diff --git a/source/common/src/tdataformat.c b/source/common/src/tdataformat.c
index 3ba8c0bc9e830a099eaa299549b8fda3f3ee189f..be894df89aa4b72ec9ba93cb7c142a8c7fd25524 100644
--- a/source/common/src/tdataformat.c
+++ b/source/common/src/tdataformat.c
@@ -857,12 +857,10 @@ static int32_t tRowNoneUpsertColData(SColData *aColData, int32_t nColData, int32
   if (flag) return code;
 
   for (int32_t iColData = 0; iColData < nColData; iColData++) {
-    SColData *pColData = &aColData[iColData];
-    code = tColDataAppendValueImpl[pColData->flag][CV_FLAG_NONE](pColData, NULL, 0);
-    if (code) goto _exit;
+    code = tColDataAppendValueImpl[aColData[iColData].flag][CV_FLAG_NONE](&aColData[iColData], NULL, 0);
+    if (code) return code;
   }
 
-_exit:
   return code;
 }
 static int32_t tRowNullUpsertColData(SColData *aColData, int32_t nColData, STSchema *pSchema, int32_t flag) {
diff --git a/source/dnode/vnode/src/inc/tsdb.h b/source/dnode/vnode/src/inc/tsdb.h
index 34dfe43b3e91e4f864090adad06ada61c3df722c..905bf6c411fd2758116a5fea94d8b898647dd3cc 100644
--- a/source/dnode/vnode/src/inc/tsdb.h
+++ b/source/dnode/vnode/src/inc/tsdb.h
@@ -163,6 +163,7 @@ 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);
+int32_t tBlockDataTryUpsertRow(SBlockData *pBlockData, TSDBROW *pRow, int64_t uid);
 int32_t tBlockDataUpsertRow(SBlockData *pBlockData, TSDBROW *pRow, STSchema *pTSchema, int64_t uid);
 void    tBlockDataClear(SBlockData *pBlockData);
 void    tBlockDataGetColData(SBlockData *pBlockData, int16_t cid, SColData **ppColData);
diff --git a/source/dnode/vnode/src/tsdb/tsdbCompact.c b/source/dnode/vnode/src/tsdb/tsdbCompact.c
index 16a255a1e0ca2243668a0b1cea0660703174dbcb..21caab8fee4fa67559554fbd02df83cc42f7f18e 100644
--- a/source/dnode/vnode/src/tsdb/tsdbCompact.c
+++ b/source/dnode/vnode/src/tsdb/tsdbCompact.c
@@ -852,13 +852,13 @@ static int32_t tsdbCompactFileSet(STsdbCompactor *pCompactor) {
 
   if (pRowInfo && (code = tBlockDataInit(&pCompactor->bData, (TABLEID *)pRowInfo, pTSchema, NULL, 0))) {
     TSDB_CHECK_CODE(code, lino, _exit);
+    pCompactor->tableId.suid = pRowInfo->suid;
+    pCompactor->tableId.uid = pRowInfo->uid;
   }
 
   while (pRowInfo) {
-    // write block data according to table id if necessary (TODO)
-    if ((pCompactor->tableId.suid != pRowInfo->suid) ||
-        (pCompactor->tableId.uid != pRowInfo->uid &&
-         (pRowInfo->suid == 0 || (pCompactor->bData.uid && pCompactor->bData.nRow >= pCompactor->minRows)))) {
+    // if suid changed
+    if (pCompactor->tableId.suid != pRowInfo->suid) {
       code = tsdbCompactWriteBlockData(pCompactor);
       TSDB_CHECK_CODE(code, lino, _exit);
 
@@ -867,10 +867,37 @@ static int32_t tsdbCompactFileSet(STsdbCompactor *pCompactor) {
 
       code = tBlockDataInit(&pCompactor->bData, (TABLEID *)pRowInfo, pTSchema, NULL, 0);
       TSDB_CHECK_CODE(code, lino, _exit);
+      pCompactor->tableId.suid = pRowInfo->suid;
+      pCompactor->tableId.uid = pRowInfo->uid;
+    }
+
+    // if uid changed
+    if (pCompactor->tableId.uid != pRowInfo->uid) {
+      // if need to write the block data
+      bool init = false;
+      if (pCompactor->bData.suid == 0) {
+        code = tsdbCompactWriteBlockData(pCompactor);
+        TSDB_CHECK_CODE(code, lino, _exit);
+        init = true;
+      } else if (pCompactor->bData.uid && pCompactor->bData.nRow >= pCompactor->minRows) {
+        code = tsdbCompactWriteBlockData(pCompactor);
+        TSDB_CHECK_CODE(code, lino, _exit);
+      }
+
+      // write SDataBlk
+      code = tsdbCompactWriteDataBlk(pCompactor);
+      TSDB_CHECK_CODE(code, lino, _exit);
+
+      // init block data if need
+      if (init && (code = tBlockDataInit(&pCompactor->bData, (TABLEID *)pRowInfo, pTSchema, NULL, 0))) {
+        TSDB_CHECK_CODE(code, lino, _exit);
+        pCompactor->tableId.suid = pRowInfo->suid;
+        pCompactor->tableId.uid = pRowInfo->uid;
+      }
     }
 
-    // check if append/merge the row causes nRow exceed maxRows (TODO)
-    if (0 /* add the row causes row exceed maxRows */) {
+    // if append/merge the row causes nRow exceed maxRows
+    if (tBlockDataTryUpsertRow(&pCompactor->bData, &pRowInfo->row, pRowInfo->uid) > pCompactor->maxRows) {
       code = tsdbCompactWriteBlockData(pCompactor);
       TSDB_CHECK_CODE(code, lino, _exit);
     }
diff --git a/source/dnode/vnode/src/tsdb/tsdbUtil.c b/source/dnode/vnode/src/tsdb/tsdbUtil.c
index 5c0424de34ce7e35f2ac189741662b321ceb1d8a..2afa44374e775e9076fe6ecdd31477700b6a1bbf 100644
--- a/source/dnode/vnode/src/tsdb/tsdbUtil.c
+++ b/source/dnode/vnode/src/tsdb/tsdbUtil.c
@@ -1051,12 +1051,7 @@ static int32_t tBlockDataUpsertBlockRow(SBlockData *pBlockData, SBlockData *pBlo
 
     if (pColDataFrom == NULL || pColDataFrom->cid > pColDataTo->cid) {
       cv = COL_VAL_NONE(pColDataTo->cid, pColDataTo->type);
-      if (flag) {
-        code = tColDataUpdateValue(pColDataTo, &cv, flag > 0);
-      } else {
-        code = tColDataAppendValue(pColDataTo, &cv);
-      }
-      if (code) goto _exit;
+      if (flag == 0 && (code = tColDataAppendValue(pColDataTo, &cv))) goto _exit;
     } else {
       tColDataGetValue(pColDataFrom, iRow, &cv);
 
@@ -1137,6 +1132,19 @@ _exit:
   return code;
 }
 
+int32_t tBlockDataTryUpsertRow(SBlockData *pBlockData, TSDBROW *pRow, int64_t uid) {
+  if (pBlockData->nRow == 0) {
+    return 1;
+  }
+
+  int64_t luid = pBlockData->uid ? pBlockData->uid : pBlockData->aUid[pBlockData->nRow - 1];
+  if (luid == uid && pBlockData->aTSKEY[pBlockData->nRow - 1] == TSDBROW_TS(pRow)) {
+    return pBlockData->nRow;
+  } else {
+    return pBlockData->nRow + 1;
+  }
+}
+
 int32_t tBlockDataUpsertRow(SBlockData *pBlockData, TSDBROW *pRow, STSchema *pTSchema, int64_t uid) {
   int32_t code = 0;