Merge pull request #21070 from taosdata/fix/liaohj_main

enh(query): opt last row read performance. TD-23313

source/client/src/clientTmq.c

@@ -1664,11 +1664,7 @@ static int32_t doTmqPollImpl(tmq_t* pTmq, SMqClientTopic* pTopic, SMqClientVg* p
     return handleErrorBeforePoll(pVg, pTmq);
   }
 
-  sendInfo->msgInfo = (SDataBuf){
-      .pData = msg,
-      .len = msgSize,
-      .handle = NULL,
-  };
+  sendInfo->msgInfo = (SDataBuf){ .pData = msg, .len = msgSize, .handle = NULL };
 
   sendInfo->requestId = req.reqId;
   sendInfo->requestObjRefId = 0;

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

@@ -124,11 +124,7 @@ static void mndCalMqRebalance(SMnode *pMnode) {
   int32_t contLen = 0;
   void   *pReq = mndBuildTimerMsg(&contLen);
   if (pReq != NULL) {
-    SRpcMsg rpcMsg = {
-        .msgType = TDMT_MND_TMQ_TIMER,
-        .pCont = pReq,
-        .contLen = contLen,
-    };
+    SRpcMsg rpcMsg = { .msgType = TDMT_MND_TMQ_TIMER, .pCont = pReq, .contLen = contLen };
     tmsgPutToQueue(&pMnode->msgCb, READ_QUEUE, &rpcMsg);
   }
 }

source/dnode/vnode/inc/vnode.h

@@ -162,7 +162,6 @@ int32_t     metaTbCursorPrev(SMTbCursor *pTbCur, ETableType jumpTableType);
 #endif
 
 // tsdb
-// typedef struct STsdb STsdb;
 typedef struct STsdbReader STsdbReader;
 
 #define TSDB_DEFAULT_STT_FILE  8

source/dnode/vnode/src/inc/tsdb.h

@@ -16,6 +16,7 @@
 #ifndef _TD_VNODE_TSDB_H_
 #define _TD_VNODE_TSDB_H_
 
+#include "tsimplehash.h"
 #include "vnodeInt.h"
 
 #ifdef __cplusplus
@@ -125,11 +126,13 @@ SColVal *tsdbRowIterNext(STSDBRowIter *pIter);
 // SRowMerger
 int32_t tsdbRowMergerInit(SRowMerger *pMerger, STSchema *pResTSchema, TSDBROW *pRow, STSchema *pTSchema);
 int32_t tsdbRowMergerAdd(SRowMerger *pMerger, TSDBROW *pRow, STSchema *pTSchema);
-
-// int32_t tsdbRowMergerInit(SRowMerger *pMerger, TSDBROW *pRow, STSchema *pTSchema);
 void tsdbRowMergerClear(SRowMerger *pMerger);
-// int32_t tsdbRowMerge(SRowMerger *pMerger, TSDBROW *pRow);
 int32_t tsdbRowMergerGetRow(SRowMerger *pMerger, SRow **ppRow);
+
+int32_t tsdbRowMergerInit_rv(SRowMerger* pMerger, STSchema *pSchema);
+void tsdbRowMergerClear_rv(SRowMerger* pMerger);
+void tsdbRowMergerCleanup_rv(SRowMerger* pMerger);
+
 // TABLEID
 int32_t tTABLEIDCmprFn(const void *p1, const void *p2);
 // TSDBKEY
@@ -224,7 +227,7 @@ int32_t tsdbTbDataIterCreate(STbData *pTbData, TSDBKEY *pFrom, int8_t backward,
 void   *tsdbTbDataIterDestroy(STbDataIter *pIter);
 void    tsdbTbDataIterOpen(STbData *pTbData, TSDBKEY *pFrom, int8_t backward, STbDataIter *pIter);
 bool    tsdbTbDataIterNext(STbDataIter *pIter);
-void    tsdbMemTableCountRows(SMemTable *pMemTable, SHashObj *pTableMap, int64_t *rowsNum);
+void    tsdbMemTableCountRows(SMemTable *pMemTable, SSHashObj *pTableMap, int64_t *rowsNum);
 
 // STbData
 int32_t tsdbGetNRowsInTbData(STbData *pTbData);
@@ -706,7 +709,6 @@ typedef struct SSttBlockLoadInfo {
 typedef struct SMergeTree {
   int8_t             backward;
   SRBTree            rbt;
-  SArray            *pIterList;
   SLDataIter        *pIter;
   bool               destroyLoadInfo;
   SSttBlockLoadInfo *pLoadInfo;
@@ -752,13 +754,29 @@ struct SDiskDataBuilder {
   SBlkInfo     bi;
 };
 
+typedef struct SLDataIter {
+  SRBTreeNode        node;
+  SSttBlk           *pSttBlk;
+  SDataFReader      *pReader;
+  int32_t            iStt;
+  int8_t             backward;
+  int32_t            iSttBlk;
+  int32_t            iRow;
+  SRowInfo           rInfo;
+  uint64_t           uid;
+  STimeWindow        timeWindow;
+  SVersionRange      verRange;
+  SSttBlockLoadInfo *pBlockLoadInfo;
+  bool               ignoreEarlierTs;
+} SLDataIter;
+
+#define tMergeTreeGetRow(_t) (&((_t)->pIter->rInfo.row))
 int32_t tMergeTreeOpen(SMergeTree *pMTree, int8_t backward, SDataFReader *pFReader, uint64_t suid, uint64_t uid,
                        STimeWindow *pTimeWindow, SVersionRange *pVerRange, SSttBlockLoadInfo *pBlockLoadInfo,
-                       bool destroyLoadInfo, const char *idStr, bool strictTimeRange);
+                       bool destroyLoadInfo, const char *idStr, bool strictTimeRange, SLDataIter* pLDataIter);
 void    tMergeTreeAddIter(SMergeTree *pMTree, SLDataIter *pIter);
 bool    tMergeTreeNext(SMergeTree *pMTree);
 bool    tMergeTreeIgnoreEarlierTs(SMergeTree *pMTree);
-TSDBROW tMergeTreeGetRow(SMergeTree *pMTree);
 void    tMergeTreeClose(SMergeTree *pMTree);
 
 SSttBlockLoadInfo *tCreateLastBlockLoadInfo(STSchema *pSchema, int16_t *colList, int32_t numOfCols, int32_t numOfStt);
@@ -783,6 +801,7 @@ typedef struct SCacheRowsReader {
   STableKeyInfo     *pTableList;  // table id list
   int32_t            numOfTables;
   SSttBlockLoadInfo *pLoadInfo;
+  SLDataIter        *pDataIter;
   STsdbReadSnap     *pReadSnap;
   SDataFReader      *pDataFReader;
   SDataFReader      *pDataFReaderLast;

source/dnode/vnode/src/tsdb/tsdbCache.c

@@ -598,6 +598,7 @@ typedef struct {
   SMergeTree         mergeTree;
   SMergeTree        *pMergeTree;
   SSttBlockLoadInfo *pLoadInfo;
+  SLDataIter*        pDataIter;
   int64_t            lastTs;
 } SFSLastNextRowIter;
 
@@ -645,7 +646,7 @@ static int32_t getNextRowFromFSLast(void *iter, TSDBROW **ppRow, bool *pIgnoreEa
       }
       tMergeTreeOpen(&state->mergeTree, 1, *state->pDataFReader, state->suid, state->uid,
                      &(STimeWindow){.skey = state->lastTs, .ekey = TSKEY_MAX},
-                     &(SVersionRange){.minVer = 0, .maxVer = UINT64_MAX}, state->pLoadInfo, false, NULL, true);
+                     &(SVersionRange){.minVer = 0, .maxVer = UINT64_MAX}, state->pLoadInfo, false, NULL, true, state->pDataIter);
       state->pMergeTree = &state->mergeTree;
       state->state = SFSLASTNEXTROW_BLOCKROW;
     }
@@ -667,7 +668,7 @@ static int32_t getNextRowFromFSLast(void *iter, TSDBROW **ppRow, bool *pIgnoreEa
         state->state = SFSLASTNEXTROW_FILESET;
         goto _next_fileset;
       }
-      state->row = tMergeTreeGetRow(&state->mergeTree);
+      state->row = *tMergeTreeGetRow(&state->mergeTree);
       *ppRow = &state->row;
 
       if (TSDBROW_TS(&state->row) <= state->lastTs) {
@@ -1211,7 +1212,7 @@ typedef struct {
 } CacheNextRowIter;
 
 static int32_t nextRowIterOpen(CacheNextRowIter *pIter, tb_uid_t uid, STsdb *pTsdb, STSchema *pTSchema, tb_uid_t suid,
-                               SSttBlockLoadInfo *pLoadInfo, STsdbReadSnap *pReadSnap, SDataFReader **pDataFReader,
+                               SSttBlockLoadInfo *pLoadInfo, SLDataIter* pLDataIter, STsdbReadSnap *pReadSnap, SDataFReader **pDataFReader,
                                SDataFReader **pDataFReaderLast, int64_t lastTs) {
   int code = 0;
 
@@ -1274,6 +1275,7 @@ static int32_t nextRowIterOpen(CacheNextRowIter *pIter, tb_uid_t uid, STsdb *pTs
   pIter->fsLastState.pLoadInfo = pLoadInfo;
   pIter->fsLastState.pDataFReader = pDataFReaderLast;
   pIter->fsLastState.lastTs = lastTs;
+  pIter->fsLastState.pDataIter = pLDataIter;
 
   pIter->fsState.state = SFSNEXTROW_FS;
   pIter->fsState.pTsdb = pTsdb;
@@ -1465,7 +1467,7 @@ static int32_t mergeLastRow(tb_uid_t uid, STsdb *pTsdb, bool *dup, SArray **ppCo
   TSKEY lastRowTs = TSKEY_MAX;
 
   CacheNextRowIter iter = {0};
-  nextRowIterOpen(&iter, uid, pTsdb, pTSchema, pr->suid, pr->pLoadInfo, pr->pReadSnap, &pr->pDataFReader,
+  nextRowIterOpen(&iter, uid, pTsdb, pTSchema, pr->suid, pr->pLoadInfo, pr->pDataIter, pr->pReadSnap, &pr->pDataFReader,
                   &pr->pDataFReaderLast, pr->lastTs);
 
   do {
@@ -1622,7 +1624,7 @@ static int32_t mergeLast(tb_uid_t uid, STsdb *pTsdb, SArray **ppLastArray, SCach
   TSKEY lastRowTs = TSKEY_MAX;
 
   CacheNextRowIter iter = {0};
-  nextRowIterOpen(&iter, uid, pTsdb, pTSchema, pr->suid, pr->pLoadInfo, pr->pReadSnap, &pr->pDataFReader,
+  nextRowIterOpen(&iter, uid, pTsdb, pTSchema, pr->suid, pr->pLoadInfo, pr->pDataIter, pr->pReadSnap, &pr->pDataFReader,
                   &pr->pDataFReaderLast, pr->lastTs);
 
   do {

source/dnode/vnode/src/tsdb/tsdbCacheRead.c

@@ -187,13 +187,21 @@ int32_t tsdbCacherowsReaderOpen(void* pVnode, int32_t type, void* pTableIdList,
     }
   }
 
-  int32_t numOfStt = ((SVnode*)pVnode)->config.sttTrigger;
+  SVnodeCfg* pCfg = &((SVnode*)pVnode)->config;
+
+  int32_t numOfStt = pCfg->sttTrigger;
   p->pLoadInfo = tCreateLastBlockLoadInfo(p->pSchema, NULL, 0, numOfStt);
   if (p->pLoadInfo == NULL) {
     tsdbCacherowsReaderClose(p);
     return TSDB_CODE_OUT_OF_MEMORY;
   }
 
+  p->pDataIter = taosMemoryCalloc(pCfg->sttTrigger, sizeof(SLDataIter));
+  if (p->pDataIter == NULL) {
+    tsdbCacherowsReaderClose(p);
+    return TSDB_CODE_OUT_OF_MEMORY;
+  }
+
   p->idstr = taosStrdup(idstr);
   taosThreadMutexInit(&p->readerMutex, NULL);
 
@@ -215,6 +223,7 @@ void* tsdbCacherowsReaderClose(void* pReader) {
     taosMemoryFree(p->pSchema);
   }
 
+  taosMemoryFreeClear(p->pDataIter);
   taosMemoryFree(p->pCurrSchema);
 
   destroyLastBlockLoadInfo(p->pLoadInfo);

source/dnode/vnode/src/tsdb/tsdbMemTable.c

@@ -13,6 +13,7 @@
  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  */
 
+#include <util/tsimplehash.h>
 #include "tsdb.h"
 
 #define MEM_MIN_HASH 1024
@@ -298,12 +299,12 @@ int64_t tsdbCountTbDataRows(STbData *pTbData) {
   return rowsNum;
 }
 
-void tsdbMemTableCountRows(SMemTable *pMemTable, SHashObj*        pTableMap, int64_t *rowsNum) {
+void tsdbMemTableCountRows(SMemTable *pMemTable, SSHashObj* pTableMap, int64_t *rowsNum) {
   taosRLockLatch(&pMemTable->latch);
   for (int32_t i = 0; i < pMemTable->nBucket; ++i) {
     STbData *pTbData = pMemTable->aBucket[i];
     while (pTbData) {
-      void* p = taosHashGet(pTableMap, &pTbData->uid, sizeof(pTbData->uid));
+      void* p = tSimpleHashGet(pTableMap, &pTbData->uid, sizeof(pTbData->uid));
       if (p == NULL) {
         pTbData = pTbData->next;
         continue;

source/dnode/vnode/src/tsdb/tsdbMergeTree.c

@@ -16,22 +16,6 @@
 #include "tsdb.h"
 
 // SLDataIter =================================================
-struct SLDataIter {
-  SRBTreeNode        node;
-  SSttBlk           *pSttBlk;
-  SDataFReader      *pReader;
-  int32_t            iStt;
-  int8_t             backward;
-  int32_t            iSttBlk;
-  int32_t            iRow;
-  SRowInfo           rInfo;
-  uint64_t           uid;
-  STimeWindow        timeWindow;
-  SVersionRange      verRange;
-  SSttBlockLoadInfo *pBlockLoadInfo;
-  bool               ignoreEarlierTs;
-};
-
 SSttBlockLoadInfo *tCreateLastBlockLoadInfo(STSchema *pSchema, int16_t *colList, int32_t numOfCols,
                                             int32_t numOfSttTrigger) {
   SSttBlockLoadInfo *pLoadInfo = taosMemoryCalloc(numOfSttTrigger, sizeof(SSttBlockLoadInfo));
@@ -268,25 +252,21 @@ static int32_t binarySearchForStartRowIndex(uint64_t *uidList, int32_t num, uint
   }
 }
 
-int32_t tLDataIterOpen(struct SLDataIter **pIter, SDataFReader *pReader, int32_t iStt, int8_t backward, uint64_t suid,
+int32_t tLDataIterOpen(struct SLDataIter *pIter, SDataFReader *pReader, int32_t iStt, int8_t backward, uint64_t suid,
                        uint64_t uid, STimeWindow *pTimeWindow, SVersionRange *pRange, SSttBlockLoadInfo *pBlockLoadInfo,
                        const char *idStr, bool strictTimeRange) {
   int32_t code = TSDB_CODE_SUCCESS;
 
-  *pIter = taosMemoryCalloc(1, sizeof(SLDataIter));
-  if (*pIter == NULL) {
-    code = TSDB_CODE_OUT_OF_MEMORY;
-    goto _exit;
-  }
+  pIter->uid = uid;
+  pIter->pReader = pReader;
+  pIter->iStt = iStt;
+  pIter->backward = backward;
+  pIter->verRange.minVer = pRange->minVer;
+  pIter->verRange.maxVer = pRange->maxVer;
+  pIter->timeWindow.skey = pTimeWindow->skey;
+  pIter->timeWindow.ekey = pTimeWindow->ekey;
 
-  (*pIter)->uid = uid;
-  (*pIter)->pReader = pReader;
-  (*pIter)->iStt = iStt;
-  (*pIter)->backward = backward;
-  (*pIter)->verRange = *pRange;
-  (*pIter)->timeWindow = *pTimeWindow;
-
-  (*pIter)->pBlockLoadInfo = pBlockLoadInfo;
+  pIter->pBlockLoadInfo = pBlockLoadInfo;
 
   if (!pBlockLoadInfo->sttBlockLoaded) {
     int64_t st = taosGetTimestampUs();
@@ -294,7 +274,7 @@ int32_t tLDataIterOpen(struct SLDataIter **pIter, SDataFReader *pReader, int32_t
 
     code = tsdbReadSttBlk(pReader, iStt, pBlockLoadInfo->aSttBlk);
     if (code) {
-      goto _exit;
+      return code;
     }
 
     // only apply to the child tables, ordinary tables will not incur this filter procedure.
@@ -310,7 +290,7 @@ int32_t tLDataIterOpen(struct SLDataIter **pIter, SDataFReader *pReader, int32_t
           // no qualified stt block existed
           taosArrayClear(pBlockLoadInfo->aSttBlk);
 
-          (*pIter)->iSttBlk = -1;
+          pIter->iSttBlk = -1;
           double el = (taosGetTimestampUs() - st) / 1000.0;
           tsdbDebug("load the last file info completed, elapsed time:%.2fms, %s", el, idStr);
           return code;
@@ -343,31 +323,27 @@ int32_t tLDataIterOpen(struct SLDataIter **pIter, SDataFReader *pReader, int32_t
   size_t size = taosArrayGetSize(pBlockLoadInfo->aSttBlk);
 
   // find the start block
-  (*pIter)->iSttBlk = binarySearchForStartBlock(pBlockLoadInfo->aSttBlk->pData, size, uid, backward);
-  if ((*pIter)->iSttBlk != -1) {
-    (*pIter)->pSttBlk = taosArrayGet(pBlockLoadInfo->aSttBlk, (*pIter)->iSttBlk);
-    (*pIter)->iRow = ((*pIter)->backward) ? (*pIter)->pSttBlk->nRow : -1;
-
-    if ((!backward) && ((strictTimeRange && (*pIter)->pSttBlk->minKey >= (*pIter)->timeWindow.ekey) ||
-                        (!strictTimeRange && (*pIter)->pSttBlk->minKey > (*pIter)->timeWindow.ekey))) {
-      (*pIter)->pSttBlk = NULL;
+  pIter->iSttBlk = binarySearchForStartBlock(pBlockLoadInfo->aSttBlk->pData, size, uid, backward);
+  if (pIter->iSttBlk != -1) {
+    pIter->pSttBlk = taosArrayGet(pBlockLoadInfo->aSttBlk, pIter->iSttBlk);
+    pIter->iRow = (pIter->backward) ? pIter->pSttBlk->nRow : -1;
+
+    if ((!backward) && ((strictTimeRange && pIter->pSttBlk->minKey >= pIter->timeWindow.ekey) ||
+                        (!strictTimeRange && pIter->pSttBlk->minKey > pIter->timeWindow.ekey))) {
+      pIter->pSttBlk = NULL;
     }
 
-    if (backward && ((strictTimeRange && (*pIter)->pSttBlk->maxKey <= (*pIter)->timeWindow.skey) ||
-                     (!strictTimeRange && (*pIter)->pSttBlk->maxKey < (*pIter)->timeWindow.skey))) {
-      (*pIter)->pSttBlk = NULL;
-      (*pIter)->ignoreEarlierTs = true;
+    if (backward && ((strictTimeRange && pIter->pSttBlk->maxKey <= pIter->timeWindow.skey) ||
+                     (!strictTimeRange && pIter->pSttBlk->maxKey < pIter->timeWindow.skey))) {
+      pIter->pSttBlk = NULL;
+      pIter->ignoreEarlierTs = true;
     }
   }
 
   return code;
-
-_exit:
-  taosMemoryFree(*pIter);
-  return code;
 }
 
-void tLDataIterClose(SLDataIter *pIter) { taosMemoryFree(pIter); }
+void tLDataIterClose(SLDataIter *pIter) { /*taosMemoryFree(pIter); */}
 
 void tLDataIterNextBlock(SLDataIter *pIter, const char *idStr) {
   int32_t step = pIter->backward ? -1 : 1;
@@ -594,43 +570,38 @@ static FORCE_INLINE int32_t tLDataIterDescCmprFn(const SRBTreeNode *p1, const SR
 
 int32_t tMergeTreeOpen(SMergeTree *pMTree, int8_t backward, SDataFReader *pFReader, uint64_t suid, uint64_t uid,
                        STimeWindow *pTimeWindow, SVersionRange *pVerRange, SSttBlockLoadInfo *pBlockLoadInfo,
-                       bool destroyLoadInfo, const char *idStr, bool strictTimeRange) {
+                       bool destroyLoadInfo, const char *idStr, bool strictTimeRange, SLDataIter* pLDataIter) {
+  int32_t code = TSDB_CODE_SUCCESS;
+
   pMTree->backward = backward;
   pMTree->pIter = NULL;
-  pMTree->pIterList = taosArrayInit(4, POINTER_BYTES);
-  if (pMTree->pIterList == NULL) {
-    return TSDB_CODE_OUT_OF_MEMORY;
-  }
-
   pMTree->idStr = idStr;
+
   if (!pMTree->backward) {  // asc
     tRBTreeCreate(&pMTree->rbt, tLDataIterCmprFn);
   } else {  // desc
     tRBTreeCreate(&pMTree->rbt, tLDataIterDescCmprFn);
   }
-  int32_t code = TSDB_CODE_SUCCESS;
 
   pMTree->pLoadInfo = pBlockLoadInfo;
   pMTree->destroyLoadInfo = destroyLoadInfo;
   pMTree->ignoreEarlierTs = false;
 
   for (int32_t i = 0; i < pFReader->pSet->nSttF; ++i) {  // open all last file
-    struct SLDataIter *pIter = NULL;
-    code = tLDataIterOpen(&pIter, pFReader, i, pMTree->backward, suid, uid, pTimeWindow, pVerRange,
+    memset(&pLDataIter[i], 0, sizeof(SLDataIter));
+    code = tLDataIterOpen(&pLDataIter[i], pFReader, i, pMTree->backward, suid, uid, pTimeWindow, pVerRange,
                           &pMTree->pLoadInfo[i], pMTree->idStr, strictTimeRange);
     if (code != TSDB_CODE_SUCCESS) {
       goto _end;
     }
 
-    bool hasVal = tLDataIterNextRow(pIter, pMTree->idStr);
+    bool hasVal = tLDataIterNextRow(&pLDataIter[i], pMTree->idStr);
     if (hasVal) {
-      taosArrayPush(pMTree->pIterList, &pIter);
-      tMergeTreeAddIter(pMTree, pIter);
+      tMergeTreeAddIter(pMTree, &pLDataIter[i]);
     } else {
       if (!pMTree->ignoreEarlierTs) {
-        pMTree->ignoreEarlierTs = pIter->ignoreEarlierTs;
+        pMTree->ignoreEarlierTs = pLDataIter[i].ignoreEarlierTs;
       }
-      tLDataIterClose(pIter);
     }
   }
 
@@ -678,18 +649,8 @@ bool tMergeTreeNext(SMergeTree *pMTree) {
   return pMTree->pIter != NULL;
 }
 
-TSDBROW tMergeTreeGetRow(SMergeTree *pMTree) { return pMTree->pIter->rInfo.row; }
-
 void tMergeTreeClose(SMergeTree *pMTree) {
-  size_t size = taosArrayGetSize(pMTree->pIterList);
-  for (int32_t i = 0; i < size; ++i) {
-    SLDataIter *pIter = taosArrayGetP(pMTree->pIterList, i);
-    tLDataIterClose(pIter);
-  }
-
-  pMTree->pIterList = taosArrayDestroy(pMTree->pIterList);
   pMTree->pIter = NULL;
-
   if (pMTree->destroyLoadInfo) {
     pMTree->pLoadInfo = destroyLastBlockLoadInfo(pMTree->pLoadInfo);
     pMTree->destroyLoadInfo = false;

source/dnode/vnode/src/tsdb/tsdbUtil.c

@@ -712,124 +712,163 @@ _exit:
 int32_t tsdbRowMergerAdd(SRowMerger *pMerger, TSDBROW *pRow, STSchema *pTSchema) {
   int32_t   code = 0;
   TSDBKEY   key = TSDBROW_KEY(pRow);
-  SColVal  *pColVal = &(SColVal){0};
+  SColVal * pColVal = &(SColVal){0};
   STColumn *pTColumn;
   int32_t   iCol, jCol = 1;
 
   if (NULL == pTSchema) {
     pTSchema = pMerger->pTSchema;
   }
-  ASSERT(((SColVal *)pMerger->pArray->pData)->value.val == key.ts);
 
-  for (iCol = 1; iCol < pMerger->pTSchema->numOfCols && jCol < pTSchema->numOfCols; ++iCol) {
-    pTColumn = &pMerger->pTSchema->columns[iCol];
-    if (pTSchema->columns[jCol].colId < pTColumn->colId) {
-      ++jCol;
-      --iCol;
-      continue;
-    } else if (pTSchema->columns[jCol].colId > pTColumn->colId) {
-      continue;
+  if (taosArrayGetSize(pMerger->pArray) == 0) {
+    // ts
+    jCol = 0;
+    pTColumn = &pTSchema->columns[jCol++];
+
+    ASSERT(pTColumn->type == TSDB_DATA_TYPE_TIMESTAMP);
+
+    *pColVal = COL_VAL_VALUE(pTColumn->colId, pTColumn->type, (SValue){.val = key.ts});
+    if (taosArrayPush(pMerger->pArray, pColVal) == NULL) {
+      code = TSDB_CODE_OUT_OF_MEMORY;
+      return code;
+      //      goto _exit;
     }
 
-    tsdbRowGetColVal(pRow, pTSchema, jCol++, pColVal);
+    // other
+    for (iCol = 1; jCol < pTSchema->numOfCols && iCol < pMerger->pTSchema->numOfCols; ++iCol) {
+      pTColumn = &pMerger->pTSchema->columns[iCol];
+      if (pTSchema->columns[jCol].colId < pTColumn->colId) {
+        ++jCol;
+        --iCol;
+        continue;
+      } else if (pTSchema->columns[jCol].colId > pTColumn->colId) {
+        taosArrayPush(pMerger->pArray, &COL_VAL_NONE(pTColumn->colId, pTColumn->type));
+        continue;
+      }
 
-    if (key.version > pMerger->version) {
-      if (!COL_VAL_IS_NONE(pColVal)) {
-        if (IS_VAR_DATA_TYPE(pColVal->type)) {
-          SColVal *pTColVal = taosArrayGet(pMerger->pArray, iCol);
-          if (!COL_VAL_IS_NULL(pColVal)) {
-            code = tRealloc(&pTColVal->value.pData, pColVal->value.nData);
-            if (code) return code;
+      tsdbRowGetColVal(pRow, pTSchema, jCol++, pColVal);
+      if ((!COL_VAL_IS_NONE(pColVal)) && (!COL_VAL_IS_NULL(pColVal)) && IS_VAR_DATA_TYPE(pColVal->type)) {
+        uint8_t *pVal = pColVal->value.pData;
 
-            pTColVal->value.nData = pColVal->value.nData;
-            if (pTColVal->value.nData) {
-              memcpy(pTColVal->value.pData, pColVal->value.pData, pTColVal->value.nData);
+        pColVal->value.pData = NULL;
+        code = tRealloc(&pColVal->value.pData, pColVal->value.nData);
+        if (code) {
+          return TSDB_CODE_OUT_OF_MEMORY;
+        }
+
+        if (pColVal->value.nData) {
+          memcpy(pColVal->value.pData, pVal, pColVal->value.nData);
+        }
+      }
+
+      if (taosArrayPush(pMerger->pArray, pColVal) == NULL) {
+        code = TSDB_CODE_OUT_OF_MEMORY;
+        return code;
+      }
+    }
+
+    for (; iCol < pMerger->pTSchema->numOfCols; ++iCol) {
+      pTColumn = &pMerger->pTSchema->columns[iCol];
+      taosArrayPush(pMerger->pArray, &COL_VAL_NONE(pTColumn->colId, pTColumn->type));
+    }
+
+    pMerger->version = key.version;
+    return 0;
+  } else {
+    ASSERT(((SColVal *)pMerger->pArray->pData)->value.val == key.ts);
+
+    for (iCol = 1; iCol < pMerger->pTSchema->numOfCols && jCol < pTSchema->numOfCols; ++iCol) {
+      pTColumn = &pMerger->pTSchema->columns[iCol];
+      if (pTSchema->columns[jCol].colId < pTColumn->colId) {
+        ++jCol;
+        --iCol;
+        continue;
+      } else if (pTSchema->columns[jCol].colId > pTColumn->colId) {
+        continue;
+      }
+
+      tsdbRowGetColVal(pRow, pTSchema, jCol++, pColVal);
+
+      if (key.version > pMerger->version) {
+        if (!COL_VAL_IS_NONE(pColVal)) {
+          if (IS_VAR_DATA_TYPE(pColVal->type)) {
+            SColVal *pTColVal = taosArrayGet(pMerger->pArray, iCol);
+            if (!COL_VAL_IS_NULL(pColVal)) {
+              code = tRealloc(&pTColVal->value.pData, pColVal->value.nData);
+              if (code) return code;
+
+              pTColVal->value.nData = pColVal->value.nData;
+              if (pTColVal->value.nData) {
+                memcpy(pTColVal->value.pData, pColVal->value.pData, pTColVal->value.nData);
+              }
+              pTColVal->flag = 0;
+            } else {
+              tFree(pTColVal->value.pData);
+              taosArraySet(pMerger->pArray, iCol, pColVal);
             }
-            pTColVal->flag = 0;
           } else {
-            tFree(pTColVal->value.pData);
             taosArraySet(pMerger->pArray, iCol, pColVal);
           }
-        } else {
-          taosArraySet(pMerger->pArray, iCol, pColVal);
         }
-      }
-    } else if (key.version < pMerger->version) {
-      SColVal *tColVal = (SColVal *)taosArrayGet(pMerger->pArray, iCol);
-      if (COL_VAL_IS_NONE(tColVal) && !COL_VAL_IS_NONE(pColVal)) {
-        if ((!COL_VAL_IS_NULL(pColVal)) && IS_VAR_DATA_TYPE(pColVal->type)) {
-          code = tRealloc(&tColVal->value.pData, pColVal->value.nData);
-          if (code) return code;
+      } else if (key.version < pMerger->version) {
+        SColVal *tColVal = (SColVal *)taosArrayGet(pMerger->pArray, iCol);
+        if (COL_VAL_IS_NONE(tColVal) && !COL_VAL_IS_NONE(pColVal)) {
+          if ((!COL_VAL_IS_NULL(pColVal)) && IS_VAR_DATA_TYPE(pColVal->type)) {
+            code = tRealloc(&tColVal->value.pData, pColVal->value.nData);
+            if (code) return code;
 
-          tColVal->value.nData = pColVal->value.nData;
-          if (pColVal->value.nData) {
-            memcpy(tColVal->value.pData, pColVal->value.pData, pColVal->value.nData);
+            tColVal->value.nData = pColVal->value.nData;
+            if (pColVal->value.nData) {
+              memcpy(tColVal->value.pData, pColVal->value.pData, pColVal->value.nData);
+            }
+            tColVal->flag = 0;
+          } else {
+            taosArraySet(pMerger->pArray, iCol, pColVal);
           }
-          tColVal->flag = 0;
-        } else {
-          taosArraySet(pMerger->pArray, iCol, pColVal);
         }
+      } else {
+        ASSERT(0 && "dup versions not allowed");
       }
-    } else {
-      ASSERT(0 && "dup versions not allowed");
     }
-  }
 
-  pMerger->version = key.version;
-  return code;
+    pMerger->version = key.version;
+    return code;
+  }
 }
-/*
-int32_t tsdbRowMergerInit(SRowMerger *pMerger, TSDBROW *pRow, STSchema *pTSchema) {
-  int32_t   code = 0;
-  TSDBKEY   key = TSDBROW_KEY(pRow);
-  SColVal  *pColVal = &(SColVal){0};
-  STColumn *pTColumn;
 
-  pMerger->pTSchema = pTSchema;
-  pMerger->version = key.version;
-
-  pMerger->pArray = taosArrayInit(pTSchema->numOfCols, sizeof(SColVal));
+int32_t tsdbRowMergerInit_rv(SRowMerger* pMerger, STSchema *pSchema) {
+  pMerger->pTSchema = pSchema;
+  pMerger->pArray = taosArrayInit(pSchema->numOfCols, sizeof(SColVal));
   if (pMerger->pArray == NULL) {
-    code = TSDB_CODE_OUT_OF_MEMORY;
-    goto _exit;
+    return TSDB_CODE_OUT_OF_MEMORY;
+  } else {
+    return TSDB_CODE_SUCCESS;
   }
+}
 
-  // ts
-  pTColumn = &pTSchema->columns[0];
-
-  ASSERT(pTColumn->type == TSDB_DATA_TYPE_TIMESTAMP);
-
-  *pColVal = COL_VAL_VALUE(pTColumn->colId, pTColumn->type, (SValue){.val = key.ts});
-  if (taosArrayPush(pMerger->pArray, pColVal) == NULL) {
-    code = TSDB_CODE_OUT_OF_MEMORY;
-    goto _exit;
+void tsdbRowMergerClear_rv(SRowMerger* pMerger) {
+  for (int32_t iCol = 1; iCol < pMerger->pTSchema->numOfCols; iCol++) {
+    SColVal *pTColVal = taosArrayGet(pMerger->pArray, iCol);
+    if (IS_VAR_DATA_TYPE(pTColVal->type)) {
+      tFree(pTColVal->value.pData);
+    }
   }
 
-  // other
-  for (int16_t iCol = 1; iCol < pTSchema->numOfCols; iCol++) {
-    tsdbRowGetColVal(pRow, pTSchema, iCol, pColVal);
-    if ((!COL_VAL_IS_NONE(pColVal)) && (!COL_VAL_IS_NULL(pColVal)) && IS_VAR_DATA_TYPE(pColVal->type)) {
-      uint8_t *pVal = pColVal->value.pData;
-
-      pColVal->value.pData = NULL;
-      code = tRealloc(&pColVal->value.pData, pColVal->value.nData);
-      if (code) goto _exit;
-
-      if (pColVal->value.nData) {
-        memcpy(pColVal->value.pData, pVal, pColVal->value.nData);
-      }
-    }
+  taosArrayClear(pMerger->pArray);
+}
 
-    if (taosArrayPush(pMerger->pArray, pColVal) == NULL) {
-      code = TSDB_CODE_OUT_OF_MEMORY;
-      goto _exit;
+void tsdbRowMergerCleanup_rv(SRowMerger* pMerger) {
+  int32_t numOfCols = taosArrayGetSize(pMerger->pArray);
+  for (int32_t iCol = 1; iCol < numOfCols; iCol++) {
+    SColVal *pTColVal = taosArrayGet(pMerger->pArray, iCol);
+    if (IS_VAR_DATA_TYPE(pTColVal->type)) {
+      tFree(pTColVal->value.pData);
     }
   }
 
-_exit:
-  return code;
+  taosArrayDestroy(pMerger->pArray);
 }
-*/
+
 void tsdbRowMergerClear(SRowMerger *pMerger) {
   for (int32_t iCol = 1; iCol < pMerger->pTSchema->numOfCols; iCol++) {
     SColVal *pTColVal = taosArrayGet(pMerger->pArray, iCol);

source/util/src/tsimplehash.c

@@ -361,10 +361,6 @@ int32_t tSimpleHashIterateRemove(SSHashObj *pHashObj, const void *key, size_t ke
   return TSDB_CODE_SUCCESS;
 }
 
-static void destroyItems(void* pItem) {
-  taosMemoryFree(*(void**)pItem);
-}
-
 void tSimpleHashClear(SSHashObj *pHashObj) {
   if (!pHashObj || taosHashTableEmpty(pHashObj)) {
     return;