diff --git a/source/dnode/vnode/src/tsdb/dev/inc/tsdbSttFReaderWriter.h b/source/dnode/vnode/src/tsdb/dev/inc/tsdbSttFReaderWriter.h
index ab6e9c97ab..3c76a4289f 100644
--- a/source/dnode/vnode/src/tsdb/dev/inc/tsdbSttFReaderWriter.h
+++ b/source/dnode/vnode/src/tsdb/dev/inc/tsdbSttFReaderWriter.h
@@ -27,9 +27,21 @@ typedef struct SSttFSegReader       SSttFSegReader;
 typedef struct SSttFileReader       SSttFileReader;
 typedef struct SSttFileReaderConfig SSttFileReaderConfig;
 
+// SSttFileReader
 int32_t tsdbSttFReaderOpen(const SSttFileReaderConfig *config, SSttFileReader **ppReader);
 int32_t tsdbSttFReaderClose(SSttFileReader **ppReader);
 
+// SSttFSegReader
+int32_t tsdbSttFSegReaderOpen(SSttFileReader *pReader, SSttFSegReader **ppSegReader, int32_t nSegment);
+int32_t tsdbSttFSegReaderClose(SSttFSegReader **ppSegReader);
+int32_t tsdbSttFSegReadBloomFilter(SSttFSegReader *pSegReader, const void *pFilter);
+int32_t tsdbSttFSegReadStatisBlk(SSttFSegReader *pSegReader, const SArray *pStatis);
+int32_t tsdbSttFSegReadDelBlk(SSttFSegReader *pSegReader, const SArray *pDelBlk);
+int32_t tsdbSttFSegReadSttBlk(SSttFSegReader *pSegReader, const SArray *pSttBlk);
+int32_t tsdbSttFSegReadStatisBlock(SSttFSegReader *pSegReader, const void *pBlock);
+int32_t tsdbSttFSegReadDelBlock(SSttFSegReader *pSegReader, const void *pBlock);
+int32_t tsdbSttFSegReadSttBlock(SSttFSegReader *pSegReader, const void *pBlock);
+
 // SSttFWriter ==========================================
 typedef struct SSttFileWriter       SSttFileWriter;
 typedef struct SSttFileWriterConfig SSttFileWriterConfig;
diff --git a/source/dnode/vnode/src/tsdb/dev/tsdbSttFReaderWriter.c b/source/dnode/vnode/src/tsdb/dev/tsdbSttFReaderWriter.c
index fd0127bd49..75b3a5837e 100644
--- a/source/dnode/vnode/src/tsdb/dev/tsdbSttFReaderWriter.c
+++ b/source/dnode/vnode/src/tsdb/dev/tsdbSttFReaderWriter.c
@@ -27,6 +27,7 @@ struct SSttFileReader {
   // TODO
 };
 
+// SSttFileReader
 int32_t tsdbSttFReaderOpen(const SSttFileReaderConfig *config, SSttFileReader **ppReader) {
   int32_t code = 0;
   // TODO
@@ -39,6 +40,61 @@ int32_t tsdbSttFReaderClose(SSttFileReader **ppReader) {
   return code;
 }
 
+// SSttFSegReader
+int32_t tsdbSttFSegReaderOpen(SSttFileReader *pReader, SSttFSegReader **ppSegReader, int32_t nSegment) {
+  int32_t code = 0;
+  // TODO
+  return code;
+}
+
+int32_t tsdbSttFSegReaderClose(SSttFSegReader **ppSegReader) {
+  int32_t code = 0;
+  // TODO
+  return code;
+}
+
+int32_t tsdbSttFSegReadBloomFilter(SSttFSegReader *pSegReader, const void *pFilter) {
+  int32_t code = 0;
+  // TODO
+  return code;
+}
+
+int32_t tsdbSttFSegReadStatisBlk(SSttFSegReader *pSegReader, const SArray *pStatis) {
+  int32_t code = 0;
+  // TODO
+  return code;
+}
+
+int32_t tsdbSttFSegReadDelBlk(SSttFSegReader *pSegReader, const SArray *pDelBlk) {
+  int32_t code = 0;
+  // TODO
+  return code;
+}
+
+int32_t tsdbSttFSegReadSttBlk(SSttFSegReader *pSegReader, const SArray *pSttBlk) {
+  int32_t code = 0;
+  // TODO
+  return code;
+}
+
+int32_t tsdbSttFSegReadStatisBlock(SSttFSegReader *pSegReader, const void *pBlock) {
+  int32_t code = 0;
+  // TODO
+  return code;
+}
+
+int32_t tsdbSttFSegReadDelBlock(SSttFSegReader *pSegReader, const void *pBlock) {
+  int32_t code = 0;
+  // TODO
+  return code;
+}
+
+int32_t tsdbSttFSegReadSttBlock(SSttFSegReader *pSegReader, const void *pBlock) {
+  int32_t code = 0;
+  // TODO
+  return code;
+}
+
 // SSttFWriter ============================================================
 struct SSttFileWriter {
   SSttFileWriterConfig config;