CODE_MND_INVALID_DB_TOTAL_BLOCKS;
+    return -1;
+  }
+
+  if (pCfg->daysPerFile < TSDB_MIN_DAYS_PER_FILE || pCfg->daysPerFile > TSDB_MAX_DAYS_PER_FILE) {
+    terrno = TSDB_CODE_MND_INVALID_DB_DAYS;
+    return -1;
+  }
+
+  if (pCfg->daysToKeep0 < pCfg->daysPerFile) {
+    terrno = TSDB_CODE_MND_INVALID_DB_KEEP0;
+    return -1;
+  }
+
+  if (pCfg->daysToKeep0 < TSDB_MIN_KEEP || pCfg->daysToKeep0 > TSDB_MAX_KEEP || pCfg->daysToKeep0 > pCfg->daysToKeep1) {
+    terrno = TSDB_CODE_MND_INVALID_DB_KEEP0;
+    return -1;
+  }
+
+  if (pCfg->daysToKeep1 < TSDB_MIN_KEEP || pCfg->daysToKeep1 > TSDB_MAX_KEEP || pCfg->daysToKeep1 > pCfg->daysToKeep2) {
+    terrno = TSDB_CODE_MND_INVALID_DB_KEEP1;
+    return -1;
+  }
+
+  if (pCfg->daysToKeep2 < TSDB_MIN_KEEP || pCfg->daysToKeep2 > TSDB_MAX_KEEP) {
+    terrno = TSDB_CODE_MND_INVALID_DB_KEEP1;
+    return -1;
+  }
+
+  if (pCfg->minRowsPerFileBlock < TSDB_MIN_MIN_ROW_FBLOCK || pCfg->minRowsPerFileBlock > TSDB_MAX_MIN_ROW_FBLOCK) {
+    terrno = TSDB_CODE_MND_INVALID_DB_MIN_ROWS;
+    return -1;
+  }
+
+  if (pCfg->maxRowsPerFileBlock < TSDB_MIN_MAX_ROW_FBLOCK || pCfg->maxRowsPerFileBlock > TSDB_MAX_MAX_ROW_FBLOCK) {
+    terrno = TSDB_CODE_MND_INVALID_DB_MAX_ROWS;
+    return -1;
+  }
+
+  if (pCfg->minRowsPerFileBlock > pCfg->maxRowsPerFileBlock) {
+    terrno = TSDB_CODE_MND_INVALID_DB_MIN_ROWS;
+    return -1;
+  }
+
+  if (pCfg->commitTime < TSDB_MIN_COMMIT_TIME || pCfg->commitTime > TSDB_MAX_COMMIT_TIME) {
+    terrno = TSDB_CODE_MND_INVALID_DB_COMMIT_TIME;
+    return -1;
+  }
+
+  if (pCfg->fsyncPeriod < TSDB_MIN_FSYNC_PERIOD || pCfg->fsyncPeriod > TSDB_MAX_FSYNC_PERIOD) {
+    terrno = TSDB_CODE_MND_INVALID_DB_FSYNC_PERIOD;
+    return -1;
+  }
+
+  if (pCfg->walLevel < TSDB_MIN_WAL_LEVEL || pCfg->walLevel > TSDB_MAX_WAL_LEVEL) {
+    terrno = TSDB_CODE_MND_INVALID_DB_WAL_LEVEL;
+    return -1;
+  }
+
+  if (pCfg->precision < TSDB_MIN_PRECISION && pCfg->precision > TSDB_MAX_PRECISION) {
+    terrno = TSDB_CODE_MND_INVALID_DB_PRECISION;
+    return -1;
+  }
+
+  if (pCfg->compression < TSDB_MIN_COMP_LEVEL || pCfg->compression > TSDB_MAX_COMP_LEVEL) {
+    terrno = TSDB_CODE_MND_INVALID_DB_COMP;
+    return -1;
+  }
+
+  if (pCfg->replications < TSDB_MIN_DB_REPLICA_OPTION || pCfg->replications > TSDB_MAX_DB_REPLICA_OPTION) {
+    terrno = TSDB_CODE_MND_INVALID_DB_REPLICA;
+    return -1;
+  }
+
+  if (pCfg->replications > mndGetDnodeSize(pMnode)) {
+    terrno = TSDB_CODE_MND_INVALID_DB_REPLICA;
+    return -1;
+  }
+
+  if (pCfg->quorum < TSDB_MIN_DB_QUORUM_OPTION || pCfg->quorum > TSDB_MAX_DB_QUORUM_OPTION) {
+    terrno = TSDB_CODE_MND_INVALID_DB_QUORUM;
+    return -1;
+  }
+
+  if (pCfg->quorum > pCfg->replications) {
+    terrno = TSDB_CODE_MND_INVALID_DB_QUORUM;
+    return -1;
+  }
+
+  if (pCfg->update < TSDB_MIN_DB_UPDATE || pCfg->update > TSDB_MAX_DB_UPDATE) {
+    terrno = TSDB_CODE_MND_INVALID_DB_UPDATE;
+    return -1;
+  }
+
+  if (pCfg->cacheLastRow < TSDB_MIN_DB_CACHE_LAST_ROW || pCfg->cacheLastRow > TSDB_MAX_DB_CACHE_LAST_ROW) {
+    terrno = TSDB_CODE_MND_INVALID_DB_CACHE_LAST;
+    return -1;
+  }
+
+  return TSDB_CODE_SUCCESS;
+}
+
+static void mndSetDefaultDbCfg(SDbCfg *pCfg) {
+  if (pCfg->cacheBlockSize < 0) pCfg->cacheBlockSize = TSDB_DEFAULT_CACHE_BLOCK_SIZE;
+  if (pCfg->totalBlocks < 0) pCfg->totalBlocks = TSDB_DEFAULT_TOTAL_BLOCKS;
+  if (pCfg->daysPerFile < 0) pCfg->daysPerFile = TSDB_DEFAULT_DAYS_PER_FILE;
+  if (pCfg->daysToKeep0 < 0) pCfg->daysToKeep0 = TSDB_DEFAULT_KEEP;
+  if (pCfg->daysToKeep1 < 0) pCfg->daysToKeep1 = TSDB_DEFAULT_KEEP;
+  if (pCfg->daysToKeep2 < 0) pCfg->daysToKeep2 = TSDB_DEFAULT_KEEP;
+  if (pCfg->minRowsPerFileBlock < 0) pCfg->minRowsPerFileBlock = TSDB_DEFAULT_MIN_ROW_FBLOCK;
+  if (pCfg->maxRowsPerFileBlock < 0) pCfg->maxRowsPerFileBlock = TSDB_DEFAULT_MAX_ROW_FBLOCK;
+  if (pCfg->commitTime < 0) pCfg->commitTime = TSDB_DEFAULT_COMMIT_TIME;
+  if (pCfg->fsyncPeriod < 0) pCfg->fsyncPeriod = TSDB_DEFAULT_FSYNC_PERIOD;
+  if (pCfg->walLevel < 0) pCfg->walLevel = TSDB_DEFAULT_WAL_LEVEL;
+  if (pCfg->precision < 0) pCfg->precision = TSDB_DEFAULT_PRECISION;
+  if (pCfg->compression < 0) pCfg->compression = TSDB_DEFAULT_COMP_LEVEL;
+  if (pCfg->replications < 0) pCfg->replications = TSDB_DEFAULT_DB_REPLICA_OPTION;
+  if (pCfg->quorum < 0) pCfg->quorum = TSDB_DEFAULT_DB_QUORUM_OPTION;
+  if (pCfg->update < 0) pCfg->update = TSDB_DEFAULT_DB_UPDATE_OPTION;
+  if (pCfg->cacheLastRow < 0) pCfg->cacheLastRow = TSDB_DEFAULT_CACHE_LAST_ROW;
+}
+
+static int32_t mndCreateDb(SMnode *pMnode, SMnodeMsg *pMsg, SCreateDbMsg *pCreate, char *acct) {
+  SDbObj dbObj = {0};
+  tstrncpy(dbObj.name, pCreate->db, TSDB_FULL_DB_NAME_LEN);
+  tstrncpy(dbObj.acct, acct, TSDB_USER_LEN);
+  dbObj.createdTime = taosGetTimestampMs();
+  dbObj.updateTime = dbObj.createdTime;
+  dbObj.uid = 1234;
+  dbObj.cfg = (SDbCfg){.cacheBlockSize = pCreate->cacheBlockSize,
+                       .totalBlocks = pCreate->totalBlocks,
+                       .daysPerFile = pCreate->daysPerFile,
+                       .daysToKeep0 = pCreate->daysToKeep0,
+                       .daysToKeep1 = pCreate->daysToKeep1,
+                       .daysToKeep2 = pCreate->daysToKeep2,
+                       .minRowsPerFileBlock = pCreate->minRowsPerFileBlock,
+                       .maxRowsPerFileBlock = pCreate->maxRowsPerFileBlock,
+                       .fsyncPeriod = pCreate->fsyncPeriod,
+                       .commitTime = pCreate->commitTime,
+                       .precision = pCreate->precision,
+                       .compression = pCreate->compression,
+                       .walLevel = pCreate->walLevel,
+                       .replications = pCreate->replications,
+                       .quorum = pCreate->quorum,
+                       .update = pCreate->update,
+                       .cacheLastRow = pCreate->cacheLastRow};
+
+  mndSetDefaultDbCfg(&dbObj.cfg);
+
+  if (mndCheckDbCfg(pMnode, &dbObj.cfg) != 0) {
+    mError("db:%s, failed to create since %s", pCreate->db, terrstr());
+    return -1;
+  }
+
+  STrans *pTrans = mndTransCreate(pMnode, TRN_POLICY_ROLLBACK, pMsg->rpcMsg.handle);
+  if (pTrans == NULL) {
+    mError("db:%s, failed to create since %s", pCreate->db, terrstr());
+    return -1;
+  }
+  mDebug("trans:%d, used to create db:%s", pTrans->id, pCreate->db);
+
+  SSdbRaw *pRedoRaw = mndDbActionEncode(&dbObj);
+  if (pRedoRaw == NULL || mndTransAppendRedolog(pTrans, pRedoRaw) != 0) {
+    mError("trans:%d, failed to append redo log since %s", pTrans->id, terrstr());
+    mndTransDrop(pTrans);
+    return -1;
+  }
+  sdbSetRawStatus(pRedoRaw, SDB_STATUS_CREATING);
+
+  SSdbRaw *pUndoRaw = mndDbActionEncode(&dbObj);
+  if (pUndoRaw == NULL || mndTransAppendUndolog(pTrans, pUndoRaw) != 0) {
+    mError("trans:%d, failed to append undo log since %s", pTrans->id, terrstr());
+    mndTransDrop(pTrans);
+    return -1;
+  }
+  sdbSetRawStatus(pUndoRaw, SDB_STATUS_DROPPED);
+
+  SSdbRaw *pCommitRaw = mndDbActionEncode(&dbObj);
+  if (pCommitRaw == NULL || mndTransAppendCommitlog(pTrans, pCommitRaw) != 0) {
+    mError("trans:%d, failed to append commit log since %s", pTrans->id, terrstr());
+    mndTransDrop(pTrans);
+    return -1;
+  }
+  sdbSetRawStatus(pCommitRaw, SDB_STATUS_READY);
+
+  if (mndTransPrepare(pTrans) != 0) {
+    mError("trans:%d, failed to prepare since %s", pTrans->id, terrstr());
+    mndTransDrop(pTrans);
+    return -1;
+  }
+
+  mndTransDrop(pTrans);
+  return 0;
+}
+
+static int32_t mndProcessCreateDbMsg(SMnodeMsg *pMsg) {
+  SMnode       *pMnode = pMsg->pMnode;
+  SCreateDbMsg *pCreate = pMsg->rpcMsg.pCont;
+
+  pCreate->cacheBlockSize = htonl(pCreate->cacheBlockSize);
+  pCreate->totalBlocks = htonl(pCreate->totalBlocks);
+  pCreate->daysPerFile = htonl(pCreate->daysPerFile);
+  pCreate->daysToKeep0 = htonl(pCreate->daysToKeep0);
+  pCreate->daysToKeep1 = htonl(pCreate->daysToKeep1);
+  pCreate->daysToKeep2 = htonl(pCreate->daysToKeep2);
+  pCreate->minRowsPerFileBlock = htonl(pCreate->minRowsPerFileBlock);
+  pCreate->maxRowsPerFileBlock = htonl(pCreate->maxRowsPerFileBlock);
+  pCreate->commitTime = htonl(pCreate->commitTime);
+  pCreate->fsyncPeriod = htonl(pCreate->fsyncPeriod);
+
+  mDebug("db:%s, start to create", pCreate->db);
+
+  SDbObj *pDb = mndAcquireDb(pMnode, pCreate->db);
+  if (pDb != NULL) {
+    sdbRelease(pMnode->pSdb, pDb);
+    if (pCreate->ignoreExist) {
+      mDebug("db:%s, already exist, ignore exist is set", pCreate->db);
+      return 0;
+    } else {
+      terrno = TSDB_CODE_MND_DB_ALREADY_EXIST;
+      mError("db:%s, failed to create since %s", pCreate->db, terrstr());
+      return -1;
+    }
+  }
+
+  SUserObj *pOperUser = mndAcquireUser(pMnode, pMsg->user);
+  if (pOperUser == NULL) {
+    mError("db:%s, failed to create since %s", pCreate->db, terrstr());
+    return -1;
+  }
+
+  int32_t code = mndCreateDb(pMnode, pMsg, pCreate, pOperUser->acct);
+  mndReleaseUser(pMnode, pOperUser);
+
+  if (code != 0) {
+    terrno = code;
+    mError("db:%s, failed to create since %s", pCreate->db, terrstr());
+    return -1;
+  }
+
+  return TSDB_CODE_MND_ACTION_IN_PROGRESS;
+}
+
+static int32_t mnodeSetDbCfgFromAlterDbMsg(SDbObj *pDb, SAlterDbMsg *pAlter) {
+  bool changed = false;
+
+  if (pAlter->totalBlocks >= 0 && pAlter->totalBlocks != pDb->cfg.totalBlocks) {
+    pDb->cfg.totalBlocks = pAlter->totalBlocks;
+    changed = true;
+  }
+
+  if (pAlter->daysToKeep0 >= 0 && pAlter->daysToKeep0 != pDb->cfg.daysToKeep0) {
+    pDb->cfg.daysToKeep0 = pAlter->daysToKeep0;
+    changed = true;
+  }
+
+  if (pAlter->daysToKeep1 >= 0 && pAlter->daysToKeep1 != pDb->cfg.daysToKeep1) {
+    pDb->cfg.daysToKeep1 = pAlter->daysToKeep1;
+    changed = true;
+  }
+
+  if (pAlter->daysToKeep2 >= 0 && pAlter->daysToKeep2 != pDb->cfg.daysToKeep2) {
+    pDb->cfg.daysToKeep2 = pAlter->daysToKeep2;
+    changed = true;
+  }
+
+  if (pAlter->fsyncPeriod >= 0 && pAlter->fsyncPeriod != pDb->cfg.fsyncPeriod) {
+    pDb->cfg.fsyncPeriod = pAlter->fsyncPeriod;
+    changed = true;
+  }
+
+  if (pAlter->walLevel >= 0 && pAlter->walLevel != pDb->cfg.walLevel) {
+    pDb->cfg.walLevel = pAlter->walLevel;
+    changed = true;
+  }
+
+  if (pAlter->quorum >= 0 && pAlter->quorum != pDb->cfg.quorum) {
+    pDb->cfg.quorum = pAlter->quorum;
+    changed = true;
+  }
+
+  if (pAlter->cacheLastRow >= 0 && pAlter->cacheLastRow != pDb->cfg.cacheLastRow) {
+    pDb->cfg.cacheLastRow = pAlter->cacheLastRow;
+    changed = true;
+  }
+
+  if (!changed) {
+    terrno = TSDB_CODE_MND_DB_OPTION_UNCHANGED;
+    return -1;
+  }
+
+  return 0;
+}
+
+static int32_t mndUpdateDb(SMnode *pMnode, SMnodeMsg *pMsg, SDbObj *pOldDb, SDbObj *pNewDb) {
+  STrans *pTrans = mndTransCreate(pMnode, TRN_POLICY_ROLLBACK, pMsg->rpcMsg.handle);
+  if (pTrans == NULL) {
+    mError("db:%s, failed to update since %s", pOldDb->name, terrstr());
+    return terrno;
+  }
+
+  mDebug("trans:%d, used to update db:%s", pTrans->id, pOldDb->name);
+
+  SSdbRaw *pRedoRaw = mndDbActionEncode(pNewDb);
+  if (pRedoRaw == NULL || mndTransAppendRedolog(pTrans, pRedoRaw) != 0) {
+    mError("trans:%d, failed to append redo log since %s", pTrans->id, terrstr());
+    mndTransDrop(pTrans);
+    return -1;
+  }
+  sdbSetRawStatus(pRedoRaw, SDB_STATUS_READY);
+
+  SSdbRaw *pUndoRaw = mndDbActionEncode(pOldDb);
+  if (pUndoRaw == NULL || mndTransAppendUndolog(pTrans, pUndoRaw) != 0) {
+    mError("trans:%d, failed to append undo log since %s", pTrans->id, terrstr());
+    mndTransDrop(pTrans);
+    return -1;
+  }
+  sdbSetRawStatus(pUndoRaw, SDB_STATUS_READY);
+
+  if (mndTransPrepare(pTrans) != 0) {
+    mError("trans:%d, failed to prepare since %s", pTrans->id, terrstr());
+    mndTransDrop(pTrans);
+    return -1;
+  }
+
+  mndTransDrop(pTrans);
+  return 0;
+}
+
+static int32_t mndProcessAlterDbMsg(SMnodeMsg *pMsg) {
+  SMnode      *pMnode = pMsg->pMnode;
+  SAlterDbMsg *pAlter = pMsg->rpcMsg.pCont;
+  pAlter->totalBlocks = htonl(pAlter->totalBlocks);
+  pAlter->daysToKeep0 = htonl(pAlter->daysToKeep0);
+  pAlter->daysToKeep1 = htonl(pAlter->daysToKeep1);
+  pAlter->daysToKeep2 = htonl(pAlter->daysToKeep2);
+  pAlter->fsyncPeriod = htonl(pAlter->fsyncPeriod);
+
+  mDebug("db:%s, start to alter", pAlter->db);
+
+  SDbObj *pDb = mndAcquireDb(pMnode, pAlter->db);
+  if (pDb == NULL) {
+    mError("db:%s, failed to alter since %s", pAlter->db, terrstr());
+    return TSDB_CODE_MND_DB_NOT_EXIST;
+  }
+
+  SDbObj dbObj = {0};
+  memcpy(&dbObj, pDb, sizeof(SDbObj));
+
+  int32_t code = mnodeSetDbCfgFromAlterDbMsg(&dbObj, pAlter);
+  if (code != 0) {
+    mndReleaseDb(pMnode, pDb);
+    mError("db:%s, failed to alter since %s", pAlter->db, tstrerror(code));
+    return code;
+  }
+
+  code = mndUpdateDb(pMnode, pMsg, pDb, &dbObj);
+  mndReleaseDb(pMnode, pDb);
+
+  if (code != 0) {
+    mError("db:%s, failed to alter since %s", pAlter->db, tstrerror(code));
+    return code;
+  }
+
+  return TSDB_CODE_MND_ACTION_IN_PROGRESS;
+}
+
+static int32_t mndDropDb(SMnode *pMnode, SMnodeMsg *pMsg, SDbObj *pDb) {
+  STrans *pTrans = mndTransCreate(pMnode, TRN_POLICY_ROLLBACK, pMsg->rpcMsg.handle);
+  if (pTrans == NULL) {
+    mError("db:%s, failed to drop since %s", pDb->name, terrstr());
+    return -1;
+  }
+  mDebug("trans:%d, used to drop db:%s", pTrans->id, pDb->name);
+
+  SSdbRaw *pRedoRaw = mndDbActionEncode(pDb);
+  if (pRedoRaw == NULL || mndTransAppendRedolog(pTrans, pRedoRaw) != 0) {
+    mError("trans:%d, failed to append redo log since %s", pTrans->id, terrstr());
+    mndTransDrop(pTrans);
+    return -1;
+  }
+  sdbSetRawStatus(pRedoRaw, SDB_STATUS_DROPPING);
+
+  SSdbRaw *pUndoRaw = mndDbActionEncode(pDb);
+  if (pUndoRaw == NULL || mndTransAppendUndolog(pTrans, pUndoRaw) != 0) {
+    mError("trans:%d, failed to append undo log since %s", pTrans->id, terrstr());
+    mndTransDrop(pTrans);
+    return -1;
+  }
+  sdbSetRawStatus(pUndoRaw, SDB_STATUS_READY);
+
+  SSdbRaw *pCommitRaw = mndDbActionEncode(pDb);
+  if (pCommitRaw == NULL || mndTransAppendCommitlog(pTrans, pCommitRaw) != 0) {
+    mError("trans:%d, failed to append commit log since %s", pTrans->id, terrstr());
+    mndTransDrop(pTrans);
+    return -1;
+  }
+  sdbSetRawStatus(pCommitRaw, SDB_STATUS_DROPPED);
+
+  if (mndTransPrepare(pTrans) != 0) {
+    mError("trans:%d, failed to prepare since %s", pTrans->id, terrstr());
+    mndTransDrop(pTrans);
+    return -1;
+  }
+
+  mndTransDrop(pTrans);
+  return 0;
+}
+
+static int32_t mndProcessDropDbMsg(SMnodeMsg *pMsg) {
+  SMnode     *pMnode = pMsg->pMnode;
+  SDropDbMsg *pDrop = pMsg->rpcMsg.pCont;
+
+  mDebug("db:%s, start to drop", pDrop->db);
+
+  SDbObj *pDb = mndAcquireDb(pMnode, pDrop->db);
+  if (pDb == NULL) {
+    if (pDrop->ignoreNotExists) {
+      mDebug("db:%s, not exist, ignore not exist is set", pDrop->db);
+      return TSDB_CODE_SUCCESS;
+    } else {
+      terrno = TSDB_CODE_MND_DB_NOT_EXIST;
+      mError("db:%s, failed to drop since %s", pDrop->db, terrstr());
+      return -1;
+    }
+  }
+
+  int32_t code = mndDropDb(pMnode, pMsg, pDb);
+  mndReleaseDb(pMnode, pDb);
+
+  if (code != 0) {
+    terrno = code;
+    mError("db:%s, failed to drop since %s", pDrop->db, terrstr());
+    return code;
+  }
+
+  return TSDB_CODE_MND_ACTION_IN_PROGRESS;
+}
+
+static int32_t mndProcessUseDbMsg(SMnodeMsg *pMsg) {
   SMnode    *pMnode = pMsg->pMnode;
   SUseDbMsg *pUse = pMsg->rpcMsg.pCont;
 
-  strncpy(pMsg->db, pUse->db, TSDB_FULL_DB_NAME_LEN);
-
   SDbObj *pDb = mndAcquireDb(pMnode, pMsg->db);
   if (pDb != NULL) {
+    strncpy(pMsg->db, pUse->db, TSDB_FULL_DB_NAME_LEN);
     mndReleaseDb(pMnode, pDb);
     return 0;
   } else {
@@ -50,3 +625,275 @@ static int32_t mnodeProcessUseMsg(SMnodeMsg *pMsg) {
     return -1;
   }
 }
+
+static int32_t mndProcessSyncDbMsg(SMnodeMsg *pMsg) {
+  SMnode     *pMnode = pMsg->pMnode;
+  SSyncDbMsg *pSync = pMsg->rpcMsg.pCont;
+
+  SDbObj *pDb = mndAcquireDb(pMnode, pMsg->db);
+  if (pDb == NULL) {
+    mError("db:%s, failed to process sync db msg since %s", pMsg->db, terrstr());
+    return -1;
+  } else {
+    mndReleaseDb(pMnode, pDb);
+    return 0;
+  }
+}
+
+static int32_t mndProcessCompactDbMsg(SMnodeMsg *pMsg) {
+  SMnode        *pMnode = pMsg->pMnode;
+  SCompactDbMsg *pCompact = pMsg->rpcMsg.pCont;
+
+  SDbObj *pDb = mndAcquireDb(pMnode, pMsg->db);
+  if (pDb == NULL) {
+    mError("db:%s, failed to process compact db msg since %s", pMsg->db, terrstr());
+    return -1;
+  } else {
+    mndReleaseDb(pMnode, pDb);
+    return 0;
+  }
+}
+
+static int32_t mndGetDbMeta(SMnodeMsg *pMsg, SShowObj *pShow, STableMetaMsg *pMeta) {
+  SMnode *pMnode = pMsg->pMnode;
+  SSdb   *pSdb = pMnode->pSdb;
+
+  int32_t  cols = 0;
+  SSchema *pSchema = pMeta->pSchema;
+
+  pShow->bytes[cols] = (TSDB_DB_NAME_LEN - 1) + VARSTR_HEADER_SIZE;
+  pSchema[cols].type = TSDB_DATA_TYPE_BINARY;
+  strcpy(pSchema[cols].name, "name");
+  pSchema[cols].bytes = htons(pShow->bytes[cols]);
+  cols++;
+
+  pShow->bytes[cols] = 8;
+  pSchema[cols].type = TSDB_DATA_TYPE_TIMESTAMP;
+  strcpy(pSchema[cols].name, "create time");
+  pSchema[cols].bytes = htons(pShow->bytes[cols]);
+  cols++;
+
+  pShow->bytes[cols] = 2;
+  pSchema[cols].type = TSDB_DATA_TYPE_SMALLINT;
+  strcpy(pSchema[cols].name, "replica");
+  pSchema[cols].bytes = htons(pShow->bytes[cols]);
+  cols++;
+
+  pShow->bytes[cols] = 2;
+  pSchema[cols].type = TSDB_DATA_TYPE_SMALLINT;
+  strcpy(pSchema[cols].name, "quorum");
+  pSchema[cols].bytes = htons(pShow->bytes[cols]);
+  cols++;
+
+  pShow->bytes[cols] = 2;
+  pSchema[cols].type = TSDB_DATA_TYPE_SMALLINT;
+  strcpy(pSchema[cols].name, "days");
+  pSchema[cols].bytes = htons(pShow->bytes[cols]);
+  cols++;
+
+  pShow->bytes[cols] = 24 + VARSTR_HEADER_SIZE;
+  pSchema[cols].type = TSDB_DATA_TYPE_BINARY;
+  strcpy(pSchema[cols].name, "keep0,keep1,keep2");
+  pSchema[cols].bytes = htons(pShow->bytes[cols]);
+  cols++;
+
+  pShow->bytes[cols] = 4;
+  pSchema[cols].type = TSDB_DATA_TYPE_INT;
+  strcpy(pSchema[cols].name, "cache(MB)");
+  pSchema[cols].bytes = htons(pShow->bytes[cols]);
+  cols++;
+
+  pShow->bytes[cols] = 4;
+  pSchema[cols].type = TSDB_DATA_TYPE_INT;
+  strcpy(pSchema[cols].name, "blocks");
+  pSchema[cols].bytes = htons(pShow->bytes[cols]);
+  cols++;
+
+  pShow->bytes[cols] = 4;
+  pSchema[cols].type = TSDB_DATA_TYPE_INT;
+  strcpy(pSchema[cols].name, "minrows");
+  pSchema[cols].bytes = htons(pShow->bytes[cols]);
+  cols++;
+
+  pShow->bytes[cols] = 4;
+  pSchema[cols].type = TSDB_DATA_TYPE_INT;
+  strcpy(pSchema[cols].name, "maxrows");
+  pSchema[cols].bytes = htons(pShow->bytes[cols]);
+  cols++;
+
+  pShow->bytes[cols] = 1;
+  pSchema[cols].type = TSDB_DATA_TYPE_TINYINT;
+  strcpy(pSchema[cols].name, "wallevel");
+  pSchema[cols].bytes = htons(pShow->bytes[cols]);
+  cols++;
+
+  pShow->bytes[cols] = 4;
+  pSchema[cols].type = TSDB_DATA_TYPE_INT;
+  strcpy(pSchema[cols].name, "fsync");
+  pSchema[cols].bytes = htons(pShow->bytes[cols]);
+  cols++;
+
+  pShow->bytes[cols] = 1;
+  pSchema[cols].type = TSDB_DATA_TYPE_TINYINT;
+  strcpy(pSchema[cols].name, "comp");
+  pSchema[cols].bytes = htons(pShow->bytes[cols]);
+  cols++;
+
+  pShow->bytes[cols] = 1;
+  pSchema[cols].type = TSDB_DATA_TYPE_TINYINT;
+  strcpy(pSchema[cols].name, "cachelast");
+  pSchema[cols].bytes = htons(pShow->bytes[cols]);
+  cols++;
+
+  pShow->bytes[cols] = 3 + VARSTR_HEADER_SIZE;
+  pSchema[cols].type = TSDB_DATA_TYPE_BINARY;
+  strcpy(pSchema[cols].name, "precision");
+  pSchema[cols].bytes = htons(pShow->bytes[cols]);
+  cols++;
+
+  pShow->bytes[cols] = 1;
+  pSchema[cols].type = TSDB_DATA_TYPE_TINYINT;
+  strcpy(pSchema[cols].name, "update");
+  pSchema[cols].bytes = htons(pShow->bytes[cols]);
+  cols++;
+
+  pMeta->numOfColumns = htons(cols);
+  pShow->numOfColumns = cols;
+
+  pShow->offset[0] = 0;
+  for (int32_t i = 1; i < cols; ++i) {
+    pShow->offset[i] = pShow->offset[i - 1] + pShow->bytes[i - 1];
+  }
+
+  pShow->numOfRows = sdbGetSize(pSdb, SDB_DB);
+  pShow->rowSize = pShow->offset[cols - 1] + pShow->bytes[cols - 1];
+  strcpy(pMeta->tableFname, mndShowStr(pShow->type));
+
+  return 0;
+}
+
+char *mnodeGetDbStr(char *src) {
+  char *pos = strstr(src, TS_PATH_DELIMITER);
+  if (pos != NULL) ++pos;
+
+  return pos;
+}
+
+static int32_t mndRetrieveDbs(SMnodeMsg *pMsg, SShowObj *pShow, char *data, int32_t rows) {
+  SMnode *pMnode = pMsg->pMnode;
+  SSdb   *pSdb = pMnode->pSdb;
+  int32_t numOfRows = 0;
+  SDbObj *pDb = NULL;
+  char   *pWrite;
+  int32_t cols = 0;
+
+  while (numOfRows < rows) {
+    pShow->pIter = sdbFetch(pSdb, SDB_DB, pShow->pIter, (void **)&pDb);
+    if (pShow->pIter == NULL) break;
+
+    cols = 0;
+
+    pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
+    char *name = mnodeGetDbStr(pDb->name);
+    if (name != NULL) {
+      STR_WITH_MAXSIZE_TO_VARSTR(pWrite, name, pShow->bytes[cols]);
+    } else {
+      STR_TO_VARSTR(pWrite, "NULL");
+    }
+    cols++;
+
+    pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
+    *(int64_t *)pWrite = pDb->createdTime;
+    cols++;
+
+    pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
+    *(int16_t *)pWrite = pDb->cfg.replications;
+    cols++;
+
+    pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
+    *(int16_t *)pWrite = pDb->cfg.quorum;
+    cols++;
+
+    pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
+    *(int16_t *)pWrite = pDb->cfg.daysPerFile;
+    cols++;
+
+    pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
+    char tmp[128] = {0};
+    if (pDb->cfg.daysToKeep0 > pDb->cfg.daysToKeep1 || pDb->cfg.daysToKeep0 > pDb->cfg.daysToKeep2) {
+      sprintf(tmp, "%d,%d,%d", pDb->cfg.daysToKeep1, pDb->cfg.daysToKeep2, pDb->cfg.daysToKeep0);
+    } else {
+      sprintf(tmp, "%d,%d,%d", pDb->cfg.daysToKeep0, pDb->cfg.daysToKeep1, pDb->cfg.daysToKeep2);
+    }
+    STR_WITH_SIZE_TO_VARSTR(pWrite, tmp, strlen(tmp));
+    cols++;
+
+    pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
+    *(int32_t *)pWrite = pDb->cfg.cacheBlockSize;
+    cols++;
+
+    pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
+    *(int32_t *)pWrite = pDb->cfg.totalBlocks;
+    cols++;
+
+    pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
+    *(int32_t *)pWrite = pDb->cfg.minRowsPerFileBlock;
+    cols++;
+
+    pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
+    *(int32_t *)pWrite = pDb->cfg.maxRowsPerFileBlock;
+    cols++;
+
+    pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
+    *(int8_t *)pWrite = pDb->cfg.walLevel;
+    cols++;
+
+    pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
+    *(int32_t *)pWrite = pDb->cfg.fsyncPeriod;
+    cols++;
+
+    pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
+    *(int8_t *)pWrite = pDb->cfg.compression;
+    cols++;
+
+    pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
+    *(int8_t *)pWrite = pDb->cfg.cacheLastRow;
+    cols++;
+
+    pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
+    char *prec = NULL;
+    switch (pDb->cfg.precision) {
+      case TSDB_TIME_PRECISION_MILLI:
+        prec = TSDB_TIME_PRECISION_MILLI_STR;
+        break;
+      case TSDB_TIME_PRECISION_MICRO:
+        prec = TSDB_TIME_PRECISION_MICRO_STR;
+        break;
+      case TSDB_TIME_PRECISION_NANO:
+        prec = TSDB_TIME_PRECISION_NANO_STR;
+        break;
+      default:
+        assert(false);
+        break;
+    }
+    STR_WITH_SIZE_TO_VARSTR(pWrite, prec, 2);
+    cols++;
+
+    pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
+    *(int8_t *)pWrite = pDb->cfg.update;
+    cols++;
+
+    numOfRows++;
+    sdbRelease(pSdb, pDb);
+  }
+
+  mnodeVacuumResult(data, pShow->numOfColumns, numOfRows, rows, pShow);
+  pShow->numOfReads += numOfRows;
+
+  return numOfRows;
+}
+
+static void mndCancelGetNextDb(SMnode *pMnode, void *pIter) {
+  SSdb *pSdb = pMnode->pSdb;
+  sdbCancelFetch(pSdb, pIter);
+}
\ No newline at end of file

source/dnode/mnode/impl/src/mndDnode.c

@@ -16,12 +16,17 @@
 #define _DEFAULT_SOURCE
 #include "mndDnode.h"
 #include "mndMnode.h"
+#include "mndShow.h"
 #include "mndTrans.h"
 #include "ttime.h"
+#include "tutil.h"
 
-#define SDB_DNODE_VER 1
+#define TSDB_DNODE_VER 1
+#define TSDB_CONFIG_OPTION_LEN 16
+#define TSDB_CONIIG_VALUE_LEN 48
+#define TSDB_CONFIG_NUMBER 8
 
-static char *offlineReason[] = {
+static const char *offlineReason[] = {
     "",
     "status msg timeout",
     "status not received",
@@ -36,8 +41,74 @@ static char *offlineReason[] = {
     "unknown",
 };
 
+static const char *dnodeStatus[] = {"offline", "ready", "creating", "dropping"};
+
+static int32_t  mndCreateDefaultDnode(SMnode *pMnode);
+static SSdbRaw *mndDnodeActionEncode(SDnodeObj *pDnode);
+static SSdbRow *mndDnodeActionDecode(SSdbRaw *pRaw);
+static int32_t  mndDnodeActionInsert(SSdb *pSdb, SDnodeObj *pDnode);
+static int32_t  mndDnodeActionDelete(SSdb *pSdb, SDnodeObj *pDnode);
+static int32_t  mndDnodeActionUpdate(SSdb *pSdb, SDnodeObj *pOldDnode, SDnodeObj *pNewDnode);
+
+static int32_t mndProcessCreateDnodeMsg(SMnodeMsg *pMsg);
+static int32_t mndProcessDropDnodeMsg(SMnodeMsg *pMsg);
+static int32_t mndProcessConfigDnodeMsg(SMnodeMsg *pMsg);
+static int32_t mndProcessConfigDnodeRsp(SMnodeMsg *pMsg);
+static int32_t mndProcessStatusMsg(SMnodeMsg *pMsg);
+
+static int32_t mndGetConfigMeta(SMnodeMsg *pMsg, SShowObj *pShow, STableMetaMsg *pMeta);
+static int32_t mndRetrieveConfigs(SMnodeMsg *pMsg, SShowObj *pShow, char *data, int32_t rows);
+static void    mndCancelGetNextConfig(SMnode *pMnode, void *pIter);
+static int32_t mndGetDnodeMeta(SMnodeMsg *pMsg, SShowObj *pShow, STableMetaMsg *pMeta);
+static int32_t mndRetrieveDnodes(SMnodeMsg *pMsg, SShowObj *pShow, char *data, int32_t rows);
+static void    mndCancelGetNextDnode(SMnode *pMnode, void *pIter);
+
+int32_t mndInitDnode(SMnode *pMnode) {
+  SSdbTable table = {.sdbType = SDB_DNODE,
+                     .keyType = SDB_KEY_INT32,
+                     .deployFp = (SdbDeployFp)mndCreateDefaultDnode,
+                     .encodeFp = (SdbEncodeFp)mndDnodeActionEncode,
+                     .decodeFp = (SdbDecodeFp)mndDnodeActionDecode,
+                     .insertFp = (SdbInsertFp)mndDnodeActionInsert,
+                     .updateFp = (SdbUpdateFp)mndDnodeActionUpdate,
+                     .deleteFp = (SdbDeleteFp)mndDnodeActionDelete};
+
+  mndSetMsgHandle(pMnode, TSDB_MSG_TYPE_CREATE_DNODE, mndProcessCreateDnodeMsg);
+  mndSetMsgHandle(pMnode, TSDB_MSG_TYPE_DROP_DNODE, mndProcessDropDnodeMsg);
+  mndSetMsgHandle(pMnode, TSDB_MSG_TYPE_CONFIG_DNODE, mndProcessConfigDnodeMsg);
+  mndSetMsgHandle(pMnode, TSDB_MSG_TYPE_CONFIG_DNODE_IN_RSP, mndProcessConfigDnodeRsp);
+  mndSetMsgHandle(pMnode, TSDB_MSG_TYPE_STATUS, mndProcessStatusMsg);
+
+  mndAddShowMetaHandle(pMnode, TSDB_MGMT_TABLE_VARIABLES, mndGetConfigMeta);
+  mndAddShowRetrieveHandle(pMnode, TSDB_MGMT_TABLE_VARIABLES, mndRetrieveConfigs);
+  mndAddShowFreeIterHandle(pMnode, TSDB_MGMT_TABLE_VARIABLES, mndCancelGetNextConfig);
+  mndAddShowMetaHandle(pMnode, TSDB_MGMT_TABLE_DNODE, mndGetDnodeMeta);
+  mndAddShowRetrieveHandle(pMnode, TSDB_MGMT_TABLE_DNODE, mndRetrieveDnodes);
+  mndAddShowFreeIterHandle(pMnode, TSDB_MGMT_TABLE_DNODE, mndCancelGetNextDnode);
+
+  return sdbSetTable(pMnode->pSdb, table);
+}
+
+void mndCleanupDnode(SMnode *pMnode) {}
+
+static int32_t mndCreateDefaultDnode(SMnode *pMnode) {
+  SDnodeObj dnodeObj = {0};
+  dnodeObj.id = 1;
+  dnodeObj.createdTime = taosGetTimestampMs();
+  dnodeObj.updateTime = dnodeObj.createdTime;
+  dnodeObj.port = pMnode->replicas[0].port;
+  memcpy(&dnodeObj.fqdn, pMnode->replicas[0].fqdn, TSDB_FQDN_LEN);
+
+  SSdbRaw *pRaw = mndDnodeActionEncode(&dnodeObj);
+  if (pRaw == NULL) return -1;
+  sdbSetRawStatus(pRaw, SDB_STATUS_READY);
+
+  mDebug("dnode:%d, will be created while deploy sdb", dnodeObj.id);
+  return sdbWrite(pMnode->pSdb, pRaw);
+}
+
 static SSdbRaw *mndDnodeActionEncode(SDnodeObj *pDnode) {
-  SSdbRaw *pRaw = sdbAllocRaw(SDB_DNODE, SDB_DNODE_VER, sizeof(SDnodeObj));
+  SSdbRaw *pRaw = sdbAllocRaw(SDB_DNODE, TSDB_DNODE_VER, sizeof(SDnodeObj));
   if (pRaw == NULL) return NULL;
 
   int32_t dataPos = 0;
@@ -55,7 +126,7 @@ static SSdbRow *mndDnodeActionDecode(SSdbRaw *pRaw) {
   int8_t sver = 0;
   if (sdbGetRawSoftVer(pRaw, &sver) != 0) return NULL;
 
-  if (sver != SDB_DNODE_VER) {
+  if (sver != TSDB_DNODE_VER) {
     terrno = TSDB_CODE_SDB_INVALID_DATA_VER;
     mError("failed to decode dnode since %s", terrstr());
     return NULL;
@@ -101,30 +172,30 @@ static int32_t mndDnodeActionDelete(SSdb *pSdb, SDnodeObj *pDnode) {
   return 0;
 }
 
-static int32_t mndDnodeActionUpdate(SSdb *pSdb, SDnodeObj *pSrcDnode, SDnodeObj *pDstDnode) {
-  mTrace("dnode:%d, perform update action", pSrcDnode->id);
-  pSrcDnode->id = pDstDnode->id;
-  pSrcDnode->createdTime = pDstDnode->createdTime;
-  pSrcDnode->updateTime = pDstDnode->updateTime;
-  pSrcDnode->port = pDstDnode->port;
-  memcpy(pSrcDnode->fqdn, pDstDnode->fqdn, TSDB_FQDN_LEN); 
+static int32_t mndDnodeActionUpdate(SSdb *pSdb, SDnodeObj *pOldDnode, SDnodeObj *pNewDnode) {
+  mTrace("dnode:%d, perform update action", pOldDnode->id);
+  pOldDnode->id = pNewDnode->id;
+  pOldDnode->createdTime = pNewDnode->createdTime;
+  pOldDnode->updateTime = pNewDnode->updateTime;
+  pOldDnode->port = pNewDnode->port;
+  memcpy(pOldDnode->fqdn, pNewDnode->fqdn, TSDB_FQDN_LEN);
   return 0;
 }
 
-static int32_t mndCreateDefaultDnode(SMnode *pMnode) {
-  SDnodeObj dnodeObj = {0};
-  dnodeObj.id = 1;
-  dnodeObj.createdTime = taosGetTimestampMs();
-  dnodeObj.updateTime = dnodeObj.createdTime;
-  dnodeObj.port = pMnode->replicas[0].port;
-  memcpy(&dnodeObj.fqdn, pMnode->replicas[0].fqdn, TSDB_FQDN_LEN);
+SDnodeObj *mndAcquireDnode(SMnode *pMnode, int32_t dnodeId) {
+  SSdb *pSdb = pMnode->pSdb;
+  return sdbAcquire(pSdb, SDB_DNODE, &dnodeId);
+}
 
-  SSdbRaw *pRaw = mndDnodeActionEncode(&dnodeObj);
-  if (pRaw == NULL) return -1;
-  sdbSetRawStatus(pRaw, SDB_STATUS_READY);
+void mndReleaseDnode(SMnode *pMnode, SDnodeObj *pDnode) {
+  SSdb *pSdb = pMnode->pSdb;
+  sdbRelease(pSdb, pDnode);
+}
 
-  mTrace("dnode:%d, will be created while deploy sdb", dnodeObj.id);
-  return sdbWrite(pMnode->pSdb, pRaw);
+SEpSet mndGetDnodeEpset(SDnodeObj *pDnode) {
+  SEpSet epSet = {.inUse = 0, .numOfEps = 1, .port[0] = pDnode->port};
+  memcpy(epSet.fqdn[0], pDnode->fqdn, TSDB_FQDN_LEN);
+  return epSet;
 }
 
 static SDnodeObj *mndAcquireDnodeByEp(SMnode *pMnode, char *pEpStr) {
@@ -145,7 +216,7 @@ static SDnodeObj *mndAcquireDnodeByEp(SMnode *pMnode, char *pEpStr) {
   return NULL;
 }
 
-static int32_t mndGetDnodeSize(SMnode *pMnode) {
+int32_t mndGetDnodeSize(SMnode *pMnode) {
   SSdb *pSdb = pMnode->pSdb;
   return sdbGetSize(pSdb, SDB_DNODE);
 }
@@ -317,38 +388,385 @@ static int32_t mndProcessStatusMsg(SMnodeMsg *pMsg) {
   return 0;
 }
 
-static int32_t mndProcessCreateDnodeMsg(SMnodeMsg *pMsg) { return 0; }
+static int32_t mndCreateDnode(SMnode *pMnode, SMnodeMsg *pMsg, SCreateDnodeMsg *pCreate) {
+  SDnodeObj dnodeObj = {0};
+  dnodeObj.id = 1;  // todo
+  dnodeObj.createdTime = taosGetTimestampMs();
+  dnodeObj.updateTime = dnodeObj.createdTime;
+  taosGetFqdnPortFromEp(pCreate->ep, dnodeObj.fqdn, &dnodeObj.port);
 
-static int32_t mndProcessDropDnodeMsg(SMnodeMsg *pMsg) { return 0; }
+  if (dnodeObj.fqdn[0] == 0 || dnodeObj.port <= 0) {
+    terrno = TSDB_CODE_SDB_APP_ERROR;
+    mError("dnode:%s, failed to create since %s", pCreate->ep, terrstr());
+    return terrno;
+  }
 
-static int32_t mndProcessConfigDnodeMsg(SMnodeMsg *pMsg) { return 0; }
+  STrans *pTrans = mndTransCreate(pMnode, TRN_POLICY_ROLLBACK, pMsg->rpcMsg.handle);
+  if (pTrans == NULL) {
+    mError("dnode:%s, failed to create since %s", pCreate->ep, terrstr());
+    return -1;
+  }
+  mDebug("trans:%d, used to create dnode:%s", pTrans->id, pCreate->ep);
 
-int32_t mndInitDnode(SMnode *pMnode) {
-  SSdbTable table = {.sdbType = SDB_DNODE,
-                     .keyType = SDB_KEY_INT32,
-                     .deployFp = (SdbDeployFp)mndCreateDefaultDnode,
-                     .encodeFp = (SdbEncodeFp)mndDnodeActionEncode,
-                     .decodeFp = (SdbDecodeFp)mndDnodeActionDecode,
-                     .insertFp = (SdbInsertFp)mndDnodeActionInsert,
-                     .updateFp = (SdbUpdateFp)mndDnodeActionUpdate,
-                     .deleteFp = (SdbDeleteFp)mndDnodeActionDelete};
+  SSdbRaw *pRedoRaw = mndDnodeActionEncode(&dnodeObj);
+  if (pRedoRaw == NULL || mndTransAppendRedolog(pTrans, pRedoRaw) != 0) {
+    mError("trans:%d, failed to append redo log since %s", pTrans->id, terrstr());
+    mndTransDrop(pTrans);
+    return -1;
+  }
+  sdbSetRawStatus(pRedoRaw, SDB_STATUS_CREATING);
 
-  mndSetMsgHandle(pMnode, TSDB_MSG_TYPE_CREATE_DNODE, mndProcessCreateDnodeMsg);
-  mndSetMsgHandle(pMnode, TSDB_MSG_TYPE_DROP_DNODE, mndProcessDropDnodeMsg);
-  mndSetMsgHandle(pMnode, TSDB_MSG_TYPE_CONFIG_DNODE, mndProcessConfigDnodeMsg);
-  mndSetMsgHandle(pMnode, TSDB_MSG_TYPE_STATUS, mndProcessStatusMsg);
+  SSdbRaw *pUndoRaw = mndDnodeActionEncode(&dnodeObj);
+  if (pUndoRaw == NULL || mndTransAppendUndolog(pTrans, pUndoRaw) != 0) {
+    mError("trans:%d, failed to append undo log since %s", pTrans->id, terrstr());
+    mndTransDrop(pTrans);
+    return -1;
+  }
+  sdbSetRawStatus(pUndoRaw, SDB_STATUS_DROPPED);
 
-  return sdbSetTable(pMnode->pSdb, table);
+  SSdbRaw *pCommitRaw = mndDnodeActionEncode(&dnodeObj);
+  if (pCommitRaw == NULL || mndTransAppendCommitlog(pTrans, pCommitRaw) != 0) {
+    mError("trans:%d, failed to append commit log since %s", pTrans->id, terrstr());
+    mndTransDrop(pTrans);
+    return -1;
+  }
+  sdbSetRawStatus(pCommitRaw, SDB_STATUS_READY);
+
+  if (mndTransPrepare(pTrans) != 0) {
+    mError("trans:%d, failed to prepare since %s", pTrans->id, terrstr());
+    mndTransDrop(pTrans);
+    return -1;
+  }
+
+  mndTransDrop(pTrans);
+  return 0;
 }
 
-void mndCleanupDnode(SMnode *pMnode) {}
+static int32_t mndProcessCreateDnodeMsg(SMnodeMsg *pMsg) {
+  SMnode          *pMnode = pMsg->pMnode;
+  SCreateDnodeMsg *pCreate = pMsg->rpcMsg.pCont;
 
-SDnodeObj *mndAcquireDnode(SMnode *pMnode, int32_t dnodeId) {
-  SSdb *pSdb = pMnode->pSdb;
-  return sdbAcquire(pSdb, SDB_DNODE, &dnodeId);
+  mDebug("dnode:%s, start to create", pCreate->ep);
+
+  if (pCreate->ep[0] == 0) {
+    terrno = TSDB_CODE_SDB_APP_ERROR;
+    mError("dnode:%s, failed to create since %s", pCreate->ep, terrstr());
+    return -1;
+  }
+
+  SDnodeObj *pDnode = mndAcquireDnodeByEp(pMnode, pCreate->ep);
+  if (pDnode != NULL) {
+    mError("dnode:%d, already exist", pDnode->id);
+    sdbRelease(pMnode->pSdb, pDnode);
+    terrno = TSDB_CODE_MND_DNODE_ALREADY_EXIST;
+    return -1;
+  }
+
+  int32_t code = mndCreateDnode(pMnode, pMsg, pCreate);
+
+  if (code != 0) {
+    mError("dnode:%s, failed to create since %s", pCreate->ep, terrstr());
+    return -1;
+  }
+
+  return TSDB_CODE_MND_ACTION_IN_PROGRESS;
 }
 
-void mndReleaseDnode(SMnode *pMnode, SDnodeObj *pDnode) {
-  SSdb *pSdb = pMnode->pSdb;
-  sdbRelease(pSdb, pDnode);
+static int32_t mndDropDnode(SMnode *pMnode, SMnodeMsg *pMsg, SDnodeObj *pDnode) {
+  STrans *pTrans = mndTransCreate(pMnode, TRN_POLICY_ROLLBACK, pMsg->rpcMsg.handle);
+  if (pTrans == NULL) {
+    mError("dnode:%d, failed to drop since %s", pDnode->id, terrstr());
+    return -1;
+  }
+  mDebug("trans:%d, used to drop user:%d", pTrans->id, pDnode->id);
+
+  SSdbRaw *pRedoRaw = mndDnodeActionEncode(pDnode);
+  if (pRedoRaw == NULL || mndTransAppendRedolog(pTrans, pRedoRaw) != 0) {
+    mError("trans:%d, failed to append redo log since %s", pTrans->id, terrstr());
+    mndTransDrop(pTrans);
+    return -1;
+  }
+  sdbSetRawStatus(pRedoRaw, SDB_STATUS_DROPPING);
+
+  SSdbRaw *pUndoRaw = mndDnodeActionEncode(pDnode);
+  if (pUndoRaw == NULL || mndTransAppendUndolog(pTrans, pUndoRaw) != 0) {
+    mError("trans:%d, failed to append undo log since %s", pTrans->id, terrstr());
+    mndTransDrop(pTrans);
+    return -1;
+  }
+  sdbSetRawStatus(pUndoRaw, SDB_STATUS_READY);
+
+  SSdbRaw *pCommitRaw = mndDnodeActionEncode(pDnode);
+  if (pCommitRaw == NULL || mndTransAppendCommitlog(pTrans, pCommitRaw) != 0) {
+    mError("trans:%d, failed to append commit log since %s", pTrans->id, terrstr());
+    mndTransDrop(pTrans);
+    return -1;
+  }
+  sdbSetRawStatus(pCommitRaw, SDB_STATUS_DROPPED);
+
+  if (mndTransPrepare(pTrans) != 0) {
+    mError("trans:%d, failed to prepare since %s", pTrans->id, terrstr());
+    mndTransDrop(pTrans);
+    return -1;
+  }
+
+  mndTransDrop(pTrans);
+  return 0;
 }
+
+static int32_t mndProcessDropDnodeMsg(SMnodeMsg *pMsg) {
+  SMnode        *pMnode = pMsg->pMnode;
+  SDropDnodeMsg *pDrop = pMsg->rpcMsg.pCont;
+  pDrop->dnodeId = htonl(pDrop->dnodeId);
+
+  mDebug("dnode:%d, start to drop", pDrop->dnodeId);
+
+  if (pDrop->dnodeId <= 0) {
+    terrno = TSDB_CODE_SDB_APP_ERROR;
+    mError("dnode:%d, failed to drop since %s", pDrop->dnodeId, terrstr());
+    return -1;
+  }
+
+  SDnodeObj *pDnode = mndAcquireDnode(pMnode, pDrop->dnodeId);
+  if (pDnode == NULL) {
+    mError("dnode:%d, not exist", pDrop->dnodeId);
+    terrno = TSDB_CODE_MND_DNODE_NOT_EXIST;
+    return -1;
+  }
+
+  int32_t code = mndDropDnode(pMnode, pMsg, pDnode);
+
+  if (code != 0) {
+    mError("dnode:%d, failed to drop since %s", pDrop->dnodeId, terrstr());
+    return -1;
+  }
+
+  sdbRelease(pMnode->pSdb, pDnode);
+  return TSDB_CODE_MND_ACTION_IN_PROGRESS;
+}
+
+static int32_t mndProcessConfigDnodeMsg(SMnodeMsg *pMsg) {
+  SMnode       *pMnode = pMsg->pMnode;
+  SCfgDnodeMsg *pCfg = pMsg->rpcMsg.pCont;
+  pCfg->dnodeId = htonl(pCfg->dnodeId);
+
+  SDnodeObj *pDnode = mndAcquireDnode(pMnode, pCfg->dnodeId);
+  if (pDnode == NULL) {
+    terrno = TSDB_CODE_MND_DNODE_NOT_EXIST;
+    mError("dnode:%d, failed to cfg since %s ", pCfg->dnodeId, terrstr());
+    return -1;
+  }
+
+  SEpSet epSet = mndGetDnodeEpset(pDnode);
+  mndReleaseDnode(pMnode, pDnode);
+
+  SCfgDnodeMsg *pCfgDnode = rpcMallocCont(sizeof(SCfgDnodeMsg));
+  pCfgDnode->dnodeId = htonl(pCfg->dnodeId);
+  memcpy(pCfgDnode->config, pCfg->config, 128);
+
+  SRpcMsg rpcMsg = {.msgType = TSDB_MSG_TYPE_CONFIG_DNODE_IN, .pCont = pCfgDnode, .contLen = sizeof(SCfgDnodeMsg)};
+
+  mInfo("dnode:%d, is configured", pCfg->dnodeId);
+  mndSendMsgToDnode(pMnode, &epSet, &rpcMsg);
+
+  return 0;
+}
+
+static int32_t mndProcessConfigDnodeRsp(SMnodeMsg *pMsg) { mInfo("cfg dnode rsp is received"); }
+
+static int32_t mndGetConfigMeta(SMnodeMsg *pMsg, SShowObj *pShow, STableMetaMsg *pMeta) {
+  int32_t  cols = 0;
+  SSchema *pSchema = pMeta->pSchema;
+
+  pShow->bytes[cols] = TSDB_CONFIG_OPTION_LEN + VARSTR_HEADER_SIZE;
+  pSchema[cols].type = TSDB_DATA_TYPE_BINARY;
+  tstrncpy(pSchema[cols].name, "name", sizeof(pSchema[cols].name));
+  pSchema[cols].bytes = htons(pShow->bytes[cols]);
+  cols++;
+
+  pShow->bytes[cols] = TSDB_CONIIG_VALUE_LEN + VARSTR_HEADER_SIZE;
+  pSchema[cols].type = TSDB_DATA_TYPE_BINARY;
+  tstrncpy(pSchema[cols].name, "value", sizeof(pSchema[cols].name));
+  pSchema[cols].bytes = htons(pShow->bytes[cols]);
+  cols++;
+
+  pMeta->numOfColumns = htons(cols);
+  pShow->numOfColumns = cols;
+
+  pShow->offset[0] = 0;
+  for (int32_t i = 1; i < cols; ++i) {
+    pShow->offset[i] = pShow->offset[i - 1] + pShow->bytes[i - 1];
+  }
+
+  pShow->numOfRows = TSDB_CONFIG_NUMBER;
+  pShow->rowSize = pShow->offset[cols - 1] + pShow->bytes[cols - 1];
+  pShow->pIter = NULL;
+  strcpy(pMeta->tableFname, mndShowStr(pShow->type));
+
+  return 0;
+}
+
+static int32_t mndRetrieveConfigs(SMnodeMsg *pMsg, SShowObj *pShow, char *data, int32_t rows) {
+  SMnode *pMnode = pMsg->pMnode;
+  int32_t numOfRows = 0;
+  char   *cfgOpts[TSDB_CONFIG_NUMBER] = {0};
+  char    cfgVals[TSDB_CONFIG_NUMBER][TSDB_CONIIG_VALUE_LEN + 1] = {0};
+  char   *pWrite;
+  int32_t cols = 0;
+
+  cfgOpts[numOfRows] = "statusInterval";
+  snprintf(cfgVals[numOfRows], TSDB_CONIIG_VALUE_LEN, "%d", pMnode->cfg.statusInterval);
+  numOfRows++;
+
+  cfgOpts[numOfRows] = "timezone";
+  snprintf(cfgVals[numOfRows], TSDB_CONIIG_VALUE_LEN, "%s", pMnode->cfg.timezone);
+  numOfRows++;
+
+  cfgOpts[numOfRows] = "locale";
+  snprintf(cfgVals[numOfRows], TSDB_CONIIG_VALUE_LEN, "%s", pMnode->cfg.locale);
+  numOfRows++;
+
+  cfgOpts[numOfRows] = "charset";
+  snprintf(cfgVals[numOfRows], TSDB_CONIIG_VALUE_LEN, "%s", pMnode->cfg.charset);
+  numOfRows++;
+
+  for (int32_t i = 0; i < numOfRows; i++) {
+    cols = 0;
+
+    pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
+    STR_WITH_MAXSIZE_TO_VARSTR(pWrite, cfgOpts[i], TSDB_CONFIG_OPTION_LEN);
+    cols++;
+
+    pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
+    STR_WITH_MAXSIZE_TO_VARSTR(pWrite, cfgVals[i], TSDB_CONIIG_VALUE_LEN);
+    cols++;
+  }
+
+  mnodeVacuumResult(data, pShow->numOfColumns, numOfRows, rows, pShow);
+  pShow->numOfReads += numOfRows;
+  return numOfRows;
+}
+
+static void mndCancelGetNextConfig(SMnode *pMnode, void *pIter) {}
+
+static int32_t mndGetDnodeMeta(SMnodeMsg *pMsg, SShowObj *pShow, STableMetaMsg *pMeta) {
+  SMnode *pMnode = pMsg->pMnode;
+  SSdb   *pSdb = pMnode->pSdb;
+
+  int32_t  cols = 0;
+  SSchema *pSchema = pMeta->pSchema;
+
+  pShow->bytes[cols] = 2;
+  pSchema[cols].type = TSDB_DATA_TYPE_SMALLINT;
+  strcpy(pSchema[cols].name, "id");
+  pSchema[cols].bytes = htons(pShow->bytes[cols]);
+  cols++;
+
+  pShow->bytes[cols] = TSDB_EP_LEN + VARSTR_HEADER_SIZE;
+  pSchema[cols].type = TSDB_DATA_TYPE_BINARY;
+  strcpy(pSchema[cols].name, "end point");
+  pSchema[cols].bytes = htons(pShow->bytes[cols]);
+  cols++;
+
+  pShow->bytes[cols] = 2;
+  pSchema[cols].type = TSDB_DATA_TYPE_SMALLINT;
+  strcpy(pSchema[cols].name, "vnodes");
+  pSchema[cols].bytes = htons(pShow->bytes[cols]);
+  cols++;
+
+  pShow->bytes[cols] = 2;
+  pSchema[cols].type = TSDB_DATA_TYPE_SMALLINT;
+  strcpy(pSchema[cols].name, "cores");
+  pSchema[cols].bytes = htons(pShow->bytes[cols]);
+  cols++;
+
+  pShow->bytes[cols] = 10 + VARSTR_HEADER_SIZE;
+  pSchema[cols].type = TSDB_DATA_TYPE_BINARY;
+  strcpy(pSchema[cols].name, "status");
+  pSchema[cols].bytes = htons(pShow->bytes[cols]);
+  cols++;
+
+  pShow->bytes[cols] = 8;
+  pSchema[cols].type = TSDB_DATA_TYPE_TIMESTAMP;
+  strcpy(pSchema[cols].name, "create time");
+  pSchema[cols].bytes = htons(pShow->bytes[cols]);
+  cols++;
+
+  pShow->bytes[cols] = 24 + VARSTR_HEADER_SIZE;
+  pSchema[cols].type = TSDB_DATA_TYPE_BINARY;
+  strcpy(pSchema[cols].name, "offline reason");
+  pSchema[cols].bytes = htons(pShow->bytes[cols]);
+  cols++;
+
+  pMeta->numOfColumns = htons(cols);
+  pShow->numOfColumns = cols;
+
+  pShow->offset[0] = 0;
+  for (int32_t i = 1; i < cols; ++i) {
+    pShow->offset[i] = pShow->offset[i - 1] + pShow->bytes[i - 1];
+  }
+
+  pShow->numOfRows = sdbGetSize(pSdb, SDB_DNODE);
+  pShow->rowSize = pShow->offset[cols - 1] + pShow->bytes[cols - 1];
+  strcpy(pMeta->tableFname, mndShowStr(pShow->type));
+
+  return 0;
+}
+
+static int32_t mndRetrieveDnodes(SMnodeMsg *pMsg, SShowObj *pShow, char *data, int32_t rows) {
+  SMnode    *pMnode = pMsg->pMnode;
+  SSdb      *pSdb = pMnode->pSdb;
+  int32_t    numOfRows = 0;
+  int32_t    cols = 0;
+  SDnodeObj *pDnode = NULL;
+  char      *pWrite;
+
+  while (numOfRows < rows) {
+    pShow->pIter = sdbFetch(pSdb, SDB_DNODE, pShow->pIter, (void **)&pDnode);
+    if (pShow->pIter == NULL) break;
+
+    cols = 0;
+
+    pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
+    *(int16_t *)pWrite = pDnode->id;
+    cols++;
+
+    pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
+    STR_WITH_MAXSIZE_TO_VARSTR(pWrite, pDnode->ep, pShow->bytes[cols]);
+    cols++;
+
+    pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
+    *(int16_t *)pWrite = pDnode->numOfVnodes;
+    cols++;
+
+    pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
+    *(int16_t *)pWrite = pDnode->numOfCores;
+    cols++;
+
+    pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
+    const char *status = dnodeStatus[pDnode->status];
+    STR_TO_VARSTR(pWrite, status);
+    cols++;
+
+    pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
+    *(int64_t *)pWrite = pDnode->createdTime;
+    cols++;
+
+    pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
+    STR_TO_VARSTR(pWrite, offlineReason[pDnode->offlineReason]);
+    cols++;
+
+    numOfRows++;
+    sdbRelease(pSdb, pDnode);
+  }
+
+  mnodeVacuumResult(data, pShow->numOfColumns, numOfRows, rows, pShow);
+  pShow->numOfReads += numOfRows;
+
+  return numOfRows;
+}
+
+static void mndCancelGetNextDnode(SMnode *pMnode, void *pIter) {
+  SSdb *pSdb = pMnode->pSdb;
+  sdbCancelFetch(pSdb, pIter);
+}
\ No newline at end of file

source/dnode/mnode/impl/src/mndFunc.c

@@ -14,8 +14,498 @@
  */
 
 #define _DEFAULT_SOURCE
-#include "os.h"
-#include "mndInt.h"
+#include "mndFunc.h"
+#include "mndShow.h"
+#include "mndSync.h"
+#include "mndTrans.h"
 
-int32_t mndInitFunc(SMnode *pMnode) { return 0; }
-void    mndCleanupFunc(SMnode *pMnode) {}
+#define SDB_FUNC_VER 1
+
\ No newline at end of file
+static SSdbRaw *mndFuncActionEncode(SFuncObj *pFunc);
+static SSdbRow *mndFuncActionDecode(SSdbRaw *pRaw);
+static int32_t  mndFuncActionInsert(SSdb *pSdb, SFuncObj *pFunc);
+static int32_t  mndFuncActionDelete(SSdb *pSdb, SFuncObj *pFunc);
+static int32_t  mndFuncActionUpdate(SSdb *pSdb, SFuncObj *pOldFunc, SFuncObj *pNewFunc);
+static int32_t  mndCreateFunc(SMnode *pMnode, SMnodeMsg *pMsg, SCreateFuncMsg *pCreate);
+static int32_t  mndDropFunc(SMnode *pMnode, SMnodeMsg *pMsg, SFuncObj *pFunc);
+static int32_t  mndProcessCreateFuncMsg(SMnodeMsg *pMsg);
+static int32_t  mndProcessDropFuncMsg(SMnodeMsg *pMsg);
+static int32_t  mndProcessRetrieveFuncMsg(SMnodeMsg *pMsg);
+static int32_t  mndGetFuncMeta(SMnodeMsg *pMsg, SShowObj *pShow, STableMetaMsg *pMeta);
+static int32_t  mndRetrieveFuncs(SMnodeMsg *pMsg, SShowObj *pShow, char *data, int32_t rows);
+static void     mndCancelGetNextFunc(SMnode *pMnode, void *pIter);
+
+int32_t mndInitFunc(SMnode *pMnode) {
+  SSdbTable table = {.sdbType = SDB_FUNC,
+                     .keyType = SDB_KEY_BINARY,
+                     .encodeFp = (SdbEncodeFp)mndFuncActionEncode,
+                     .decodeFp = (SdbDecodeFp)mndFuncActionDecode,
+                     .insertFp = (SdbInsertFp)mndFuncActionInsert,
+                     .updateFp = (SdbUpdateFp)mndFuncActionUpdate,
+                     .deleteFp = (SdbDeleteFp)mndFuncActionDelete};
+
+  mndSetMsgHandle(pMnode, TSDB_MSG_TYPE_CREATE_FUNCTION, mndProcessCreateFuncMsg);
+  mndSetMsgHandle(pMnode, TSDB_MSG_TYPE_DROP_FUNCTION, mndProcessDropFuncMsg);
+  mndSetMsgHandle(pMnode, TSDB_MSG_TYPE_RETRIEVE_FUNCTION, mndProcessRetrieveFuncMsg);
+
+  mndAddShowMetaHandle(pMnode, TSDB_MGMT_TABLE_FUNCTION, mndGetFuncMeta);
+  mndAddShowRetrieveHandle(pMnode, TSDB_MGMT_TABLE_FUNCTION, mndRetrieveFuncs);
+  mndAddShowFreeIterHandle(pMnode, TSDB_MGMT_TABLE_FUNCTION, mndCancelGetNextFunc);
+
+  return sdbSetTable(pMnode->pSdb, table);
+}
+
+void mndCleanupFunc(SMnode *pMnode) {}
+
+static SSdbRaw *mndFuncActionEncode(SFuncObj *pFunc) {
+  int32_t  size = pFunc->commentSize + pFunc->codeSize + sizeof(SFuncObj);
+  SSdbRaw *pRaw = sdbAllocRaw(SDB_FUNC, SDB_FUNC_VER, size);
+  if (pRaw == NULL) return NULL;
+
+  int32_t dataPos = 0;
+  SDB_SET_BINARY(pRaw, dataPos, pFunc->name, TSDB_FUNC_NAME_LEN)
+  SDB_SET_INT64(pRaw, dataPos, pFunc->createdTime)
+  SDB_SET_INT8(pRaw, dataPos, pFunc->funcType)
+  SDB_SET_INT8(pRaw, dataPos, pFunc->scriptType)
+  SDB_SET_INT8(pRaw, dataPos, pFunc->align)
+  SDB_SET_INT8(pRaw, dataPos, pFunc->outputType)
+  SDB_SET_INT32(pRaw, dataPos, pFunc->outputLen)
+  SDB_SET_INT32(pRaw, dataPos, pFunc->bufSize)
+  SDB_SET_INT64(pRaw, dataPos, pFunc->sigature)
+  SDB_SET_INT32(pRaw, dataPos, pFunc->commentSize)
+  SDB_SET_INT32(pRaw, dataPos, pFunc->codeSize)
+  SDB_SET_BINARY(pRaw, dataPos, pFunc->pComment, pFunc->commentSize)
+  SDB_SET_BINARY(pRaw, dataPos, pFunc->pCode, pFunc->codeSize)
+  SDB_SET_DATALEN(pRaw, dataPos);
+
+  return pRaw;
+}
+
+static SSdbRow *mndFuncActionDecode(SSdbRaw *pRaw) {
+  int8_t sver = 0;
+  if (sdbGetRawSoftVer(pRaw, &sver) != 0) return NULL;
+
+  if (sver != SDB_FUNC_VER) {
+    mError("failed to decode func since %s", terrstr());
+    terrno = TSDB_CODE_SDB_INVALID_DATA_VER;
+    return NULL;
+  }
+
+  int32_t   size = sizeof(SFuncObj) + TSDB_FUNC_COMMENT_LEN + TSDB_FUNC_CODE_LEN;
+  SSdbRow  *pRow = sdbAllocRow(size);
+  SFuncObj *pFunc = sdbGetRowObj(pRow);
+  if (pFunc == NULL) return NULL;
+  char *tmp = (char *)pFunc + sizeof(SFuncObj);
+
+  int32_t dataPos = 0;
+  SDB_GET_BINARY(pRaw, pRow, dataPos, pFunc->name, TSDB_FUNC_NAME_LEN)
+  SDB_GET_INT64(pRaw, pRow, dataPos, &pFunc->createdTime)
+  SDB_GET_INT8(pRaw, pRow, dataPos, &pFunc->funcType)
+  SDB_GET_INT8(pRaw, pRow, dataPos, &pFunc->scriptType)
+  SDB_GET_INT8(pRaw, pRow, dataPos, &pFunc->align)
+  SDB_GET_INT8(pRaw, pRow, dataPos, &pFunc->outputType)
+  SDB_GET_INT32(pRaw, pRow, dataPos, &pFunc->outputLen)
+  SDB_GET_INT32(pRaw, pRow, dataPos, &pFunc->bufSize)
+  SDB_GET_INT64(pRaw, pRow, dataPos, &pFunc->sigature)
+  SDB_GET_INT32(pRaw, pRow, dataPos, &pFunc->commentSize)
+  SDB_GET_INT32(pRaw, pRow, dataPos, &pFunc->codeSize)
+  SDB_GET_BINARY(pRaw, pRow, dataPos, pFunc->pData, pFunc->commentSize + pFunc->codeSize)
+  pFunc->pComment = pFunc->pData;
+  pFunc->pCode = (pFunc->pData + pFunc->commentSize);
+
+  return pRow;
+}
+
+static int32_t mndFuncActionInsert(SSdb *pSdb, SFuncObj *pFunc) {
+  mTrace("func:%s, perform insert action", pFunc->name);
+  return 0;
+}
+
+static int32_t mndFuncActionDelete(SSdb *pSdb, SFuncObj *pFunc) {
+  mTrace("func:%s, perform delete action", pFunc->name);
+  return 0;
+}
+
+static int32_t mndFuncActionUpdate(SSdb *pSdb, SFuncObj *pOldFunc, SFuncObj *pNewFunc) {
+  mTrace("func:%s, perform update action", pOldFunc->name);
+  return 0;
+}
+
+static int32_t mndCreateFunc(SMnode *pMnode, SMnodeMsg *pMsg, SCreateFuncMsg *pCreate) {
+  SFuncObj *pFunc = calloc(1, sizeof(SFuncObj) + pCreate->commentSize + pCreate->codeSize);
+  pFunc->createdTime = taosGetTimestampMs();
+  pFunc->funcType = pCreate->funcType;
+  pFunc->scriptType = pCreate->scriptType;
+  pFunc->outputType = pCreate->outputType;
+  pFunc->outputLen = pCreate->outputLen;
+  pFunc->bufSize = pCreate->bufSize;
+  pFunc->sigature = pCreate->sigature;
+  pFunc->commentSize = pCreate->commentSize;
+  pFunc->codeSize = pCreate->codeSize;
+  pFunc->pComment = pFunc->pData;
+  memcpy(pFunc->pComment, pCreate->pCont, pCreate->commentSize);
+  pFunc->pCode = pFunc->pData + pCreate->commentSize;
+  memcpy(pFunc->pCode, pCreate->pCont + pCreate->commentSize, pFunc->codeSize);
+
+  STrans *pTrans = mndTransCreate(pMnode, TRN_POLICY_ROLLBACK, pMsg->rpcMsg.handle);
+  if (pTrans == NULL) {
+    free(pFunc);
+    mError("func:%s, failed to create since %s", pCreate->name, terrstr());
+    return -1;
+  }
+
+  mDebug("trans:%d, used to create func:%s", pTrans->id, pCreate->name);
+
+  SSdbRaw *pRedoRaw = mndFuncActionEncode(pFunc);
+  if (pRedoRaw == NULL || mndTransAppendRedolog(pTrans, pRedoRaw) != 0) {
+    mError("trans:%d, failed to append redo log since %s", pTrans->id, terrstr());
+    free(pFunc);
+    mndTransDrop(pTrans);
+    return -1;
+  }
+  sdbSetRawStatus(pRedoRaw, SDB_STATUS_CREATING);
+
+  SSdbRaw *pUndoRaw = mndFuncActionEncode(pFunc);
+  if (pUndoRaw == NULL || mndTransAppendUndolog(pTrans, pUndoRaw) != 0) {
+    mError("trans:%d, failed to append undo log since %s", pTrans->id, terrstr());
+    free(pFunc);
+    mndTransDrop(pTrans);
+    return -1;
+  }
+  sdbSetRawStatus(pUndoRaw, SDB_STATUS_DROPPED);
+
+  SSdbRaw *pCommitRaw = mndFuncActionEncode(pFunc);
+  if (pCommitRaw == NULL || mndTransAppendCommitlog(pTrans, pCommitRaw) != 0) {
+    mError("trans:%d, failed to append commit log since %s", pTrans->id, terrstr());
+    free(pFunc);
+    mndTransDrop(pTrans);
+    return -1;
+  }
+  sdbSetRawStatus(pCommitRaw, SDB_STATUS_READY);
+
+  if (mndTransPrepare(pTrans) != 0) {
+    mError("trans:%d, failed to prepare since %s", pTrans->id, terrstr());
+    mndTransDrop(pTrans);
+    return -1;
+  }
+
+  free(pFunc);
+  mndTransDrop(pTrans);
+  return 0;
+}
+
+static int32_t mndDropFunc(SMnode *pMnode, SMnodeMsg *pMsg, SFuncObj *pFunc) {
+  STrans *pTrans = mndTransCreate(pMnode, TRN_POLICY_ROLLBACK, pMsg->rpcMsg.handle);
+  if (pTrans == NULL) {
+    mError("func:%s, failed to drop since %s", pFunc->name, terrstr());
+    return -1;
+  }
+  mDebug("trans:%d, used to drop user:%s", pTrans->id, pFunc->name);
+
+  SSdbRaw *pRedoRaw = mndFuncActionEncode(pFunc);
+  if (pRedoRaw == NULL || mndTransAppendRedolog(pTrans, pRedoRaw) != 0) {
+    mError("trans:%d, failed to append redo log since %s", pTrans->id, terrstr());
+    mndTransDrop(pTrans);
+    return -1;
+  }
+  sdbSetRawStatus(pRedoRaw, SDB_STATUS_DROPPING);
+
+  SSdbRaw *pUndoRaw = mndFuncActionEncode(pFunc);
+  if (pUndoRaw == NULL || mndTransAppendUndolog(pTrans, pUndoRaw) != 0) {
+    mError("trans:%d, failed to append undo log since %s", pTrans->id, terrstr());
+    mndTransDrop(pTrans);
+    return -1;
+  }
+  sdbSetRawStatus(pUndoRaw, SDB_STATUS_READY);
+
+  SSdbRaw *pCommitRaw = mndFuncActionEncode(pFunc);
+  if (pCommitRaw == NULL || mndTransAppendCommitlog(pTrans, pCommitRaw) != 0) {
+    mError("trans:%d, failed to append commit log since %s", pTrans->id, terrstr());
+    mndTransDrop(pTrans);
+    return -1;
+  }
+  sdbSetRawStatus(pCommitRaw, SDB_STATUS_DROPPED);
+
+  if (mndTransPrepare(pTrans) != 0) {
+    mError("trans:%d, failed to prepare since %s", pTrans->id, terrstr());
+    mndTransDrop(pTrans);
+    return -1;
+  }
+
+  mndTransDrop(pTrans);
+  return 0;
+}
+
+static int32_t mndProcessCreateFuncMsg(SMnodeMsg *pMsg) {
+  SMnode *pMnode = pMsg->pMnode;
+
+  SCreateFuncMsg *pCreate = pMsg->rpcMsg.pCont;
+  pCreate->outputLen = htonl(pCreate->outputLen);
+  pCreate->bufSize = htonl(pCreate->bufSize);
+  pCreate->sigature = htobe64(pCreate->sigature);
+  pCreate->commentSize = htonl(pCreate->commentSize);
+  pCreate->codeSize = htonl(pCreate->codeSize);
+
+  mDebug("func:%s, start to create", pCreate->name);
+
+  SFuncObj *pFunc = sdbAcquire(pMnode->pSdb, SDB_FUNC, pCreate->name);
+  if (pFunc != NULL) {
+    sdbRelease(pMnode->pSdb, pFunc);
+    terrno = TSDB_CODE_MND_FUNC_ALREADY_EXIST;
+    mError("func:%s, failed to create since %s", pCreate->name, terrstr());
+    return -1;
+  }
+
+  if (pCreate->name[0] == 0) {
+    terrno = TSDB_CODE_MND_INVALID_FUNC_NAME;
+    mError("func:%s, failed to create since %s", pCreate->name, terrstr());
+    return -1;
+  }
+
+  if (pCreate->commentSize <= 0 || pCreate->commentSize > TSDB_FUNC_COMMENT_LEN) {
+    terrno = TSDB_CODE_MND_INVALID_FUNC_COMMENT;
+    mError("func:%s, failed to create since %s", pCreate->name, terrstr());
+    return -1;
+  }
+
+  if (pCreate->codeSize <= 0 || pCreate->codeSize > TSDB_FUNC_CODE_LEN) {
+    terrno = TSDB_CODE_MND_INVALID_FUNC_CODE;
+    mError("func:%s, failed to create since %s", pCreate->name, terrstr());
+    return -1;
+  }
+
+  if (pCreate->pCont[0] == 0) {
+    terrno = TSDB_CODE_MND_INVALID_FUNC_CODE;
+    mError("func:%s, failed to create since %s", pCreate->name, terrstr());
+    return -1;
+  }
+
+  if (pCreate->bufSize < 0 || pCreate->bufSize > TSDB_FUNC_BUF_SIZE) {
+    terrno = TSDB_CODE_MND_INVALID_FUNC_BUFSIZE;
+    mError("func:%s, failed to create since %s", pCreate->name, terrstr());
+    return -1;
+  }
+
+  int32_t code = mndCreateFunc(pMnode, pMsg, pCreate);
+
+  if (code != 0) {
+    mError("func:%s, failed to create since %s", pCreate->name, terrstr());
+    return -1;
+  }
+
+  return TSDB_CODE_MND_ACTION_IN_PROGRESS;
+}
+
+static int32_t mndProcessDropFuncMsg(SMnodeMsg *pMsg) {
+  SMnode       *pMnode = pMsg->pMnode;
+  SDropFuncMsg *pDrop = pMsg->rpcMsg.pCont;
+
+  mDebug("func:%s, start to drop", pDrop->name);
+
+  if (pDrop->name[0] == 0) {
+    terrno = TSDB_CODE_MND_INVALID_FUNC_NAME;
+    mError("func:%s, failed to drop since %s", pDrop->name, terrstr());
+    return -1;
+  }
+
+  SFuncObj *pFunc = sdbAcquire(pMnode->pSdb, SDB_FUNC, pDrop->name);
+  if (pFunc == NULL) {
+    terrno = TSDB_CODE_MND_FUNC_NOT_EXIST;
+    mError("func:%s, failed to drop since %s", pDrop->name, terrstr());
+    return -1;
+  }
+
+  int32_t code = mndDropFunc(pMnode, pMsg, pFunc);
+
+  if (code != 0) {
+    mError("func:%s, failed to drop since %s", pDrop->name, terrstr());
+    return -1;
+  }
+
+  return TSDB_CODE_MND_ACTION_IN_PROGRESS;
+}
+
+static int32_t mndProcessRetrieveFuncMsg(SMnodeMsg *pMsg) {
+  SMnode *pMnode = pMsg->pMnode;
+
+  SRetrieveFuncMsg *pRetrieve = pMsg->rpcMsg.pCont;
+  pRetrieve->numOfFuncs = htonl(pRetrieve->numOfFuncs);
+
+  int32_t size = sizeof(SRetrieveFuncRsp) + (sizeof(SFuncInfo) + TSDB_FUNC_CODE_LEN) * pRetrieve->numOfFuncs + 16384;
+
+  SRetrieveFuncRsp *pRetrieveRsp = rpcMallocCont(size);
+  pRetrieveRsp->numOfFuncs = htonl(pRetrieve->numOfFuncs);
+  char *pOutput = pRetrieveRsp->pFuncInfos;
+
+  for (int32_t i = 0; i < pRetrieve->numOfFuncs; ++i) {
+    char funcName[TSDB_FUNC_NAME_LEN] = {0};
+    memcpy(funcName, pRetrieve->pFuncNames + i * TSDB_FUNC_NAME_LEN, TSDB_FUNC_NAME_LEN);
+
+    SFuncObj *pFunc = sdbAcquire(pMnode->pSdb, SDB_FUNC, funcName);
+    if (pFunc == NULL) {
+      terrno = TSDB_CODE_MND_INVALID_FUNC;
+      mError("func:%s, failed to retrieve since %s", funcName, terrstr());
+      return -1;
+    }
+
+    SFuncInfo *pFuncInfo = (SFuncInfo *)pOutput;
+
+    strncpy(pFuncInfo->name, pFunc->name, TSDB_FUNC_NAME_LEN);
+    pFuncInfo->funcType = pFunc->funcType;
+    pFuncInfo->scriptType = pFunc->scriptType;
+    pFuncInfo->outputType = pFunc->outputType;
+    pFuncInfo->outputLen = htonl(pFunc->outputLen);
+    pFuncInfo->bufSize = htonl(pFunc->bufSize);
+    pFuncInfo->sigature = htobe64(pFunc->sigature);
+    pFuncInfo->commentSize = htonl(pFunc->commentSize);
+    pFuncInfo->codeSize = htonl(pFunc->codeSize);
+    memcpy(pFuncInfo->pCont, pFunc->pCode, pFunc->commentSize + pFunc->codeSize);
+
+    pOutput += sizeof(SFuncInfo) + pFunc->commentSize + pFunc->codeSize;
+  }
+
+  pMsg->pCont = pRetrieveRsp;
+  pMsg->contLen = (int32_t)(pOutput - (char *)pRetrieveRsp);
+
+  return 0;
+}
+
+static int32_t mndGetFuncMeta(SMnodeMsg *pMsg, SShowObj *pShow, STableMetaMsg *pMeta) {
+  SMnode *pMnode = pMsg->pMnode;
+  SSdb   *pSdb = pMnode->pSdb;
+
+  int32_t  cols = 0;
+  SSchema *pSchema = pMeta->pSchema;
+
+  pShow->bytes[cols] = TSDB_FUNC_NAME_LEN + VARSTR_HEADER_SIZE;
+  pSchema[cols].type = TSDB_DATA_TYPE_BINARY;
+  strcpy(pSchema[cols].name, "name");
+  pSchema[cols].bytes = htons(pShow->bytes[cols]);
+  cols++;
+
+  pShow->bytes[cols] = PATH_MAX + VARSTR_HEADER_SIZE;
+  pSchema[cols].type = TSDB_DATA_TYPE_BINARY;
+  strcpy(pSchema[cols].name, "comment");
+  pSchema[cols].bytes = htons(pShow->bytes[cols]);
+  cols++;
+
+  pShow->bytes[cols] = 4;
+  pSchema[cols].type = TSDB_DATA_TYPE_INT;
+  strcpy(pSchema[cols].name, "aggregate");
+  pSchema[cols].bytes = htons(pShow->bytes[cols]);
+  cols++;
+
+  pShow->bytes[cols] = TSDB_TYPE_STR_MAX_LEN + VARSTR_HEADER_SIZE;
+  pSchema[cols].type = TSDB_DATA_TYPE_BINARY;
+  strcpy(pSchema[cols].name, "outputtype");
+  pSchema[cols].bytes = htons(pShow->bytes[cols]);
+  cols++;
+
+  pShow->bytes[cols] = 8;
+  pSchema[cols].type = TSDB_DATA_TYPE_TIMESTAMP;
+  strcpy(pSchema[cols].name, "create_time");
+  pSchema[cols].bytes = htons(pShow->bytes[cols]);
+  cols++;
+
+  pShow->bytes[cols] = 4;
+  pSchema[cols].type = TSDB_DATA_TYPE_INT;
+  strcpy(pSchema[cols].name, "code_len");
+  pSchema[cols].bytes = htons(pShow->bytes[cols]);
+  cols++;
+
+  pShow->bytes[cols] = 4;
+  pSchema[cols].type = TSDB_DATA_TYPE_INT;
+  strcpy(pSchema[cols].name, "bufsize");
+  pSchema[cols].bytes = htons(pShow->bytes[cols]);
+  cols++;
+
+  pMeta->numOfColumns = htons(cols);
+  pShow->numOfColumns = cols;
+
+  pShow->offset[0] = 0;
+  for (int32_t i = 1; i < cols; ++i) {
+    pShow->offset[i] = pShow->offset[i - 1] + pShow->bytes[i - 1];
+  }
+
+  pShow->numOfRows = sdbGetSize(pSdb, SDB_FUNC);
+  pShow->rowSize = pShow->offset[cols - 1] + pShow->bytes[cols - 1];
+  strcpy(pMeta->tableFname, "show funcs");
+
+  return 0;
+}
+
+static void *mnodeGenTypeStr(char *buf, int32_t buflen, uint8_t type, int16_t len) {
+  char *msg = "unknown";
+  if (type >= sizeof(tDataTypes) / sizeof(tDataTypes[0])) {
+    return msg;
+  }
+
+  if (type == TSDB_DATA_TYPE_NCHAR || type == TSDB_DATA_TYPE_BINARY) {
+    int32_t bytes = len > 0 ? (int)(len - VARSTR_HEADER_SIZE) : len;
+
+    snprintf(buf, buflen - 1, "%s(%d)", tDataTypes[type].name, type == TSDB_DATA_TYPE_NCHAR ? bytes / 4 : bytes);
+    buf[buflen - 1] = 0;
+
+    return buf;
+  }
+
+  return tDataTypes[type].name;
+}
+
+static int32_t mndRetrieveFuncs(SMnodeMsg *pMsg, SShowObj *pShow, char *data, int32_t rows) {
+  SMnode   *pMnode = pMsg->pMnode;
+  SSdb     *pSdb = pMnode->pSdb;
+  int32_t   numOfRows = 0;
+  SFuncObj *pFunc = NULL;
+  int32_t   cols = 0;
+  char     *pWrite;
+  char      buf[TSDB_TYPE_STR_MAX_LEN];
+
+  while (numOfRows < rows) {
+    pShow->pIter = sdbFetch(pSdb, SDB_FUNC, pShow->pIter, (void **)&pFunc);
+    if (pShow->pIter == NULL) break;
+
+    cols = 0;
+
+    pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
+    STR_WITH_MAXSIZE_TO_VARSTR(pWrite, pFunc->name, pShow->bytes[cols]);
+    cols++;
+
+    pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
+    STR_WITH_MAXSIZE_TO_VARSTR(pWrite, pFunc->pComment, pShow->bytes[cols]);
+    cols++;
+
+    pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
+    *(int32_t *)pWrite = pFunc->funcType == TSDB_FUNC_TYPE_AGGREGATE ? 1 : 0;
+    cols++;
+
+    pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
+    STR_WITH_MAXSIZE_TO_VARSTR(pWrite, mnodeGenTypeStr(buf, TSDB_TYPE_STR_MAX_LEN, pFunc->outputType, pFunc->outputLen),
+                               pShow->bytes[cols]);
+    cols++;
+
+    pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
+    *(int64_t *)pWrite = pFunc->createdTime;
+    cols++;
+
+    pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
+    *(int32_t *)pWrite = pFunc->codeSize;
+    cols++;
+
+    pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
+    *(int32_t *)pWrite = pFunc->bufSize;
+    cols++;
+
+    numOfRows++;
+    sdbRelease(pSdb, pFunc);
+  }
+
+  mnodeVacuumResult(data, pShow->numOfColumns, numOfRows, rows, pShow);
+  pShow->numOfReads += numOfRows;
+  return numOfRows;
+}
+
+static void mndCancelGetNextFunc(SMnode *pMnode, void *pIter) {
+  SSdb *pSdb = pMnode->pSdb;
+  sdbCancelFetch(pSdb, pIter);
+}
\ No newline at end of file

source/dnode/mnode/impl/src/mndMnode.c

@@ -14,10 +14,88 @@
  */
 
 #define _DEFAULT_SOURCE
+#include "mndMnode.h"
+#include "mndDnode.h"
+#include "mndShow.h"
 #include "mndTrans.h"
 
 #define SDB_MNODE_VER 1
 
+static int32_t  mndCreateDefaultMnode(SMnode *pMnode);
+static SSdbRaw *mndMnodeActionEncode(SMnodeObj *pMnodeObj);
+static SSdbRow *mndMnodeActionDecode(SSdbRaw *pRaw);
+static int32_t  mndMnodeActionInsert(SSdb *pSdb, SMnodeObj *pMnodeObj);
+static int32_t  mndMnodeActionDelete(SSdb *pSdb, SMnodeObj *pMnodeObj);
+static int32_t  mndMnodeActionUpdate(SSdb *pSdb, SMnodeObj *pOldMnode, SMnodeObj *pNewMnode);
+static int32_t  mndProcessCreateMnodeMsg(SMnodeMsg *pMsg);
+static int32_t  mndProcessDropMnodeMsg(SMnodeMsg *pMsg);
+static int32_t  mndProcessCreateMnodeRsp(SMnodeMsg *pMsg);
+static int32_t  mndProcessDropMnodeRsp(SMnodeMsg *pMsg);
+static int32_t  mndGetMnodeMeta(SMnodeMsg *pMsg, SShowObj *pShow, STableMetaMsg *pMeta);
+static int32_t  mndRetrieveMnodes(SMnodeMsg *pMsg, SShowObj *pShow, char *data, int32_t rows);
+static void     mndCancelGetNextMnode(SMnode *pMnode, void *pIter);
+
+int32_t mndInitMnode(SMnode *pMnode) {
+  SSdbTable table = {.sdbType = SDB_MNODE,
+                     .keyType = SDB_KEY_INT32,
+                     .deployFp = (SdbDeployFp)mndCreateDefaultMnode,
+                     .encodeFp = (SdbEncodeFp)mndMnodeActionEncode,
+                     .decodeFp = (SdbDecodeFp)mndMnodeActionDecode,
+                     .insertFp = (SdbInsertFp)mndMnodeActionInsert,
+                     .updateFp = (SdbUpdateFp)mndMnodeActionUpdate,
+                     .deleteFp = (SdbDeleteFp)mndMnodeActionDelete};
+
+  mndSetMsgHandle(pMnode, TSDB_MSG_TYPE_CREATE_MNODE, mndProcessCreateMnodeMsg);
+  mndSetMsgHandle(pMnode, TSDB_MSG_TYPE_DROP_MNODE, mndProcessDropMnodeMsg);
+  mndSetMsgHandle(pMnode, TSDB_MSG_TYPE_CREATE_MNODE_IN_RSP, mndProcessCreateMnodeRsp);
+  mndSetMsgHandle(pMnode, TSDB_MSG_TYPE_DROP_MNODE_IN_RSP, mndProcessDropMnodeRsp);
+
+  mndAddShowMetaHandle(pMnode, TSDB_MGMT_TABLE_MNODE, mndGetMnodeMeta);
+  mndAddShowRetrieveHandle(pMnode, TSDB_MGMT_TABLE_MNODE, mndRetrieveMnodes);
+  mndAddShowFreeIterHandle(pMnode, TSDB_MGMT_TABLE_MNODE, mndCancelGetNextMnode);
+
+  return sdbSetTable(pMnode->pSdb, table);
+}
+
+void mndCleanupMnode(SMnode *pMnode) {}
+
+static SMnodeObj *mndAcquireMnode(SMnode *pMnode, int32_t mnodeId) {
+  SSdb *pSdb = pMnode->pSdb;
+  return sdbAcquire(pSdb, SDB_MNODE, &mnodeId);
+}
+
+static void mndReleaseMnode(SMnode *pMnode, SMnodeObj *pMnodeObj) {
+  SSdb *pSdb = pMnode->pSdb;
+  sdbRelease(pSdb, pMnodeObj);
+}
+
+char *mndGetRoleStr(int32_t showType) {
+  switch (showType) {
+    case TAOS_SYNC_STATE_FOLLOWER:
+      return "unsynced";
+    case TAOS_SYNC_STATE_CANDIDATE:
+      return "slave";
+    case TAOS_SYNC_STATE_LEADER:
+      return "master";
+    default:
+      return "undefined";
+  }
+}
+
+static int32_t mndCreateDefaultMnode(SMnode *pMnode) {
+  SMnodeObj mnodeObj = {0};
+  mnodeObj.id = 1;
+  mnodeObj.createdTime = taosGetTimestampMs();
+  mnodeObj.updateTime = mnodeObj.createdTime;
+
+  SSdbRaw *pRaw = mndMnodeActionEncode(&mnodeObj);
+  if (pRaw == NULL) return -1;
+  sdbSetRawStatus(pRaw, SDB_STATUS_READY);
+
+  mDebug("mnode:%d, will be created while deploy sdb", mnodeObj.id);
+  return sdbWrite(pMnode->pSdb, pRaw);
+}
+
 static SSdbRaw *mndMnodeActionEncode(SMnodeObj *pMnodeObj) {
   SSdbRaw *pRaw = sdbAllocRaw(SDB_MNODE, SDB_MNODE_VER, sizeof(SMnodeObj));
   if (pRaw == NULL) return NULL;
@@ -81,50 +159,14 @@ static int32_t mndMnodeActionDelete(SSdb *pSdb, SMnodeObj *pMnodeObj) {
   return 0;
 }
 
-static int32_t mndMnodeActionUpdate(SSdb *pSdb, SMnodeObj *pSrcMnode, SMnodeObj *pDstMnode) {
-  mTrace("mnode:%d, perform update action", pSrcMnode->id);
-  pSrcMnode->id = pDstMnode->id;
-  pSrcMnode->createdTime = pDstMnode->createdTime;
-  pSrcMnode->updateTime = pDstMnode->updateTime;
+static int32_t mndMnodeActionUpdate(SSdb *pSdb, SMnodeObj *pOldMnode, SMnodeObj *pNewMnode) {
+  mTrace("mnode:%d, perform update action", pOldMnode->id);
+  pOldMnode->id = pNewMnode->id;
+  pOldMnode->createdTime = pNewMnode->createdTime;
+  pOldMnode->updateTime = pNewMnode->updateTime;
   return 0;
 }
 
-static int32_t mndCreateDefaultMnode(SMnode *pMnode) {
-  SMnodeObj mnodeObj = {0};
-  mnodeObj.id = 1;
-  mnodeObj.createdTime = taosGetTimestampMs();
-  mnodeObj.updateTime = mnodeObj.createdTime;
-
-  SSdbRaw *pRaw = mndMnodeActionEncode(&mnodeObj);
-  if (pRaw == NULL) return -1;
-  sdbSetRawStatus(pRaw, SDB_STATUS_READY);
-
-  mTrace("mnode:%d, will be created while deploy sdb", mnodeObj.id);
-  return sdbWrite(pMnode->pSdb, pRaw);
-}
-
-static int32_t mndProcessCreateMnodeMsg(SMnodeMsg *pMsg) { return 0; }
-
-static int32_t mndProcessDropMnodeMsg(SMnodeMsg *pMsg) { return 0; }
-
-int32_t mndInitMnode(SMnode *pMnode) {
-  SSdbTable table = {.sdbType = SDB_MNODE,
-                     .keyType = SDB_KEY_INT32,
-                     .deployFp = (SdbDeployFp)mndCreateDefaultMnode,
-                     .encodeFp = (SdbEncodeFp)mndMnodeActionEncode,
-                     .decodeFp = (SdbDecodeFp)mndMnodeActionDecode,
-                     .insertFp = (SdbInsertFp)mndMnodeActionInsert,
-                     .updateFp = (SdbUpdateFp)mndMnodeActionUpdate,
-                     .deleteFp = (SdbDeleteFp)mndMnodeActionDelete};
-
-  mndSetMsgHandle(pMnode, TSDB_MSG_TYPE_CREATE_MNODE, mndProcessCreateMnodeMsg);
-  mndSetMsgHandle(pMnode, TSDB_MSG_TYPE_DROP_MNODE, mndProcessDropMnodeMsg);
-
-  return sdbSetTable(pMnode->pSdb, table);
-}
-
-void mndCleanupMnode(SMnode *pMnode) {}
-
 bool mndIsMnode(SMnode *pMnode, int32_t dnodeId) {
   SSdb *pSdb = pMnode->pSdb;
 
@@ -157,4 +199,271 @@ void mndGetMnodeEpSet(SMnode *pMnode, SEpSet *pEpSet) {
 
     pEpSet->numOfEps++;
   }
-}
+}
\ No newline at end of file
+
+static int32_t mndCreateMnode(SMnode *pMnode, SMnodeMsg *pMsg, SCreateMnodeMsg *pCreate) {
+  SMnodeObj mnodeObj = {0};
+  mnodeObj.id = 1;  // todo
+  mnodeObj.createdTime = taosGetTimestampMs();
+  mnodeObj.updateTime = mnodeObj.createdTime;
+
+  STrans *pTrans = mndTransCreate(pMnode, TRN_POLICY_ROLLBACK, pMsg->rpcMsg.handle);
+  if (pTrans == NULL) {
+    mError("dnode:%d, failed to create since %s", pCreate->dnodeId, terrstr());
+    return -1;
+  }
+  mDebug("trans:%d, used to create dnode:%d", pTrans->id, pCreate->dnodeId);
+
+  SSdbRaw *pRedoRaw = mndMnodeActionEncode(&mnodeObj);
+  if (pRedoRaw == NULL || mndTransAppendRedolog(pTrans, pRedoRaw) != 0) {
+    mError("trans:%d, failed to append redo log since %s", pTrans->id, terrstr());
+    mndTransDrop(pTrans);
+    return -1;
+  }
+  sdbSetRawStatus(pRedoRaw, SDB_STATUS_CREATING);
+
+  SSdbRaw *pUndoRaw = mndMnodeActionEncode(&mnodeObj);
+  if (pUndoRaw == NULL || mndTransAppendUndolog(pTrans, pUndoRaw) != 0) {
+    mError("trans:%d, failed to append undo log since %s", pTrans->id, terrstr());
+    mndTransDrop(pTrans);
+    return -1;
+  }
+  sdbSetRawStatus(pUndoRaw, SDB_STATUS_DROPPED);
+
+  SSdbRaw *pCommitRaw = mndMnodeActionEncode(&mnodeObj);
+  if (pCommitRaw == NULL || mndTransAppendCommitlog(pTrans, pCommitRaw) != 0) {
+    mError("trans:%d, failed to append commit log since %s", pTrans->id, terrstr());
+    mndTransDrop(pTrans);
+    return -1;
+  }
+  sdbSetRawStatus(pCommitRaw, SDB_STATUS_READY);
+
+  if (mndTransPrepare(pTrans) != 0) {
+    mError("trans:%d, failed to prepare since %s", pTrans->id, terrstr());
+    mndTransDrop(pTrans);
+    return -1;
+  }
+
+  mndTransDrop(pTrans);
+  return 0;
+}
+
+static int32_t mndProcessCreateMnodeMsg(SMnodeMsg *pMsg) {
+  SMnode          *pMnode = pMsg->pMnode;
+  SCreateMnodeMsg *pCreate = pMsg->rpcMsg.pCont;
+
+  pCreate->dnodeId = htonl(pCreate->dnodeId);
+
+  mDebug("mnode:%d, start to create", pCreate->dnodeId);
+
+  SDnodeObj *pDnode = mndAcquireDnode(pMnode, pCreate->dnodeId);
+  if (pDnode == NULL) {
+    mError("mnode:%d, dnode not exist", pDnode->id);
+    terrno = TSDB_CODE_MND_DNODE_NOT_EXIST;
+    return -1;
+  }
+  mndReleaseDnode(pMnode, pDnode);
+
+  SMnodeObj *pMnodeObj = mndAcquireMnode(pMnode, pCreate->dnodeId);
+  if (pMnodeObj != NULL) {
+    mError("mnode:%d, mnode already exist", pMnodeObj->id);
+    terrno = TSDB_CODE_MND_MNODE_ALREADY_EXIST;
+    return -1;
+  }
+
+  int32_t code = mndCreateMnode(pMnode, pMsg, pCreate);
+
+  if (code != 0) {
+    mError("mnode:%d, failed to create since %s", pCreate->dnodeId, terrstr());
+    return -1;
+  }
+
+  return TSDB_CODE_MND_ACTION_IN_PROGRESS;
+}
+
+static int32_t mndDropMnode(SMnode *pMnode, SMnodeMsg *pMsg, SMnodeObj *pMnodeObj) {
+  STrans *pTrans = mndTransCreate(pMnode, TRN_POLICY_ROLLBACK, pMsg->rpcMsg.handle);
+  if (pTrans == NULL) {
+    mError("mnode:%d, failed to drop since %s", pMnodeObj->id, terrstr());
+    return -1;
+  }
+  mDebug("trans:%d, used to drop user:%d", pTrans->id, pMnodeObj->id);
+
+  SSdbRaw *pRedoRaw = mndMnodeActionEncode(pMnodeObj);
+  if (pRedoRaw == NULL || mndTransAppendRedolog(pTrans, pRedoRaw) != 0) {
+    mError("trans:%d, failed to append redo log since %s", pTrans->id, terrstr());
+    mndTransDrop(pTrans);
+    return -1;
+  }
+  sdbSetRawStatus(pRedoRaw, SDB_STATUS_DROPPING);
+
+  SSdbRaw *pUndoRaw = mndMnodeActionEncode(pMnodeObj);
+  if (pUndoRaw == NULL || mndTransAppendUndolog(pTrans, pUndoRaw) != 0) {
+    mError("trans:%d, failed to append undo log since %s", pTrans->id, terrstr());
+    mndTransDrop(pTrans);
+    return -1;
+  }
+  sdbSetRawStatus(pUndoRaw, SDB_STATUS_READY);
+
+  SSdbRaw *pCommitRaw = mndMnodeActionEncode(pMnodeObj);
+  if (pCommitRaw == NULL || mndTransAppendCommitlog(pTrans, pCommitRaw) != 0) {
+    mError("trans:%d, failed to append commit log since %s", pTrans->id, terrstr());
+    mndTransDrop(pTrans);
+    return -1;
+  }
+  sdbSetRawStatus(pCommitRaw, SDB_STATUS_DROPPED);
+
+  if (mndTransPrepare(pTrans) != 0) {
+    mError("trans:%d, failed to prepare since %s", pTrans->id, terrstr());
+    mndTransDrop(pTrans);
+    return -1;
+  }
+
+  mndTransDrop(pTrans);
+  return 0;
+}
+
+static int32_t mndProcessDropMnodeMsg(SMnodeMsg *pMsg) {
+  SMnode        *pMnode = pMsg->pMnode;
+  SDropMnodeMsg *pDrop = pMsg->rpcMsg.pCont;
+  pDrop->dnodeId = htonl(pDrop->dnodeId);
+
+  mDebug("mnode:%d, start to drop", pDrop->dnodeId);
+
+  if (pDrop->dnodeId <= 0) {
+    terrno = TSDB_CODE_SDB_APP_ERROR;
+    mError("mnode:%d, failed to drop since %s", pDrop->dnodeId, terrstr());
+    return -1;
+  }
+
+  SMnodeObj *pMnodeObj = mndAcquireMnode(pMnode, pDrop->dnodeId);
+  if (pMnodeObj == NULL) {
+    mError("mnode:%d, not exist", pDrop->dnodeId);
+    terrno = TSDB_CODE_MND_DNODE_NOT_EXIST;
+    return -1;
+  }
+
+  int32_t code = mndDropMnode(pMnode, pMsg, pMnodeObj);
+
+  if (code != 0) {
+    mError("mnode:%d, failed to drop since %s", pMnode->dnodeId, terrstr());
+    return -1;
+  }
+
+  sdbRelease(pMnode->pSdb, pMnode);
+  return TSDB_CODE_MND_ACTION_IN_PROGRESS;
+}
+
+static int32_t mndProcessCreateMnodeRsp(SMnodeMsg *pMsg) { return 0; }
+
+static int32_t mndProcessDropMnodeRsp(SMnodeMsg *pMsg) { return 0; }
+
+static int32_t mndGetMnodeMeta(SMnodeMsg *pMsg, SShowObj *pShow, STableMetaMsg *pMeta) {
+  SMnode *pMnode = pMsg->pMnode;
+  SSdb   *pSdb = pMnode->pSdb;
+
+  int32_t  cols = 0;
+  SSchema *pSchema = pMeta->pSchema;
+
+  pShow->bytes[cols] = 2;
+  pSchema[cols].type = TSDB_DATA_TYPE_SMALLINT;
+  strcpy(pSchema[cols].name, "id");
+  pSchema[cols].bytes = htons(pShow->bytes[cols]);
+  cols++;
+
+  pShow->bytes[cols] = TSDB_EP_LEN + VARSTR_HEADER_SIZE;
+  pSchema[cols].type = TSDB_DATA_TYPE_BINARY;
+  strcpy(pSchema[cols].name, "end point");
+  pSchema[cols].bytes = htons(pShow->bytes[cols]);
+  cols++;
+
+  pShow->bytes[cols] = 12 + VARSTR_HEADER_SIZE;
+  pSchema[cols].type = TSDB_DATA_TYPE_BINARY;
+  strcpy(pSchema[cols].name, "role");
+  pSchema[cols].bytes = htons(pShow->bytes[cols]);
+  cols++;
+
+  pShow->bytes[cols] = 8;
+  pSchema[cols].type = TSDB_DATA_TYPE_TIMESTAMP;
+  strcpy(pSchema[cols].name, "role time");
+  pSchema[cols].bytes = htons(pShow->bytes[cols]);
+  cols++;
+
+  pShow->bytes[cols] = 8;
+  pSchema[cols].type = TSDB_DATA_TYPE_TIMESTAMP;
+  strcpy(pSchema[cols].name, "create time");
+  pSchema[cols].bytes = htons(pShow->bytes[cols]);
+  cols++;
+
+  pMeta->numOfColumns = htons(cols);
+  pShow->numOfColumns = cols;
+
+  pShow->offset[0] = 0;
+  for (int32_t i = 1; i < cols; ++i) {
+    pShow->offset[i] = pShow->offset[i - 1] + pShow->bytes[i - 1];
+  }
+
+  pShow->numOfRows = sdbGetSize(pSdb, SDB_MNODE);
+  pShow->rowSize = pShow->offset[cols - 1] + pShow->bytes[cols - 1];
+  strcpy(pMeta->tableFname, mndShowStr(pShow->type));
+
+  return 0;
+}
+
+static int32_t mndRetrieveMnodes(SMnodeMsg *pMsg, SShowObj *pShow, char *data, int32_t rows) {
+  SMnode    *pMnode = pMsg->pMnode;
+  SSdb      *pSdb = pMnode->pSdb;
+  int32_t    numOfRows = 0;
+  int32_t    cols = 0;
+  SMnodeObj *pMnodeObj = NULL;
+  char      *pWrite;
+
+  while (numOfRows < rows) {
+    pShow->pIter = sdbFetch(pSdb, SDB_MNODE, pShow->pIter, (void **)&pMnodeObj);
+    if (pShow->pIter == NULL) break;
+
+    cols = 0;
+
+    pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
+    *(int16_t *)pWrite = pMnodeObj->id;
+    cols++;
+
+    pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
+
+    SDnodeObj *pDnode = mndAcquireDnode(pMnode, pMnodeObj->id);
+    if (pDnode != NULL) {
+      STR_WITH_MAXSIZE_TO_VARSTR(pWrite, pDnode->ep, pShow->bytes[cols]);
+    } else {
+      STR_WITH_MAXSIZE_TO_VARSTR(pWrite, "invalid ep", pShow->bytes[cols]);
+    }
+    mndReleaseDnode(pMnode, pDnode);
+
+    cols++;
+
+    pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
+    char *roles = mndGetRoleStr(pMnodeObj->role);
+    STR_WITH_MAXSIZE_TO_VARSTR(pWrite, roles, pShow->bytes[cols]);
+    cols++;
+
+    pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
+    *(int64_t *)pWrite = pMnodeObj->roleTime;
+    cols++;
+
+    pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
+    *(int64_t *)pWrite = pMnodeObj->createdTime;
+    cols++;
+
+    numOfRows++;
+    sdbRelease(pSdb, pMnodeObj);
+  }
+
+  mnodeVacuumResult(data, pShow->numOfColumns, numOfRows, rows, pShow);
+  pShow->numOfReads += numOfRows;
+
+  return numOfRows;
+}
+
+static void mndCancelGetNextMnode(SMnode *pMnode, void *pIter) {
+  SSdb *pSdb = pMnode->pSdb;
+  sdbCancelFetch(pSdb, pIter);
+}

source/dnode/mnode/impl/src/mndOper.c

-/*
- * Copyright (c) 2019 TAOS Data, Inc. <jhtao@taosdata.com>
- *
- * This program is free software: you can use, redistribute, and/or modify
- * it under the terms of the GNU Affero General Public License, version 3
- * or later ("AGPL"), as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.
- *
- * You should have received a copy of the GNU Affero General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
-
-#define _DEFAULT_SOURCE
-#include "os.h"
-#include "mndInt.h"
-
-int32_t mndInitOper(SMnode *pMnode) { return 0; }
-void    mndCleanupOper(SMnode *pMnode) {}
\ No newline at end of file

source/dnode/mnode/impl/src/mndProfile.c

@@ -467,7 +467,7 @@ static int32_t mndGetConnsMeta(SMnodeMsg *pMsg, SShowObj *pShow, STableMetaMsg *
   mndReleaseUser(pMnode, pUser);
 
   int32_t  cols = 0;
-  SSchema *pSchema = pMeta->schema;
+  SSchema *pSchema = pMeta->pSchema;
 
   pShow->bytes[cols] = 4;
   pSchema[cols].type = TSDB_DATA_TYPE_INT;
@@ -595,7 +595,7 @@ static int32_t mndGetQueryMeta(SMnodeMsg *pMsg, SShowObj *pShow, STableMetaMsg *
   mndReleaseUser(pMnode, pUser);
 
   int32_t  cols = 0;
-  SSchema *pSchema = pMeta->schema;
+  SSchema *pSchema = pMeta->pSchema;
 
   pShow->bytes[cols] = 4;
   pSchema[cols].type = TSDB_DATA_TYPE_INT;
@@ -811,7 +811,7 @@ static int32_t mndGetStreamMeta(SMnodeMsg *pMsg, SShowObj *pShow, STableMetaMsg
   mndReleaseUser(pMnode, pUser);
 
   int32_t  cols = 0;
-  SSchema *pSchema = pMeta->schema;
+  SSchema *pSchema = pMeta->pSchema;
 
   pShow->bytes[cols] = 4;
   pSchema[cols].type = TSDB_DATA_TYPE_INT;

source/dnode/mnode/impl/src/mndShow.c

@@ -20,7 +20,6 @@ static SShowObj *mndCreateShowObj(SMnode *pMnode, SShowMsg *pMsg);
 static void      mndFreeShowObj(SShowObj *pShow);
 static SShowObj *mndAcquireShowObj(SMnode *pMnode, int32_t showId);
 static void      mndReleaseShowObj(SShowObj *pShow, bool forceRemove);
-static char     *mndShowStr(int32_t showType);
 static int32_t   mndProcessShowMsg(SMnodeMsg *pMnodeMsg);
 static int32_t   mndProcessRetrieveMsg(SMnodeMsg *pMsg);
 static bool      mndCheckRetrieveFinished(SShowObj *pShow);
@@ -88,10 +87,6 @@ static void mndFreeShowObj(SShowObj *pShow) {
 
   ShowFreeIterFp freeFp = pMgmt->freeIterFps[pShow->type];
   if (freeFp != NULL) {
-    if (pShow->pVgIter != NULL) {
-      // only used in 'show vnodes "ep"'
-      (*freeFp)(pMnode, pShow->pVgIter);
-    }
     if (pShow->pIter != NULL) {
       (*freeFp)(pMnode, pShow->pIter);
     }
@@ -259,7 +254,7 @@ static int32_t mndProcessRetrieveMsg(SMnodeMsg *pMnodeMsg) {
   return TSDB_CODE_SUCCESS;
 }
 
-static char *mndShowStr(int32_t showType) {
+char *mndShowStr(int32_t showType) {
   switch (showType) {
     case TSDB_MGMT_TABLE_ACCT:
       return "show accounts";
@@ -275,7 +270,7 @@ static char *mndShowStr(int32_t showType) {
       return "show mnodes";
     case TSDB_MGMT_TABLE_VGROUP:
       return "show vgroups";
-    case TSDB_MGMT_TABLE_METRIC:
+    case TSDB_MGMT_TABLE_STABLE:
       return "show stables";
     case TSDB_MGMT_TABLE_MODULE:
       return "show modules";

source/dnode/mnode/impl/src/mndStable.c

@@ -14,8 +14,414 @@
  */
 
 #define _DEFAULT_SOURCE
-#include "os.h"
-#include "mndInt.h"
+#include "mndStable.h"
+#include "mndDnode.h"
+#include "mndMnode.h"
+#include "mndShow.h"
+#include "mndTrans.h"
+#include "mndUser.h"
+#include "mndDb.h"
+#include "tname.h"
 
-int32_t mndInitStable(SMnode *pMnode) { return 0; }
-void    mndCleanupStable(SMnode *pMnode) {}
+#define TSDB_STABLE_VER_NUM 1
+#define TSDB_STABLE_RESERVE_SIZE 64
\ No newline at end of file
+
+static SSdbRaw *mndStableActionEncode(SStableObj *pStb);
+static SSdbRow *mndStableActionDecode(SSdbRaw *pRaw);
+static int32_t  mndStableActionInsert(SSdb *pSdb, SStableObj *pStb);
+static int32_t  mndStableActionDelete(SSdb *pSdb, SStableObj *pStb);
+static int32_t  mndStableActionUpdate(SSdb *pSdb, SStableObj *pOldStb, SStableObj *pNewStb);
+static int32_t  mndProcessCreateStableMsg(SMnodeMsg *pMsg);
+static int32_t  mndProcessAlterStableMsg(SMnodeMsg *pMsg);
+static int32_t  mndProcessDropStableMsg(SMnodeMsg *pMsg);
+static int32_t  mndProcessCreateStableInRsp(SMnodeMsg *pMsg);
+static int32_t  mndProcessAlterStableInRsp(SMnodeMsg *pMsg);
+static int32_t  mndProcessDropStableInRsp(SMnodeMsg *pMsg);
+static int32_t  mndProcessStableMetaMsg(SMnodeMsg *pMsg);
+static int32_t  mndGetStableMeta(SMnodeMsg *pMsg, SShowObj *pShow, STableMetaMsg *pMeta);
+static int32_t  mndRetrieveStables(SMnodeMsg *pMsg, SShowObj *pShow, char *data, int32_t rows);
+static void     mndCancelGetNextStable(SMnode *pMnode, void *pIter);
+
+int32_t mndInitStable(SMnode *pMnode) {
+  SSdbTable table = {.sdbType = SDB_STABLE,
+                     .keyType = SDB_KEY_BINARY,
+                     .encodeFp = (SdbEncodeFp)mndStableActionEncode,
+                     .decodeFp = (SdbDecodeFp)mndStableActionDecode,
+                     .insertFp = (SdbInsertFp)mndStableActionInsert,
+                     .updateFp = (SdbUpdateFp)mndStableActionUpdate,
+                     .deleteFp = (SdbDeleteFp)mndStableActionDelete};
+
+  mndSetMsgHandle(pMnode, TSDB_MSG_TYPE_CREATE_STABLE, mndProcessCreateStableMsg);
+  mndSetMsgHandle(pMnode, TSDB_MSG_TYPE_ALTER_STABLE, mndProcessAlterStableMsg);
+  mndSetMsgHandle(pMnode, TSDB_MSG_TYPE_DROP_STABLE, mndProcessDropStableMsg);
+  mndSetMsgHandle(pMnode, TSDB_MSG_TYPE_CREATE_STABLE_IN_RSP, mndProcessCreateStableInRsp);
+  mndSetMsgHandle(pMnode, TSDB_MSG_TYPE_ALTER_STABLE_IN_RSP, mndProcessAlterStableInRsp);
+  mndSetMsgHandle(pMnode, TSDB_MSG_TYPE_DROP_STABLE_IN_RSP, mndProcessDropStableInRsp);
+  mndSetMsgHandle(pMnode, TSDB_MSG_TYPE_TABLE_META, mndProcessStableMetaMsg);
+
+  mndAddShowMetaHandle(pMnode, TSDB_MGMT_TABLE_STABLE, mndGetStableMeta);
+  mndAddShowRetrieveHandle(pMnode, TSDB_MGMT_TABLE_STABLE, mndRetrieveStables);
+  mndAddShowFreeIterHandle(pMnode, TSDB_MGMT_TABLE_STABLE, mndCancelGetNextStable);
+
+  return sdbSetTable(pMnode->pSdb, table);
+}
+
+void mndCleanupStable(SMnode *pMnode) {}
+
+static SSdbRaw *mndStableActionEncode(SStableObj *pStb) {
+  int32_t  size = sizeof(SStableObj) + (pStb->numOfColumns + pStb->numOfTags) * sizeof(SSchema);
+  SSdbRaw *pRaw = sdbAllocRaw(SDB_STABLE, TSDB_STABLE_VER_NUM, size);
+  if (pRaw == NULL) return NULL;
+
+  int32_t dataPos = 0;
+  SDB_SET_BINARY(pRaw, dataPos, pStb->name, TSDB_TABLE_NAME_LEN)
+  SDB_SET_INT64(pRaw, dataPos, pStb->createdTime)
+  SDB_SET_INT64(pRaw, dataPos, pStb->updateTime)
+  SDB_SET_INT64(pRaw, dataPos, pStb->uid)
+  SDB_SET_INT64(pRaw, dataPos, pStb->version)
+  SDB_SET_INT32(pRaw, dataPos, pStb->numOfColumns)
+  SDB_SET_INT32(pRaw, dataPos, pStb->numOfTags)
+
+  for (int32_t i = 0; i < pStb->numOfColumns; ++i) {
+    SSchema *pSchema = &pStb->columnSchema[i];
+    SDB_SET_INT8(pRaw, dataPos, pSchema->type);
+    SDB_SET_INT32(pRaw, dataPos, pSchema->colId);
+    SDB_SET_INT32(pRaw, dataPos, pSchema->bytes);
+    SDB_SET_BINARY(pRaw, dataPos, pSchema->name, TSDB_COL_NAME_LEN);
+  }
+
+  for (int32_t i = 0; i < pStb->numOfTags; ++i) {
+    SSchema *pSchema = &pStb->tagSchema[i];
+    SDB_SET_INT8(pRaw, dataPos, pSchema->type);
+    SDB_SET_INT32(pRaw, dataPos, pSchema->colId);
+    SDB_SET_INT32(pRaw, dataPos, pSchema->bytes);
+    SDB_SET_BINARY(pRaw, dataPos, pSchema->name, TSDB_COL_NAME_LEN);
+  }
+
+  SDB_SET_RESERVE(pRaw, dataPos, TSDB_STABLE_RESERVE_SIZE)
+  SDB_SET_DATALEN(pRaw, dataPos);
+
+  return pRaw;
+}
+
+static SSdbRow *mndStableActionDecode(SSdbRaw *pRaw) {
+  int8_t sver = 0;
+  if (sdbGetRawSoftVer(pRaw, &sver) != 0) return NULL;
+
+  if (sver != TSDB_STABLE_VER_NUM) {
+    mError("failed to decode stable since %s", terrstr());
+    terrno = TSDB_CODE_SDB_INVALID_DATA_VER;
+    return NULL;
+  }
+
+  int32_t     size = sizeof(SStableObj) + TSDB_MAX_COLUMNS * sizeof(SSchema);
+  SSdbRow    *pRow = sdbAllocRow(size);
+  SStableObj *pStb = sdbGetRowObj(pRow);
+  if (pStb == NULL) return NULL;
+
+  int32_t dataPos = 0;
+  SDB_GET_BINARY(pRaw, pRow, dataPos, pStb->name, TSDB_TABLE_NAME_LEN)
+  SDB_GET_INT64(pRaw, pRow, dataPos, &pStb->createdTime)
+  SDB_GET_INT64(pRaw, pRow, dataPos, &pStb->updateTime)
+  SDB_GET_INT64(pRaw, pRow, dataPos, &pStb->uid)
+  SDB_GET_INT32(pRaw, pRow, dataPos, &pStb->version)
+  SDB_GET_INT32(pRaw, pRow, dataPos, &pStb->numOfColumns)
+  SDB_GET_INT32(pRaw, pRow, dataPos, &pStb->numOfTags)
+
+  pStb->columnSchema = calloc(pStb->numOfColumns, sizeof(SSchema));
+  pStb->tagSchema = calloc(pStb->numOfTags, sizeof(SSchema));
+
+  for (int32_t i = 0; i < pStb->numOfColumns; ++i) {
+    SSchema *pSchema = &pStb->columnSchema[i];
+    SDB_GET_INT8(pRaw, pRow, dataPos, &pSchema->type);
+    SDB_GET_INT32(pRaw, pRow, dataPos, &pSchema->colId);
+    SDB_GET_INT32(pRaw, pRow, dataPos, &pSchema->bytes);
+    SDB_GET_BINARY(pRaw, pRow, dataPos, pSchema->name, TSDB_COL_NAME_LEN);
+  }
+
+  for (int32_t i = 0; i < pStb->numOfTags; ++i) {
+    SSchema *pSchema = &pStb->tagSchema[i];
+    SDB_GET_INT8(pRaw, pRow, dataPos, &pSchema->type);
+    SDB_GET_INT32(pRaw, pRow, dataPos, &pSchema->colId);
+    SDB_GET_INT32(pRaw, pRow, dataPos, &pSchema->bytes);
+    SDB_GET_BINARY(pRaw, pRow, dataPos, pSchema->name, TSDB_COL_NAME_LEN);
+  }
+
+  SDB_GET_RESERVE(pRaw, pRow, dataPos, TSDB_STABLE_RESERVE_SIZE)
+
+  return pRow;
+}
+
+static int32_t mndStableActionInsert(SSdb *pSdb, SStableObj *pStb) {
+  mTrace("stable:%s, perform insert action", pStb->name);
+  return 0;
+}
+
+static int32_t mndStableActionDelete(SSdb *pSdb, SStableObj *pStb) {
+  mTrace("stable:%s, perform delete action", pStb->name);
+  return 0;
+}
+
+static int32_t mndStableActionUpdate(SSdb *pSdb, SStableObj *pOldStb, SStableObj *pNewStb) {
+  mTrace("stable:%s, perform update action", pOldStb->name);
+  atomic_exchange_32(&pOldStb->updateTime, pNewStb->updateTime);
+  atomic_exchange_32(&pOldStb->version, pNewStb->version);
+
+  taosWLockLatch(&pOldStb->lock);
+  int32_t numOfTags = pNewStb->numOfTags;
+  int32_t tagSize = numOfTags * sizeof(SSchema);
+  int32_t numOfColumns = pNewStb->numOfColumns;
+  int32_t columnSize = numOfColumns * sizeof(SSchema);
+
+  if (pOldStb->numOfTags < numOfTags) {
+    pOldStb->tagSchema = malloc(tagSize);
+  }
+  if (pOldStb->numOfColumns < numOfColumns) {
+    pOldStb->columnSchema = malloc(columnSize);
+  }
+
+  memcpy(pOldStb->tagSchema, pNewStb->tagSchema, tagSize);
+  memcpy(pOldStb->columnSchema, pNewStb->columnSchema, columnSize);
+  taosWUnLockLatch(&pOldStb->lock);
+  return 0;
+}
+
+SStableObj *mndAcquireStb(SMnode *pMnode, char *stbName) {
+  SSdb *pSdb = pMnode->pSdb;
+  return sdbAcquire(pSdb, SDB_STABLE, stbName);
+}
+
+void mndReleaseStb(SMnode *pMnode, SStableObj *pStb) {
+  SSdb *pSdb = pMnode->pSdb;
+  sdbRelease(pSdb, pStb);
+}
+
+static int32_t mndProcessCreateStableMsg(SMnodeMsg *pMsg) { return 0; }
+
+static int32_t mndProcessCreateStableInRsp(SMnodeMsg *pMsg) { return 0; }
+
+static int32_t mndProcessAlterStableMsg(SMnodeMsg *pMsg) { return 0; }
+
+static int32_t mndProcessAlterStableInRsp(SMnodeMsg *pMsg) { return 0; }
+
+static int32_t mndProcessDropStableMsg(SMnodeMsg *pMsg) { return 0; }
+
+static int32_t mndProcessDropStableInRsp(SMnodeMsg *pMsg) { return 0; }
+
+static SDbObj *mndGetDbByStbName(SMnode *pMnode, char *stbName) {
+  SName name = {0};
+  tNameFromString(&name, stbName, T_NAME_ACCT | T_NAME_DB | T_NAME_TABLE);
+
+  char db[TSDB_TABLE_FNAME_LEN] = {0};
+  tNameGetFullDbName(&name, db);
+
+  return mndAcquireDb(pMnode, db);
+}
+
+static int32_t mndProcessStableMetaMsg(SMnodeMsg *pMsg) {
+  SMnode         *pMnode = pMsg->pMnode;
+  SStableInfoMsg *pInfo = pMsg->rpcMsg.pCont;
+
+  mDebug("stable:%s, start to retrieve meta", pInfo->name);
+
+  SDbObj *pDb = mndGetDbByStbName(pMnode, pInfo->name);
+  if (pDb == NULL) {
+    terrno = TSDB_CODE_MND_DB_NOT_SELECTED;
+    mError("stable:%s, failed to retrieve meta since %s", pInfo->name, terrstr());
+    return -1;
+  }
+
+  SStableObj *pStb = mndAcquireStb(pMnode, pInfo->name);
+  if (pStb == NULL) {
+    mndReleaseDb(pMnode, pDb);
+    terrno = TSDB_CODE_MND_INVALID_TABLE_NAME;
+    mError("stable:%s, failed to get meta since %s", pInfo->name, terrstr());
+    return -1;
+  }
+
+  int32_t        contLen = sizeof(STableMetaMsg) + (pStb->numOfColumns + pStb->numOfTags) * sizeof(SSchema);
+  STableMetaMsg *pMeta = rpcMallocCont(contLen);
+  if (pMeta == NULL) {
+    terrno = TSDB_CODE_OUT_OF_MEMORY;
+    mError("stable:%s, failed to get meta since %s", pInfo->name, terrstr());
+    return -1;
+  }
+
+  memcpy(pMeta->stableFname, pStb->name, TSDB_TABLE_FNAME_LEN);
+  pMeta->numOfTags = htonl(pStb->numOfTags);
+  pMeta->numOfColumns = htonl(pStb->numOfColumns);
+  pMeta->precision = pDb->cfg.precision;
+  pMeta->tableType = TSDB_SUPER_TABLE;
+  pMeta->update = pDb->cfg.update;
+  pMeta->sversion = htonl(pStb->version);
+  pMeta->suid = htonl(pStb->uid);
+
+  for (int32_t i = 0; i < pStb->numOfColumns; ++i) {
+    SSchema *pSchema = &pMeta->pSchema[i];
+    SSchema *pColumn = &pStb->columnSchema[i];
+    memcpy(pSchema->name, pColumn->name, TSDB_COL_NAME_LEN);
+    pSchema->type = pColumn->type;
+    pSchema->colId = htonl(pColumn->colId);
+    pSchema->bytes = htonl(pColumn->bytes);
+  }
+
+  for (int32_t i = 0; i < pStb->numOfTags; ++i) {
+    SSchema *pSchema = &pMeta->pSchema[i + pStb->numOfColumns];
+    SSchema *pTag = &pStb->tagSchema[i];
+    memcpy(pSchema->name, pTag->name, TSDB_COL_NAME_LEN);
+    pSchema->type = pTag->type;
+    pSchema->colId = htons(pTag->colId);
+    pSchema->bytes = htonl(pTag->bytes);
+  }
+
+  pMsg->pCont = pMeta;
+  pMsg->contLen = contLen;
+
+  mDebug("stable:%s, meta is retrieved, cols:%d tags:%d", pInfo->name, pStb->numOfColumns, pStb->numOfTags);
+  return 0;
+}
+
+static int32_t mndGetNumOfStables(SMnode *pMnode, char *dbName, int32_t *pNumOfStables) {
+  SSdb *pSdb = pMnode->pSdb;
+
+  SDbObj *pDb = mndAcquireDb(pMnode, dbName);
+  if (pDb == NULL) {
+    terrno = TSDB_CODE_MND_DB_NOT_SELECTED;
+    return -1;
+  }
+
+  int32_t numOfStables = 0;
+  void   *pIter = NULL;
+  while (1) {
+    SStableObj *pStb = NULL;
+    pIter = sdbFetch(pSdb, SDB_VGROUP, pIter, (void **)&pStb);
+    if (pIter == NULL) break;
+
+    if (strcmp(pStb->db, dbName) == 0) {
+      numOfStables++;
+    }
+
+    sdbRelease(pSdb, pStb);
+  }
+
+  *pNumOfStables = numOfStables;
+  return 0;
+}
+
+static int32_t mndGetStableMeta(SMnodeMsg *pMsg, SShowObj *pShow, STableMetaMsg *pMeta) {
+  SMnode *pMnode = pMsg->pMnode;
+  SSdb   *pSdb = pMnode->pSdb;
+
+  if (mndGetNumOfStables(pMnode, pShow->db, &pShow->numOfRows) != 0) {
+    return -1;
+  }
+
+  int32_t  cols = 0;
+  SSchema *pSchema = pMeta->pSchema;
+
+  pShow->bytes[cols] = TSDB_TABLE_NAME_LEN + VARSTR_HEADER_SIZE;
+  pSchema[cols].type = TSDB_DATA_TYPE_BINARY;
+  strcpy(pSchema[cols].name, "name");
+  pSchema[cols].bytes = htons(pShow->bytes[cols]);
+  cols++;
+
+  pShow->bytes[cols] = 8;
+  pSchema[cols].type = TSDB_DATA_TYPE_TIMESTAMP;
+  strcpy(pSchema[cols].name, "create time");
+  pSchema[cols].bytes = htons(pShow->bytes[cols]);
+  cols++;
+
+  pShow->bytes[cols] = 2;
+  pSchema[cols].type = TSDB_DATA_TYPE_SMALLINT;
+  strcpy(pSchema[cols].name, "columns");
+  pSchema[cols].bytes = htons(pShow->bytes[cols]);
+  cols++;
+
+  pShow->bytes[cols] = 2;
+  pSchema[cols].type = TSDB_DATA_TYPE_SMALLINT;
+  strcpy(pSchema[cols].name, "tags");
+  pSchema[cols].bytes = htons(pShow->bytes[cols]);
+  cols++;
+
+  pMeta->numOfColumns = htons(cols);
+  pShow->numOfColumns = cols;
+
+  pShow->offset[0] = 0;
+  for (int32_t i = 1; i < cols; ++i) {
+    pShow->offset[i] = pShow->offset[i - 1] + pShow->bytes[i - 1];
+  }
+
+  pShow->rowSize = pShow->offset[cols - 1] + pShow->bytes[cols - 1];
+  strcpy(pMeta->tableFname, mndShowStr(pShow->type));
+
+  return 0;
+}
+
+static void mnodeExtractTableName(char* tableId, char* name) {
+  int pos = -1;
+  int num = 0;
+  for (pos = 0; tableId[pos] != 0; ++pos) {
+    if (tableId[pos] == '.') num++;
+    if (num == 2) break;
+  }
+
+  if (num == 2) {
+    strcpy(name, tableId + pos + 1);
+  }
+}
+
+static int32_t mndRetrieveStables(SMnodeMsg *pMsg, SShowObj *pShow, char *data, int32_t rows) {
+  SMnode     *pMnode = pMsg->pMnode;
+  SSdb       *pSdb = pMnode->pSdb;
+  int32_t     numOfRows = 0;
+  SStableObj *pStb = NULL;
+  int32_t     cols = 0;
+  char       *pWrite;
+  char        prefix[64] = {0};
+
+  tstrncpy(prefix, pShow->db, 64);
+  strcat(prefix, TS_PATH_DELIMITER);
+  int32_t prefixLen = (int32_t)strlen(prefix);
+
+  while (numOfRows < rows) {
+    pShow->pIter = sdbFetch(pSdb, SDB_STABLE, pShow->pIter, (void **)&pStb);
+    if (pShow->pIter == NULL) break;
+
+    if (strncmp(pStb->name, prefix, prefixLen) != 0) {
+      sdbRelease(pSdb, pStb);
+      continue;
+    }
+
+    cols = 0;
+
+    char stableName[TSDB_TABLE_FNAME_LEN] = {0};
+    memcpy(stableName, pStb->name + prefixLen, TSDB_TABLE_FNAME_LEN - prefixLen);
+    pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
+    STR_TO_VARSTR(pWrite, stableName);
+    cols++;
+
+    pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
+    *(int64_t *)pWrite = pStb->createdTime;
+    cols++;
+
+    pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
+    *(int16_t *)pWrite = pStb->numOfColumns;
+    cols++;
+
+    pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
+    *(int16_t *)pWrite = pStb->numOfTags;
+    cols++;
+
+    numOfRows++;
+    sdbRelease(pSdb, pStb);
+  }
+
+  pShow->numOfReads += numOfRows;
+  mnodeVacuumResult(data, pShow->numOfColumns, numOfRows, rows, pShow);
+  return numOfRows;
+}
+
+static void mndCancelGetNextStable(SMnode *pMnode, void *pIter) {
+  SSdb *pSdb = pMnode->pSdb;
+  sdbCancelFetch(pSdb, pIter);
+}
\ No newline at end of file

source/dnode/mnode/impl/src/mndSync.c

@@ -21,9 +21,15 @@
 int32_t mndInitSync(SMnode *pMnode) { return 0; }
 void    mndCleanupSync(SMnode *pMnode) {}
 
-int32_t mndSyncPropose(SMnode *pMnode, SSdbRaw *pRaw, void *pData) {
-  mndTransApply(pMnode, pData, pData, 0);
-  free(pData);
+int32_t mndSyncPropose(SMnode *pMnode, SSdbRaw *pRaw, STransMsg *pMsg) {
+  int32_t code = 0;
+
+  int32_t  len = sdbGetRawTotalSize(pRaw);
+  SSdbRaw *pReceived = calloc(1, len);
+  memcpy(pReceived, pRaw, len);
+  mDebug("trans:%d, data:%p recv from sync, code:0x%x pMsg:%p", pMsg->id, pReceived, code & 0xFFFF, pMsg);
+
+  mndTransApply(pMnode, pReceived, pMsg, code);
   return 0;
 }
 

source/dnode/mnode/impl/src/mndTelem.c

@@ -189,12 +189,12 @@ static void mndSendTelemetryReport(SMnode* pMnode) {
   char     buf[128] = {0};
   uint32_t ip = taosGetIpv4FromFqdn(TELEMETRY_SERVER);
   if (ip == 0xffffffff) {
-    mTrace("failed to get IP address of " TELEMETRY_SERVER " since :%s", strerror(errno));
+    mDebug("failed to get IP address of " TELEMETRY_SERVER " since :%s", strerror(errno));
     return;
   }
   SOCKET fd = taosOpenTcpClientSocket(ip, TELEMETRY_PORT, 0);
   if (fd < 0) {
-    mTrace("failed to create socket for telemetry, reason:%s", strerror(errno));
+    mDebug("failed to create socket for telemetry, reason:%s", strerror(errno));
     return;
   }
 
@@ -228,7 +228,7 @@ static void mndSendTelemetryReport(SMnode* pMnode) {
 
   // read something to avoid nginx error 499
   if (taosReadSocket(fd, buf, 10) < 0) {
-    mTrace("failed to receive response since %s", strerror(errno));
+    mDebug("failed to receive response since %s", strerror(errno));
   }
 
   taosCloseSocket(fd);
@@ -297,7 +297,7 @@ int32_t mndInitTelem(SMnode* pMnode) {
   int32_t code = pthread_create(&pMgmt->thread, &attr, mndTelemThreadFp, pMnode);
   pthread_attr_destroy(&attr);
   if (code != 0) {
-    mTrace("failed to create telemetry thread since :%s", strerror(code));
+    mDebug("failed to create telemetry thread since :%s", strerror(code));
   }
 
   mInfo("mnd telemetry is initialized");

source/dnode/mnode/impl/src/mndTrans.c

@@ -15,13 +15,33 @@
 
 #define _DEFAULT_SOURCE
 #include "mndTrans.h"
-#include "trpc.h"
+#include "mndSync.h"
 
 #define SDB_TRANS_VER 1
 #define TRN_DEFAULT_ARRAY_SIZE 8
 
-SSdbRaw *mndTransActionEncode(STrans *pTrans) {
-  int32_t rawDataLen = 10 * sizeof(int32_t);
+static SSdbRaw *mndTransActionEncode(STrans *pTrans);
+static SSdbRow *mndTransActionDecode(SSdbRaw *pRaw);
+static int32_t  mndTransActionInsert(SSdb *pSdb, STrans *pTrans);
+static int32_t  mndTransActionUpdate(SSdb *pSdb, STrans *OldTrans, STrans *pOldTrans);
+static int32_t  mndTransActionDelete(SSdb *pSdb, STrans *pTrans);
+
+int32_t mndInitTrans(SMnode *pMnode) {
+  SSdbTable table = {.sdbType = SDB_TRANS,
+                     .keyType = SDB_KEY_INT32,
+                     .encodeFp = (SdbEncodeFp)mndTransActionEncode,
+                     .decodeFp = (SdbDecodeFp)mndTransActionDecode,
+                     .insertFp = (SdbInsertFp)mndTransActionInsert,
+                     .updateFp = (SdbUpdateFp)mndTransActionUpdate,
+                     .deleteFp = (SdbDeleteFp)mndTransActionDelete};
+
+  return sdbSetTable(pMnode->pSdb, table);
+}
+
+void mndCleanupTrans(SMnode *pMnode) {}
+
+static SSdbRaw *mndTransActionEncode(STrans *pTrans) {
+  int32_t rawDataLen = 16 * sizeof(int32_t);
   int32_t redoLogNum = taosArrayGetSize(pTrans->redoLogs);
   int32_t undoLogNum = taosArrayGetSize(pTrans->undoLogs);
   int32_t commitLogNum = taosArrayGetSize(pTrans->commitLogs);
@@ -29,23 +49,23 @@ SSdbRaw *mndTransActionEncode(STrans *pTrans) {
   int32_t undoActionNum = taosArrayGetSize(pTrans->undoActions);
 
   for (int32_t i = 0; i < redoLogNum; ++i) {
-    SSdbRaw *pTmp = taosArrayGet(pTrans->redoLogs, i);
+    SSdbRaw *pTmp = taosArrayGetP(pTrans->redoLogs, i);
     rawDataLen += sdbGetRawTotalSize(pTmp);
   }
 
   for (int32_t i = 0; i < undoLogNum; ++i) {
-    SSdbRaw *pTmp = taosArrayGet(pTrans->undoLogs, i);
+    SSdbRaw *pTmp = taosArrayGetP(pTrans->undoLogs, i);
     rawDataLen += sdbGetRawTotalSize(pTmp);
   }
 
   for (int32_t i = 0; i < commitLogNum; ++i) {
-    SSdbRaw *pTmp = taosArrayGet(pTrans->commitLogs, i);
+    SSdbRaw *pTmp = taosArrayGetP(pTrans->commitLogs, i);
     rawDataLen += sdbGetRawTotalSize(pTmp);
   }
 
   SSdbRaw *pRaw = sdbAllocRaw(SDB_TRANS, SDB_TRANS_VER, rawDataLen);
   if (pRaw == NULL) {
-    mError("trn:%d, failed to alloc raw since %s", pTrans->id, terrstr());
+    mError("trans:%d, failed to alloc raw since %s", pTrans->id, terrstr());
     return NULL;
   }
 
@@ -60,31 +80,33 @@ SSdbRaw *mndTransActionEncode(STrans *pTrans) {
   SDB_SET_INT32(pRaw, dataPos, undoActionNum)
 
   for (int32_t i = 0; i < redoLogNum; ++i) {
-    SSdbRaw *pTmp = taosArrayGet(pTrans->redoLogs, i);
+    SSdbRaw *pTmp = taosArrayGetP(pTrans->redoLogs, i);
     int32_t  len = sdbGetRawTotalSize(pTmp);
     SDB_SET_INT32(pRaw, dataPos, len)
     SDB_SET_BINARY(pRaw, dataPos, (void *)pTmp, len)
   }
 
   for (int32_t i = 0; i < undoLogNum; ++i) {
-    SSdbRaw *pTmp = taosArrayGet(pTrans->undoLogs, i);
+    SSdbRaw *pTmp = taosArrayGetP(pTrans->undoLogs, i);
     int32_t  len = sdbGetRawTotalSize(pTmp);
     SDB_SET_INT32(pRaw, dataPos, len)
     SDB_SET_BINARY(pRaw, dataPos, (void *)pTmp, len)
   }
 
   for (int32_t i = 0; i < commitLogNum; ++i) {
-    SSdbRaw *pTmp = taosArrayGet(pTrans->commitLogs, i);
+    SSdbRaw *pTmp = taosArrayGetP(pTrans->commitLogs, i);
     int32_t  len = sdbGetRawTotalSize(pTmp);
     SDB_SET_INT32(pRaw, dataPos, len)
     SDB_SET_BINARY(pRaw, dataPos, (void *)pTmp, len)
   }
 
-  mDebug("trn:%d, is encoded as raw:%p, len:%d", pTrans->id, pRaw, dataPos);
+  mTrace("trans:%d, encode to raw:%p, len:%d", pTrans->id, pRaw, dataPos);
   return pRaw;
 }
 
-SSdbRow *mndTransActionDecode(SSdbRaw *pRaw) {
+static SSdbRow *mndTransActionDecode(SSdbRaw *pRaw) {
+  int32_t code = 0;
+
   int8_t sver = 0;
   if (sdbGetRawSoftVer(pRaw, &sver) != 0) {
     mError("failed to get soft ver from raw:%p since %s", pRaw, terrstr());
@@ -97,8 +119,8 @@ SSdbRow *mndTransActionDecode(SSdbRaw *pRaw) {
     return NULL;
   }
 
-  SSdbRow   *pRow = sdbAllocRow(sizeof(STrans));
-  STrans *pTrans = sdbGetRowObj(pRow);
+  SSdbRow *pRow = sdbAllocRow(sizeof(STrans));
+  STrans  *pTrans = sdbGetRowObj(pRow);
   if (pTrans == NULL) {
     mError("failed to alloc trans from raw:%p since %s", pRaw, terrstr());
     return NULL;
@@ -112,9 +134,9 @@ SSdbRow *mndTransActionDecode(SSdbRaw *pRaw) {
 
   if (pTrans->redoLogs == NULL || pTrans->undoLogs == NULL || pTrans->commitLogs == NULL ||
       pTrans->redoActions == NULL || pTrans->undoActions == NULL) {
-    terrno = TSDB_CODE_OUT_OF_MEMORY;
-    mDebug("trn:%d, failed to create array while parsed from raw:%p", pTrans->id, pRaw);
-    return NULL;
+    mDebug("trans:%d, failed to create array while parsed from raw:%p", pTrans->id, pRaw);
+    code = TSDB_CODE_OUT_OF_MEMORY;
+    goto TRANS_DECODE_OVER;
   }
 
   int32_t redoLogNum = 0;
@@ -133,85 +155,118 @@ SSdbRow *mndTransActionDecode(SSdbRaw *pRaw) {
   SDB_GET_INT32(pRaw, pRow, dataPos, &redoActionNum)
   SDB_GET_INT32(pRaw, pRow, dataPos, &undoActionNum)
 
-  int32_t code = 0;
   for (int32_t i = 0; i < redoLogNum; ++i) {
     int32_t dataLen = 0;
     SDB_GET_INT32(pRaw, pRow, dataPos, &dataLen)
 
     char *pData = malloc(dataLen);
     SDB_GET_BINARY(pRaw, pRow, dataPos, pData, dataLen);
-    void *ret = taosArrayPush(pTrans->redoLogs, pData);
+    void *ret = taosArrayPush(pTrans->redoLogs, &pData);
+    if (ret == NULL) {
+      code = TSDB_CODE_OUT_OF_MEMORY;
+      goto TRANS_DECODE_OVER;
+      break;
+    }
+  }
+
+  for (int32_t i = 0; i < undoLogNum; ++i) {
+    int32_t dataLen = 0;
+    SDB_GET_INT32(pRaw, pRow, dataPos, &dataLen)
+
+    char *pData = malloc(dataLen);
+    SDB_GET_BINARY(pRaw, pRow, dataPos, pData, dataLen);
+    void *ret = taosArrayPush(pTrans->undoLogs, &pData);
+    if (ret == NULL) {
+      code = TSDB_CODE_OUT_OF_MEMORY;
+      goto TRANS_DECODE_OVER;
+      break;
+    }
+  }
+
+  for (int32_t i = 0; i < commitLogNum; ++i) {
+    int32_t dataLen = 0;
+    SDB_GET_INT32(pRaw, pRow, dataPos, &dataLen)
+
+    char *pData = malloc(dataLen);
+    SDB_GET_BINARY(pRaw, pRow, dataPos, pData, dataLen);
+    void *ret = taosArrayPush(pTrans->commitLogs, &pData);
     if (ret == NULL) {
       code = TSDB_CODE_OUT_OF_MEMORY;
+      goto TRANS_DECODE_OVER;
       break;
     }
   }
 
+TRANS_DECODE_OVER:
   if (code != 0) {
-    terrno = code;
-    mError("trn:%d, failed to parse from raw:%p since %s", pTrans->id, pRaw, terrstr());
+    mError("trans:%d, failed to parse from raw:%p since %s", pTrans->id, pRaw, tstrerror(errno));
     mndTransDrop(pTrans);
+    terrno = code;
     return NULL;
   }
 
-  mDebug("trn:%d, is parsed from raw:%p", pTrans->id, pRaw);
+  mTrace("trans:%d, decode from raw:%p", pTrans->id, pRaw);
   return pRow;
 }
 
 static int32_t mndTransActionInsert(SSdb *pSdb, STrans *pTrans) {
+  mTrace("trans:%d, perform insert action, stage:%d", pTrans->id, pTrans->stage);
+
   SArray *pArray = pTrans->redoLogs;
   int32_t arraySize = taosArrayGetSize(pArray);
 
   for (int32_t i = 0; i < arraySize; ++i) {
-    SSdbRaw *pRaw = taosArrayGet(pArray, i);
+    SSdbRaw *pRaw = taosArrayGetP(pArray, i);
     int32_t  code = sdbWrite(pSdb, pRaw);
     if (code != 0) {
-      mError("trn:%d, failed to write raw:%p to sdb since %s", pTrans->id, pRaw, terrstr());
+      mError("trans:%d, failed to write raw:%p to sdb since %s", pTrans->id, pRaw, terrstr());
       return code;
     }
   }
-
-  mDebug("trn:%d, write to sdb", pTrans->id);
   return 0;
 }
 
 static int32_t mndTransActionDelete(SSdb *pSdb, STrans *pTrans) {
-  SArray *pArray = pTrans->redoLogs;
+  mTrace("trans:%d, perform delete action, stage:%d", pTrans->id, pTrans->stage);
+
+  SArray *pArray = pTrans->undoLogs;
   int32_t arraySize = taosArrayGetSize(pArray);
 
   for (int32_t i = 0; i < arraySize; ++i) {
-    SSdbRaw *pRaw = taosArrayGet(pArray, i);
+    SSdbRaw *pRaw = taosArrayGetP(pArray, i);
     int32_t  code = sdbWrite(pSdb, pRaw);
     if (code != 0) {
-      mError("trn:%d, failed to write raw:%p to sdb since %s", pTrans->id, pRaw, terrstr());
+      mError("trans:%d, failed to write raw:%p to sdb since %s", pTrans->id, pRaw, terrstr());
       return code;
     }
   }
 
-  mDebug("trn:%d, delete from sdb", pTrans->id);
   return 0;
 }
 
-static int32_t mndTransActionUpdate(SSdb *pSdb, STrans *pTrans, STrans *pDstTrans) {
-  assert(true);
-  SArray *pArray = pTrans->redoLogs;
+static int32_t mndTransActionUpdate(SSdb *pSdb, STrans *pOldTrans, STrans *pNewTrans) {
+  mTrace("trans:%d, perform update action, stage:%d", pOldTrans->id, pNewTrans->stage);
+
+  SArray *pArray = pOldTrans->commitLogs;
   int32_t arraySize = taosArrayGetSize(pArray);
 
   for (int32_t i = 0; i < arraySize; ++i) {
-    SSdbRaw *pRaw = taosArrayGet(pArray, i);
+    SSdbRaw *pRaw = taosArrayGetP(pArray, i);
     int32_t  code = sdbWrite(pSdb, pRaw);
     if (code != 0) {
-      mError("trn:%d, failed to write raw:%p to sdb since %s", pTrans->id, pRaw, terrstr());
+      mError("trans:%d, failed to write raw:%p to sdb since %s", pOldTrans->id, pRaw, terrstr());
       return code;
     }
   }
 
-  pTrans->stage = pDstTrans->stage;
-  mDebug("trn:%d, update in sdb", pTrans->id);
+  pOldTrans->stage = pNewTrans->stage;
   return 0;
 }
 
-static int32_t trnGenerateTransId() { return 1; }
+static int32_t trnGenerateTransId() {
+  static int32_t tmp = 0;
+  return ++tmp;
+}
 
 STrans *mndTransCreate(SMnode *pMnode, ETrnPolicy policy, void *rpcHandle) {
   STrans *pTrans = calloc(1, sizeof(STrans));
@@ -224,6 +279,7 @@ STrans *mndTransCreate(SMnode *pMnode, ETrnPolicy policy, void *rpcHandle) {
   pTrans->id = trnGenerateTransId();
   pTrans->stage = TRN_STAGE_PREPARE;
   pTrans->policy = policy;
+  pTrans->pMnode = pMnode;
   pTrans->rpcHandle = rpcHandle;
   pTrans->redoLogs = taosArrayInit(TRN_DEFAULT_ARRAY_SIZE, sizeof(void *));
   pTrans->undoLogs = taosArrayInit(TRN_DEFAULT_ARRAY_SIZE, sizeof(void *));
@@ -238,13 +294,13 @@ STrans *mndTransCreate(SMnode *pMnode, ETrnPolicy policy, void *rpcHandle) {
     return NULL;
   }
 
-  mDebug("trn:%d, is created, %p", pTrans->id, pTrans);
+  mDebug("trans:%d, data:%p is created", pTrans->id, pTrans);
   return pTrans;
 }
 
 static void trnDropArray(SArray *pArray) {
   for (int32_t i = 0; i < pArray->size; ++i) {
-    SSdbRaw *pRaw = taosArrayGet(pArray, i);
+    SSdbRaw *pRaw = taosArrayGetP(pArray, i);
     tfree(pRaw);
   }
 
@@ -258,13 +314,13 @@ void mndTransDrop(STrans *pTrans) {
   trnDropArray(pTrans->redoActions);
   trnDropArray(pTrans->undoActions);
 
-  mDebug("trn:%d, is dropped, %p", pTrans->id, pTrans);
+  mDebug("trans:%d, data:%p is dropped", pTrans->id, pTrans);
   tfree(pTrans);
 }
 
 void mndTransSetRpcHandle(STrans *pTrans, void *rpcHandle) {
   pTrans->rpcHandle = rpcHandle;
-  mTrace("trn:%d, set rpc handle:%p", pTrans->id, rpcHandle);
+  mTrace("trans:%d, set rpc handle:%p", pTrans->id, rpcHandle);
 }
 
 static int32_t mndTransAppendArray(SArray *pArray, SSdbRaw *pRaw) {
@@ -273,7 +329,7 @@ static int32_t mndTransAppendArray(SArray *pArray, SSdbRaw *pRaw) {
     return -1;
   }
 
-  void *ptr = taosArrayPush(pArray, pRaw);
+  void *ptr = taosArrayPush(pArray, &pRaw);
   if (ptr == NULL) {
     terrno = TSDB_CODE_OUT_OF_MEMORY;
     return -1;
@@ -284,92 +340,92 @@ static int32_t mndTransAppendArray(SArray *pArray, SSdbRaw *pRaw) {
 
 int32_t mndTransAppendRedolog(STrans *pTrans, SSdbRaw *pRaw) {
   int32_t code = mndTransAppendArray(pTrans->redoLogs, pRaw);
-  mTrace("trn:%d, raw:%p append to redo logs, code:%d", pTrans->id, pRaw, code);
+  mTrace("trans:%d, raw:%p append to redo logs, code:%d", pTrans->id, pRaw, code);
   return code;
 }
 
 int32_t mndTransAppendUndolog(STrans *pTrans, SSdbRaw *pRaw) {
   int32_t code = mndTransAppendArray(pTrans->undoLogs, pRaw);
-  mTrace("trn:%d, raw:%p append to undo logs, code:%d", pTrans->id, pRaw, code);
+  mTrace("trans:%d, raw:%p append to undo logs, code:%d", pTrans->id, pRaw, code);
   return code;
 }
 
 int32_t mndTransAppendCommitlog(STrans *pTrans, SSdbRaw *pRaw) {
   int32_t code = mndTransAppendArray(pTrans->commitLogs, pRaw);
-  mTrace("trn:%d, raw:%p append to commit logs, code:%d", pTrans->id, pRaw, code);
+  mTrace("trans:%d, raw:%p append to commit logs, code:%d", pTrans->id, pRaw, code);
   return code;
 }
 
 int32_t mndTransAppendRedoAction(STrans *pTrans, SEpSet *pEpSet, void *pMsg) {
   int32_t code = mndTransAppendArray(pTrans->redoActions, pMsg);
-  mTrace("trn:%d, msg:%p append to redo actions", pTrans->id, pMsg);
+  mTrace("trans:%d, msg:%p append to redo actions", pTrans->id, pMsg);
   return code;
 }
 
 int32_t mndTransAppendUndoAction(STrans *pTrans, SEpSet *pEpSet, void *pMsg) {
   int32_t code = mndTransAppendArray(pTrans->undoActions, pMsg);
-  mTrace("trn:%d, msg:%p append to undo actions", pTrans->id, pMsg);
+  mTrace("trans:%d, msg:%p append to undo actions", pTrans->id, pMsg);
   return code;
 }
 
-int32_t mndInitTrans(SMnode *pMnode) {
-  SSdbTable table = {.sdbType = SDB_TRANS,
-                     .keyType = SDB_KEY_INT32,
-                     .encodeFp = (SdbEncodeFp)mndTransActionEncode,
-                     .decodeFp = (SdbDecodeFp)mndTransActionDecode,
-                     .insertFp = (SdbInsertFp)mndTransActionInsert,
-                     .updateFp = (SdbUpdateFp)mndTransActionUpdate,
-                     .deleteFp = (SdbDeleteFp)mndTransActionDelete};
-
-  return sdbSetTable(pMnode->pSdb, table);
-}
-
-void mndCleanupTrans(SMnode *pMnode) {}
-
-int32_t mndTransPrepare(STrans *pTrans, int32_t (*syncfp)(SSdbRaw *pRaw, void *pData)) {
-  if (syncfp == NULL) return -1;
+int32_t mndTransPrepare(STrans *pTrans) {
+  mDebug("trans:%d, prepare transaction", pTrans->id);
 
   SSdbRaw *pRaw = mndTransActionEncode(pTrans);
   if (pRaw == NULL) {
-    mError("trn:%d, failed to decode trans since %s", pTrans->id, terrstr());
+    mError("trans:%d, failed to decode trans since %s", pTrans->id, terrstr());
     return -1;
   }
   sdbSetRawStatus(pRaw, SDB_STATUS_CREATING);
 
-  if (sdbWrite(pTrans->pMnode->pSdb, pRaw) != 0) {
-    mError("trn:%d, failed to write trans since %s", pTrans->id, terrstr());
+  if (sdbWriteNotFree(pTrans->pMnode->pSdb, pRaw) != 0) {
+    mError("trans:%d, failed to write trans since %s", pTrans->id, terrstr());
     return -1;
   }
 
-  if ((*syncfp)(pRaw, pTrans->rpcHandle) != 0) {
-    mError("trn:%d, failed to sync trans since %s", pTrans->id, terrstr());
+  STransMsg *pMsg = calloc(1, sizeof(STransMsg));
+  pMsg->id = pTrans->id;
+  pMsg->rpcHandle = pTrans->rpcHandle;
+
+  mDebug("trans:%d, start sync, RPC:%p pMsg:%p", pTrans->id, pTrans->rpcHandle, pMsg);
+  if (mndSyncPropose(pTrans->pMnode, pRaw, pMsg) != 0) {
+    mError("trans:%d, failed to sync since %s", pTrans->id, terrstr());
+    free(pMsg);
+    sdbFreeRaw(pRaw);
     return -1;
   }
 
+  sdbFreeRaw(pRaw);
   return 0;
 }
 
-static void trnSendRpcRsp(void *rpcHandle, int32_t code) {
-  if (rpcHandle != NULL) {
-    SRpcMsg rspMsg = {.handle = rpcHandle, .code = terrno};
+static void trnSendRpcRsp(STransMsg *pMsg, int32_t code) {
+  mDebug("trans:%d, send rpc rsp, RPC:%p code:0x%x pMsg:%p", pMsg->id, pMsg->rpcHandle, code & 0xFFFF, pMsg);
+  if (pMsg->rpcHandle != NULL) {
+    SRpcMsg rspMsg = {.handle = pMsg->rpcHandle, .code = code};
     rpcSendResponse(&rspMsg);
   }
-}
 
-int32_t mndTransApply(SMnode *pMnode, SSdbRaw *pRaw, void *pData, int32_t code) {
-  if (code != 0) {
-    trnSendRpcRsp(pData, terrno);
-    return 0;
-  }
+  free(pMsg);
+}
 
-  if (sdbWrite(pMnode->pSdb, pData) != 0) {
-    code = terrno;
-    trnSendRpcRsp(pData, code);
-    terrno = code;
-    return -1;
+void mndTransApply(SMnode *pMnode, SSdbRaw *pRaw, STransMsg *pMsg, int32_t code) {
+  if (code == 0) {
+    mDebug("trans:%d, commit transaction", pMsg->id);
+    sdbSetRawStatus(pRaw, SDB_STATUS_READY);
+    if (sdbWrite(pMnode->pSdb, pRaw) != 0) {
+      code = terrno;
+      mError("trans:%d, failed to write sdb while commit since %s", pMsg->id, terrstr());
+    }
+    trnSendRpcRsp(pMsg, code);
+  } else {
+    mDebug("trans:%d, rollback transaction", pMsg->id);
+    sdbSetRawStatus(pRaw, SDB_STATUS_DROPPED);
+    if (sdbWrite(pMnode->pSdb, pRaw) != 0) {
+      mError("trans:%d, failed to write sdb while rollback since %s", pMsg->id, terrstr());
+    }
+    trnSendRpcRsp(pMsg, code);
   }
-
-  return 0;
 }
 
 static int32_t trnExecuteArray(SMnode *pMnode, SArray *pArray) {

source/dnode/mnode/impl/src/mndUser.c

@@ -27,11 +27,14 @@ static SSdbRaw *mndUserActionEncode(SUserObj *pUser);
 static SSdbRow *mndUserActionDecode(SSdbRaw *pRaw);
 static int32_t  mndUserActionInsert(SSdb *pSdb, SUserObj *pUser);
 static int32_t  mndUserActionDelete(SSdb *pSdb, SUserObj *pUser);
-static int32_t  mndUserActionUpdate(SSdb *pSdb, SUserObj *pSrcUser, SUserObj *pDstUser);
+static int32_t  mndUserActionUpdate(SSdb *pSdb, SUserObj *pOldUser, SUserObj *pNewUser);
 static int32_t  mndCreateUser(SMnode *pMnode, char *acct, char *user, char *pass, SMnodeMsg *pMsg);
 static int32_t  mndProcessCreateUserMsg(SMnodeMsg *pMsg);
 static int32_t  mndProcessAlterUserMsg(SMnodeMsg *pMsg);
 static int32_t  mndProcessDropUserMsg(SMnodeMsg *pMsg);
+static int32_t  mndGetUserMeta(SMnodeMsg *pMsg, SShowObj *pShow, STableMetaMsg *pMeta);
+static int32_t  mndRetrieveUsers(SMnodeMsg *pMsg, SShowObj *pShow, char *data, int32_t rows);
+static void     mndCancelGetNextUser(SMnode *pMnode, void *pIter);
 
 int32_t mndInitUser(SMnode *pMnode) {
   SSdbTable table = {.sdbType = SDB_USER,
@@ -47,6 +50,9 @@ int32_t mndInitUser(SMnode *pMnode) {
   mndSetMsgHandle(pMnode, TSDB_MSG_TYPE_ALTER_USER, mndProcessAlterUserMsg);
   mndSetMsgHandle(pMnode, TSDB_MSG_TYPE_DROP_USER, mndProcessDropUserMsg);
 
+  mndAddShowMetaHandle(pMnode, TSDB_MGMT_TABLE_USER, mndGetUserMeta);
+  mndAddShowRetrieveHandle(pMnode, TSDB_MGMT_TABLE_USER, mndRetrieveUsers);
+  mndAddShowFreeIterHandle(pMnode, TSDB_MGMT_TABLE_USER, mndCancelGetNextUser);
   return sdbSetTable(pMnode->pSdb, table);
 }
 
@@ -70,7 +76,7 @@ static int32_t mndCreateDefaultUser(SMnode *pMnode, char *acct, char *user, char
   if (pRaw == NULL) return -1;
   sdbSetRawStatus(pRaw, SDB_STATUS_READY);
 
-  mTrace("user:%s, will be created while deploy sdb", userObj.user);
+  mDebug("user:%s, will be created while deploy sdb", userObj.user);
   return sdbWrite(pMnode->pSdb, pRaw);
 }
 
@@ -162,16 +168,16 @@ static int32_t mndUserActionDelete(SSdb *pSdb, SUserObj *pUser) {
   return 0;
 }
 
-static int32_t mndUserActionUpdate(SSdb *pSdb, SUserObj *pSrcUser, SUserObj *pDstUser) {
-  mTrace("user:%s, perform update action", pSrcUser->user);
-  memcpy(pSrcUser->user, pDstUser->user, TSDB_USER_LEN);
-  memcpy(pSrcUser->pass, pDstUser->pass, TSDB_KEY_LEN);
-  memcpy(pSrcUser->acct, pDstUser->acct, TSDB_USER_LEN);
-  pSrcUser->createdTime = pDstUser->createdTime;
-  pSrcUser->updateTime = pDstUser->updateTime;
-  pSrcUser->superAuth = pDstUser->superAuth;
-  pSrcUser->readAuth = pDstUser->readAuth;
-  pSrcUser->writeAuth = pDstUser->writeAuth;
+static int32_t mndUserActionUpdate(SSdb *pSdb, SUserObj *pOldUser, SUserObj *pNewUser) {
+  mTrace("user:%s, perform update action", pOldUser->user);
+  memcpy(pOldUser->user, pNewUser->user, TSDB_USER_LEN);
+  memcpy(pOldUser->pass, pNewUser->pass, TSDB_KEY_LEN);
+  memcpy(pOldUser->acct, pNewUser->acct, TSDB_USER_LEN);
+  pOldUser->createdTime = pNewUser->createdTime;
+  pOldUser->updateTime = pNewUser->updateTime;
+  pOldUser->superAuth = pNewUser->superAuth;
+  pOldUser->readAuth = pNewUser->readAuth;
+  pOldUser->writeAuth = pNewUser->writeAuth;
   return 0;
 }
 
@@ -197,11 +203,15 @@ static int32_t mndCreateUser(SMnode *pMnode, char *acct, char *user, char *pass,
   userObj.writeAuth = 1;
 
   STrans *pTrans = mndTransCreate(pMnode, TRN_POLICY_ROLLBACK, pMsg->rpcMsg.handle);
-  if (pTrans == NULL) return -1;
+  if (pTrans == NULL) {
+    mError("user:%s, failed to create since %s", user, terrstr());
+    return -1;
+  }
+  mDebug("trans:%d, used to create user:%s", pTrans->id, user);
 
   SSdbRaw *pRedoRaw = mndUserActionEncode(&userObj);
   if (pRedoRaw == NULL || mndTransAppendRedolog(pTrans, pRedoRaw) != 0) {
-    mError("failed to append redo log since %s", terrstr());
+    mError("trans:%d, failed to append redo log since %s", pTrans->id, terrstr());
     mndTransDrop(pTrans);
     return -1;
   }
@@ -209,7 +219,7 @@ static int32_t mndCreateUser(SMnode *pMnode, char *acct, char *user, char *pass,
 
   SSdbRaw *pUndoRaw = mndUserActionEncode(&userObj);
   if (pUndoRaw == NULL || mndTransAppendUndolog(pTrans, pUndoRaw) != 0) {
-    mError("failed to append undo log since %s", terrstr());
+    mError("trans:%d, failed to append undo log since %s", pTrans->id, terrstr());
     mndTransDrop(pTrans);
     return -1;
   }
@@ -217,13 +227,90 @@ static int32_t mndCreateUser(SMnode *pMnode, char *acct, char *user, char *pass,
 
   SSdbRaw *pCommitRaw = mndUserActionEncode(&userObj);
   if (pCommitRaw == NULL || mndTransAppendCommitlog(pTrans, pCommitRaw) != 0) {
-    mError("failed to append commit log since %s", terrstr());
+    mError("trans:%d, failed to append commit log since %s", pTrans->id, terrstr());
     mndTransDrop(pTrans);
     return -1;
   }
   sdbSetRawStatus(pCommitRaw, SDB_STATUS_READY);
 
-  if (mndTransPrepare(pTrans, mndSyncPropose) != 0) {
+  if (mndTransPrepare(pTrans) != 0) {
+    mError("trans:%d, failed to prepare since %s", pTrans->id, terrstr());
+    mndTransDrop(pTrans);
+    return -1;
+  }
+
+  mndTransDrop(pTrans);
+  return 0;
+}
+
+static int32_t mndUpdateUser(SMnode *pMnode, SUserObj *pOldUser, SUserObj *pNewUser, SMnodeMsg *pMsg) {
+  STrans *pTrans = mndTransCreate(pMnode, TRN_POLICY_ROLLBACK, pMsg->rpcMsg.handle);
+  if (pTrans == NULL) {
+    mError("user:%s, failed to update since %s", pOldUser->user, terrstr());
+    return -1;
+  }
+  mDebug("trans:%d, used to update user:%s", pTrans->id, pOldUser->user);
+
+  SSdbRaw *pRedoRaw = mndUserActionEncode(pNewUser);
+  if (pRedoRaw == NULL || mndTransAppendRedolog(pTrans, pRedoRaw) != 0) {
+    mError("trans:%d, failed to append redo log since %s", pTrans->id, terrstr());
+    mndTransDrop(pTrans);
+    return -1;
+  }
+  sdbSetRawStatus(pRedoRaw, SDB_STATUS_READY);
+
+  SSdbRaw *pUndoRaw = mndUserActionEncode(pOldUser);
+  if (pUndoRaw == NULL || mndTransAppendUndolog(pTrans, pUndoRaw) != 0) {
+    mError("trans:%d, failed to append undo log since %s", pTrans->id, terrstr());
+    mndTransDrop(pTrans);
+    return -1;
+  }
+  sdbSetRawStatus(pUndoRaw, SDB_STATUS_READY);
+
+  if (mndTransPrepare(pTrans) != 0) {
+    mError("trans:%d, failed to prepare since %s", pTrans->id, terrstr());
+    mndTransDrop(pTrans);
+    return -1;
+  }
+
+  mndTransDrop(pTrans);
+  return 0;
+}
+
+static int32_t mndDropUser(SMnode *pMnode, SMnodeMsg *pMsg, SUserObj *pUser) {
+  STrans *pTrans = mndTransCreate(pMnode, TRN_POLICY_ROLLBACK, pMsg->rpcMsg.handle);
+  if (pTrans == NULL) {
+    mError("user:%s, failed to drop since %s", pUser->user, terrstr());
+    return -1;
+  }
+  mDebug("trans:%d, used to drop user:%s", pTrans->id, pUser->user);
+
+  SSdbRaw *pRedoRaw = mndUserActionEncode(pUser);
+  if (pRedoRaw == NULL || mndTransAppendRedolog(pTrans, pRedoRaw) != 0) {
+    mError("trans:%d, failed to append redo log since %s", pTrans->id, terrstr());
+    mndTransDrop(pTrans);
+    return -1;
+  }
+  sdbSetRawStatus(pRedoRaw, SDB_STATUS_DROPPING);
+
+  SSdbRaw *pUndoRaw = mndUserActionEncode(pUser);
+  if (pUndoRaw == NULL || mndTransAppendUndolog(pTrans, pUndoRaw) != 0) {
+    mError("trans:%d, failed to append undo log since %s", pTrans->id, terrstr());
+    mndTransDrop(pTrans);
+    return -1;
+  }
+  sdbSetRawStatus(pUndoRaw, SDB_STATUS_READY);
+
+  SSdbRaw *pCommitRaw = mndUserActionEncode(pUser);
+  if (pCommitRaw == NULL || mndTransAppendCommitlog(pTrans, pCommitRaw) != 0) {
+    mError("trans:%d, failed to append commit log since %s", pTrans->id, terrstr());
+    mndTransDrop(pTrans);
+    return -1;
+  }
+  sdbSetRawStatus(pCommitRaw, SDB_STATUS_DROPPED);
+
+  if (mndTransPrepare(pTrans) != 0) {
+    mError("trans:%d, failed to prepare since %s", pTrans->id, terrstr());
     mndTransDrop(pTrans);
     return -1;
   }
@@ -236,6 +323,8 @@ static int32_t mndProcessCreateUserMsg(SMnodeMsg *pMsg) {
   SMnode         *pMnode = pMsg->pMnode;
   SCreateUserMsg *pCreate = pMsg->rpcMsg.pCont;
 
+  mDebug("user:%s, start to create", pCreate->user);
+
   if (pCreate->user[0] == 0) {
     terrno = TSDB_CODE_MND_INVALID_USER_FORMAT;
     mError("user:%s, failed to create since %s", pCreate->user, terrstr());
@@ -275,13 +364,185 @@ static int32_t mndProcessCreateUserMsg(SMnodeMsg *pMsg) {
 }
 
 static int32_t mndProcessAlterUserMsg(SMnodeMsg *pMsg) {
-  terrno = TSDB_CODE_MND_MSG_NOT_PROCESSED;
-  mError("failed to process alter user msg since %s", terrstr());
-  return -1;
+  SMnode        *pMnode = pMsg->pMnode;
+  SAlterUserMsg *pAlter = pMsg->rpcMsg.pCont;
+
+  mDebug("user:%s, start to alter", pAlter->user);
+
+  if (pAlter->user[0] == 0) {
+    terrno = TSDB_CODE_MND_INVALID_USER_FORMAT;
+    mError("user:%s, failed to alter since %s", pAlter->user, terrstr());
+    return -1;
+  }
+
+  if (pAlter->pass[0] == 0) {
+    terrno = TSDB_CODE_MND_INVALID_PASS_FORMAT;
+    mError("user:%s, failed to alter since %s", pAlter->user, terrstr());
+    return -1;
+  }
+
+  SUserObj *pUser = sdbAcquire(pMnode->pSdb, SDB_USER, pAlter->user);
+  if (pUser == NULL) {
+    terrno = TSDB_CODE_MND_USER_NOT_EXIST;
+    mError("user:%s, failed to alter since %s", pAlter->user, terrstr());
+    return -1;
+  }
+
+  SUserObj *pOperUser = sdbAcquire(pMnode->pSdb, SDB_USER, pMsg->user);
+  if (pOperUser == NULL) {
+    terrno = TSDB_CODE_MND_NO_USER_FROM_CONN;
+    mError("user:%s, failed to alter since %s", pAlter->user, terrstr());
+    return -1;
+  }
+
+  SUserObj newUser = {0};
+  memcpy(&newUser, pUser, sizeof(SUserObj));
+  memset(pUser->pass, 0, sizeof(pUser->pass));
+  taosEncryptPass((uint8_t *)pAlter->pass, strlen(pAlter->pass), pUser->pass);
+
+  int32_t code = mndUpdateUser(pMnode, pUser, &newUser, pMsg);
+  sdbRelease(pMnode->pSdb, pOperUser);
+
+  if (code != 0) {
+    mError("user:%s, failed to alter since %s", pAlter->user, terrstr());
+    return -1;
+  }
+
+  return TSDB_CODE_MND_ACTION_IN_PROGRESS;
 }
 
 static int32_t mndProcessDropUserMsg(SMnodeMsg *pMsg) {
-  terrno = TSDB_CODE_MND_MSG_NOT_PROCESSED;
-  mError("failed to process drop user msg since %s", terrstr());
-  return -1;
+  SMnode       *pMnode = pMsg->pMnode;
+  SDropUserMsg *pDrop = pMsg->rpcMsg.pCont;
+
+  mDebug("user:%s, start to drop", pDrop->user);
+
+  if (pDrop->user[0] == 0) {
+    terrno = TSDB_CODE_MND_INVALID_USER_FORMAT;
+    mError("user:%s, failed to drop since %s", pDrop->user, terrstr());
+    return -1;
+  }
+
+  SUserObj *pUser = sdbAcquire(pMnode->pSdb, SDB_USER, pDrop->user);
+  if (pUser == NULL) {
+    terrno = TSDB_CODE_MND_USER_NOT_EXIST;
+    mError("user:%s, failed to drop since %s", pDrop->user, terrstr());
+    return -1;
+  }
+
+  SUserObj *pOperUser = sdbAcquire(pMnode->pSdb, SDB_USER, pMsg->user);
+  if (pOperUser == NULL) {
+    terrno = TSDB_CODE_MND_NO_USER_FROM_CONN;
+    mError("user:%s, failed to drop since %s", pDrop->user, terrstr());
+    return -1;
+  }
+
+  int32_t code = mndDropUser(pMnode, pMsg, pUser);
+  sdbRelease(pMnode->pSdb, pOperUser);
+
+  if (code != 0) {
+    mError("user:%s, failed to drop since %s", pDrop->user, terrstr());
+    return -1;
+  }
+
+  return TSDB_CODE_MND_ACTION_IN_PROGRESS;
+}
+
+static int32_t mndGetUserMeta(SMnodeMsg *pMsg, SShowObj *pShow, STableMetaMsg *pMeta) {
+  SMnode *pMnode = pMsg->pMnode;
+  SSdb   *pSdb = pMnode->pSdb;
+
+  int32_t  cols = 0;
+  SSchema *pSchema = pMeta->pSchema;
+
+  pShow->bytes[cols] = TSDB_USER_LEN + VARSTR_HEADER_SIZE;
+  pSchema[cols].type = TSDB_DATA_TYPE_BINARY;
+  strcpy(pSchema[cols].name, "name");
+  pSchema[cols].bytes = htons(pShow->bytes[cols]);
+  cols++;
+
+  pShow->bytes[cols] = 10 + VARSTR_HEADER_SIZE;
+  pSchema[cols].type = TSDB_DATA_TYPE_BINARY;
+  strcpy(pSchema[cols].name, "privilege");
+  pSchema[cols].bytes = htons(pShow->bytes[cols]);
+  cols++;
+
+  pShow->bytes[cols] = 8;
+  pSchema[cols].type = TSDB_DATA_TYPE_TIMESTAMP;
+  strcpy(pSchema[cols].name, "create_time");
+  pSchema[cols].bytes = htons(pShow->bytes[cols]);
+  cols++;
+
+  pShow->bytes[cols] = TSDB_USER_LEN + VARSTR_HEADER_SIZE;
+  pSchema[cols].type = TSDB_DATA_TYPE_BINARY;
+  strcpy(pSchema[cols].name, "account");
+  pSchema[cols].bytes = htons(pShow->bytes[cols]);
+  cols++;
+
+  pMeta->numOfColumns = htons(cols);
+  pShow->numOfColumns = cols;
+
+  pShow->offset[0] = 0;
+  for (int32_t i = 1; i < cols; ++i) {
+    pShow->offset[i] = pShow->offset[i - 1] + pShow->bytes[i - 1];
+  }
+
+  pShow->numOfRows = sdbGetSize(pSdb, SDB_USER);
+  pShow->rowSize = pShow->offset[cols - 1] + pShow->bytes[cols - 1];
+  strcpy(pMeta->tableFname, mndShowStr(pShow->type));
+
+  return 0;
+}
+
+static int32_t mndRetrieveUsers(SMnodeMsg *pMsg, SShowObj *pShow, char *data, int32_t rows) {
+  SMnode   *pMnode = pMsg->pMnode;
+  SSdb     *pSdb = pMnode->pSdb;
+  int32_t   numOfRows = 0;
+  SUserObj *pUser = NULL;
+  int32_t   cols = 0;
+  char     *pWrite;
+
+  while (numOfRows < rows) {
+    pShow->pIter = sdbFetch(pSdb, SDB_USER, pShow->pIter, (void **)&pUser);
+    if (pShow->pIter == NULL) break;
+
+    cols = 0;
+
+    pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
+    STR_WITH_MAXSIZE_TO_VARSTR(pWrite, pUser->user, pShow->bytes[cols]);
+    cols++;
+
+    pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
+    if (pUser->superAuth) {
+      const char *src = "super";
+      STR_WITH_SIZE_TO_VARSTR(pWrite, src, strlen(src));
+    } else if (pUser->writeAuth) {
+      const char *src = "writable";
+      STR_WITH_SIZE_TO_VARSTR(pWrite, src, strlen(src));
+    } else {
+      const char *src = "readable";
+      STR_WITH_SIZE_TO_VARSTR(pWrite, src, strlen(src));
+    }
+    cols++;
+
+    pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
+    *(int64_t *)pWrite = pUser->createdTime;
+    cols++;
+
+    pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
+    STR_WITH_MAXSIZE_TO_VARSTR(pWrite, pUser->acct, pShow->bytes[cols]);
+    cols++;
+
+    numOfRows++;
+    sdbRelease(pSdb, pUser);
+  }
+
+  mnodeVacuumResult(data, pShow->numOfColumns, numOfRows, rows, pShow);
+  pShow->numOfReads += numOfRows;
+  return numOfRows;
+}
+
+static void mndCancelGetNextUser(SMnode *pMnode, void *pIter) {
+  SSdb *pSdb = pMnode->pSdb;
+  sdbCancelFetch(pSdb, pIter);
 }
\ No newline at end of file

source/dnode/mnode/impl/src/mndVgroup.c

@@ -14,8 +14,372 @@
  */
 
 #define _DEFAULT_SOURCE
-#include "os.h"
-#include "mndInt.h"
+#include "mndVgroup.h"
+#include "mndDb.h"
+#include "mndDnode.h"
+#include "mndMnode.h"
+#include "mndShow.h"
+#include "mndTrans.h"
 
-int32_t mndInitVgroup(SMnode *pMnode) { return 0; }
-void    mndCleanupVgroup(SMnode *pMnode) {}
+#define TSDB_VGROUP_VER_NUM 1
+#define TSDB_VGROUP_RESERVE_SIZE 64
\ No newline at end of file
+
+static SSdbRaw *mndVgroupActionEncode(SVgObj *pVgroup);
+static SSdbRow *mndVgroupActionDecode(SSdbRaw *pRaw);
+static int32_t  mndVgroupActionInsert(SSdb *pSdb, SVgObj *pVgroup);
+static int32_t  mndVgroupActionDelete(SSdb *pSdb, SVgObj *pVgroup);
+static int32_t  mndVgroupActionUpdate(SSdb *pSdb, SVgObj *pOldVgroup, SVgObj *pNewVgroup);
+
+static int32_t mndProcessCreateVnodeRsp(SMnodeMsg *pMsg);
+static int32_t mndProcessAlterVnodeRsp(SMnodeMsg *pMsg);
+static int32_t mndProcessDropVnodeRsp(SMnodeMsg *pMsg);
+static int32_t mndProcessSyncVnodeRsp(SMnodeMsg *pMsg);
+static int32_t mndProcessCompactVnodeRsp(SMnodeMsg *pMsg);
+
+static int32_t mndGetVgroupMeta(SMnodeMsg *pMsg, SShowObj *pShow, STableMetaMsg *pMeta);
+static int32_t mndRetrieveVgroups(SMnodeMsg *pMsg, SShowObj *pShow, char *data, int32_t rows);
+static void    mndCancelGetNextVgroup(SMnode *pMnode, void *pIter);
+static int32_t mndGetVnodeMeta(SMnodeMsg *pMsg, SShowObj *pShow, STableMetaMsg *pMeta);
+static int32_t mndRetrieveVnodes(SMnodeMsg *pMsg, SShowObj *pShow, char *data, int32_t rows);
+static void    mndCancelGetNextVnode(SMnode *pMnode, void *pIter);
+
+int32_t mndInitVgroup(SMnode *pMnode) {
+  SSdbTable table = {.sdbType = SDB_VGROUP,
+                     .keyType = SDB_KEY_BINARY,
+                     .encodeFp = (SdbEncodeFp)mndVgroupActionEncode,
+                     .decodeFp = (SdbDecodeFp)mndVgroupActionDecode,
+                     .insertFp = (SdbInsertFp)mndVgroupActionInsert,
+                     .updateFp = (SdbUpdateFp)mndVgroupActionDelete,
+                     .deleteFp = (SdbDeleteFp)mndVgroupActionUpdate};
+
+  mndSetMsgHandle(pMnode, TSDB_MSG_TYPE_CREATE_VNODE_IN_RSP, mndProcessCreateVnodeRsp);
+  mndSetMsgHandle(pMnode, TSDB_MSG_TYPE_ALTER_VNODE_IN_RSP, mndProcessAlterVnodeRsp);
+  mndSetMsgHandle(pMnode, TSDB_MSG_TYPE_DROP_VNODE_IN_RSP, mndProcessDropVnodeRsp);
+  mndSetMsgHandle(pMnode, TSDB_MSG_TYPE_SYNC_VNODE_IN_RSP, mndProcessSyncVnodeRsp);
+  mndSetMsgHandle(pMnode, TSDB_MSG_TYPE_COMPACT_VNODE_IN_RSP, mndProcessCompactVnodeRsp);
+
+  mndAddShowMetaHandle(pMnode, TSDB_MGMT_TABLE_VGROUP, mndGetVgroupMeta);
+  mndAddShowRetrieveHandle(pMnode, TSDB_MGMT_TABLE_VGROUP, mndRetrieveVgroups);
+  mndAddShowFreeIterHandle(pMnode, TSDB_MGMT_TABLE_VGROUP, mndCancelGetNextVgroup);
+  mndAddShowMetaHandle(pMnode, TSDB_MGMT_TABLE_VNODES, mndGetVnodeMeta);
+  mndAddShowRetrieveHandle(pMnode, TSDB_MGMT_TABLE_VNODES, mndRetrieveVnodes);
+  mndAddShowFreeIterHandle(pMnode, TSDB_MGMT_TABLE_VNODES, mndCancelGetNextVnode);
+
+  return sdbSetTable(pMnode->pSdb, table);
+}
+
+void mndCleanupVgroup(SMnode *pMnode) {}
+
+static SSdbRaw *mndVgroupActionEncode(SVgObj *pVgroup) {
+  SSdbRaw *pRaw = sdbAllocRaw(SDB_DB, TSDB_VGROUP_VER_NUM, sizeof(SDbObj));
+  if (pRaw == NULL) return NULL;
+
+  int32_t dataPos = 0;
+  SDB_SET_INT32(pRaw, dataPos, pVgroup->vgId)
+  SDB_SET_INT64(pRaw, dataPos, pVgroup->createdTime)
+  SDB_SET_INT64(pRaw, dataPos, pVgroup->updateTime)
+  SDB_SET_INT32(pRaw, dataPos, pVgroup->version)
+  SDB_SET_BINARY(pRaw, dataPos, pVgroup->dbName, TSDB_FULL_DB_NAME_LEN)
+  SDB_SET_INT8(pRaw, dataPos, pVgroup->replica)
+  for (int8_t i = 0; i < pVgroup->replica; ++i) {
+    SVnodeGid *pVgid = &pVgroup->vnodeGid[i];
+    SDB_SET_INT32(pRaw, dataPos, pVgid->dnodeId)
+    SDB_SET_INT8(pRaw, dataPos, pVgid->role)
+  }
+  SDB_SET_RESERVE(pRaw, dataPos, TSDB_VGROUP_RESERVE_SIZE)
+  SDB_SET_DATALEN(pRaw, dataPos);
+
+  return pRaw;
+}
+
+static SSdbRow *mndVgroupActionDecode(SSdbRaw *pRaw) {
+  int8_t sver = 0;
+  if (sdbGetRawSoftVer(pRaw, &sver) != 0) return NULL;
+
+  if (sver != TSDB_VGROUP_VER_NUM) {
+    mError("failed to decode vgroup since %s", terrstr());
+    terrno = TSDB_CODE_SDB_INVALID_DATA_VER;
+    return NULL;
+  }
+
+  SSdbRow *pRow = sdbAllocRow(sizeof(SDbObj));
+  SVgObj  *pVgroup = sdbGetRowObj(pRow);
+  if (pVgroup == NULL) return NULL;
+
+  int32_t dataPos = 0;
+  SDB_GET_INT32(pRaw, pRow, dataPos, &pVgroup->vgId)
+  SDB_GET_INT64(pRaw, pRow, dataPos, &pVgroup->createdTime)
+  SDB_GET_INT64(pRaw, pRow, dataPos, &pVgroup->updateTime)
+  SDB_GET_INT32(pRaw, pRow, dataPos, &pVgroup->version)
+  SDB_GET_BINARY(pRaw, pRow, dataPos, pVgroup->dbName, TSDB_FULL_DB_NAME_LEN)
+  SDB_GET_INT8(pRaw, pRow, dataPos, &pVgroup->replica)
+  for (int8_t i = 0; i < pVgroup->replica; ++i) {
+    SVnodeGid *pVgid = &pVgroup->vnodeGid[i];
+    SDB_GET_INT32(pRaw, pRow, dataPos, &pVgid->dnodeId)
+    SDB_GET_INT8(pRaw, pRow, dataPos, (int8_t *)&pVgid->role)
+  }
+  SDB_GET_RESERVE(pRaw, pRow, dataPos, TSDB_VGROUP_RESERVE_SIZE)
+
+  return pRow;
+}
+
+static int32_t mndVgroupActionInsert(SSdb *pSdb, SVgObj *pVgroup) {
+  mTrace("vgId:%d, perform insert action", pVgroup->vgId);
+  return 0;
+}
+
+static int32_t mndVgroupActionDelete(SSdb *pSdb, SVgObj *pVgroup) {
+  mTrace("vgId:%d, perform delete action", pVgroup->vgId);
+  return 0;
+}
+
+static int32_t mndProcessCreateVnodeRsp(SMnodeMsg *pMsg) { return 0; }
+static int32_t mndProcessAlterVnodeRsp(SMnodeMsg *pMsg) { return 0; }
+static int32_t mndProcessDropVnodeRsp(SMnodeMsg *pMsg) { return 0; }
+static int32_t mndProcessSyncVnodeRsp(SMnodeMsg *pMsg) { return 0; }
+static int32_t mndProcessCompactVnodeRsp(SMnodeMsg *pMsg) { return 0; }
+
+static int32_t mndVgroupActionUpdate(SSdb *pSdb, SVgObj *pOldVgroup, SVgObj *pNewVgroup) {
+  mTrace("vgId:%d, perform update action", pOldVgroup->vgId);
+  pOldVgroup->vgId = pNewVgroup->vgId;
+  pOldVgroup->createdTime = pNewVgroup->createdTime;
+  pOldVgroup->updateTime = pNewVgroup->updateTime;
+  pOldVgroup->version = pNewVgroup->version;
+  memcpy(pOldVgroup->dbName, pNewVgroup->dbName, TSDB_FULL_DB_NAME_LEN);
+  pOldVgroup->replica = pNewVgroup->replica;
+  memcpy(pOldVgroup->vnodeGid, pNewVgroup->vnodeGid, TSDB_MAX_REPLICA * sizeof(SVnodeGid));
+  return 0;
+}
+
+SVgObj *mndAcquireVgroup(SMnode *pMnode, int32_t vgId) {
+  SSdb *pSdb = pMnode->pSdb;
+  return sdbAcquire(pSdb, SDB_VGROUP, &vgId);
+}
+
+void mndReleaseVgroup(SMnode *pMnode, SVgObj *pVgroup) {
+  SSdb *pSdb = pMnode->pSdb;
+  sdbRelease(pSdb, pVgroup);
+}
+
+static int32_t mndGetVgroupMaxReplica(SMnode *pMnode, char *dbName, int8_t *pReplica, int32_t *pNumOfVgroups) {
+  SSdb *pSdb = pMnode->pSdb;
+
+  SDbObj *pDb = mndAcquireDb(pMnode, dbName);
+  if (pDb == NULL) {
+    terrno = TSDB_CODE_MND_DB_NOT_SELECTED;
+    return -1;
+  }
+
+  int8_t  replica = 1;
+  int32_t numOfVgroups = 0;
+
+  void *pIter = NULL;
+  while (1) {
+    SVgObj *pVgroup = NULL;
+    pIter = sdbFetch(pSdb, SDB_VGROUP, pIter, (void **)&pVgroup);
+    if (pIter == NULL) break;
+
+    if (strcmp(pVgroup->dbName, dbName) == 0) {
+      replica = MAX(replica, pVgroup->replica);
+      numOfVgroups++;
+    }
+
+    sdbRelease(pSdb, pVgroup);
+  }
+
+  *pReplica = replica;
+  *pNumOfVgroups = numOfVgroups;
+  return 0;
+}
+
+static int32_t mndGetVgroupMeta(SMnodeMsg *pMsg, SShowObj *pShow, STableMetaMsg *pMeta) {
+  SMnode *pMnode = pMsg->pMnode;
+  SSdb   *pSdb = pMnode->pSdb;
+
+  if (mndGetVgroupMaxReplica(pMnode, pShow->db, &pShow->replica, &pShow->numOfRows) != 0) {
+    return -1;
+  }
+
+  int32_t  cols = 0;
+  SSchema *pSchema = pMeta->pSchema;
+
+  pShow->bytes[cols] = 4;
+  pSchema[cols].type = TSDB_DATA_TYPE_INT;
+  strcpy(pSchema[cols].name, "vgId");
+  pSchema[cols].bytes = htons(pShow->bytes[cols]);
+  cols++;
+
+  pShow->bytes[cols] = 4;
+  pSchema[cols].type = TSDB_DATA_TYPE_INT;
+  strcpy(pSchema[cols].name, "tables");
+  pSchema[cols].bytes = htons(pShow->bytes[cols]);
+  cols++;
+
+  for (int32_t i = 0; i < pShow->replica; ++i) {
+    pShow->bytes[cols] = 4;
+    pSchema[cols].type = TSDB_DATA_TYPE_SMALLINT;
+    snprintf(pSchema[cols].name, TSDB_COL_NAME_LEN, "v%d_dnode", i + 1);
+    pSchema[cols].bytes = htons(pShow->bytes[cols]);
+    cols++;
+
+    pShow->bytes[cols] = 9 + VARSTR_HEADER_SIZE;
+    pSchema[cols].type = TSDB_DATA_TYPE_BINARY;
+    snprintf(pSchema[cols].name, TSDB_COL_NAME_LEN, "v%d_status", i + 1);
+    pSchema[cols].bytes = htons(pShow->bytes[cols]);
+    cols++;
+  }
+
+  pMeta->numOfColumns = htons(cols);
+  pShow->numOfColumns = cols;
+
+  pShow->offset[0] = 0;
+  for (int32_t i = 1; i < cols; ++i) {
+    pShow->offset[i] = pShow->offset[i - 1] + pShow->bytes[i - 1];
+  }
+
+  pShow->rowSize = pShow->offset[cols - 1] + pShow->bytes[cols - 1];
+  strcpy(pMeta->tableFname, mndShowStr(pShow->type));
+
+  return 0;
+}
+
+static int32_t mndRetrieveVgroups(SMnodeMsg *pMsg, SShowObj *pShow, char *data, int32_t rows) {
+  SMnode *pMnode = pMsg->pMnode;
+  SSdb   *pSdb = pMnode->pSdb;
+  int32_t numOfRows = 0;
+  SVgObj *pVgroup = NULL;
+  int32_t cols = 0;
+  char   *pWrite;
+
+  while (numOfRows < rows) {
+    pShow->pIter = sdbFetch(pSdb, SDB_VGROUP, pShow->pIter, (void **)&pVgroup);
+    if (pShow->pIter == NULL) break;
+
+    cols = 0;
+
+    pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
+    *(int32_t *)pWrite = pVgroup->vgId;
+    cols++;
+
+    pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
+    *(int32_t *)pWrite = pVgroup->numOfTables;
+    cols++;
+
+    for (int32_t i = 0; i < pShow->replica; ++i) {
+      pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
+      *(int16_t *)pWrite = pVgroup->vnodeGid[i].dnodeId;
+      cols++;
+
+      const char *role = mndGetRoleStr(pVgroup->vnodeGid[i].role);
+      pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
+      STR_WITH_MAXSIZE_TO_VARSTR(pWrite, role, pShow->bytes[cols]);
+      cols++;
+    }
+
+    pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
+    *(int8_t *)pWrite = pVgroup->compact; 
+    cols++;
+    
+    sdbRelease(pSdb, pVgroup);
+    numOfRows++;
+  }
+
+  mnodeVacuumResult(data, pShow->numOfColumns, numOfRows, rows, pShow);
+  pShow->numOfReads += numOfRows;
+  return numOfRows;
+}
+
+static void mndCancelGetNextVgroup(SMnode *pMnode, void *pIter) {
+  SSdb *pSdb = pMnode->pSdb;
+  sdbCancelFetch(pSdb, pIter);
+}
+
+static int32_t mndGetVnodesNum(SMnode *pMnode, int32_t dnodeId) {
+  if (dnodeId == 0) {
+    return 0;
+  }
+
+  return 0;
+}
+
+static int32_t mndGetVnodeMeta(SMnodeMsg *pMsg, SShowObj *pShow, STableMetaMsg *pMeta) {
+  SMnode *pMnode = pMsg->pMnode;
+  SSdb   *pSdb = pMnode->pSdb;
+
+  int32_t  cols = 0;
+  SSchema *pSchema = pMeta->pSchema;
+
+  pShow->bytes[cols] = 4;
+  pSchema[cols].type = TSDB_DATA_TYPE_INT;
+  strcpy(pSchema[cols].name, "vgId");
+  pSchema[cols].bytes = htons(pShow->bytes[cols]);
+  cols++;
+
+  pShow->bytes[cols] = 12 + VARSTR_HEADER_SIZE;
+  pSchema[cols].type = TSDB_DATA_TYPE_BINARY;
+  strcpy(pSchema[cols].name, "status");
+  pSchema[cols].bytes = htons(pShow->bytes[cols]);
+  cols++;
+
+  pMeta->numOfColumns = htons(cols);
+  pShow->numOfColumns = cols;
+
+  pShow->offset[0] = 0;
+  for (int32_t i = 1; i < cols; ++i) {
+    pShow->offset[i] = pShow->offset[i - 1] + pShow->bytes[i - 1];
+  }
+
+  int32_t dnodeId = 0;
+  if (pShow->payloadLen > 0) {
+    dnodeId = atoi(pShow->payload);
+  }
+
+  pShow->replica = dnodeId;
+  pShow->numOfRows = mndGetVnodesNum(pMnode, dnodeId);
+  pShow->rowSize = pShow->offset[cols - 1] + pShow->bytes[cols - 1];
+  strcpy(pMeta->tableFname, mndShowStr(pShow->type));
+
+  return 0;
+}
+
+static int32_t mndRetrieveVnodes(SMnodeMsg *pMsg, SShowObj *pShow, char *data, int32_t rows) {
+  SMnode *pMnode = pMsg->pMnode;
+  SSdb   *pSdb = pMnode->pSdb;
+  int32_t numOfRows = 0;
+  SVgObj *pVgroup = NULL;
+  char   *pWrite;
+  int32_t cols = 0;
+  int32_t dnodeId = pShow->replica;
+
+  while (numOfRows < rows) {
+    pShow->pIter = sdbFetch(pSdb, SDB_VGROUP, pShow->pIter, (void **)&pVgroup);
+    if (pShow->pIter == NULL) break;
+
+    for (int32_t i = 0; i < pVgroup->replica && numOfRows < rows; ++i) {
+      SVnodeGid *pVgid = &pVgroup->vnodeGid[i];
+      if (pVgid->dnodeId != dnodeId) continue;
+
+      cols = 0;
+
+      pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
+      *(uint32_t *)pWrite = pVgroup->vgId;
+      cols++;
+
+      pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
+      STR_TO_VARSTR(pWrite, mndGetRoleStr(pVgid->role));
+      cols++;
+      numOfRows++;
+    }
+
+    sdbRelease(pSdb, pVgroup);
+  }
+
+  mnodeVacuumResult(data, pShow->numOfColumns, numOfRows, rows, pShow);
+  pShow->numOfReads += numOfRows;
+  return numOfRows;
+}
+
+static void mndCancelGetNextVnode(SMnode *pMnode, void *pIter) {
+  SSdb *pSdb = pMnode->pSdb;
+  sdbCancelFetch(pSdb, pIter);
+}
\ No newline at end of file

source/dnode/mnode/impl/src/mnode.c

@@ -22,7 +22,6 @@
 #include "mndDnode.h"
 #include "mndFunc.h"
 #include "mndMnode.h"
-#include "mndOper.h"
 #include "mndProfile.h"
 #include "mndShow.h"
 #include "mndStable.h"
@@ -333,7 +332,7 @@ SMnodeMsg *mndInitMsg(SMnode *pMnode, SRpcMsg *pRpcMsg) {
   SMnodeMsg *pMsg = taosAllocateQitem(sizeof(SMnodeMsg));
   if (pMsg == NULL) {
     terrno = TSDB_CODE_OUT_OF_MEMORY;
-    mError("failed to create msg since %s", terrstr());
+    mError("RPC:%p, app:%p failed to create msg since %s", pRpcMsg->handle, pRpcMsg->ahandle, terrstr());
     return NULL;
   }
 
@@ -341,7 +340,7 @@ SMnodeMsg *mndInitMsg(SMnode *pMnode, SRpcMsg *pRpcMsg) {
   if (rpcGetConnInfo(pRpcMsg->handle, &connInfo) != 0) {
     mndCleanupMsg(pMsg);
     terrno = TSDB_CODE_MND_NO_USER_FROM_CONN;
-    mError("failed to create msg since %s", terrstr());
+    mError("RPC:%p, app:%p failed to create msg since %s", pRpcMsg->handle, pRpcMsg->ahandle, terrstr());
     return NULL;
   }
   memcpy(pMsg->user, connInfo.user, TSDB_USER_LEN);
@@ -350,13 +349,13 @@ SMnodeMsg *mndInitMsg(SMnode *pMnode, SRpcMsg *pRpcMsg) {
   pMsg->rpcMsg = *pRpcMsg;
   pMsg->createdTime = taosGetTimestampSec();
 
-  mTrace("msg:%p, is created", pMsg);
+  mTrace("msg:%p, app:%p is created, RPC:%p", pMsg, pRpcMsg->ahandle, pRpcMsg->handle);
   return pMsg;
 }
 
 void mndCleanupMsg(SMnodeMsg *pMsg) {
+  mTrace("msg:%p, app:%p is destroyed, RPC:%p", pMsg, pMsg->rpcMsg.ahandle, pMsg->rpcMsg.handle);
   taosFreeQitem(pMsg);
-  mTrace("msg:%p, is destroyed", pMsg);
 }
 
 void mndSendRsp(SMnodeMsg *pMsg, int32_t code) {
@@ -371,7 +370,7 @@ static void mndProcessRpcMsg(SMnodeMsg *pMsg) {
   void   *ahandle = pMsg->rpcMsg.ahandle;
   bool    isReq = (msgType % 2 == 1);
 
-  mTrace("msg:%p, app:%p will be processed", pMsg, ahandle);
+  mTrace("msg:%p, app:%p type:%s will be processed", pMsg, ahandle, taosMsg[msgType]);
 
   if (isReq && !mndIsMaster(pMnode)) {
     code = TSDB_CODE_APP_NOT_READY;
@@ -393,7 +392,10 @@ static void mndProcessRpcMsg(SMnodeMsg *pMsg) {
   }
 
   code = (*fp)(pMsg);
-  if (code != 0) {
+  if (code == TSDB_CODE_MND_ACTION_IN_PROGRESS) {
+    mTrace("msg:%p, app:%p in progressing", pMsg, ahandle);
+    return;
+  } else if (code != 0) {
     code = terrno;
     mError("msg:%p, app:%p failed to process since %s", pMsg, ahandle, terrstr());
     goto PROCESS_RPC_END;

source/dnode/mnode/sdb/inc/sdbInt.h

@@ -71,7 +71,6 @@ typedef struct SSdb {
 } SSdb;
 
 int32_t sdbWriteFile(SSdb *pSdb);
-int32_t sdbWriteRaw(SSdb *pSdb, SSdbRaw *pRaw);
 
 #ifdef __cplusplus
 }

source/dnode/mnode/sdb/src/sdb.c

@@ -94,7 +94,7 @@ void sdbCleanup(SSdb *pSdb) {
     taosHashClear(hash);
     taosHashCleanup(hash);
     pSdb->hashObjs[i] = NULL;
-    mTrace("sdb table:%d is cleaned up", i);
+    mDebug("sdb table:%d is cleaned up", i);
   }
 
   free(pSdb);
@@ -129,7 +129,7 @@ int32_t sdbSetTable(SSdb *pSdb, SSdbTable table) {
 
   pSdb->hashObjs[sdbType] = hash;
   taosInitRWLatch(&pSdb->locks[sdbType]);
-  mTrace("sdb table:%d is initialized", sdbType);
+  mDebug("sdb table:%d is initialized", sdbType);
 
   return 0;
 }
\ No newline at end of file

source/dnode/mnode/sdb/src/sdbFile.c

@@ -118,7 +118,7 @@ int32_t sdbReadFile(SSdb *pSdb) {
       break;
     }
 
-    code = sdbWriteRaw(pSdb, pRaw);
+    code = sdbWriteNotFree(pSdb, pRaw);
     if (code != 0) {
       mError("failed to read file:%s since %s", file, terrstr());
       goto PARSE_SDB_DATA_ERROR;

source/dnode/mnode/sdb/src/sdbHash.c

@@ -52,11 +52,12 @@ static int32_t sdbInsertRow(SSdb *pSdb, SHashObj *hash, SSdbRaw *pRaw, SSdbRow *
   SRWLatch *pLock = &pSdb->locks[pRow->type];
   taosWLockLatch(pLock);
 
-  SSdbRow *pDstRow = taosHashGet(hash, pRow->pObj, keySize);
-  if (pDstRow != NULL) {
+  SSdbRow *pOldRow = taosHashGet(hash, pRow->pObj, keySize);
+  if (pOldRow != NULL) {
     taosWUnLockLatch(pLock);
     sdbFreeRow(pRow);
-    return TSDB_CODE_SDB_OBJ_ALREADY_THERE;
+    terrno = TSDB_CODE_SDB_OBJ_ALREADY_THERE;
+    return terrno;
   }
 
   pRow->refCount = 1;
@@ -65,7 +66,8 @@ static int32_t sdbInsertRow(SSdb *pSdb, SHashObj *hash, SSdbRaw *pRaw, SSdbRow *
   if (taosHashPut(hash, pRow->pObj, keySize, &pRow, sizeof(void *)) != 0) {
     taosWUnLockLatch(pLock);
     sdbFreeRow(pRow);
-    return TSDB_CODE_SDB_OBJ_ALREADY_THERE;
+    terrno = TSDB_CODE_SDB_OBJ_ALREADY_THERE;
+    return terrno;
   }
 
   taosWUnLockLatch(pLock);
@@ -78,35 +80,36 @@ static int32_t sdbInsertRow(SSdb *pSdb, SHashObj *hash, SSdbRaw *pRaw, SSdbRow *
       taosHashRemove(hash, pRow->pObj, keySize);
       taosWUnLockLatch(pLock);
       sdbFreeRow(pRow);
-      return code;
+      terrno = code;
+      return terrno;
     }
   }
 
   return 0;
 }
 
-static int32_t sdbUpdateRow(SSdb *pSdb, SHashObj *hash, SSdbRaw *pRaw, SSdbRow *pRow, int32_t keySize) {
+static int32_t sdbUpdateRow(SSdb *pSdb, SHashObj *hash, SSdbRaw *pRaw, SSdbRow *pNewRow, int32_t keySize) {
   int32_t code = 0;
 
-  SRWLatch *pLock = &pSdb->locks[pRow->type];
+  SRWLatch *pLock = &pSdb->locks[pNewRow->type];
   taosRLockLatch(pLock);
 
-  SSdbRow **ppDstRow = taosHashGet(hash, pRow->pObj, keySize);
-  if (ppDstRow == NULL || *ppDstRow == NULL) {
+  SSdbRow **ppOldRow = taosHashGet(hash, pNewRow->pObj, keySize);
+  if (ppOldRow == NULL || *ppOldRow == NULL) {
     taosRUnLockLatch(pLock);
-    return sdbInsertRow(pSdb, hash, pRaw, pRow, keySize);
+    return sdbInsertRow(pSdb, hash, pRaw, pNewRow, keySize);
   }
-  SSdbRow *pDstRow = *ppDstRow;
+  SSdbRow *pOldRow = *ppOldRow;
 
-  pRow->status = pRaw->status;
+  pOldRow->status = pRaw->status;
   taosRUnLockLatch(pLock);
 
-  SdbUpdateFp updateFp = pSdb->updateFps[pRow->type];
+  SdbUpdateFp updateFp = pSdb->updateFps[pNewRow->type];
   if (updateFp != NULL) {
-    code = (*updateFp)(pSdb, pRow->pObj, pDstRow->pObj);
+    code = (*updateFp)(pSdb, pOldRow->pObj, pNewRow->pObj);
   }
 
-  sdbFreeRow(pRow);
+  sdbFreeRow(pNewRow);
   return code;
 }
 
@@ -116,29 +119,30 @@ static int32_t sdbDeleteRow(SSdb *pSdb, SHashObj *hash, SSdbRaw *pRaw, SSdbRow *
   SRWLatch *pLock = &pSdb->locks[pRow->type];
   taosWLockLatch(pLock);
 
-  SSdbRow **ppDstRow = taosHashGet(hash, pRow->pObj, keySize);
-  if (ppDstRow == NULL || *ppDstRow == NULL) {
+  SSdbRow **ppOldRow = taosHashGet(hash, pRow->pObj, keySize);
+  if (ppOldRow == NULL || *ppOldRow == NULL) {
     taosWUnLockLatch(pLock);
     sdbFreeRow(pRow);
-    return TSDB_CODE_SDB_OBJ_NOT_THERE;
+    terrno = TSDB_CODE_SDB_OBJ_NOT_THERE;
+    return terrno;
   }
-  SSdbRow *pDstRow = *ppDstRow;
+  SSdbRow *pOldRow = *ppOldRow;
 
-  pDstRow->status = pRaw->status;
-  taosHashRemove(hash, pDstRow->pObj, keySize);
+  pOldRow->status = pRaw->status;
+  taosHashRemove(hash, pOldRow->pObj, keySize);
   taosWUnLockLatch(pLock);
 
-  SdbDeleteFp deleteFp = pSdb->deleteFps[pDstRow->type];
+  SdbDeleteFp deleteFp = pSdb->deleteFps[pOldRow->type];
   if (deleteFp != NULL) {
-    code = (*deleteFp)(pSdb, pDstRow->pObj);
+    code = (*deleteFp)(pSdb, pOldRow->pObj);
   }
 
-  sdbRelease(pSdb, pDstRow->pObj);
+  sdbRelease(pSdb, pOldRow->pObj);
   sdbFreeRow(pRow);
   return code;
 }
 
-int32_t sdbWriteRaw(SSdb *pSdb, SSdbRaw *pRaw) {
+int32_t sdbWriteNotFree(SSdb *pSdb, SSdbRaw *pRaw) {
   SHashObj *hash = sdbGetHash(pSdb, pRaw->type);
   if (hash == NULL) return terrno;
 
@@ -170,7 +174,7 @@ int32_t sdbWriteRaw(SSdb *pSdb, SSdbRaw *pRaw) {
 }
 
 int32_t sdbWrite(SSdb *pSdb, SSdbRaw *pRaw) {
-  int32_t code = sdbWriteRaw(pSdb, pRaw);
+  int32_t code = sdbWriteNotFree(pSdb, pRaw);
   sdbFreeRaw(pRaw);
   return code;
 }

source/dnode/mnode/sdb/src/sdbRaw.c

@@ -26,10 +26,15 @@ SSdbRaw *sdbAllocRaw(ESdbType type, int8_t sver, int32_t dataLen) {
   pRaw->type = type;
   pRaw->sver = sver;
   pRaw->dataLen = dataLen;
+
+  mTrace("raw:%p, is created, len:%d", pRaw, dataLen);
   return pRaw;
 }
 
-void sdbFreeRaw(SSdbRaw *pRaw) { free(pRaw); }
+void sdbFreeRaw(SSdbRaw *pRaw) {
+  mTrace("raw:%p, is freed", pRaw);
+  free(pRaw);
+}
 
 int32_t sdbSetRawInt8(SSdbRaw *pRaw, int32_t dataPos, int8_t val) {
   if (pRaw == NULL) {

source/dnode/vnode/impl/CMakeLists.txt

@@ -18,6 +18,6 @@ target_link_libraries(
 )
 
 # test
-if(${BUILD_TEST})
-    add_subdirectory(test)
-endif(${BUILD_TEST})
+#if(${BUILD_TEST})
+#    add_subdirectory(test)
+#endif(${BUILD_TEST})
\ No newline at end of file

source/libs/function/src/tfunction.c

@@ -343,7 +343,7 @@ bool isProjectionQueryOnSTable(SArray* pFunctionIdList, int32_t tableIndex) {
 //
 //    if (functionId < 0) {
 //      SUdfInfo* pUdfInfo = taosArrayGet(pQueryInfo->pUdfInfo, -1 * functionId - 1);
-//      if (pUdfInfo->funcType == TSDB_UDF_TYPE_AGGREGATE) {
+//      if (pUdfInfo->funcType == TSDB_FUNC_TYPE_AGGREGATE) {
 //        return false;
 //      }
 //

source/libs/function/src/tudf.c

@@ -146,7 +146,7 @@ void doInvokeUdf(struct SUdfInfo* pUdfInfo, SQLFunctionCtx *pCtx, int32_t idx, i
           pCtx->pOutput, interBuf, (char *)pCtx->ptsOutputBuf, &output, pCtx->resDataInfo.type, pCtx->resDataInfo.bytes, &pUdfInfo->init);
       }
 
-      if (pUdfInfo->funcType == TSDB_UDF_TYPE_AGGREGATE) {
+      if (pUdfInfo->funcType == TSDB_FUNC_TYPE_AGGREGATE) {
         pCtx->resultInfo->numOfRes = output;
       } else {
         pCtx->resultInfo->numOfRes += output;

source/libs/index/src/index_fst.c

@@ -591,14 +591,14 @@ uint64_t fstStateFindInput(FstState *s, FstNode *node, uint8_t b, bool *null) {
     uint8_t *data = fstSliceData(&t, &len);
     int i = 0;
     for(; i < len; i++) {
-      //uint8_t v = slice->data[slice->start + i];
-      ////slice->data[slice->start + i];
       uint8_t v = data[i]; 
       if (v == b) {
+        fstSliceDestroy(&t);
         return node->nTrans - i - 1; // bug  
       }
     } 
     if (i == len) { *null = true; }
+    fstSliceDestroy(&t);
   } 
 }
 
@@ -634,7 +634,7 @@ FstNode *fstNodeCreate(int64_t version, CompiledAddr addr, FstSlice *slice) {
   } else if (st.state == OneTrans) {
      FstSlice data = fstSliceCopy(slice, 0, addr); 
      PackSizes sz = fstStateSizes(&st, &data);
-     n->data    =   fstSliceCopy(slice, 0, addr); 
+     n->data    =   data; 
      n->version = version; 
      n->state   = st; 
      n->start   = addr;
@@ -803,6 +803,7 @@ void fstBuilderDestroy(FstBuilder *b) {
   fstCountingWriterDestroy(b->wrt); 
   fstUnFinishedNodesDestroy(b->unfinished); 
   fstRegistryDestroy(b->registry);
+  fstSliceDestroy(&b->last);
   free(b);
 }
 
@@ -851,8 +852,9 @@ void fstBuilderInsertOutput(FstBuilder *b, FstSlice bs, Output in) {
 OrderType fstBuilderCheckLastKey(FstBuilder *b, FstSlice bs, bool ckDup) {
   FstSlice *input = &bs;
   if (fstSliceIsEmpty(&b->last)) {
+    fstSliceDestroy(&b->last);
     // deep copy or not
-    b->last = fstSliceCopy(&bs, input->start, input->end);
+    b->last = fstSliceDeepCopy(&bs, input->start, input->end);
   } else {
     int comp = fstSliceCompare(&b->last, &bs);
     if (comp == 0 && ckDup) {
@@ -862,20 +864,22 @@ OrderType fstBuilderCheckLastKey(FstBuilder *b, FstSlice bs, bool ckDup) {
     }
     // deep copy or not
     fstSliceDestroy(&b->last);
-    b->last = fstSliceCopy(&bs, input->start, input->end); 
+    b->last = fstSliceDeepCopy(&bs, input->start, input->end); 
   }       
   return Ordered;
 } 
 void fstBuilderCompileFrom(FstBuilder *b, uint64_t istate) {
   CompiledAddr addr = NONE_ADDRESS;
   while (istate + 1 < FST_UNFINISHED_NODES_LEN(b->unfinished)) {
-    FstBuilderNode *n = NULL;
+    FstBuilderNode *bn = NULL;
     if (addr == NONE_ADDRESS) {
-      n = fstUnFinishedNodesPopEmpty(b->unfinished);
+      bn = fstUnFinishedNodesPopEmpty(b->unfinished);
     } else {
-      n = fstUnFinishedNodesPopFreeze(b->unfinished, addr);
+      bn = fstUnFinishedNodesPopFreeze(b->unfinished, addr);
     }
-    addr = fstBuilderCompile(b, n);
+    addr = fstBuilderCompile(b, bn);
+
+    fstBuilderNodeDestroy(bn);
     assert(addr != NONE_ADDRESS);      
     //fstBuilderNodeDestroy(n);
   }
@@ -910,6 +914,7 @@ void* fstBuilderInsertInner(FstBuilder *b) {
   fstBuilderCompileFrom(b, 0);  
   FstBuilderNode *rootNode = fstUnFinishedNodesPopRoot(b->unfinished); 
   CompiledAddr  rootAddr = fstBuilderCompile(b, rootNode);
+  fstBuilderNodeDestroy(rootNode);
 
   char  buf64[8] = {0}; 
 
@@ -1026,7 +1031,10 @@ Fst* fstCreate(FstSlice *slice) {
   fst->meta->ty       = type;
   fst->meta->len      = fstLen;
   fst->meta->checkSum = checkSum;
-  fst->data = slice; 
+
+  FstSlice *s = calloc(1, sizeof(FstSlice));
+  *s =  fstSliceCopy(slice, 0, FST_SLICE_LEN(slice));
+  fst->data = s; 
   
   return fst;
 
@@ -1038,7 +1046,8 @@ FST_CREAT_FAILED:
 void fstDestroy(Fst *fst) {
   if (fst) { 
     free(fst->meta); 
-    fstNodeDestroy(fst->root);  
+    fstSliceDestroy(fst->data);
+    free(fst->data);
   } 
   free(fst); 
 }
@@ -1048,6 +1057,9 @@ bool fstGet(Fst *fst, FstSlice *b, Output *out) {
   Output tOut = 0; 
   int32_t len;
   uint8_t *data = fstSliceData(b, &len);
+
+  SArray *nodes = (SArray *)taosArrayInit(len,  sizeof(FstNode *));   
+  taosArrayPush(nodes, &root);
   for (uint32_t i = 0; i < len; i++) {
     uint8_t inp = data[i];
     Output  res = 0;
@@ -1059,12 +1071,22 @@ bool fstGet(Fst *fst, FstSlice *b, Output *out) {
     fstNodeGetTransitionAt(root, res, &trn);
     tOut += trn.out; 
     root = fstGetNode(fst, trn.addr);
+    taosArrayPush(nodes, &root);
+    //fstNodeDestroy(root);
   }
   if (!FST_NODE_IS_FINAL(root)) {
     return false;
   } else {
     tOut = tOut + FST_NODE_FINAL_OUTPUT(root); 
   }
+
+  for (size_t i = 0; i < taosArrayGetSize(nodes); i++) {
+     FstNode **node = (FstNode **)taosArrayGet(nodes, i); 
+     fstNodeDestroy(*node);
+  }
+  taosArrayDestroy(nodes);
+
+  fst->root = NULL;
   *out = tOut;
   
   return true; 
@@ -1228,6 +1250,7 @@ bool streamWithStateSeekMin(StreamWithState *sws, FstBoundWithData *min) {
       taosArrayPush(sws->stack, &s);
       out += trn.out;
       node = fstGetNode(sws->fst, trn.addr);  
+      fstNodeDestroy(node);
     } else {
 
       // This is a little tricky. We're in this case if the

source/libs/parser/inc/sql.y

@@ -112,13 +112,13 @@ cmd ::= SHOW dbPrefix(X) TABLES LIKE ids(Y).         {
 }
 
 cmd ::= SHOW dbPrefix(X) STABLES.      {
-    setShowOptions(pInfo, TSDB_MGMT_TABLE_METRIC, &X, 0);
+    setShowOptions(pInfo, TSDB_MGMT_TABLE_STABLE, &X, 0);
 }
 
 cmd ::= SHOW dbPrefix(X) STABLES LIKE ids(Y).      {
     SToken token;
     tSetDbName(&token, &X);
-    setShowOptions(pInfo, TSDB_MGMT_TABLE_METRIC, &token, &Y);
+    setShowOptions(pInfo, TSDB_MGMT_TABLE_STABLE, &token, &Y);
 }
 
 cmd ::= SHOW dbPrefix(X) VGROUPS.    {

source/libs/parser/src/astGenerator.c

@@ -972,13 +972,6 @@ void setDefaultCreateDbOption(SCreateDbInfo *pDBInfo) {
   memset(&pDBInfo->precision, 0, sizeof(SToken));
 }
 
-void setDefaultCreateTopicOption(SCreateDbInfo *pDBInfo) {
-  setDefaultCreateDbOption(pDBInfo);
-
-  pDBInfo->dbType = TSDB_DB_TYPE_TOPIC;
-  pDBInfo->partitions = TSDB_DEFAULT_DB_PARTITON_OPTION;
-}
-
 // prefix show db.tables;
 void tSetDbName(SToken *pCpxName, SToken *pDb) {
   pCpxName->type = pDb->type;

source/libs/parser/src/parserUtil.c

@@ -1480,7 +1480,7 @@ STableMeta* createSuperTableMeta(STableMetaMsg* pChild) {
   pTableMeta->tversion = pChild->tversion;
   pTableMeta->sversion = pChild->sversion;
 
-  memcpy(pTableMeta->schema, pChild->schema, sizeof(SSchema) * total);
+  memcpy(pTableMeta->schema, pChild->pSchema, sizeof(SSchema) * total);
 
   int32_t num = pTableMeta->tableInfo.numOfColumns;
   for(int32_t i = 0; i < num; ++i) {

source/libs/parser/src/sql.c

@@ -2312,14 +2312,14 @@ static void yy_reduce(
         break;
       case 26: /* cmd ::= SHOW dbPrefix STABLES */
 {
-    setShowOptions(pInfo, TSDB_MGMT_TABLE_METRIC, &yymsp[-1].minor.yy0, 0);
+    setShowOptions(pInfo, TSDB_MGMT_TABLE_STABLE, &yymsp[-1].minor.yy0, 0);
 }
         break;
       case 27: /* cmd ::= SHOW dbPrefix STABLES LIKE ids */
 {
     SToken token;
     tSetDbName(&token, &yymsp[-3].minor.yy0);
-    setShowOptions(pInfo, TSDB_MGMT_TABLE_METRIC, &token, &yymsp[0].minor.yy0);
+    setShowOptions(pInfo, TSDB_MGMT_TABLE_STABLE, &token, &yymsp[0].minor.yy0);
 }
         break;
       case 28: /* cmd ::= SHOW dbPrefix VGROUPS */

source/util/src/terror.c

@@ -211,32 +211,41 @@ TAOS_DEFINE_ERROR(TSDB_CODE_MND_INVALID_STABLE_NAME,      "Super table does not
 TAOS_DEFINE_ERROR(TSDB_CODE_MND_INVALID_CREATE_TABLE_MSG, "Invalid create table message")
 TAOS_DEFINE_ERROR(TSDB_CODE_MND_EXCEED_MAX_ROW_BYTES,     "Exceed max row bytes")
 
-TAOS_DEFINE_ERROR(TSDB_CODE_MND_INVALID_FUNC_NAME,        "Invalid func name")
-TAOS_DEFINE_ERROR(TSDB_CODE_MND_INVALID_FUNC_LEN,         "Invalid func length")
-TAOS_DEFINE_ERROR(TSDB_CODE_MND_INVALID_FUNC_CODE,        "Invalid func code")
 TAOS_DEFINE_ERROR(TSDB_CODE_MND_FUNC_ALREADY_EXIST,       "Func already exists")
+TAOS_DEFINE_ERROR(TSDB_CODE_MND_FUNC_NOT_EXIST,           "Func not exists")
 TAOS_DEFINE_ERROR(TSDB_CODE_MND_INVALID_FUNC,             "Invalid func")
+TAOS_DEFINE_ERROR(TSDB_CODE_MND_INVALID_FUNC_NAME,        "Invalid func name")
+TAOS_DEFINE_ERROR(TSDB_CODE_MND_INVALID_FUNC_COMMENT,     "Invalid func comment")
+TAOS_DEFINE_ERROR(TSDB_CODE_MND_INVALID_FUNC_CODE,        "Invalid func code")
 TAOS_DEFINE_ERROR(TSDB_CODE_MND_INVALID_FUNC_BUFSIZE,     "Invalid func bufSize")
 
 TAOS_DEFINE_ERROR(TSDB_CODE_MND_INVALID_TAG_LENGTH,        "invalid tag length")
 TAOS_DEFINE_ERROR(TSDB_CODE_MND_INVALID_COLUMN_LENGTH,     "invalid column length")
 
 TAOS_DEFINE_ERROR(TSDB_CODE_MND_DB_NOT_SELECTED,          "Database not specified or available")
+TAOS_DEFINE_ERROR(TSDB_CODE_MND_DB_NOT_EXIST,             "Database not exist")
 TAOS_DEFINE_ERROR(TSDB_CODE_MND_DB_ALREADY_EXIST,         "Database already exists")
-TAOS_DEFINE_ERROR(TSDB_CODE_MND_INVALID_DB_OPTION,        "Invalid database options")
 TAOS_DEFINE_ERROR(TSDB_CODE_MND_INVALID_DB,               "Invalid database name")
-TAOS_DEFINE_ERROR(TSDB_CODE_MND_MONITOR_DB_FORBIDDEN,     "Cannot delete monitor database")
+TAOS_DEFINE_ERROR(TSDB_CODE_MND_INVALID_DB_OPTION,        "Invalid database options")
+TAOS_DEFINE_ERROR(TSDB_CODE_MND_INVALID_DB_CACHE_SIZE,    "Invalid database cache block size option")
+TAOS_DEFINE_ERROR(TSDB_CODE_MND_INVALID_DB_TOTAL_BLOCKS,  "Invalid database total blocks option")
+TAOS_DEFINE_ERROR(TSDB_CODE_MND_INVALID_DB_DAYS,          "Invalid database days option")
+TAOS_DEFINE_ERROR(TSDB_CODE_MND_INVALID_DB_KEEP0,         "Invalid database keep0 option")
+TAOS_DEFINE_ERROR(TSDB_CODE_MND_INVALID_DB_KEEP1,         "Invalid database keep1 option")
+TAOS_DEFINE_ERROR(TSDB_CODE_MND_INVALID_DB_KEEP2,         "Invalid database keep2 option")
+TAOS_DEFINE_ERROR(TSDB_CODE_MND_INVALID_DB_MIN_ROWS,      "Invalid database min rows option")
+TAOS_DEFINE_ERROR(TSDB_CODE_MND_INVALID_DB_MAX_ROWS,      "Invalid database max rows option")
+TAOS_DEFINE_ERROR(TSDB_CODE_MND_INVALID_DB_COMMIT_TIME,   "Invalid database commit time option")
+TAOS_DEFINE_ERROR(TSDB_CODE_MND_INVALID_DB_FSYNC_PERIOD,  "Invalid database fsync periodoptions")
+TAOS_DEFINE_ERROR(TSDB_CODE_MND_INVALID_DB_WAL_LEVEL,     "Invalid database wal level option")
+TAOS_DEFINE_ERROR(TSDB_CODE_MND_INVALID_DB_PRECISION,     "Invalid database precisin option")
+TAOS_DEFINE_ERROR(TSDB_CODE_MND_INVALID_DB_COMP,          "Invalid database compression option")
+TAOS_DEFINE_ERROR(TSDB_CODE_MND_INVALID_DB_REPLICA,       "Invalid database replication option")
+TAOS_DEFINE_ERROR(TSDB_CODE_MND_INVALID_DB_QUORUM,        "Invalid database quorum option")
+TAOS_DEFINE_ERROR(TSDB_CODE_MND_INVALID_DB_UPDATE,        "Invalid database update option")
+TAOS_DEFINE_ERROR(TSDB_CODE_MND_INVALID_DB_CACHE_LAST,    "Invalid database cache last option")
+TAOS_DEFINE_ERROR(TSDB_CODE_MND_DB_OPTION_UNCHANGED,      "Database options not changed")
 TAOS_DEFINE_ERROR(TSDB_CODE_MND_TOO_MANY_DATABASES,       "Too many databases for account")
-TAOS_DEFINE_ERROR(TSDB_CODE_MND_DB_IN_DROPPING,           "Database not available")
-TAOS_DEFINE_ERROR(TSDB_CODE_MND_VGROUP_NOT_READY,         "Database unsynced")
-
-TAOS_DEFINE_ERROR(TSDB_CODE_MND_INVALID_DB_OPTION_DAYS,   "Invalid database option: days out of range")
-TAOS_DEFINE_ERROR(TSDB_CODE_MND_INVALID_DB_OPTION_KEEP,   "Invalid database option: keep2 >= keep1 >= keep0 >= days")
-
-TAOS_DEFINE_ERROR(TSDB_CODE_MND_INVALID_TOPIC,            "Invalid topic name")
-TAOS_DEFINE_ERROR(TSDB_CODE_MND_INVALID_TOPIC_OPTION,     "Invalid topic option")
-TAOS_DEFINE_ERROR(TSDB_CODE_MND_INVALID_TOPIC_PARTITONS,  "Invalid topic partitons num, valid range: [1, 1000]")
-TAOS_DEFINE_ERROR(TSDB_CODE_MND_TOPIC_ALREADY_EXIST,      "Topic already exists")
 
 // dnode
 TAOS_DEFINE_ERROR(TSDB_CODE_DND_ACTION_IN_PROGRESS,       "Action in progress")

source/util/src/tutil.c

@@ -187,7 +187,7 @@ char *strnchr(char *haystack, char needle, int32_t len, bool skipquote) {
 }
 
 char* strtolower(char *dst, const char *src) {
-  int esc = 0;
+  int32_t esc = 0;
   char quote = 0, *p = dst, c;
 
   assert(dst != NULL);
@@ -214,7 +214,7 @@ char* strtolower(char *dst, const char *src) {
 }
 
 char* strntolower(char *dst, const char *src, int32_t n) {
-  int esc = 0;
+  int32_t esc = 0;
   char quote = 0, *p = dst, c;
 
   assert(dst != NULL);
@@ -347,7 +347,7 @@ char *strbetween(char *string, char *begin, char *end) {
   char *_begin = strstr(string, begin);
   if (_begin != NULL) {
     char *_end = strstr(_begin + strlen(begin), end);
-    int   size = (int)(_end - _begin);
+    int32_t   size = (int32_t)(_end - _begin);
     if (_end != NULL && size > 0) {
       result = (char *)calloc(1, size);
       memcpy(result, _begin + strlen(begin), size - +strlen(begin));
@@ -402,7 +402,7 @@ int32_t taosHexStrToByteArray(char hexstr[], char bytes[]) {
 
 char *taosIpStr(uint32_t ipInt) {
   static char ipStrArray[3][30];
-  static int ipStrIndex = 0;
+  static int32_t ipStrIndex = 0;
 
   char *ipStr = ipStrArray[(ipStrIndex++) % 3];
   //sprintf(ipStr, "0x%x:%u.%u.%u.%u", ipInt, ipInt & 0xFF, (ipInt >> 8) & 0xFF, (ipInt >> 16) & 0xFF, (uint8_t)(ipInt >> 24));
@@ -416,4 +416,17 @@ void taosIp2String(uint32_t ip, char *str) {
 
 void taosIpPort2String(uint32_t ip, uint16_t port, char *str) {
   sprintf(str, "%u.%u.%u.%u:%u", ip & 0xFF, (ip >> 8) & 0xFF, (ip >> 16) & 0xFF, (uint8_t)(ip >> 24), port);
+}
+
+int32_t taosGetFqdnPortFromEp(const char *ep, char *fqdn, uint16_t *port) {
+  *port = 0;
+  strcpy(fqdn, ep);
+
+  char *temp = strchr(fqdn, ':');
+  if (temp) {
+    *temp = 0;
+    *port = atoi(temp + 1);
+  }
+
+  return 0;
 }
\ No newline at end of file