minor changes

include/util/taoserror.h

@@ -230,6 +230,10 @@ int32_t* taosGetErrno();
 #define TSDB_CODE_MND_INVALID_FUNC_CODE         TAOS_DEF_ERROR_CODE(0, 0x03C5)
 #define TSDB_CODE_MND_INVALID_FUNC_BUFSIZE      TAOS_DEF_ERROR_CODE(0, 0x03C6)
 
+// mnode-trans
+#define TSDB_CODE_MND_TRANS_ALREADY_EXIST       TAOS_DEF_ERROR_CODE(0, 0x03D0)
+#define TSDB_CODE_MND_TRANS_NOT_EXIST           TAOS_DEF_ERROR_CODE(0, 0x03D1)
+
 // dnode
 #define TSDB_CODE_DND_ACTION_IN_PROGRESS        TAOS_DEF_ERROR_CODE(0, 0x0400)
 #define TSDB_CODE_DND_EXITING                   TAOS_DEF_ERROR_CODE(0, 0x0401)

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

@@ -61,8 +61,12 @@ int32_t mndInitMnode(SMnode *pMnode) {
 void mndCleanupMnode(SMnode *pMnode) {}
 
 static SMnodeObj *mndAcquireMnode(SMnode *pMnode, int32_t mnodeId) {
-  SSdb *pSdb = pMnode->pSdb;
-  return sdbAcquire(pSdb, SDB_MNODE, &mnodeId);
+  SSdb      *pSdb = pMnode->pSdb;
+  SMnodeObj *pObj = sdbAcquire(pSdb, SDB_MNODE, &mnodeId);
+  if (pObj == NULL) {
+    terrno = TSDB_CODE_MND_MNODE_NOT_EXIST;
+  }
+  return pObj;
 }
 
 static void mndReleaseMnode(SMnode *pMnode, SMnodeObj *pMnodeObj) {

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

@@ -23,7 +23,7 @@
 #include "mndUser.h"
 #include "tname.h"
 
-#define TSDB_STB_VER_NUM 1
+#define TSDB_STB_VER_NUMBER 1
 #define TSDB_STB_RESERVE_SIZE 64
 
 static SSdbRaw *mndStbActionEncode(SStbObj *pStb);
@@ -70,7 +70,7 @@ void mndCleanupStb(SMnode *pMnode) {}
 
 static SSdbRaw *mndStbActionEncode(SStbObj *pStb) {
   int32_t  size = sizeof(SStbObj) + (pStb->numOfColumns + pStb->numOfTags) * sizeof(SSchema) + TSDB_STB_RESERVE_SIZE;
-  SSdbRaw *pRaw = sdbAllocRaw(SDB_STB, TSDB_STB_VER_NUM, size);
+  SSdbRaw *pRaw = sdbAllocRaw(SDB_STB, TSDB_STB_VER_NUMBER, size);
   if (pRaw == NULL) return NULL;
 
   int32_t dataPos = 0;
@@ -103,7 +103,7 @@ static SSdbRow *mndStbActionDecode(SSdbRaw *pRaw) {
   int8_t sver = 0;
   if (sdbGetRawSoftVer(pRaw, &sver) != 0) return NULL;
 
-  if (sver != TSDB_STB_VER_NUM) {
+  if (sver != TSDB_STB_VER_NUMBER) {
     mError("failed to decode stable since %s", terrstr());
     terrno = TSDB_CODE_SDB_INVALID_DATA_VER;
     return NULL;
@@ -176,8 +176,12 @@ static int32_t mndStbActionUpdate(SSdb *pSdb, SStbObj *pOldStb, SStbObj *pNewStb
 }
 
 SStbObj *mndAcquireStb(SMnode *pMnode, char *stbName) {
-  SSdb *pSdb = pMnode->pSdb;
-  return sdbAcquire(pSdb, SDB_STB, stbName);
+  SSdb    *pSdb = pMnode->pSdb;
+  SStbObj *pStb = sdbAcquire(pSdb, SDB_STB, stbName);
+  if (pStb == NULL) {
+    terrno = TSDB_CODE_MND_STB_NOT_EXIST;
+  }
+  return pStb;
 }
 
 void mndReleaseStb(SMnode *pMnode, SStbObj *pStb) {

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

@@ -317,8 +317,12 @@ static int32_t mndTransActionUpdate(SSdb *pSdb, STrans *pOldTrans, STrans *pNewT
 }
 
 STrans *mndAcquireTrans(SMnode *pMnode, int32_t transId) {
-  SSdb *pSdb = pMnode->pSdb;
-  return sdbAcquire(pSdb, SDB_TRANS, &transId);
+  SSdb   *pSdb = pMnode->pSdb;
+  STrans *pTrans = sdbAcquire(pSdb, SDB_TRANS, &transId);
+  if (pTrans == NULL) {
+    terrno = TSDB_CODE_MND_TRANS_NOT_EXIST;
+  }
+  return pTrans;
 }
 
 void mndReleaseTrans(SMnode *pMnode, STrans *pTrans) {

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

@@ -175,8 +175,12 @@ static int32_t mndUserActionUpdate(SSdb *pSdb, SUserObj *pOldUser, SUserObj *pNe
 }
 
 SUserObj *mndAcquireUser(SMnode *pMnode, char *userName) {
-  SSdb *pSdb = pMnode->pSdb;
-  return sdbAcquire(pSdb, SDB_USER, userName);
+  SSdb     *pSdb = pMnode->pSdb;
+  SUserObj *pUser = sdbAcquire(pSdb, SDB_USER, userName);
+  if (pUser == NULL) {
+    terrno = TSDB_CODE_MND_DB_NOT_EXIST;
+  }
+  return pUser;
 }
 
 void mndReleaseUser(SMnode *pMnode, SUserObj *pUser) {

source/util/src/terror.c

@@ -240,6 +240,10 @@ 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")
 
+// mnode-trans
+TAOS_DEFINE_ERROR(TSDB_CODE_MND_TRANS_ALREADY_EXIST,       "Transaction already exists")
+TAOS_DEFINE_ERROR(TSDB_CODE_MND_TRANS_NOT_EXIST,           "Transaction not exists")
+
 // dnode
 TAOS_DEFINE_ERROR(TSDB_CODE_DND_ACTION_IN_PROGRESS,       "Action in progress")
 TAOS_DEFINE_ERROR(TSDB_CODE_DND_EXITING,                  "Dnode is exiting")