diff --git a/source/dnode/vnode/src/inc/tsdb.h b/source/dnode/vnode/src/inc/tsdb.h
index 1818c3ec9f..02a929fe5e 100644
--- a/source/dnode/vnode/src/inc/tsdb.h
+++ b/source/dnode/vnode/src/inc/tsdb.h
@@ -267,7 +267,7 @@ int32_t tsdbReadBlock(SDataFReader *pReader, SBlockIdx *pBlockIdx, SMapData *pMa
 int32_t tsdbReadSstBlk(SDataFReader *pReader, int32_t iSst, SArray *aSstBlk);
 int32_t tsdbReadBlockSma(SDataFReader *pReader, SDataBlk *pBlock, SArray *aColumnDataAgg);
 int32_t tsdbReadDataBlock(SDataFReader *pReader, SDataBlk *pBlock, SBlockData *pBlockData);
-int32_t tsdbReadSstBlock(SDataFReader *pReader, int32_t iSst, SSstBlk *pSstBlk, SBlockData *pBlockData);
+int32_t tsdbReadSstBlockEx(SDataFReader *pReader, int32_t iSst, SSstBlk *pSstBlk, SBlockData *pBlockData);
 // SDelFWriter
 int32_t tsdbDelFWriterOpen(SDelFWriter **ppWriter, SDelFile *pFile, STsdb *pTsdb);
 int32_t tsdbDelFWriterClose(SDelFWriter **ppWriter, int8_t sync);
diff --git a/source/dnode/vnode/src/tsdb/tsdbCommit.c b/source/dnode/vnode/src/tsdb/tsdbCommit.c
index f58226083b..83809cd128 100644
--- a/source/dnode/vnode/src/tsdb/tsdbCommit.c
+++ b/source/dnode/vnode/src/tsdb/tsdbCommit.c
@@ -92,9 +92,6 @@ typedef struct {
   SArray      *aDelData;  // SArray<SDelData>
 } SCommitter;
 
-extern int32_t tsdbReadSstBlockEx(SDataFReader *pReader, int32_t iSst, SSstBlk *aSstBlk,
-                                  SBlockData *pBlockData);  // todo
-
 static int32_t tsdbStartCommit(STsdb *pTsdb, SCommitter *pCommitter);
 static int32_t tsdbCommitData(SCommitter *pCommitter);
 static int32_t tsdbCommitDel(SCommitter *pCommitter);
diff --git a/source/dnode/vnode/src/tsdb/tsdbMergeTree.c b/source/dnode/vnode/src/tsdb/tsdbMergeTree.c
index 96901dc0ea..8606148bcd 100644
--- a/source/dnode/vnode/src/tsdb/tsdbMergeTree.c
+++ b/source/dnode/vnode/src/tsdb/tsdbMergeTree.c
@@ -114,8 +114,6 @@ void tLDataIterClose(SLDataIter *pIter) {
   taosMemoryFree(pIter);
 }
 
-extern int32_t tsdbReadSstBlockEx(SDataFReader *pReader, int32_t iSst, SSstBlk *pSstBlk, SBlockData *pBlockData);
-
 void tLDataIterNextBlock(SLDataIter *pIter) {
   int32_t step = pIter->backward ? -1 : 1;
   pIter->iSstBlk += step;
diff --git a/source/dnode/vnode/src/tsdb/tsdbReaderWriter.c b/source/dnode/vnode/src/tsdb/tsdbReaderWriter.c
index cd2c6e7051..03edfb0040 100644
--- a/source/dnode/vnode/src/tsdb/tsdbReaderWriter.c
+++ b/source/dnode/vnode/src/tsdb/tsdbReaderWriter.c
@@ -1095,19 +1095,6 @@ _err:
   return code;
 }
 
-int32_t tsdbReadSstBlock(SDataFReader *pReader, int32_t iSst, SSstBlk *pSstBlk, SBlockData *pBlockData) {
-  int32_t code = 0;
-
-  code = tsdbReadBlockDataImpl(pReader, &pSstBlk->bInfo, 1, pBlockData);
-  if (code) goto _err;
-
-  return code;
-
-_err:
-  tsdbError("vgId:%d tsdb read last block failed since %s", TD_VID(pReader->pTsdb->pVnode), tstrerror(code));
-  return code;
-}
-
 int32_t tsdbReadSstBlockEx(SDataFReader *pReader, int32_t iSst, SSstBlk *pSstBlk, SBlockData *pBlockData) {
   int32_t code = 0;