diff --git a/include/common/tdataformat.h b/include/common/tdataformat.h
index 022036c368ad0adbf7cd4c6a2be9ce0a2cfffd99..314c1525bc7c041f81381c81f4f07a2989793f43 100644
--- a/include/common/tdataformat.h
+++ b/include/common/tdataformat.h
@@ -94,7 +94,7 @@ int32_t tRowMerge(SArray *aRowP, STSchema *pTSchema, int8_t flag);
 int32_t  tRowIterOpen(SRow *pRow, STSchema *pTSchema, SRowIter **ppIter);
 void     tRowIterClose(SRowIter **ppIter);
 SColVal *tRowIterNext(SRowIter *pIter);
-int32_t  tRowAppendToColData(SRow *pRow, STSchema *pTSchema, SArray *aColData, int32_t nColData);
+int32_t  tRowAppendToColData(SRow *pRow, STSchema *pTSchema, SColData *aColData, int32_t nColData);
 
 // STag ================================
 int32_t tTagNew(SArray *pArray, int32_t version, int8_t isJson, STag **ppTag);
diff --git a/include/util/tRealloc.h b/include/util/tRealloc.h
index f3593d5818cd626c7268ec1b721bd961fba3a845..3229c53039f6dc857dd7e0b2d4774e6875ef8c16 100644
--- a/include/util/tRealloc.h
+++ b/include/util/tRealloc.h
@@ -52,11 +52,13 @@ _exit:
   return code;
 }
 
-static FORCE_INLINE void tFree(uint8_t *pBuf) {
-  if (pBuf) {
-    taosMemoryFree(pBuf - sizeof(int64_t));
-  }
-}
+#define tFree(BUF)                                        \
+  do {                                                    \
+    if (BUF) {                                            \
+      taosMemoryFree((uint8_t *)(BUF) - sizeof(int64_t)); \
+      (BUF) = NULL;                                       \
+    }                                                     \
+  } while (0)
 
 #ifdef __cplusplus
 }
diff --git a/source/common/src/tdataformat.c b/source/common/src/tdataformat.c
index 5d1f40532d2610dbb18589858bb553631d5ec692..a4f110582099e7dc24b278268b4434d0388d1f3f 100644
--- a/source/common/src/tdataformat.c
+++ b/source/common/src/tdataformat.c
@@ -841,11 +841,11 @@ _exit:
   return &pIter->cv;
 }
 
-static int32_t tRowAppendNoneToColData(SArray *aColData, int32_t nColData) {
+static int32_t tRowAppendNoneToColData(SColData *aColData, int32_t nColData) {
   int32_t code = 0;
 
   for (int32_t iColData = 0; iColData < nColData; iColData++) {
-    SColData *pColData = taosArrayGet(aColData, iColData);
+    SColData *pColData = &aColData[iColData];
     code = tColDataAppendValueImpl[pColData->flag][CV_FLAG_NONE](pColData, NULL, 0);
     if (code) goto _exit;
   }
@@ -853,11 +853,11 @@ static int32_t tRowAppendNoneToColData(SArray *aColData, int32_t nColData) {
 _exit:
   return code;
 }
-static int32_t tRowAppendNullToColData(SArray *aColData, int32_t nColData, STSchema *pSchema) {
+static int32_t tRowAppendNullToColData(SColData *aColData, int32_t nColData, STSchema *pSchema) {
   int32_t code = 0;
 
   int32_t   iColData = 0;
-  SColData *pColData = taosArrayGet(aColData, iColData);
+  SColData *pColData = &aColData[iColData];
   int32_t   iTColumn = 1;
   STColumn *pTColumn = &pSchema->columns[iTColumn];
 
@@ -866,12 +866,12 @@ static int32_t tRowAppendNullToColData(SArray *aColData, int32_t nColData, STSch
       if (pTColumn->colId == pColData->cid) {  // NULL
         code = tColDataAppendValueImpl[pColData->flag][CV_FLAG_NULL](pColData, NULL, 0);
         if (code) goto _exit;
-        pColData = (++iColData < nColData) ? taosArrayGet(aColData, iColData) : NULL;
+        pColData = (++iColData < nColData) ? &aColData[iColData] : NULL;
         pTColumn = (++iTColumn < pSchema->numOfCols) ? &pSchema->columns[iTColumn] : NULL;
       } else if (pTColumn->colId > pColData->cid) {  // NONE
         code = tColDataAppendValueImpl[pColData->flag][CV_FLAG_NONE](pColData, NULL, 0);
         if (code) goto _exit;
-        pColData = (++iColData < nColData) ? taosArrayGet(aColData, iColData) : NULL;
+        pColData = (++iColData < nColData) ? &aColData[iColData] : NULL;
       } else {
         pTColumn = (++iTColumn < pSchema->numOfCols) ? &pSchema->columns[iTColumn] : NULL;
       }
@@ -879,18 +879,18 @@ static int32_t tRowAppendNullToColData(SArray *aColData, int32_t nColData, STSch
       code = tColDataAppendValueImpl[pColData->flag][CV_FLAG_NONE](pColData, NULL, 0);
       if (code) goto _exit;
 
-      pColData = (++iColData < nColData) ? taosArrayGet(aColData, iColData) : NULL;
+      pColData = (++iColData < nColData) ? &aColData[iColData] : NULL;
     }
   }
 
 _exit:
   return code;
 }
-static int32_t tRowAppendTupleToColData(SRow *pRow, STSchema *pTSchema, SArray *aColData, int32_t nColData) {
+static int32_t tRowAppendTupleToColData(SRow *pRow, STSchema *pTSchema, SColData *aColData, int32_t nColData) {
   int32_t code = 0;
 
   int32_t   iColData = 0;
-  SColData *pColData = taosArrayGet(aColData, iColData);
+  SColData *pColData = &aColData[iColData];
   int32_t   iTColumn = 1;
   STColumn *pTColumn = &pTSchema->columns[iTColumn];
 
@@ -971,13 +971,13 @@ static int32_t tRowAppendTupleToColData(SRow *pRow, STSchema *pTSchema, SArray *
         }
 
       _continue:
-        pColData = (++iColData < nColData) ? taosArrayGet(aColData, iColData) : NULL;
+        pColData = (++iColData < nColData) ? &aColData[iColData] : NULL;
         pTColumn = (++iTColumn < pTSchema->numOfCols) ? &pTSchema->columns[iTColumn] : NULL;
       } else if (pTColumn->colId > pColData->cid) {  // NONE
         code = tColDataAppendValueImpl[pColData->flag][CV_FLAG_NONE](pColData, NULL, 0);
         if (code) goto _exit;
 
-        pColData = (++iColData < nColData) ? taosArrayGet(aColData, iColData) : NULL;
+        pColData = (++iColData < nColData) ? &aColData[iColData] : NULL;
       } else {
         pTColumn = (++iTColumn < pTSchema->numOfCols) ? &pTSchema->columns[iTColumn] : NULL;
       }
@@ -985,20 +985,20 @@ static int32_t tRowAppendTupleToColData(SRow *pRow, STSchema *pTSchema, SArray *
       code = tColDataAppendValueImpl[pColData->flag][CV_FLAG_NONE](pColData, NULL, 0);
       if (code) goto _exit;
 
-      pColData = (++iColData < nColData) ? taosArrayGet(aColData, iColData) : NULL;
+      pColData = (++iColData < nColData) ? &aColData[iColData] : NULL;
     }
   }
 
 _exit:
   return code;
 }
-static int32_t tRowAppendKVToColData(SRow *pRow, STSchema *pTSchema, SArray *aColData, int32_t nColData) {
+static int32_t tRowAppendKVToColData(SRow *pRow, STSchema *pTSchema, SColData *aColData, int32_t nColData) {
   int32_t code = 0;
 
   SKVIdx   *pKVIdx = (SKVIdx *)pRow->data;
   uint8_t  *pv = NULL;
   int32_t   iColData = 0;
-  SColData *pColData = taosArrayGet(aColData, iColData);
+  SColData *pColData = &aColData[iColData];
   int32_t   iTColumn = 1;
   STColumn *pTColumn = &pTSchema->columns[iTColumn];
   int32_t   iCol = 0;
@@ -1054,26 +1054,26 @@ static int32_t tRowAppendKVToColData(SRow *pRow, STSchema *pTSchema, SArray *aCo
         if (code) goto _exit;
 
       _continue:
-        pColData = (++iColData < nColData) ? taosArrayGet(aColData, iColData) : NULL;
+        pColData = (++iColData < nColData) ? &aColData[iColData] : NULL;
         pTColumn = (++iTColumn < pTSchema->numOfCols) ? &pTSchema->columns[iTColumn] : NULL;
       } else if (pTColumn->colId > pColData->cid) {
         code = tColDataAppendValueImpl[pColData->flag][CV_FLAG_NONE](pColData, NULL, 0);
         if (code) goto _exit;
-        pColData = (++iColData < nColData) ? taosArrayGet(aColData, iColData) : NULL;
+        pColData = (++iColData < nColData) ? &aColData[iColData] : NULL;
       } else {
         pTColumn = (++iTColumn < pTSchema->numOfCols) ? &pTSchema->columns[iTColumn] : NULL;
       }
     } else {
       code = tColDataAppendValueImpl[pColData->flag][CV_FLAG_NONE](pColData, NULL, 0);
       if (code) goto _exit;
-      pColData = (++iColData < nColData) ? taosArrayGet(aColData, iColData) : NULL;
+      pColData = (++iColData < nColData) ? &aColData[iColData] : NULL;
     }
   }
 
 _exit:
   return code;
 }
-int32_t tRowAppendToColData(SRow *pRow, STSchema *pTSchema, SArray *aColData, int32_t nColData) {
+int32_t tRowAppendToColData(SRow *pRow, STSchema *pTSchema, SColData *aColData, int32_t nColData) {
   ASSERT(pRow->sver == pTSchema->version);
   ASSERT(nColData > 0);
 
@@ -1529,7 +1529,7 @@ void tColDataDestroy(void *ph) {
   SColData *pColData = (SColData *)ph;
 
   tFree(pColData->pBitMap);
-  tFree((uint8_t *)pColData->aOffset);
+  tFree(pColData->aOffset);
   tFree(pColData->pData);
 }
 
diff --git a/source/dnode/vnode/src/inc/tsdb.h b/source/dnode/vnode/src/inc/tsdb.h
index 19a47646b5cecfd4cd8e563f5607ab626e9a7b69..5346a5866747b3d878b2c1b659bac7f7a038fbbe 100644
--- a/source/dnode/vnode/src/inc/tsdb.h
+++ b/source/dnode/vnode/src/inc/tsdb.h
@@ -150,24 +150,22 @@ int32_t tGetBlockIdx(uint8_t *p, void *ph);
 int32_t tCmprBlockIdx(void const *lhs, void const *rhs);
 int32_t tCmprBlockL(void const *lhs, void const *rhs);
 // SBlockData
-#define tBlockDataFirstRow(PBLOCKDATA) tsdbRowFromBlockData(PBLOCKDATA, 0)
-#define tBlockDataLastRow(PBLOCKDATA)  tsdbRowFromBlockData(PBLOCKDATA, (PBLOCKDATA)->nRow - 1)
-#define tBlockDataFirstKey(PBLOCKDATA) TSDBROW_KEY(&tBlockDataFirstRow(PBLOCKDATA))
-#define tBlockDataLastKey(PBLOCKDATA)  TSDBROW_KEY(&tBlockDataLastRow(PBLOCKDATA))
-
-int32_t   tBlockDataCreate(SBlockData *pBlockData);
-void      tBlockDataDestroy(SBlockData *pBlockData);
-int32_t   tBlockDataInit(SBlockData *pBlockData, TABLEID *pId, STSchema *pTSchema, int16_t *aCid, int32_t nCid);
-void      tBlockDataReset(SBlockData *pBlockData);
-int32_t   tBlockDataAppendRow(SBlockData *pBlockData, TSDBROW *pRow, STSchema *pTSchema, int64_t uid);
-void      tBlockDataClear(SBlockData *pBlockData);
-SColData *tBlockDataGetColDataByIdx(SBlockData *pBlockData, int32_t idx);
-void      tBlockDataGetColData(SBlockData *pBlockData, int16_t cid, SColData **ppColData);
-int32_t   tBlockDataMerge(SBlockData *pBlockData1, SBlockData *pBlockData2, SBlockData *pBlockData);
-int32_t   tBlockDataAddColData(SBlockData *pBlockData, SColData **ppColData);
-int32_t   tCmprBlockData(SBlockData *pBlockData, int8_t cmprAlg, uint8_t **ppOut, int32_t *szOut, uint8_t *aBuf[],
-                         int32_t aBufN[]);
-int32_t   tDecmprBlockData(uint8_t *pIn, int32_t szIn, SBlockData *pBlockData, uint8_t *aBuf[]);
+#define tBlockDataFirstRow(PBLOCKDATA)             tsdbRowFromBlockData(PBLOCKDATA, 0)
+#define tBlockDataLastRow(PBLOCKDATA)              tsdbRowFromBlockData(PBLOCKDATA, (PBLOCKDATA)->nRow - 1)
+#define tBlockDataFirstKey(PBLOCKDATA)             TSDBROW_KEY(&tBlockDataFirstRow(PBLOCKDATA))
+#define tBlockDataLastKey(PBLOCKDATA)              TSDBROW_KEY(&tBlockDataLastRow(PBLOCKDATA))
+#define tBlockDataGetColDataByIdx(PBLOCKDATA, IDX) (&(PBLOCKDATA)->aColData[IDX])
+
+int32_t tBlockDataCreate(SBlockData *pBlockData);
+void    tBlockDataDestroy(SBlockData *pBlockData);
+int32_t tBlockDataInit(SBlockData *pBlockData, TABLEID *pId, STSchema *pTSchema, int16_t *aCid, int32_t nCid);
+void    tBlockDataReset(SBlockData *pBlockData);
+int32_t tBlockDataAppendRow(SBlockData *pBlockData, TSDBROW *pRow, STSchema *pTSchema, int64_t uid);
+void    tBlockDataClear(SBlockData *pBlockData);
+void    tBlockDataGetColData(SBlockData *pBlockData, int16_t cid, SColData **ppColData);
+int32_t tCmprBlockData(SBlockData *pBlockData, int8_t cmprAlg, uint8_t **ppOut, int32_t *szOut, uint8_t *aBuf[],
+                       int32_t aBufN[]);
+int32_t tDecmprBlockData(uint8_t *pIn, int32_t szIn, SBlockData *pBlockData, uint8_t *aBuf[]);
 // SDiskDataHdr
 int32_t tPutDiskDataHdr(uint8_t *p, const SDiskDataHdr *pHdr);
 int32_t tGetDiskDataHdr(uint8_t *p, void *ph);
@@ -473,14 +471,14 @@ struct SSttBlk {
 // (SBlockData){.suid = suid, .uid = 0}: block data for N child tables int .last file
 // (SBlockData){.suid = 0, .uid = uid}: block data for 1 normal table int .last/.data file
 struct SBlockData {
-  int64_t  suid;      // 0 means normal table block data, otherwise child table block data
-  int64_t  uid;       // 0 means block data in .last file, otherwise in .data file
-  int32_t  nRow;      // number of rows
-  int64_t *aUid;      // uids of each row, only exist in block data in .last file (uid == 0)
-  int64_t *aVersion;  // versions of each row
-  TSKEY   *aTSKEY;    // timestamp of each row
-  int32_t  nColData;
-  SArray  *aColData;  // SArray<SColData>
+  int64_t   suid;      // 0 means normal table block data, otherwise child table block data
+  int64_t   uid;       // 0 means block data in .last file, otherwise in .data file
+  int32_t   nRow;      // number of rows
+  int64_t  *aUid;      // uids of each row, only exist in block data in .last file (uid == 0)
+  int64_t  *aVersion;  // versions of each row
+  TSKEY    *aTSKEY;    // timestamp of each row
+  int32_t   nColData;
+  SColData *aColData;
 };
 
 struct TABLEID {
diff --git a/source/dnode/vnode/src/tsdb/tsdbUtil.c b/source/dnode/vnode/src/tsdb/tsdbUtil.c
index 98560a2fc60316e302d941ad721a53884302fc45..23740583a485f5cf6133e2b9a050c22db4ced0bf 100644
--- a/source/dnode/vnode/src/tsdb/tsdbUtil.c
+++ b/source/dnode/vnode/src/tsdb/tsdbUtil.c
@@ -23,7 +23,7 @@ void tMapDataReset(SMapData *pMapData) {
 }
 
 void tMapDataClear(SMapData *pMapData) {
-  tFree((uint8_t *)pMapData->aOffset);
+  tFree(pMapData->aOffset);
   tFree(pMapData->pData);
   pMapData->pData = NULL;
   pMapData->aOffset = NULL;
@@ -928,27 +928,49 @@ int32_t tBlockDataCreate(SBlockData *pBlockData) {
   pBlockData->aVersion = NULL;
   pBlockData->aTSKEY = NULL;
   pBlockData->nColData = 0;
-  pBlockData->aColData = taosArrayInit(0, sizeof(SColData));
-  if (pBlockData->aColData == NULL) {
-    code = TSDB_CODE_OUT_OF_MEMORY;
-    goto _exit;
-  }
+  pBlockData->aColData = NULL;
 
 _exit:
   return code;
 }
 
 void tBlockDataDestroy(SBlockData *pBlockData) {
-  tFree((uint8_t *)pBlockData->aUid);
-  tFree((uint8_t *)pBlockData->aVersion);
-  tFree((uint8_t *)pBlockData->aTSKEY);
-  taosArrayDestroyEx(pBlockData->aColData, tColDataDestroy);
-  pBlockData->aUid = NULL;
-  pBlockData->aVersion = NULL;
-  pBlockData->aTSKEY = NULL;
-  pBlockData->aColData = NULL;
+  tFree(pBlockData->aUid);
+  tFree(pBlockData->aVersion);
+  tFree(pBlockData->aTSKEY);
+
+  for (int32_t i = 0; i < pBlockData->nColData; i++) {
+    tColDataDestroy(&pBlockData->aColData[i]);
+  }
+
+  if (pBlockData->aColData) {
+    taosMemoryFree(pBlockData->aColData);
+    pBlockData->aColData = NULL;
+  }
 }
 
+static int32_t tBlockDataAdjustColData(SBlockData *pBlockData, int32_t nColData) {
+  int32_t code = 0;
+
+  if (pBlockData->nColData > nColData) {
+    for (int32_t i = nColData; i < pBlockData->nColData; i++) {
+      tColDataDestroy(&pBlockData->aColData[i]);
+    }
+  } else if (pBlockData->nColData < nColData) {
+    SColData *aColData = taosMemoryRealloc(pBlockData->aColData, sizeof(SBlockData) * nColData);
+    if (aColData == NULL) {
+      code = TSDB_CODE_OUT_OF_MEMORY;
+      goto _exit;
+    }
+
+    pBlockData->aColData = aColData;
+    memset(&pBlockData->aColData[pBlockData->nColData], 0, sizeof(SBlockData) * (nColData - pBlockData->nColData));
+  }
+  pBlockData->nColData = nColData;
+
+_exit:
+  return code;
+}
 int32_t tBlockDataInit(SBlockData *pBlockData, TABLEID *pId, STSchema *pTSchema, int16_t *aCid, int32_t nCid) {
   int32_t code = 0;
 
@@ -958,37 +980,35 @@ int32_t tBlockDataInit(SBlockData *pBlockData, TABLEID *pId, STSchema *pTSchema,
   pBlockData->uid = pId->uid;
   pBlockData->nRow = 0;
 
-  pBlockData->nColData = 0;
   if (aCid) {
+    code = tBlockDataAdjustColData(pBlockData, nCid);
+    if (code) goto _exit;
+
     int32_t   iColumn = 1;
     STColumn *pTColumn = &pTSchema->columns[iColumn];
     for (int32_t iCid = 0; iCid < nCid; iCid++) {
-      while (pTColumn && pTColumn->colId < aCid[iCid]) {
+      ASSERT(pTColumn);
+      while (pTColumn->colId < aCid[iCid]) {
         iColumn++;
-        pTColumn = (iColumn < pTSchema->numOfCols) ? &pTSchema->columns[iColumn] : NULL;
+        ASSERT(iColumn < pTSchema->numOfCols);
+        pTColumn = &pTSchema->columns[iColumn];
       }
 
-      if (pTColumn == NULL) {
-        break;
-      } else if (pTColumn->colId == aCid[iCid]) {
-        SColData *pColData;
-        code = tBlockDataAddColData(pBlockData, &pColData);
-        if (code) goto _exit;
-        tColDataInit(pColData, pTColumn->colId, pTColumn->type, (pTColumn->flags & COL_SMA_ON) ? 1 : 0);
+      ASSERT(pTColumn->colId == aCid[iCid]);
+      tColDataInit(&pBlockData->aColData[iCid], pTColumn->colId, pTColumn->type,
+                   (pTColumn->flags & COL_SMA_ON) ? 1 : 0);
 
-        iColumn++;
-        pTColumn = (iColumn < pTSchema->numOfCols) ? &pTSchema->columns[iColumn] : NULL;
-      }
+      iColumn++;
+      pTColumn = (iColumn < pTSchema->numOfCols) ? &pTSchema->columns[iColumn] : NULL;
     }
   } else {
-    for (int32_t iColumn = 1; iColumn < pTSchema->numOfCols; iColumn++) {
-      STColumn *pTColumn = &pTSchema->columns[iColumn];
-
-      SColData *pColData;
-      code = tBlockDataAddColData(pBlockData, &pColData);
-      if (code) goto _exit;
+    code = tBlockDataAdjustColData(pBlockData, pTSchema->numOfCols - 1);
+    if (code) goto _exit;
 
-      tColDataInit(pColData, pTColumn->colId, pTColumn->type, (pTColumn->flags & COL_SMA_ON) ? 1 : 0);
+    for (int32_t iColData = 0; iColData < pBlockData->nColData; iColData++) {
+      STColumn *pTColumn = &pTSchema->columns[iColData + 1];
+      tColDataInit(&pBlockData->aColData[iColData], pTColumn->colId, pTColumn->type,
+                   (pTColumn->flags & COL_SMA_ON) ? 1 : 0);
     }
   }
 
@@ -999,8 +1019,6 @@ _exit:
 void tBlockDataReset(SBlockData *pBlockData) {
   pBlockData->suid = 0;
   pBlockData->uid = 0;
-  pBlockData->nRow = 0;
-  pBlockData->nColData = 0;
 }
 
 void tBlockDataClear(SBlockData *pBlockData) {
@@ -1008,31 +1026,8 @@ void tBlockDataClear(SBlockData *pBlockData) {
 
   pBlockData->nRow = 0;
   for (int32_t iColData = 0; iColData < pBlockData->nColData; iColData++) {
-    SColData *pColData = tBlockDataGetColDataByIdx(pBlockData, iColData);
-    tColDataClear(pColData);
-  }
-}
-
-int32_t tBlockDataAddColData(SBlockData *pBlockData, SColData **ppColData) {
-  int32_t   code = 0;
-  SColData *pColData = NULL;
-
-  if (pBlockData->nColData >= taosArrayGetSize(pBlockData->aColData)) {
-    if (taosArrayPush(pBlockData->aColData, &((SColData){0})) == NULL) {
-      code = TSDB_CODE_OUT_OF_MEMORY;
-      goto _err;
-    }
+    tColDataClear(tBlockDataGetColDataByIdx(pBlockData, iColData));
   }
-  pColData = (SColData *)taosArrayGet(pBlockData->aColData, pBlockData->nColData);
-
-  pBlockData->nColData++;
-
-  *ppColData = pColData;
-  return code;
-
-_err:
-  *ppColData = NULL;
-  return code;
 }
 
 static int32_t tBlockDataAppendBlockRow(SBlockData *pBlockData, SBlockData *pBlockDataFrom, int32_t iRow) {
@@ -1095,12 +1090,14 @@ int32_t tBlockDataAppendRow(SBlockData *pBlockData, TSDBROW *pRow, STSchema *pTS
   pBlockData->aTSKEY[pBlockData->nRow] = TSDBROW_TS(pRow);
 
   SColVal cv = {0};
-  if (pRow->type == 0) {
+  if (pRow->type == TSDBROW_ROW_FMT) {
     code = tRowAppendToColData(pRow->pTSRow, pTSchema, pBlockData->aColData, pBlockData->nColData);
     if (code) goto _err;
-  } else {
+  } else if (pRow->type == TSDBROW_COL_FMT) {
     code = tBlockDataAppendBlockRow(pBlockData, pRow->pBlockData, pRow->iRow);
     if (code) goto _err;
+  } else {
+    ASSERT(0);
   }
   pBlockData->nRow++;
 
@@ -1110,133 +1107,13 @@ _err:
   return code;
 }
 
-int32_t tBlockDataCorrectSchema(SBlockData *pBlockData, SBlockData *pBlockDataFrom) {
-  int32_t code = 0;
-
-  int32_t iColData = 0;
-  for (int32_t iColDataFrom = 0; iColDataFrom < pBlockDataFrom->nColData; iColDataFrom++) {
-    SColData *pColDataFrom = tBlockDataGetColDataByIdx(pBlockDataFrom, iColDataFrom);
-
-    while (true) {
-      SColData *pColData;
-      if (iColData < pBlockData->nColData) {
-        pColData = tBlockDataGetColDataByIdx(pBlockData, iColData);
-      } else {
-        pColData = NULL;
-      }
-
-      if (pColData == NULL || pColData->cid > pColDataFrom->cid) {
-        code = tBlockDataAddColData(pBlockData, &pColData);
-        if (code) goto _exit;
-
-        tColDataInit(pColData, pColDataFrom->cid, pColDataFrom->type, pColDataFrom->smaOn);
-        for (int32_t iRow = 0; iRow < pBlockData->nRow; iRow++) {
-          code = tColDataAppendValue(pColData, &COL_VAL_NONE(pColData->cid, pColData->type));
-          if (code) goto _exit;
-        }
-
-        iColData++;
-        break;
-      } else if (pColData->cid == pColDataFrom->cid) {
-        iColData++;
-        break;
-      } else {
-        iColData++;
-      }
-    }
-  }
-
-_exit:
-  return code;
-}
-
-int32_t tBlockDataMerge(SBlockData *pBlockData1, SBlockData *pBlockData2, SBlockData *pBlockData) {
-  int32_t code = 0;
-
-  ASSERT(pBlockData->suid == pBlockData1->suid);
-  ASSERT(pBlockData->uid == pBlockData1->uid);
-  ASSERT(pBlockData1->nRow > 0);
-  ASSERT(pBlockData2->nRow > 0);
-
-  tBlockDataClear(pBlockData);
-
-  TSDBROW  row1 = tsdbRowFromBlockData(pBlockData1, 0);
-  TSDBROW  row2 = tsdbRowFromBlockData(pBlockData2, 0);
-  TSDBROW *pRow1 = &row1;
-  TSDBROW *pRow2 = &row2;
-
-  while (pRow1 && pRow2) {
-    int32_t c = tsdbRowCmprFn(pRow1, pRow2);
-
-    if (c < 0) {
-      code = tBlockDataAppendRow(pBlockData, pRow1, NULL,
-                                 pBlockData1->uid ? pBlockData1->uid : pBlockData1->aUid[pRow1->iRow]);
-      if (code) goto _exit;
-
-      pRow1->iRow++;
-      if (pRow1->iRow < pBlockData1->nRow) {
-        *pRow1 = tsdbRowFromBlockData(pBlockData1, pRow1->iRow);
-      } else {
-        pRow1 = NULL;
-      }
-    } else if (c > 0) {
-      code = tBlockDataAppendRow(pBlockData, pRow2, NULL,
-                                 pBlockData2->uid ? pBlockData2->uid : pBlockData2->aUid[pRow2->iRow]);
-      if (code) goto _exit;
-
-      pRow2->iRow++;
-      if (pRow2->iRow < pBlockData2->nRow) {
-        *pRow2 = tsdbRowFromBlockData(pBlockData2, pRow2->iRow);
-      } else {
-        pRow2 = NULL;
-      }
-    } else {
-      ASSERT(0);
-    }
-  }
-
-  while (pRow1) {
-    code = tBlockDataAppendRow(pBlockData, pRow1, NULL,
-                               pBlockData1->uid ? pBlockData1->uid : pBlockData1->aUid[pRow1->iRow]);
-    if (code) goto _exit;
-
-    pRow1->iRow++;
-    if (pRow1->iRow < pBlockData1->nRow) {
-      *pRow1 = tsdbRowFromBlockData(pBlockData1, pRow1->iRow);
-    } else {
-      pRow1 = NULL;
-    }
-  }
-
-  while (pRow2) {
-    code = tBlockDataAppendRow(pBlockData, pRow2, NULL,
-                               pBlockData2->uid ? pBlockData2->uid : pBlockData2->aUid[pRow2->iRow]);
-    if (code) goto _exit;
-
-    pRow2->iRow++;
-    if (pRow2->iRow < pBlockData2->nRow) {
-      *pRow2 = tsdbRowFromBlockData(pBlockData2, pRow2->iRow);
-    } else {
-      pRow2 = NULL;
-    }
-  }
-
-_exit:
-  return code;
-}
-
-SColData *tBlockDataGetColDataByIdx(SBlockData *pBlockData, int32_t idx) {
-  ASSERT(idx >= 0 && idx < pBlockData->nColData);
-  return (SColData *)taosArrayGet(pBlockData->aColData, idx);
-}
-
 void tBlockDataGetColData(SBlockData *pBlockData, int16_t cid, SColData **ppColData) {
   ASSERT(cid != PRIMARYKEY_TIMESTAMP_COL_ID);
   int32_t lidx = 0;
   int32_t ridx = pBlockData->nColData - 1;
 
   while (lidx <= ridx) {
-    int32_t   midx = (lidx + ridx) / 2;
+    int32_t   midx = (lidx + ridx) >> 2;
     SColData *pColData = tBlockDataGetColDataByIdx(pBlockData, midx);
     int32_t   c = (pColData->cid == cid) ? 0 : ((pColData->cid > cid) ? 1 : -1);
 
@@ -1383,15 +1260,25 @@ int32_t tDecmprBlockData(uint8_t *pIn, int32_t szIn, SBlockData *pBlockData, uin
   // loop to decode each column data
   if (hdr.szBlkCol == 0) goto _exit;
 
+  int32_t nColData = 0;
   int32_t nt = 0;
   while (nt < hdr.szBlkCol) {
     SBlockCol blockCol = {0};
     nt += tGetBlockCol(pIn + n + nt, &blockCol);
-    ASSERT(nt <= hdr.szBlkCol);
+    ++nColData;
+  }
+  ASSERT(nt == hdr.szBlkCol);
 
-    SColData *pColData;
-    code = tBlockDataAddColData(pBlockData, &pColData);
-    if (code) goto _exit;
+  code = tBlockDataAdjustColData(pBlockData, nColData);
+  if (code) goto _exit;
+
+  nt = 0;
+  int32_t iColData = 0;
+  while (nt < hdr.szBlkCol) {
+    SBlockCol blockCol = {0};
+    nt += tGetBlockCol(pIn + n + nt, &blockCol);
+
+    SColData *pColData = &pBlockData->aColData[iColData++];
 
     tColDataInit(pColData, blockCol.cid, blockCol.type, blockCol.smaOn);
     if (blockCol.flag == HAS_NULL) {