diff --git a/src/inc/tsdb.h b/src/inc/tsdb.h
index 38ded5cf10720b7b0f4443e22cd4146da0ab3f7e..a59a278d527b93be77035ca662a0302081dda4d6 100644
--- a/src/inc/tsdb.h
+++ b/src/inc/tsdb.h
@@ -104,9 +104,10 @@ void tsdbClearTableCfg(STableCfg *config);
 int32_t tsdbGetTableTagVal(TsdbRepoT *repo, STableId id, int32_t col, int16_t *type, int16_t *bytes, char **val);
 int32_t tsdbTableGetName(TsdbRepoT *repo, STableId id, char** name);
 
-int tsdbCreateTable(TsdbRepoT *repo, STableCfg *pCfg);
-int tsdbDropTable(TsdbRepoT *pRepo, STableId tableId);
-int tsdbAlterTable(TsdbRepoT *repo, STableCfg *pCfg);
+int   tsdbCreateTable(TsdbRepoT *repo, STableCfg *pCfg);
+int   tsdbDropTable(TsdbRepoT *pRepo, STableId tableId);
+int   tsdbAlterTable(TsdbRepoT *repo, STableCfg *pCfg);
+TSKEY tsdbGetTableLastKey(TsdbRepoT *repo, int64_t uid);
 
 // the TSDB repository info
 typedef struct STsdbRepoInfo {
diff --git a/src/tsdb/src/tsdbMain.c b/src/tsdb/src/tsdbMain.c
index 5da8d303d9a155d56519412c38212f4e11b18500..ca0065bf1e69c7816ffe280640def1e9a6f5bbae 100644
--- a/src/tsdb/src/tsdbMain.c
+++ b/src/tsdb/src/tsdbMain.c
@@ -367,6 +367,15 @@ int tsdbAlterTable(TsdbRepoT *pRepo, STableCfg *pCfg) {
   return 0;
 }
 
+TSKEY tsdbGetTableLastKey(TsdbRepoT *repo, int64_t uid) {
+  STsdbRepo *pRepo = (STsdbRepo *)repo;
+
+  STable *pTable = tsdbGetTableByUid(pRepo->tsdbMeta, uid);
+  if (pTable == NULL) return -1;
+
+  return TSDB_GET_TABLE_LAST_KEY(pTable);
+}
+
 int tsdbDropTable(TsdbRepoT *repo, STableId tableId) {
   if (repo == NULL) return -1;
   STsdbRepo *pRepo = (STsdbRepo *)repo;