tmsg.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_COMMON_TAOS_MSG_H_
#define _TD_COMMON_TAOS_MSG_H_

#ifdef __cplusplus
extern "C" {
#endif

#include "encode.h"
#include "taosdef.h"
#include "taoserror.h"
#include "tarray.h"
#include "tcoding.h"
#include "tdataformat.h"
#include "thash.h"
#include "tlist.h"

/* ------------------------ MESSAGE DEFINITIONS ------------------------ */
#define TD_MSG_NUMBER_
#undef TD_MSG_DICT_
#undef TD_MSG_INFO_
#undef TD_MSG_SEG_CODE_
#include "tmsgdef.h"

#undef TD_MSG_NUMBER_
#undef TD_MSG_DICT_
#undef TD_MSG_INFO_
#define TD_MSG_SEG_CODE_
#include "tmsgdef.h"

#undef TD_MSG_NUMBER_
#undef TD_MSG_DICT_
#undef TD_MSG_INFO_
#undef TD_MSG_SEG_CODE_
#include "tmsgdef.h"

extern char* tMsgInfo[];
extern int   tMsgDict[];

#define TMSG_SEG_CODE(TYPE) (((TYPE)&0xff00) >> 8)
#define TMSG_SEG_SEQ(TYPE) ((TYPE)&0xff)
#define TMSG_INFO(TYPE) tMsgInfo[tMsgDict[TMSG_SEG_CODE(TYPE)] + TMSG_SEG_SEQ(TYPE)]
#define TMSG_INDEX(TYPE) (tMsgDict[TMSG_SEG_CODE(TYPE)] + TMSG_SEG_SEQ(TYPE))

typedef uint16_t tmsg_t;

/* ------------------------ OTHER DEFINITIONS ------------------------ */
// IE type
#define TSDB_IE_TYPE_SEC 1
#define TSDB_IE_TYPE_META 2
#define TSDB_IE_TYPE_MGMT_IP 3
#define TSDB_IE_TYPE_DNODE_CFG 4
#define TSDB_IE_TYPE_NEW_VERSION 5
#define TSDB_IE_TYPE_DNODE_EXT 6
#define TSDB_IE_TYPE_DNODE_STATE 7

typedef enum {
  HEARTBEAT_TYPE_MQ    = 0,
  HEARTBEAT_TYPE_QUERY = 1,
  // types can be added here
  //
  HEARTBEAT_TYPE_MAX
} EHbType;

typedef enum _mgmt_table {
  TSDB_MGMT_TABLE_START,
  TSDB_MGMT_TABLE_ACCT,
  TSDB_MGMT_TABLE_USER,
  TSDB_MGMT_TABLE_DB,
  TSDB_MGMT_TABLE_TABLE,
  TSDB_MGMT_TABLE_DNODE,
  TSDB_MGMT_TABLE_MNODE,
  TSDB_MGMT_TABLE_QNODE,
  TSDB_MGMT_TABLE_SNODE,
  TSDB_MGMT_TABLE_BNODE,
  TSDB_MGMT_TABLE_VGROUP,
  TSDB_MGMT_TABLE_STB,
  TSDB_MGMT_TABLE_MODULE,
  TSDB_MGMT_TABLE_QUERIES,
  TSDB_MGMT_TABLE_STREAMS,
  TSDB_MGMT_TABLE_VARIABLES,
  TSDB_MGMT_TABLE_CONNS,
  TSDB_MGMT_TABLE_SCORES,
  TSDB_MGMT_TABLE_GRANTS,
  TSDB_MGMT_TABLE_VNODES,
  TSDB_MGMT_TABLE_CLUSTER,
  TSDB_MGMT_TABLE_STREAMTABLES,
  TSDB_MGMT_TABLE_TP,
  TSDB_MGMT_TABLE_FUNCTION,
  TSDB_MGMT_TABLE_MAX,
} EShowType;

#define TSDB_ALTER_TABLE_ADD_TAG_COLUMN 1
#define TSDB_ALTER_TABLE_DROP_TAG_COLUMN 2
#define TSDB_ALTER_TABLE_CHANGE_TAG_COLUMN 3
#define TSDB_ALTER_TABLE_UPDATE_TAG_VAL 4

#define TSDB_ALTER_TABLE_ADD_COLUMN 5
#define TSDB_ALTER_TABLE_DROP_COLUMN 6
#define TSDB_ALTER_TABLE_CHANGE_COLUMN 7
#define TSDB_ALTER_TABLE_MODIFY_TAG_COLUMN 8

#define TSDB_FILL_NONE 0
#define TSDB_FILL_NULL 1
#define TSDB_FILL_SET_VALUE 2
#define TSDB_FILL_LINEAR 3
#define TSDB_FILL_PREV 4
#define TSDB_FILL_NEXT 5

#define TSDB_ALTER_USER_PASSWD 0x1
#define TSDB_ALTER_USER_PRIVILEGES 0x2

#define TSDB_KILL_MSG_LEN 30

#define TSDB_VN_READ_ACCCESS ((char)0x1)
#define TSDB_VN_WRITE_ACCCESS ((char)0x2)
#define TSDB_VN_ALL_ACCCESS (TSDB_VN_READ_ACCCESS | TSDB_VN_WRITE_ACCCESS)

#define TSDB_COL_NORMAL 0x0u  // the normal column of the table
#define TSDB_COL_TAG 0x1u     // the tag column type
#define TSDB_COL_UDC 0x2u     // the user specified normal string column, it is a dummy column
#define TSDB_COL_TMP 0x4u     // internal column generated by the previous operators
#define TSDB_COL_NULL 0x8u    // the column filter NULL or not

#define TSDB_COL_IS_TAG(f) (((f & (~(TSDB_COL_NULL))) & TSDB_COL_TAG) != 0)
#define TSDB_COL_IS_NORMAL_COL(f) ((f & (~(TSDB_COL_NULL))) == TSDB_COL_NORMAL)
#define TSDB_COL_IS_UD_COL(f) ((f & (~(TSDB_COL_NULL))) == TSDB_COL_UDC)
#define TSDB_COL_REQ_NULL(f) (((f)&TSDB_COL_NULL) != 0)

typedef struct {
  int32_t keyLen;
  int32_t valueLen;
  void*   key;
  void*   value;
} SKv;

typedef struct {
  int32_t connId;
  int32_t hbType;
} SClientHbKey;

typedef struct {
  SClientHbKey connKey;
  SHashObj*    info;  // hash<Skv.key, Skv>
} SClientHbReq;

typedef struct {
  int64_t reqId;
  SArray* reqs;  // SArray<SClientHbReq>
} SClientHbBatchReq;

typedef struct {
  SClientHbKey connKey;
  int32_t      status;
  int32_t      bodyLen;
  void*        body;
} SClientHbRsp;

typedef struct {
  int64_t reqId;
  int64_t rspId;
  SArray* rsps;  // SArray<SClientHbRsp>
} SClientHbBatchRsp;

static FORCE_INLINE uint32_t hbKeyHashFunc(const char* key, uint32_t keyLen) {
  return taosIntHash_64(key, keyLen);
}

int   tSerializeSClientHbReq(void** buf, const SClientHbReq* pReq);
void* tDeserializeSClientHbReq(void* buf, SClientHbReq* pReq);

int   tSerializeSClientHbRsp(void** buf, const SClientHbRsp* pRsp);
void* tDeserializeSClientHbRsp(void* buf, SClientHbRsp* pRsp);

static FORCE_INLINE void  tFreeClientHbReq(void *pReq) {
  SClientHbReq* req = (SClientHbReq*)pReq;
  if (req->info) taosHashCleanup(req->info);
}

int   tSerializeSClientHbBatchReq(void** buf, const SClientHbBatchReq* pReq);
void* tDeserializeSClientHbBatchReq(void* buf, SClientHbBatchReq* pReq);

static FORCE_INLINE void tFreeClientHbBatchReq(void* pReq, bool deep) {
  SClientHbBatchReq *req = (SClientHbBatchReq*)pReq;
  if (deep) {
    taosArrayDestroyEx(req->reqs, tFreeClientHbReq);
  } else {
    taosArrayDestroy(req->reqs);
  }
  free(pReq);
}

int   tSerializeSClientHbBatchRsp(void** buf, const SClientHbBatchRsp* pBatchRsp);
void* tDeserializeSClientHbBatchRsp(void* buf, SClientHbBatchRsp* pBatchRsp);

static FORCE_INLINE int taosEncodeSKv(void** buf, const SKv* pKv) {
  int tlen = 0;
  tlen += taosEncodeFixedI32(buf, pKv->keyLen);
  tlen += taosEncodeFixedI32(buf, pKv->valueLen);
  tlen += taosEncodeBinary(buf, pKv->key, pKv->keyLen);
  tlen += taosEncodeBinary(buf, pKv->value, pKv->valueLen);
  return tlen;
}

static FORCE_INLINE void* taosDecodeSKv(void* buf, SKv* pKv) {
  buf = taosDecodeFixedI32(buf, &pKv->keyLen);
  buf = taosDecodeFixedI32(buf, &pKv->valueLen);
  buf = taosDecodeBinary(buf, &pKv->key, pKv->keyLen);
  buf = taosDecodeBinary(buf, &pKv->value, pKv->valueLen);
  return buf;
}

static FORCE_INLINE int taosEncodeSClientHbKey(void** buf, const SClientHbKey* pKey) {
  int tlen = 0;
  tlen += taosEncodeFixedI32(buf, pKey->connId);
  tlen += taosEncodeFixedI32(buf, pKey->hbType);
  return tlen;
}

static FORCE_INLINE void* taosDecodeSClientHbKey(void* buf, SClientHbKey* pKey) {
  buf = taosDecodeFixedI32(buf, &pKey->connId);
  buf = taosDecodeFixedI32(buf, &pKey->hbType);
  return buf;
}

typedef struct SMqHbVgInfo {
  int32_t vgId;
} SMqHbVgInfo;

static FORCE_INLINE int taosEncodeSMqVgInfo(void** buf, const SMqHbVgInfo* pVgInfo) {
  int tlen = 0;
  tlen += taosEncodeFixedI32(buf, pVgInfo->vgId);
  return tlen;
}

static FORCE_INLINE void* taosDecodeSMqVgInfo(void* buf, SMqHbVgInfo* pVgInfo) {
  buf = taosDecodeFixedI32(buf, &pVgInfo->vgId);
  return buf;
}

typedef struct SMqHbTopicInfo {
  int32_t epoch;
  int64_t topicUid;
  char    name[TSDB_TOPIC_FNAME_LEN];
  SArray* pVgInfo;
} SMqHbTopicInfo;

static FORCE_INLINE int taosEncodeSMqHbTopicInfoMsg(void** buf, const SMqHbTopicInfo* pTopicInfo) {
  int tlen = 0;
  tlen += taosEncodeFixedI32(buf, pTopicInfo->epoch);
  tlen += taosEncodeFixedI64(buf, pTopicInfo->topicUid);
  tlen += taosEncodeString(buf, pTopicInfo->name);
  int32_t sz = taosArrayGetSize(pTopicInfo->pVgInfo);
  tlen += taosEncodeFixedI32(buf, sz);
  for (int32_t i = 0; i < sz; i++) {
    SMqHbVgInfo* pVgInfo = (SMqHbVgInfo*)taosArrayGet(pTopicInfo->pVgInfo, i);
    tlen += taosEncodeSMqVgInfo(buf, pVgInfo);
  }
  return tlen;
}

static FORCE_INLINE void* taosDecodeSMqHbTopicInfoMsg(void* buf, SMqHbTopicInfo* pTopicInfo) {
  buf = taosDecodeFixedI32(buf, &pTopicInfo->epoch);
  buf = taosDecodeFixedI64(buf, &pTopicInfo->topicUid);
  buf = taosDecodeStringTo(buf, pTopicInfo->name);
  int32_t sz;
  buf = taosDecodeFixedI32(buf, &sz);
  pTopicInfo->pVgInfo = taosArrayInit(sz, sizeof(SMqHbVgInfo));
  for (int32_t i = 0; i < sz; i++) {
    SMqHbVgInfo vgInfo;
    buf = taosDecodeSMqVgInfo(buf, &vgInfo);
    taosArrayPush(pTopicInfo->pVgInfo, &vgInfo);
  }
  return buf;
}

typedef struct SMqHbMsg {
  int32_t  status;   // ask hb endpoint
  int32_t  epoch;
  int64_t  consumerId;
  SArray*  pTopics;  // SArray<SMqHbTopicInfo>
} SMqHbMsg;

static FORCE_INLINE int taosEncodeSMqMsg(void** buf, const SMqHbMsg* pMsg) {
  int tlen = 0;
  tlen += taosEncodeFixedI32(buf, pMsg->status);
  tlen += taosEncodeFixedI32(buf, pMsg->epoch);
  tlen += taosEncodeFixedI64(buf, pMsg->consumerId);
  int32_t sz = taosArrayGetSize(pMsg->pTopics);
  tlen += taosEncodeFixedI32(buf, sz);
  for (int i = 0; i < sz; i++) {
    SMqHbTopicInfo* topicInfo = (SMqHbTopicInfo*)taosArrayGet(pMsg->pTopics, i);
    tlen += taosEncodeSMqHbTopicInfoMsg(buf, topicInfo);
  }
  return tlen;
}

static FORCE_INLINE void* taosDecodeSMqMsg(void* buf, SMqHbMsg* pMsg) {
  buf = taosDecodeFixedI32(buf, &pMsg->status);
  buf = taosDecodeFixedI32(buf, &pMsg->epoch);
  buf = taosDecodeFixedI64(buf, &pMsg->consumerId);
  int32_t sz;
  buf = taosDecodeFixedI32(buf, &sz);
  pMsg->pTopics = taosArrayInit(sz, sizeof(SMqHbTopicInfo));
  for (int i = 0; i < sz; i++) {
    SMqHbTopicInfo topicInfo;
    buf = taosDecodeSMqHbTopicInfoMsg(buf, &topicInfo);
    taosArrayPush(pMsg->pTopics, &topicInfo);
  }
  return buf;
}

typedef struct {
  int32_t vgId;
  char*   dbName;
  char*   tableFullName;
} SBuildTableMetaInput;

typedef struct {
  char    db[TSDB_TABLE_FNAME_LEN];
  int32_t vgVersion;
} SBuildUseDBInput;

#pragma pack(push, 1)

// null-terminated string instead of char array to avoid too many memory consumption in case of more than 1M tableMeta
typedef struct {
  char     fqdn[TSDB_FQDN_LEN];
  uint16_t port;
} SEpAddr;

typedef struct {
  int32_t contLen;
  int32_t vgId;
} SMsgHead;

// Submit message for one table
typedef struct SSubmitBlk {
  uint64_t uid;        // table unique id
  int32_t  tid;        // table id
  int32_t  padding;    // TODO just for padding here
  int32_t  sversion;   // data schema version
  int32_t  dataLen;    // data part length, not including the SSubmitBlk head
  int32_t  schemaLen;  // schema length, if length is 0, no schema exists
  int16_t  numOfRows;  // total number of rows in current submit block
  char     data[];
} SSubmitBlk;

// Submit message for this TSDB
typedef struct {
  SMsgHead header;
  int64_t  version;
  int32_t  length;
  int32_t  numOfBlocks;
  char     blocks[];
} SSubmitMsg;

typedef struct {
  int32_t totalLen;
  int32_t len;
  SMemRow row;
} SSubmitBlkIter;

typedef struct {
  int32_t totalLen;
  int32_t len;
  void*   pMsg;
} SSubmitMsgIter;

int     tInitSubmitMsgIter(SSubmitMsg* pMsg, SSubmitMsgIter* pIter);
int     tGetSubmitMsgNext(SSubmitMsgIter* pIter, SSubmitBlk** pPBlock);
int     tInitSubmitBlkIter(SSubmitBlk* pBlock, SSubmitBlkIter* pIter);
SMemRow tGetSubmitBlkNext(SSubmitBlkIter* pIter);

typedef struct {
  int32_t index;  // index of failed block in submit blocks
  int32_t vnode;  // vnode index of failed block
  int32_t sid;    // table index of failed block
  int32_t code;   // errorcode while write data to vnode, such as not created, dropped, no space, invalid table
} SShellSubmitRspBlock;

typedef struct {
  int32_t              code;          // 0-success, > 0 error code
  int32_t              numOfRows;     // number of records the client is trying to write
  int32_t              affectedRows;  // number of records actually written
  int32_t              failedRows;    // number of failed records (exclude duplicate records)
  int32_t              numOfFailedBlocks;
  SShellSubmitRspBlock failedBlocks[];
} SShellSubmitRsp;

typedef struct SSchema {
  int8_t  type;
  int32_t colId;
  int32_t bytes;
  char    name[TSDB_COL_NAME_LEN];
} SSchema;

typedef struct {
  char    name[TSDB_TABLE_FNAME_LEN];
  int8_t  igExists;
  int32_t numOfTags;
  int32_t numOfColumns;
  SSchema pSchema[];
} SMCreateStbReq;

typedef struct {
  char   name[TSDB_TABLE_FNAME_LEN];
  int8_t igNotExists;
} SMDropStbReq;

typedef struct {
  char    name[TSDB_TABLE_FNAME_LEN];
  int8_t  alterType;
  SSchema schema;
} SMAlterStbReq;

typedef struct {
  int32_t pid;
  char    app[TSDB_APP_NAME_LEN];
  char    db[TSDB_DB_NAME_LEN];
  int64_t startTime;
} SConnectReq;

typedef struct SEpSet {
  int8_t   inUse;
  int8_t   numOfEps;
  uint16_t port[TSDB_MAX_REPLICA];
  char     fqdn[TSDB_MAX_REPLICA][TSDB_FQDN_LEN];
} SEpSet;

static FORCE_INLINE int taosEncodeSEpSet(void** buf, const SEpSet* pEp) {
  int tlen = 0;
  tlen += taosEncodeFixedI8(buf, pEp->inUse);
  tlen += taosEncodeFixedI8(buf, pEp->numOfEps);
  for (int i = 0; i < TSDB_MAX_REPLICA; i++) {
    tlen += taosEncodeFixedU16(buf, pEp->port[i]);
    tlen += taosEncodeString(buf, pEp->fqdn[i]);
  }
  return tlen;
}

static FORCE_INLINE void* taosDecodeSEpSet(void* buf, SEpSet* pEp) {
  buf = taosDecodeFixedI8(buf, &pEp->inUse);
  buf = taosDecodeFixedI8(buf, &pEp->numOfEps);
  for (int i = 0; i < TSDB_MAX_REPLICA; i++) {
    buf = taosDecodeFixedU16(buf, &pEp->port[i]);
    buf = taosDecodeStringTo(buf, pEp->fqdn[i]);
  }
  return buf;
}

typedef struct SMqHbRsp {
  int8_t status;    //idle or not
  int8_t vnodeChanged;
  int8_t epChanged; // should use new epset
  int8_t reserved;
  SEpSet epSet;
} SMqHbRsp;

static FORCE_INLINE int taosEncodeSMqHbRsp(void** buf, const SMqHbRsp* pRsp) {
  int tlen = 0;
  tlen += taosEncodeFixedI8(buf, pRsp->status);
  tlen += taosEncodeFixedI8(buf, pRsp->vnodeChanged);
  tlen += taosEncodeFixedI8(buf, pRsp->epChanged);
  tlen += taosEncodeSEpSet(buf, &pRsp->epSet);
  return tlen;
}

static FORCE_INLINE void* taosDecodeSMqHbRsp(void* buf, SMqHbRsp* pRsp) {
  buf = taosDecodeFixedI8(buf, &pRsp->status);
  buf = taosDecodeFixedI8(buf, &pRsp->vnodeChanged);
  buf = taosDecodeFixedI8(buf, &pRsp->epChanged);
  buf = taosDecodeSEpSet(buf, &pRsp->epSet);
  return buf;
}

typedef struct SMqHbOneTopicBatchRsp {
  char topicName[TSDB_TOPIC_FNAME_LEN];
  SArray* rsps;  // SArray<SMqHbRsp>
} SMqHbOneTopicBatchRsp;

static FORCE_INLINE int taosEncodeSMqHbOneTopicBatchRsp(void** buf, const SMqHbOneTopicBatchRsp* pBatchRsp) {
  int tlen = 0;
  tlen += taosEncodeString(buf, pBatchRsp->topicName);
  int32_t sz = taosArrayGetSize(pBatchRsp->rsps);
  tlen += taosEncodeFixedI32(buf, sz);
  for (int32_t i = 0; i < sz; i++) {
    SMqHbRsp* pRsp = (SMqHbRsp*)taosArrayGet(pBatchRsp->rsps, i);
    tlen += taosEncodeSMqHbRsp(buf, pRsp);
  }
  return tlen;
}

static FORCE_INLINE void* taosDecodeSMqHbOneTopicBatchRsp(void* buf, SMqHbOneTopicBatchRsp* pBatchRsp) {
  int32_t sz;
  buf = taosDecodeStringTo(buf, pBatchRsp->topicName);
  buf = taosDecodeFixedI32(buf, &sz);
  pBatchRsp->rsps = taosArrayInit(sz, sizeof(SMqHbRsp));
  for (int32_t i = 0; i < sz; i++) {
    SMqHbRsp rsp;
    buf = taosDecodeSMqHbRsp(buf, &rsp);
    buf = taosArrayPush(pBatchRsp->rsps, &rsp);
  }
  return buf;
}

typedef struct SMqHbBatchRsp {
  int64_t consumerId; 
  SArray* batchRsps; // SArray<SMqHbOneTopicBatchRsp>
} SMqHbBatchRsp;

static FORCE_INLINE int taosEncodeSMqHbBatchRsp(void** buf, const SMqHbBatchRsp* pBatchRsp) {
  int tlen = 0;
  tlen += taosEncodeFixedI64(buf, pBatchRsp->consumerId);
  int32_t sz;
  tlen += taosEncodeFixedI32(buf, sz);
  for (int32_t i = 0; i < sz; i++) {
    SMqHbOneTopicBatchRsp* pRsp = (SMqHbOneTopicBatchRsp*) taosArrayGet(pBatchRsp->batchRsps, i);
    tlen += taosEncodeSMqHbOneTopicBatchRsp(buf, pRsp);
  }
  return tlen;
}

static FORCE_INLINE void* taosDecodeSMqHbBatchRsp(void* buf, SMqHbBatchRsp* pBatchRsp) {
  buf = taosDecodeFixedI64(buf, &pBatchRsp->consumerId);
  int32_t sz;
  buf = taosDecodeFixedI32(buf, &sz);
  pBatchRsp->batchRsps = taosArrayInit(sz, sizeof(SMqHbOneTopicBatchRsp));
  for (int32_t i = 0; i < sz; i++) {
    SMqHbOneTopicBatchRsp  rsp;
    buf = taosDecodeSMqHbOneTopicBatchRsp(buf, &rsp);
    buf = taosArrayPush(pBatchRsp->batchRsps, &rsp);
  }
  return buf;
}

typedef struct {
  int32_t acctId;
  int64_t clusterId;
  int32_t connId;
  int8_t  superUser;
  int8_t  align[3];
  SEpSet  epSet;
} SConnectRsp;

typedef struct {
  char    user[TSDB_USER_LEN];
  char    pass[TSDB_PASSWORD_LEN];
  int32_t maxUsers;
  int32_t maxDbs;
  int32_t maxTimeSeries;
  int32_t maxStreams;
  int32_t accessState;  // Configured only by command
  int64_t maxStorage;   // In unit of GB
} SCreateAcctReq, SAlterAcctReq;

typedef struct {
  char user[TSDB_USER_LEN];
} SDropUserReq, SDropAcctReq;

typedef struct {
  int8_t type;
  char   user[TSDB_USER_LEN];
  char   pass[TSDB_PASSWORD_LEN];
  int8_t superUser;  // denote if it is a super user or not
} SCreateUserReq, SAlterUserReq;

typedef struct {
  int16_t colId;     // column id
  int16_t colIndex;  // column index in colList if it is a normal column or index in tagColList if a tag
  int16_t flag;      // denote if it is a tag or a normal column
  char    name[TSDB_DB_FNAME_LEN];
} SColIndex;

typedef struct {
  int16_t lowerRelOptr;
  int16_t upperRelOptr;
  int16_t filterstr;  // denote if current column is char(binary/nchar)

  union {
    struct {
      int64_t lowerBndi;
      int64_t upperBndi;
    };
    struct {
      double lowerBndd;
      double upperBndd;
    };
    struct {
      int64_t pz;
      int64_t len;
    };
  };
} SColumnFilterInfo;

typedef struct {
  int16_t numOfFilters;
  union {
    int64_t            placeholder;
    SColumnFilterInfo* filterInfo;
  };
} SColumnFilterList;
/*
 * for client side struct, we only need the column id, type, bytes are not necessary
 * But for data in vnode side, we need all the following information.
 */
typedef struct {
  int16_t           colId;
  int16_t           type;
  int16_t           bytes;
  SColumnFilterList flist;
} SColumnInfo;

typedef struct {
  uint64_t uid;
  TSKEY    key;  // last accessed ts, for subscription
} STableIdInfo;

typedef struct STimeWindow {
  TSKEY skey;
  TSKEY ekey;
} STimeWindow;

typedef struct {
  int32_t tsOffset;       // offset value in current msg body, NOTE: ts list is compressed
  int32_t tsLen;          // total length of ts comp block
  int32_t tsNumOfBlocks;  // ts comp block numbers
  int32_t tsOrder;        // ts comp block order
} STsBufInfo;

typedef struct {
  int32_t tz;  // query client timezone
  char    intervalUnit;
  char    slidingUnit;
  char    offsetUnit;
  int64_t interval;
  int64_t sliding;
  int64_t offset;
} SInterval;

typedef struct {
  SMsgHead head;
  char     version[TSDB_VERSION_LEN];

  bool stableQuery;        // super table query or not
  bool topBotQuery;        // TODO used bitwise flag
  bool interpQuery;        // interp query or not
  bool groupbyColumn;      // denote if this is a groupby normal column query
  bool hasTagResults;      // if there are tag values in final result or not
  bool timeWindowInterpo;  // if the time window start/end required interpolation
  bool queryBlockDist;     // if query data block distribution
  bool stabledev;          // super table stddev query
  bool tsCompQuery;        // is tscomp query
  bool simpleAgg;
  bool pointInterpQuery;  // point interpolation query
  bool needReverseScan;   // need reverse scan
  bool stateWindow;       // state window flag

  STimeWindow window;
  int32_t     numOfTables;
  int16_t     order;
  int16_t     orderColId;
  int16_t     numOfCols;  // the number of columns will be load from vnode
  SInterval   interval;
  //  SSessionWindow sw;            // session window
  int16_t tagCondLen;      // tag length in current query
  int16_t colCondLen;      // column length in current query
  int16_t numOfGroupCols;  // num of group by columns
  int16_t orderByIdx;
  int16_t orderType;    // used in group by xx order by xxx
  int64_t vgroupLimit;  // limit the number of rows for each table, used in order by + limit in stable projection query.
  int16_t prjOrder;     // global order in super table projection query.
  int64_t limit;
  int64_t offset;
  int32_t queryType;    // denote another query process
  int16_t numOfOutput;  // final output columns numbers
  int16_t fillType;     // interpolate type
  int64_t fillVal;      // default value array list
  int32_t secondStageOutput;
  STsBufInfo  tsBuf;          // tsBuf info
  int32_t     numOfTags;      // number of tags columns involved
  int32_t     sqlstrLen;      // sql query string
  int32_t     prevResultLen;  // previous result length
  int32_t     numOfOperator;
  int32_t     tableScanOperator;  // table scan operator. -1 means no scan operator
  int32_t     udfNum;             // number of udf function
  int32_t     udfContentOffset;
  int32_t     udfContentLen;
  SColumnInfo tableCols[];
} SQueryTableReq;

typedef struct {
  int32_t code;
} SQueryTableRsp;

// todo: the show handle should be replaced with id
typedef struct {
  SMsgHead header;
  union {
    int64_t showId;
    int64_t qhandle;
    int64_t qId;
  };  // query handle
  int8_t free;
} SRetrieveTableReq;

typedef struct {
  int64_t useconds;
  int8_t  completed;  // all results are returned to client
  int8_t  precision;
  int8_t  compressed;
  int32_t compLen;

  int32_t numOfRows;
  char    data[];
} SRetrieveTableRsp;

typedef struct {
  char    db[TSDB_DB_FNAME_LEN];
  int32_t numOfVgroups;
  int32_t cacheBlockSize;  // MB
  int32_t totalBlocks;
  int32_t daysPerFile;
  int32_t daysToKeep0;
  int32_t daysToKeep1;
  int32_t daysToKeep2;
  int32_t minRows;
  int32_t maxRows;
  int32_t commitTime;
  int32_t fsyncPeriod;
  int8_t  walLevel;
  int8_t  precision;  // time resolution
  int8_t  compression;
  int8_t  replications;
  int8_t  quorum;
  int8_t  update;
  int8_t  cacheLastRow;
  int8_t  ignoreExist;
} SCreateDbReq;

typedef struct {
  char    db[TSDB_DB_FNAME_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;
} SAlterDbReq;

typedef struct {
  char   db[TSDB_TABLE_FNAME_LEN];
  int8_t ignoreNotExists;
} SDropDbReq;

typedef struct {
  char    db[TSDB_TABLE_FNAME_LEN];
  int32_t vgVersion;
} SUseDbReq;

typedef struct {
  char db[TSDB_TABLE_FNAME_LEN];
} SSyncDbReq;

typedef struct {
  char db[TSDB_TABLE_FNAME_LEN];
} SCompactDbReq;

typedef struct {
  char    name[TSDB_FUNC_NAME_LEN];
  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    pCont[];
} SCreateFuncReq;

typedef struct {
  char name[TSDB_FUNC_NAME_LEN];
} SDropFuncReq;

typedef struct {
  int32_t numOfFuncs;
  char    pFuncNames[];
} SRetrieveFuncReq;

typedef struct {
  char    name[TSDB_FUNC_NAME_LEN];
  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    pCont[];
} SFuncInfo;

typedef struct {
  int32_t numOfFuncs;
  char    pFuncInfos[];
} SRetrieveFuncRsp;

typedef struct {
  int32_t statusInterval;
  int64_t checkTime;                    // 1970-01-01 00:00:00.000
  char    timezone[TSDB_TIMEZONE_LEN];  // tsTimezone
  char    locale[TSDB_LOCALE_LEN];      // tsLocale
  char    charset[TSDB_LOCALE_LEN];     // tsCharset
} SClusterCfg;

typedef struct {
  int32_t vgId;
  int8_t  role;
  int8_t  align[3];
  int64_t totalStorage;
  int64_t compStorage;
  int64_t pointsWritten;
  int64_t tablesNum;
} SVnodeLoad;

typedef struct {
  int32_t    num;
  SVnodeLoad data[];
} SVnodeLoads;

typedef struct {
  int32_t     sver;
  int32_t     dnodeId;
  int64_t     clusterId;
  int64_t     dver;
  int64_t     rebootTime;
  int64_t     updateTime;
  int32_t     numOfCores;
  int32_t     numOfSupportVnodes;
  char        dnodeEp[TSDB_EP_LEN];
  SClusterCfg clusterCfg;
  SVnodeLoads vnodeLoads;
} SStatusReq;

typedef struct {
  int32_t reserved;
} STransReq;

typedef struct {
  int32_t dnodeId;
  int64_t clusterId;
} SDnodeCfg;

typedef struct {
  int32_t  id;
  int8_t   isMnode;
  int8_t   align;
  uint16_t port;
  char     fqdn[TSDB_FQDN_LEN];
} SDnodeEp;

typedef struct {
  int32_t  num;
  SDnodeEp eps[];
} SDnodeEps;

typedef struct {
  int64_t   dver;
  SDnodeCfg dnodeCfg;
  SDnodeEps dnodeEps;
} SStatusRsp;

typedef struct {
  int32_t  id;
  uint16_t port;                 // node sync Port
  char     fqdn[TSDB_FQDN_LEN];  // node FQDN
} SReplica;

typedef struct {
  int32_t  vgId;
  int32_t  dnodeId;
  char     db[TSDB_DB_FNAME_LEN];
  uint64_t dbUid;
  int32_t  vgVersion;
  int32_t  cacheBlockSize;
  int32_t  totalBlocks;
  int32_t  daysPerFile;
  int32_t  daysToKeep0;
  int32_t  daysToKeep1;
  int32_t  daysToKeep2;
  int32_t  minRows;
  int32_t  maxRows;
  int32_t  commitTime;
  int32_t  fsyncPeriod;
  int8_t   walLevel;
  int8_t   precision;
  int8_t   compression;
  int8_t   quorum;
  int8_t   update;
  int8_t   cacheLastRow;
  int8_t   replica;
  int8_t   selfIndex;
  SReplica replicas[TSDB_MAX_REPLICA];
} SCreateVnodeReq, SAlterVnodeReq;

typedef struct {
  int32_t  vgId;
  int32_t  dnodeId;
  uint64_t dbUid;
  char     db[TSDB_DB_FNAME_LEN];
} SDropVnodeReq, SSyncVnodeReq, SCompactVnodeReq;

typedef struct {
  int32_t vgId;
  int8_t  accessState;
} SAuthVnodeReq;

typedef struct {
  SMsgHead header;
  char     dbFname[TSDB_DB_FNAME_LEN];
  char     tableFname[TSDB_TABLE_FNAME_LEN];
} STableInfoReq;

typedef struct {
  int8_t  metaClone;  // create local clone of the cached table meta
  int32_t numOfVgroups;
  int32_t numOfTables;
  int32_t numOfUdfs;
  char    tableNames[];
} SMultiTableInfoReq;

typedef struct SVgroupInfo {
  int32_t    vgId;
  uint32_t   hashBegin;
  uint32_t   hashEnd;
  int8_t     inUse;
  int8_t     numOfEps;
  SEpAddr epAddr[TSDB_MAX_REPLICA];
} SVgroupInfo;

typedef struct {
  int32_t    vgId;
  int8_t     numOfEps;
  SEpAddr epAddr[TSDB_MAX_REPLICA];
} SVgroupMsg;

typedef struct {
  int32_t    numOfVgroups;
  SVgroupMsg vgroups[];
} SVgroupsInfo;

typedef struct {
  char     tbFname[TSDB_TABLE_FNAME_LEN];  // table full name
  char     stbFname[TSDB_TABLE_FNAME_LEN];
  char     dbFname[TSDB_DB_FNAME_LEN];
  int32_t  numOfTags;
  int32_t  numOfColumns;
  int8_t   precision;
  int8_t   tableType;
  int8_t   update;
  int32_t  sversion;
  int32_t  tversion;
  uint64_t suid;
  uint64_t tuid;
  int32_t  vgId;
  SSchema  pSchema[];
} STableMetaRsp;

typedef struct {
  int32_t numOfTables;
  int32_t numOfVgroup;
  int32_t numOfUdf;
  int32_t contLen;
  int8_t  compressed;  // denote if compressed or not
  int32_t rawLen;      // size before compress
  uint8_t metaClone;   // make meta clone after retrieve meta from mnode
  char    meta[];
} SMultiTableMeta;

typedef struct {
  int32_t dataLen;
  char    name[TSDB_TABLE_FNAME_LEN];
  char*   data;
} STagData;

typedef struct {
  char        db[TSDB_DB_FNAME_LEN];
  int64_t     uid;
  int32_t     vgVersion;
  int32_t     vgNum;
  int8_t      hashMethod;
  SVgroupInfo vgroupInfo[];
} SUseDbRsp;

/*
 * sql: show tables like '%a_%'
 * payload is the query condition, e.g., '%a_%'
 * payloadLen is the length of payload
 */
typedef struct {
  int8_t  type;
  char    db[TSDB_DB_FNAME_LEN];
  int16_t payloadLen;
  char    payload[];
} SShowReq;

typedef struct {
  char    db[TSDB_DB_FNAME_LEN];
  int32_t numOfVgroup;
  int32_t vgid[];
} SCompactReq;

typedef struct {
  int64_t       showId;
  STableMetaRsp tableMeta;
} SShowRsp;

typedef struct {
  char    fqdn[TSDB_FQDN_LEN];  // end point, hostname:port
  int32_t port;
} SCreateDnodeReq;

typedef struct {
  int32_t dnodeId;
} SDropDnodeReq;

typedef struct {
  int32_t dnodeId;
  char    config[TSDB_DNODE_CONFIG_LEN];
} SMCfgDnodeReq, SDCfgDnodeReq;

typedef struct {
  int32_t dnodeId;
} SMCreateMnodeReq, SMDropMnodeReq, SDDropMnodeReq;

typedef struct {
  int32_t  dnodeId;
  int8_t   replica;
  SReplica replicas[TSDB_MAX_REPLICA];
} SDCreateMnodeReq, SDAlterMnodeReq;

typedef struct {
  int32_t dnodeId;
} SMCreateQnodeReq, SMDropQnodeReq, SDCreateQnodeReq, SDDropQnodeReq;

typedef struct {
  int32_t dnodeId;
} SMCreateSnodeReq, SMDropSnodeReq, SDCreateSnodeReq, SDDropSnodeReq;

typedef struct {
  int32_t dnodeId;
} SMCreateBnodeReq, SMDropBnodeReq, SDCreateBnodeReq, SDDropBnodeReq;

typedef struct {
  char    sql[TSDB_SHOW_SQL_LEN];
  int32_t queryId;
  int64_t useconds;
  int64_t stime;
  int64_t qId;
  int64_t sqlObjId;
  int32_t pid;
  char    fqdn[TSDB_FQDN_LEN];
  int8_t  stableQuery;
  int32_t numOfSub;
  char    subSqlInfo[TSDB_SHOW_SUBQUERY_LEN];  // include subqueries' index, Obj IDs and states(C-complete/I-imcomplete)
} SQueryDesc;

typedef struct {
  int32_t connId;
  int32_t pid;
  int32_t numOfQueries;
  int32_t numOfStreams;
  char    app[TSDB_APP_NAME_LEN];
  char    pData[];
} SHeartBeatReq;

typedef struct {
  int32_t connId;
  int32_t queryId;
  int32_t streamId;
  int32_t totalDnodes;
  int32_t onlineDnodes;
  int8_t  killConnection;
  int8_t  align[3];
  SEpSet  epSet;
} SHeartBeatRsp;

typedef struct {
  int32_t connId;
  int32_t queryId;
} SKillQueryReq;

typedef struct {
  int32_t connId;
} SKillConnReq;

typedef struct {
  char user[TSDB_USER_LEN];
  char spi;
  char encrypt;
  char secret[TSDB_PASSWORD_LEN];
  char ckey[TSDB_PASSWORD_LEN];
} SAuthReq, SAuthRsp;

typedef struct {
  int8_t finished;
  int8_t align[7];
  char   name[TSDB_STEP_NAME_LEN];
  char   desc[TSDB_STEP_DESC_LEN];
} SStartupReq;

// mq related
typedef struct {
} SMqConnectReq;

typedef struct {
} SMqConnectRsp;

typedef struct {
} SMqDisconnectReq;

typedef struct {
} SMqDisconnectRsp;

typedef struct {
} SMqAckReq;

typedef struct {
} SMqAckRsp;

typedef struct {
} SMqResetReq;

typedef struct {
} SMqResetRsp;
// mq related end

typedef struct {
  /* data */
} SSubmitReq;

typedef struct {
  /* data */
} SSubmitRsp;

typedef struct {
  /* data */
} SSubmitReqReader;

typedef struct {
  SMsgHead header;
  uint64_t sId;
  uint64_t queryId;
  uint64_t taskId;
  uint32_t contentLen;
  char     msg[];
} SSubQueryMsg;

typedef struct {
  SMsgHead header;
  uint64_t sId;
  uint64_t queryId;
  uint64_t taskId;
} SSinkDataReq;

typedef struct {
  SMsgHead header;
  uint64_t sId;
  uint64_t queryId;
  uint64_t taskId;
} SQueryContinueReq;


typedef struct {
  SMsgHead header;
  uint64_t sId;
  uint64_t queryId;
  uint64_t taskId;
} SResReadyReq;

typedef struct {
  int32_t code;
} SResReadyRsp;

typedef struct {
  SMsgHead header;
  uint64_t sId;
  uint64_t queryId;
  uint64_t taskId;
} SResFetchReq;

typedef struct {
  SMsgHead header;
  uint64_t sId;
} SSchTasksStatusReq;

typedef struct {
  uint64_t queryId;
  uint64_t taskId;
  int8_t   status;
} STaskStatus;

typedef struct {
  uint32_t    num;
  STaskStatus status[];
} SSchedulerStatusRsp;

typedef struct {
  SMsgHead header;
  uint64_t sId;
  uint64_t queryId;
  uint64_t taskId;
} STaskCancelReq;

typedef struct {
  int32_t code;
} STaskCancelRsp;

typedef struct {
  SMsgHead header;
  uint64_t sId;
  uint64_t queryId;
  uint64_t taskId;
} STaskDropReq;

typedef struct {
  int32_t code;
} STaskDropRsp;

typedef struct {
  int8_t igExists;
  char*  name;
  char*  sql;
  char*  physicalPlan;
  char*  logicalPlan;
} SCMCreateTopicReq;

static FORCE_INLINE int tSerializeSCMCreateTopicReq(void** buf, const SCMCreateTopicReq* pReq) {
  int tlen = 0;
  tlen += taosEncodeFixedI8(buf, pReq->igExists);
  tlen += taosEncodeString(buf, pReq->name);
  tlen += taosEncodeString(buf, pReq->sql);
  tlen += taosEncodeString(buf, pReq->physicalPlan);
  tlen += taosEncodeString(buf, pReq->logicalPlan);
  return tlen;
}

static FORCE_INLINE void* tDeserializeSCMCreateTopicReq(void* buf, SCMCreateTopicReq* pReq) {
  buf = taosDecodeFixedI8(buf, &(pReq->igExists));
  buf = taosDecodeString(buf, &(pReq->name));
  buf = taosDecodeString(buf, &(pReq->sql));
  buf = taosDecodeString(buf, &(pReq->physicalPlan));
  buf = taosDecodeString(buf, &(pReq->logicalPlan));
  return buf;
}

typedef struct {
  int64_t topicId;
} SCMCreateTopicRsp;

static FORCE_INLINE int tSerializeSCMCreateTopicRsp(void** buf, const SCMCreateTopicRsp* pRsp) {
  int tlen = 0;
  tlen += taosEncodeFixedI64(buf, pRsp->topicId);
  return tlen;
}

static FORCE_INLINE void* tDeserializeSCMCreateTopicRsp(void* buf, SCMCreateTopicRsp* pRsp) {
  buf = taosDecodeFixedI64(buf, &pRsp->topicId);
  return buf;
}

typedef struct {
  int32_t topicNum;
  int64_t consumerId;
  char*   consumerGroup;
  SArray* topicNames;  // SArray<char*>
} SCMSubscribeReq;

static FORCE_INLINE int tSerializeSCMSubscribeReq(void** buf, const SCMSubscribeReq* pReq) {
  int tlen = 0;
  tlen += taosEncodeFixedI32(buf, pReq->topicNum);
  tlen += taosEncodeFixedI64(buf, pReq->consumerId);
  tlen += taosEncodeString(buf, pReq->consumerGroup);

  for (int i = 0; i < pReq->topicNum; i++) {
    tlen += taosEncodeString(buf, (char*)taosArrayGetP(pReq->topicNames, i));
  }
  return tlen;
}

static FORCE_INLINE void* tDeserializeSCMSubscribeReq(void* buf, SCMSubscribeReq* pReq) {
  buf = taosDecodeFixedI32(buf, &pReq->topicNum);
  buf = taosDecodeFixedI64(buf, &pReq->consumerId);
  buf = taosDecodeString(buf, &pReq->consumerGroup);
  pReq->topicNames = taosArrayInit(pReq->topicNum, sizeof(void*));
  for (int i = 0; i < pReq->topicNum; i++) {
    char* name = NULL;
    buf = taosDecodeString(buf, &name);
    taosArrayPush(pReq->topicNames, &name);
  }
  return buf;
}

typedef struct SMqSubTopic {
  int32_t vgId;
  int64_t topicId;
  SEpSet  epSet;
} SMqSubTopic;

typedef struct {
  int32_t     topicNum;
  SMqSubTopic topics[];
} SCMSubscribeRsp;

static FORCE_INLINE int tSerializeSCMSubscribeRsp(void** buf, const SCMSubscribeRsp* pRsp) {
  int tlen = 0;
  tlen += taosEncodeFixedI32(buf, pRsp->topicNum);
  for (int i = 0; i < pRsp->topicNum; i++) {
    tlen += taosEncodeFixedI32(buf, pRsp->topics[i].vgId);
    tlen += taosEncodeFixedI64(buf, pRsp->topics[i].topicId);
    tlen += taosEncodeSEpSet(buf, &pRsp->topics[i].epSet);
  }
  return tlen;
}

static FORCE_INLINE void* tDeserializeSCMSubscribeRsp(void* buf, SCMSubscribeRsp* pRsp) {
  buf = taosDecodeFixedI32(buf, &pRsp->topicNum);
  for (int i = 0; i < pRsp->topicNum; i++) {
    buf = taosDecodeFixedI32(buf, &pRsp->topics[i].vgId);
    buf = taosDecodeFixedI64(buf, &pRsp->topics[i].topicId);
    buf = taosDecodeSEpSet(buf, &pRsp->topics[i].epSet);
  }
  return buf;
}

typedef struct {
  int64_t topicId;
  int64_t consumerId;
  int64_t consumerGroupId;
  int64_t offset;
  char*   sql;
  char*   logicalPlan;
  char*   physicalPlan;
} SMVSubscribeReq;

static FORCE_INLINE int tSerializeSMVSubscribeReq(void** buf, SMVSubscribeReq* pReq) {
  int tlen = 0;
  tlen += taosEncodeFixedI64(buf, pReq->topicId);
  tlen += taosEncodeFixedI64(buf, pReq->consumerId);
  tlen += taosEncodeFixedI64(buf, pReq->consumerGroupId);
  tlen += taosEncodeFixedI64(buf, pReq->offset);
  tlen += taosEncodeString(buf, pReq->sql);
  tlen += taosEncodeString(buf, pReq->logicalPlan);
  tlen += taosEncodeString(buf, pReq->physicalPlan);
  return tlen;
}

static FORCE_INLINE void* tDeserializeSMVSubscribeReq(void* buf, SMVSubscribeReq* pReq) {
  buf = taosDecodeFixedI64(buf, &pReq->topicId);
  buf = taosDecodeFixedI64(buf, &pReq->consumerId);
  buf = taosDecodeFixedI64(buf, &pReq->consumerGroupId);
  buf = taosDecodeFixedI64(buf, &pReq->offset);
  buf = taosDecodeString(buf, &pReq->sql);
  buf = taosDecodeString(buf, &pReq->logicalPlan);
  buf = taosDecodeString(buf, &pReq->physicalPlan);
  return buf;
}

typedef struct {
  int64_t status;
} SMVSubscribeRsp;

typedef struct {
  char    name[TSDB_TOPIC_NAME_LEN];
  int8_t  igExists;
  int32_t execLen;
  void*   executor;
  int32_t sqlLen;
  char*   sql;
} SCreateTopicReq;

typedef struct {
  char   name[TSDB_TABLE_FNAME_LEN];
  int8_t igNotExists;
} SDropTopicReq;

typedef struct {
  char    name[TSDB_TABLE_FNAME_LEN];
  int8_t  alterType;
  SSchema schema;
} SAlterTopicReq;

typedef struct {
  SMsgHead head;
  char     name[TSDB_TABLE_FNAME_LEN];
  uint64_t tuid;
  int32_t  sverson;
  int32_t  execLen;
  char*    executor;
  int32_t  sqlLen;
  char*    sql;
} SDCreateTopicReq;

typedef struct {
  SMsgHead head;
  char     name[TSDB_TABLE_FNAME_LEN];
  uint64_t tuid;
} SDDropTopicReq;

typedef struct SVCreateTbReq {
  uint64_t ver;  // use a general definition
  char*    name;
  uint32_t ttl;
  uint32_t keep;
#define TD_SUPER_TABLE TSDB_SUPER_TABLE
#define TD_CHILD_TABLE TSDB_CHILD_TABLE
#define TD_NORMAL_TABLE TSDB_NORMAL_TABLE
  uint8_t type;
  union {
    struct {
      tb_uid_t suid;
      uint32_t nCols;
      SSchema* pSchema;
      uint32_t nTagCols;
      SSchema* pTagSchema;
    } stbCfg;
    struct {
      tb_uid_t suid;
      SKVRow   pTag;
    } ctbCfg;
    struct {
      uint32_t nCols;
      SSchema* pSchema;
    } ntbCfg;
  };
} SVCreateTbReq;

typedef struct {
  uint64_t ver;  // use a general definition
  SArray*  pArray;
} SVCreateTbBatchReq;

int   tSerializeSVCreateTbReq(void** buf, SVCreateTbReq* pReq);
void* tDeserializeSVCreateTbReq(void* buf, SVCreateTbReq* pReq);
int   tSVCreateTbBatchReqSerialize(void** buf, SVCreateTbBatchReq* pReq);
void* tSVCreateTbBatchReqDeserialize(void* buf, SVCreateTbBatchReq* pReq);

typedef struct {
  SMsgHead head;
} SVCreateTbRsp;

typedef struct {
  SMsgHead head;
  char     name[TSDB_TABLE_FNAME_LEN];
  int8_t   ignoreNotExists;
} SVAlterTbReq;

typedef struct {
  SMsgHead head;
} SVAlterTbRsp;

typedef struct {
  SMsgHead head;
  char     name[TSDB_TABLE_FNAME_LEN];
  int64_t  suid;
} SVDropTbReq;

typedef struct {
  SMsgHead head;
} SVDropTbRsp;

typedef struct {
  SMsgHead head;
  int64_t  uid;
  int32_t  tid;
  int16_t  tversion;
  int16_t  colId;
  int8_t   type;
  int16_t  bytes;
  int32_t  tagValLen;
  int16_t  numOfTags;
  int32_t  schemaLen;
  char     data[];
} SUpdateTagValReq;

typedef struct {
  SMsgHead head;
} SUpdateTagValRsp;

typedef struct {
  SMsgHead head;
} SVShowTablesReq;

typedef struct {
  int64_t       id;
  STableMetaRsp metaInfo;
} SVShowTablesRsp;

typedef struct {
  SMsgHead head;
  int32_t  id;
} SVShowTablesFetchReq;

typedef struct {
  int64_t useconds;
  int8_t  completed;  // all results are returned to client
  int8_t  precision;
  int8_t  compressed;
  int32_t compLen;

  int32_t numOfRows;
  char    data[];
} SVShowTablesFetchRsp;

#pragma pack(pop)

#ifdef __cplusplus
}
#endif

#endif /*_TD_COMMON_TAOS_MSG_H_*/