diff --git a/src/tsdb/inc/tsdbMain.h b/src/tsdb/inc/tsdbMain.h
index 5f6d72128d7002a82f17a5dcb3ac7c70eac1e395..6187146dd0fbf9b4d316495a0a912043ec82d256 100644
--- a/src/tsdb/inc/tsdbMain.h
+++ b/src/tsdb/inc/tsdbMain.h
@@ -285,6 +285,16 @@ typedef struct {
 
 STsdbMeta* tsdbNewMeta(STsdbCfg* pCfg);
 void       tsdbFreeMeta(STsdbMeta* pMeta);
+int        tsdbOpenMeta(STsdbRepo* pRepo);
+int        tsdbCloseMeta(STsdbRepo* pRepo);
+STSchema*  tsdbGetTableSchema(STable* pTable);
+STable*    tsdbGetTableByUid(STsdbMeta* pMeta, uint64_t uid);
+STSchema*  tsdbGetTableSchemaByVersion(STable* pTable, int16_t version);
+STSchema*  tsdbGetTableTagSchema(STable* pTable);
+int        tsdbUpdateTable(STsdbMeta* pMeta, STable* pTable, STableCfg* pCfg);
+int        tsdbWLockRepoMeta(STsdbRepo* pRepo);
+int        tsdbRLockRepoMeta(STsdbRepo* pRepo);
+int        tsdbUnlockRepoMeta(STsdbRepo* pRepo);
 
 // ------------------ tsdbBuffer.c
 STsdbBufPool* tsdbNewBufPool();
diff --git a/src/tsdb/src/tsdbMain.c b/src/tsdb/src/tsdbMain.c
index ef1a4af064930a91faa11f49ab6d2952d9819fc8..022923e4b2316d7f5fb9838a0a8d55e3c965bdee 100644
--- a/src/tsdb/src/tsdbMain.c
+++ b/src/tsdb/src/tsdbMain.c
@@ -1038,6 +1038,11 @@ _err:
   return -1;
 }
 
+static char *getTSTupleKey(const void *data) {
+  SDataRow row = (SDataRow)data;
+  return POINTER_SHIFT(row, TD_DATA_ROW_HEAD_SIZE);
+}
+
 #if 0
 **
  * Set the default TSDB configuration
diff --git a/src/tsdb/src/tsdbMeta.c b/src/tsdb/src/tsdbMeta.c
index 3d11383e5b3a425cb21d536483fe414afad786ab..d9b054ecbbb0e2b4c850bb0f70a6cec1504faaf4 100644
--- a/src/tsdb/src/tsdbMeta.c
+++ b/src/tsdb/src/tsdbMeta.c
@@ -23,6 +23,30 @@
 #define TSDB_SUPER_TABLE_SL_LEVEL 5
 #define DEFAULT_TAG_INDEX_COLUMN 0
 
+static int     tsdbCompareSchemaVersion(const void *key1, const void *key2);
+static int     tsdbRestoreTable(void *pHandle, void *cont, int contLen);
+static void    tsdbOrgMeta(void *pHandle);
+static char *  getTagIndexKey(const void *pData);
+static STable *tsdbNewTable(STableCfg *pCfg, bool isSuper);
+static void    tsdbFreeTable(STable *pTable);
+static int     tsdbUpdateTableTagSchema(STable *pTable, STSchema *newSchema);
+static int     tsdbAddTableToMeta(STsdbRepo *pRepo, STable *pTable, bool addIdx);
+static void    tsdbRemoveTableFromMeta(STsdbRepo *pRepo, STable *pTable, bool rmFromIdx);
+static int     tsdbAddTableIntoIndex(STsdbMeta *pMeta, STable *pTable);
+static int     tsdbRemoveTableFromIndex(STsdbMeta *pMeta, STable *pTable);
+static int     tsdbInitTableCfg(STableCfg *config, ETableType type, uint64_t uid, int32_t tid);
+static int     tsdbTableSetSchema(STableCfg *config, STSchema *pSchema, bool dup);
+static int     tsdbTableSetName(STableCfg *config, char *name, bool dup);
+static int     tsdbTableSetTagSchema(STableCfg *config, STSchema *pSchema, bool dup);
+static int     tsdbTableSetSName(STableCfg *config, char *sname, bool dup);
+static int     tsdbTableSetSuperUid(STableCfg *config, uint64_t uid);
+static int     tsdbTableSetTagValue(STableCfg *config, SKVRow row, bool dup);
+static int     tsdbTableSetStreamSql(STableCfg *config, char *sql, bool dup);
+static void *  tsdbEncodeTableName(void *buf, tstr *name);
+static void *  tsdbDecodeTableName(void *buf, tstr **name);
+static void *  tsdbEncodeTable(void *buf, STable *pTable);
+static void *  tsdbDecodeTable(void *buf, STable **pRTable);
+
 // ------------------ OUTER FUNCTIONS ------------------
 int tsdbCreateTable(TSDB_REPO_T *repo, STableCfg *pCfg) {
   STsdbRepo *pRepo = (STsdbRepo *)repo;
@@ -397,11 +421,6 @@ int tsdbUpdateTable(STsdbMeta *pMeta, STable *pTable, STableCfg *pCfg) {
   return TSDB_CODE_SUCCESS;
 }
 
-char *getTSTupleKey(const void *data) {
-  SDataRow row = (SDataRow)data;
-  return POINTER_SHIFT(row, TD_DATA_ROW_HEAD_SIZE);
-}
-
 int tsdbWLockRepoMeta(STsdbRepo *pRepo) {
   int code = pthread_rwlock_wrlock(&(pRepo->tsdbMeta->rwLock));
   if (code != 0) {