diff --git a/source/dnode/vnode/src/tsdb/tsdbCommit.c b/source/dnode/vnode/src/tsdb/tsdbCommit.c
index 108a138d34a598570a59739ce67bec192d581340..2395a4cd8b4185b98d96c31da79d0e244ae32007 100644
--- a/source/dnode/vnode/src/tsdb/tsdbCommit.c
+++ b/source/dnode/vnode/src/tsdb/tsdbCommit.c
@@ -53,7 +53,6 @@ typedef struct {
     // last
     SArray    *aBlockL;  // SArray<SBlockL>
     int32_t    iBlockL;
-    SBlockL   *pBlockL;
     SBlockData bDatal;
     int32_t    iRow;
     SRowInfo  *pRowInfo;
@@ -290,6 +289,54 @@ _err:
   return code;
 }
 
+static int32_t tsdbCommitterUpdateTableSchema(SCommitter *pCommitter, int64_t suid, int64_t uid, int32_t sver) {
+  int32_t code = 0;
+
+  if (pCommitter->skmTable.pTSchema) {
+    if (pCommitter->skmTable.suid == suid) {
+      if (suid == 0) {
+        if (pCommitter->skmTable.uid == uid && sver == pCommitter->skmTable.pTSchema->version) goto _exit;
+      } else {
+        if (sver == pCommitter->skmTable.pTSchema->version) goto _exit;
+      }
+    }
+  }
+
+  pCommitter->skmTable.suid = suid;
+  pCommitter->skmTable.uid = uid;
+  tTSchemaDestroy(pCommitter->skmTable.pTSchema);
+  code = metaGetTbTSchemaEx(pCommitter->pTsdb->pVnode->pMeta, suid, uid, sver, &pCommitter->skmTable.pTSchema);
+  if (code) goto _exit;
+
+_exit:
+  return code;
+}
+
+static int32_t tsdbCommitterUpdateRowSchema(SCommitter *pCommitter, int64_t suid, int64_t uid, int32_t sver) {
+  int32_t code = 0;
+
+  if (pCommitter->skmRow.pTSchema) {
+    if (pCommitter->skmRow.suid == suid) {
+      if (suid == 0) {
+        if (pCommitter->skmRow.uid == uid && sver == pCommitter->skmRow.pTSchema->version) goto _exit;
+      } else {
+        if (sver == pCommitter->skmRow.pTSchema->version) goto _exit;
+      }
+    }
+  }
+
+  pCommitter->skmRow.suid = suid;
+  pCommitter->skmRow.uid = uid;
+  tTSchemaDestroy(pCommitter->skmRow.pTSchema);
+  code = metaGetTbTSchemaEx(pCommitter->pTsdb->pVnode->pMeta, suid, uid, sver, &pCommitter->skmRow.pTSchema);
+  if (code) {
+    goto _exit;
+  }
+
+_exit:
+  return code;
+}
+
 static int32_t tsdbCommitterNextLastRow(SCommitter *pCommitter) {
   int32_t code = 0;
 
@@ -308,8 +355,17 @@ static int32_t tsdbCommitterNextLastRow(SCommitter *pCommitter) {
   } else {
     pCommitter->dReader.iBlockL++;
     if (pCommitter->dReader.iBlockL < taosArrayGetSize(pCommitter->dReader.aBlockL)) {
-      pCommitter->dReader.pBlockL = (SBlockL *)taosArrayGet(pCommitter->dReader.aBlockL, pCommitter->dReader.iBlockL);
-      code = tsdbReadLastBlock(pCommitter->dReader.pReader, pCommitter->dReader.pBlockL, pBlockDatal);
+      SBlockL *pBlockL = (SBlockL *)taosArrayGet(pCommitter->dReader.aBlockL, pCommitter->dReader.iBlockL);
+      int64_t  suid = pBlockL->suid;
+      int64_t  uid = pBlockL->maxUid;
+
+      code = tsdbCommitterUpdateTableSchema(pCommitter, suid, uid, 1 /*TODO*/);
+      if (code) goto _exit;
+
+      code = tBlockDataInit(pBlockDatal, suid, suid ? 0 : uid, pCommitter->skmTable.pTSchema);
+      if (code) goto _exit;
+
+      code = tsdbReadLastBlock(pCommitter->dReader.pReader, pBlockL, pBlockDatal);
       if (code) goto _exit;
 
       pCommitter->dReader.iRow = 0;
@@ -444,54 +500,6 @@ _err:
   return code;
 }
 
-static int32_t tsdbCommitterUpdateTableSchema(SCommitter *pCommitter, int64_t suid, int64_t uid, int32_t sver) {
-  int32_t code = 0;
-
-  if (pCommitter->skmTable.pTSchema) {
-    if (pCommitter->skmTable.suid == suid) {
-      if (suid == 0) {
-        if (pCommitter->skmTable.uid == uid && sver == pCommitter->skmTable.pTSchema->version) goto _exit;
-      } else {
-        if (sver == pCommitter->skmTable.pTSchema->version) goto _exit;
-      }
-    }
-  }
-
-  pCommitter->skmTable.suid = suid;
-  pCommitter->skmTable.uid = uid;
-  tTSchemaDestroy(pCommitter->skmTable.pTSchema);
-  code = metaGetTbTSchemaEx(pCommitter->pTsdb->pVnode->pMeta, suid, uid, sver, &pCommitter->skmTable.pTSchema);
-  if (code) goto _exit;
-
-_exit:
-  return code;
-}
-
-static int32_t tsdbCommitterUpdateRowSchema(SCommitter *pCommitter, int64_t suid, int64_t uid, int32_t sver) {
-  int32_t code = 0;
-
-  if (pCommitter->skmRow.pTSchema) {
-    if (pCommitter->skmRow.suid == suid) {
-      if (suid == 0) {
-        if (pCommitter->skmRow.uid == uid && sver == pCommitter->skmRow.pTSchema->version) goto _exit;
-      } else {
-        if (sver == pCommitter->skmRow.pTSchema->version) goto _exit;
-      }
-    }
-  }
-
-  pCommitter->skmRow.suid = suid;
-  pCommitter->skmRow.uid = uid;
-  tTSchemaDestroy(pCommitter->skmRow.pTSchema);
-  code = metaGetTbTSchemaEx(pCommitter->pTsdb->pVnode->pMeta, suid, uid, sver, &pCommitter->skmRow.pTSchema);
-  if (code) {
-    goto _exit;
-  }
-
-_exit:
-  return code;
-}
-
 static int32_t tsdbCommitDataBlock(SCommitter *pCommitter, SBlock *pBlock) {
   int32_t     code = 0;
   SBlockData *pBlockData = &pCommitter->dWriter.bData;
@@ -779,13 +787,13 @@ static int32_t tsdbMergeCommitLast(SCommitter *pCommitter, STbDataIter *pIter) {
   STbData *pTbData = pIter->pTbData;
   int32_t  nRow = tsdbGetNumOfRowsLessThan(pIter, (TSDBKEY){.ts = pCommitter->maxKey + 1, .version = VERSION_MIN});
 
-  if (pCommitter->dReader.pRowInfo) {
-    if (pCommitter->dReader.pRowInfo->suid) {
+  if (pCommitter->dReader.pRowInfo && tTABLEIDCmprFn(pTbData, pCommitter->dReader.pRowInfo) == 0) {
+    if (pCommitter->dReader.pRowInfo->suid) {  // super table
       for (int32_t iRow = pCommitter->dReader.iRow; iRow < pCommitter->dReader.bDatal.nRow; iRow++) {
         if (pTbData->uid != pCommitter->dReader.bDatal.aUid[iRow]) break;
         nRow++;
       }
-    } else {
+    } else {  // normal table
       ASSERT(pCommitter->dReader.iRow == 0);
       nRow += pCommitter->dReader.bDatal.nRow;
     }
@@ -812,10 +820,13 @@ static int32_t tsdbMergeCommitLast(SCommitter *pCommitter, STbDataIter *pIter) {
       pBlockData = &pCommitter->dWriter.bDatal;
 
       // commit and reset block data schema if need
-      if (pBlockData->nRow > 0) {
-        if (pBlockData->suid != pTbData->suid || pBlockData->suid == 0) {
-          code = tsdbCommitLastBlock(pCommitter);
-          if (code) goto _err;
+      // QUESTION: Is there a case that pBlockData->nRow == 0 but need to change schema ?
+      if (pBlockData->suid || pBlockData->uid) {
+        if (pBlockData->suid != pTbData->uid || pBlockData->suid == 0) {
+          if (pBlockData->nRow > 0) {
+            code = tsdbCommitLastBlock(pCommitter);
+            if (code) goto _err;
+          }
 
           tBlockDataReset(pBlockData);
         }
@@ -962,10 +973,12 @@ static int32_t tsdbCommitTableData(SCommitter *pCommitter, STbData *pTbData) {
     pBlock = NULL;
   }
 
-  code = tsdbCommitterUpdateTableSchema(pCommitter, pTbData->suid, pTbData->uid, pTbData->maxSkmVer);
+  code = tsdbCommitterUpdateTableSchema(pCommitter, pTbData->suid, pTbData->uid, pTbData->maxSkmVer /*TODO*/);
   if (code) goto _err;
 
   tMapDataReset(&pCommitter->dWriter.mBlock);
+  code = tBlockDataInit(&pCommitter->dReader.bData, pTbData->suid, pTbData->uid, pCommitter->skmTable.pTSchema);
+  if (code) goto _err;
   code = tBlockDataInit(&pCommitter->dWriter.bData, pTbData->suid, pTbData->uid, pCommitter->skmTable.pTSchema);
   if (code) goto _err;
 
@@ -1130,11 +1143,12 @@ static int32_t tsdbMoveCommitData(SCommitter *pCommitter, TABLEID toTable) {
     ASSERT(pBlockDataR->nRow > 0);
 
     // commit and reset block data schema if need
-    if (pBlockDataW->nRow > 0) {
-      if (pBlockDataW->suid != pCommitter->dReader.pRowInfo->suid || pBlockDataW->suid == 0) {
-        code = tsdbCommitLastBlock(pCommitter);
-        if (code) goto _err;
-
+    if (pBlockDataW->suid || pBlockDataW->uid) {
+      if (pBlockDataW->suid != suid || pBlockDataW->suid == 0) {
+        if (pBlockDataW->nRow > 0) {
+          code = tsdbCommitLastBlock(pCommitter);
+          if (code) goto _err;
+        }
         tBlockDataReset(pBlockDataW);
       }
     }
@@ -1151,9 +1165,10 @@ static int32_t tsdbMoveCommitData(SCommitter *pCommitter, TABLEID toTable) {
     // check if it can make sure that one table data in one block
     int32_t nRow = 0;
     if (pBlockDataR->suid) {
-      for (int32_t iRow = pCommitter->dReader.iRow; (iRow < pBlockDataR->nRow) && (pBlockDataR->aUid[iRow] == uid);
-           iRow++) {
+      int32_t iRow = pCommitter->dReader.iRow;
+      while ((iRow < pBlockDataR->nRow) && (pBlockDataR->aUid[iRow] == uid)) {
         nRow++;
+        iRow++;
       }
     } else {
       ASSERT(pCommitter->dReader.iRow == 0);