diff --git a/source/dnode/vnode/src/tsdb/dev/inc/tsdbMerge.h b/source/dnode/vnode/src/tsdb/dev/inc/tsdbMerge.h
index ff35f28b76147cbdb740151bd14549ad82fd8c02..a2a0dfc7f07a439dc633e8afc2b8c317d0c1b6e3 100644
--- a/source/dnode/vnode/src/tsdb/dev/inc/tsdbMerge.h
+++ b/source/dnode/vnode/src/tsdb/dev/inc/tsdbMerge.h
@@ -16,6 +16,7 @@
 #include "tsdbDataFReaderWriter.h"
 #include "tsdbFS.h"
 #include "tsdbSttFReaderWriter.h"
+#include "tsdbUtil.h"
 
 #ifndef _TD_TSDB_MERGE_H_
 #define _TD_TSDB_MERGE_H_
diff --git a/source/dnode/vnode/src/tsdb/dev/tsdbMerge.c b/source/dnode/vnode/src/tsdb/dev/tsdbMerge.c
index 8d8f06e90c59ec59affb14c6ef5f8546d1de9a43..f8b972562faed23471736e11c52fc68dca935f91 100644
--- a/source/dnode/vnode/src/tsdb/dev/tsdbMerge.c
+++ b/source/dnode/vnode/src/tsdb/dev/tsdbMerge.c
@@ -30,6 +30,7 @@ typedef struct {
   SMergeCtx ctx;
   // config
   int32_t  maxRow;
+  int32_t  minRow;
   int32_t  szPage;
   int8_t   cmprAlg;
   int64_t  cid;
@@ -82,6 +83,28 @@ static int32_t tsdbMergeNextRow(SMerger *merger) {
   return 0;
 }
 
+static int32_t tsdbMergeToDataWriteTSDataBlock(SMerger *merger) {
+  if (merger->ctx.bData.nRow == 0) return 0;
+
+  int32_t code = 0;
+  int32_t lino = 0;
+  int32_t vid = TD_VID(merger->tsdb->pVnode);
+  if (merger->ctx.bData.nRow >= merger->minRow) {
+    // code = tsdbDataFWriteTSDataBlock(merger->dataWriter, &merger->ctx.bData);
+    // TSDB_CHECK_CODE(code, lino, _exit);
+  } else {
+    code = tsdbSttFWriteTSDataBlock(merger->sttWriter, &merger->ctx.bData);
+    TSDB_CHECK_CODE(code, lino, _exit);
+  }
+
+  tBlockDataReset(&merger->ctx.bData);
+
+_exit:
+  if (code) {
+    tsdbError("vgId:%d %s failed at line %d since %s", vid, __func__, lino, tstrerror(code));
+  }
+  return code;
+}
 static int32_t tsdbMergeToData(SMerger *merger) {
   int32_t code = 0;
   int32_t lino = 0;
@@ -91,16 +114,30 @@ static int32_t tsdbMergeToData(SMerger *merger) {
     code = tsdbMergeNextRow(merger);
     TSDB_CHECK_CODE(code, lino, _exit);
 
-    if (!merger->ctx.pRowInfo) break;
+    if (!merger->ctx.pRowInfo) {
+      code = tsdbMergeToDataWriteTSDataBlock(merger);
+      TSDB_CHECK_CODE(code, lino, _exit);
+      break;
+    }
+
+    if (!TABLE_SAME_SCHEMA(merger->ctx.bData.suid, merger->ctx.bData.suid, merger->ctx.pRowInfo->suid,
+                           merger->ctx.pRowInfo->uid)) {
+      code = tsdbMergeToDataWriteTSDataBlock(merger);
+      TSDB_CHECK_CODE(code, lino, _exit);
+
+      code = tsdbUpdateSkmTb(merger->tsdb, (TABLEID *)merger->ctx.pRowInfo, &merger->skmTb);
+      TSDB_CHECK_CODE(code, lino, _exit);
+
+      code = tBlockDataInit(&merger->ctx.bData, (TABLEID *)merger->ctx.pRowInfo, merger->skmTb.pTSchema, NULL, 0);
+      TSDB_CHECK_CODE(code, lino, _exit);
+    }
 
     code = tBlockDataAppendRow(&merger->ctx.bData, &merger->ctx.pRowInfo->row, NULL, merger->ctx.pRowInfo->uid);
     TSDB_CHECK_CODE(code, lino, _exit);
 
     if (merger->ctx.bData.nRow >= merger->maxRow) {
-      // code = tsdbDataFWriteTSDataBlock(merger->dataWriter, &merger->ctx.bData);
-      // TSDB_CHECK_CODE(code, lino, _exit);
-
-      tBlockDataReset(&merger->ctx.bData);
+      code = tsdbMergeToDataWriteTSDataBlock(merger);
+      TSDB_CHECK_CODE(code, lino, _exit);
     }
   }
 
diff --git a/source/dnode/vnode/src/tsdb/dev/tsdbSttFReaderWriter.c b/source/dnode/vnode/src/tsdb/dev/tsdbSttFReaderWriter.c
index d793a257447bedb359a5e4dc28f37e9c97cad2f4..4560e76c67c4db20e6d74e3da1ed27c0682b5e04 100644
--- a/source/dnode/vnode/src/tsdb/dev/tsdbSttFReaderWriter.c
+++ b/source/dnode/vnode/src/tsdb/dev/tsdbSttFReaderWriter.c
@@ -673,7 +673,24 @@ _exit:
 }
 
 int32_t tsdbSttFWriteTSDataBlock(SSttFileWriter *pWriter, SBlockData *pBlockData) {
-  // TODO
+  int32_t code = 0;
+  int32_t lino = 0;
+
+  SRowInfo rowInfo;
+  rowInfo.suid = pBlockData->suid;
+  for (int32_t i = 0; i < pBlockData->nRow; i++) {
+    rowInfo.uid = pBlockData->uid ? pBlockData->uid : pBlockData->aUid[i];
+    rowInfo.row = tsdbRowFromBlockData(pBlockData, i);
+
+    code = tsdbSttFWriteTSData(pWriter, &rowInfo);
+    TSDB_CHECK_CODE(code, lino, _exit);
+  }
+
+_exit:
+  if (code) {
+    tsdbError("vgId:%d %s failed at line %d since %s", TD_VID(pWriter->config.pTsdb->pVnode), __func__, lino,
+              tstrerror(code));
+  }
   return 0;
 }