diff --git a/src/tsdb/src/tsdbMeta.c b/src/tsdb/src/tsdbMeta.c
index 621be04e216683681f276ff6181a34ffc3613ba4..6cf4ef28d235182be22996c48de41440b1cdecd2 100644
--- a/src/tsdb/src/tsdbMeta.c
+++ b/src/tsdb/src/tsdbMeta.c
@@ -44,6 +44,7 @@ static int     tsdbRemoveTableFromStore(STsdbRepo *pRepo, STable *pTable);
 static int     tsdbRmTableFromMeta(STsdbRepo *pRepo, STable *pTable);
 static int     tsdbAdjustMetaTables(STsdbRepo *pRepo, int tid);
 static int     tsdbCheckTableTagVal(SKVRow *pKVRow, STSchema *pSchema);
+static int     tsdbInsertNewTableAction(STsdbRepo *pRepo, STable* pTable);
 
 // ------------------ OUTER FUNCTIONS ------------------
 int tsdbCreateTable(STsdbRepo *repo, STableCfg *pCfg) {
@@ -127,21 +128,16 @@ int tsdbCreateTable(STsdbRepo *repo, STableCfg *pCfg) {
   tsdbUnlockRepoMeta(pRepo);
 
   // Write to memtable action
-  // TODO: refactor duplicate codes
-  int   tlen = 0;
-  void *pBuf = NULL;
   if (newSuper || superChanged) {
-    tlen = tsdbGetTableEncodeSize(TSDB_UPDATE_META, super);
-    pBuf = tsdbAllocBytes(pRepo, tlen);
-    if (pBuf == NULL) goto _err;
-    void *tBuf = tsdbInsertTableAct(pRepo, TSDB_UPDATE_META, pBuf, super);
-    ASSERT(POINTER_DISTANCE(tBuf, pBuf) == tlen);
+    // add insert new super table action
+    if (tsdbInsertNewTableAction(pRepo, super) != 0) {
+      goto _err;
+    }
+  }
+  // add insert new table action
+  if (tsdbInsertNewTableAction(pRepo, table) != 0) {
+    goto _err;
   }
-  tlen = tsdbGetTableEncodeSize(TSDB_UPDATE_META, table);
-  pBuf = tsdbAllocBytes(pRepo, tlen);
-  if (pBuf == NULL) goto _err;
-  void *tBuf = tsdbInsertTableAct(pRepo, TSDB_UPDATE_META, pBuf, table);
-  ASSERT(POINTER_DISTANCE(tBuf, pBuf) == tlen);
 
   if (tsdbCheckCommit(pRepo) < 0) return -1;
 
@@ -382,7 +378,7 @@ int tsdbUpdateTableTagValue(STsdbRepo *repo, SUpdateTableTagValMsg *pMsg) {
     tdDestroyTSchemaBuilder(&schemaBuilder);
   }
 
-  // Chage in memory
+  // Change in memory
   if (pNewSchema != NULL) { // change super table tag schema
     TSDB_WLOCK_TABLE(pTable->pSuper);
     STSchema *pOldSchema = pTable->pSuper->tagSchema;
@@ -425,6 +421,21 @@ int tsdbUpdateTableTagValue(STsdbRepo *repo, SUpdateTableTagValMsg *pMsg) {
 }
 
 // ------------------ INTERNAL FUNCTIONS ------------------
+static int tsdbInsertNewTableAction(STsdbRepo *pRepo, STable* pTable) {
+  int   tlen = 0;
+  void *pBuf = NULL;
+
+  tlen = tsdbGetTableEncodeSize(TSDB_UPDATE_META, pTable);
+  pBuf = tsdbAllocBytes(pRepo, tlen);
+  if (pBuf == NULL) {
+    return -1;
+  }
+  void *tBuf = tsdbInsertTableAct(pRepo, TSDB_UPDATE_META, pBuf, pTable);
+  ASSERT(POINTER_DISTANCE(tBuf, pBuf) == tlen);
+
+  return 0;
+}
+
 STsdbMeta *tsdbNewMeta(STsdbCfg *pCfg) {
   STsdbMeta *pMeta = (STsdbMeta *)calloc(1, sizeof(*pMeta));
   if (pMeta == NULL) {
@@ -616,6 +627,7 @@ int16_t tsdbGetLastColumnsIndexByColId(STable* pTable, int16_t colId) {
   if (pTable->lastCols == NULL) {
     return -1;
   }
+  // TODO: use binary search instead
   for (int16_t i = 0; i < pTable->maxColNum; ++i) {
     if (pTable->lastCols[i].colId == colId) {
       return i;
@@ -740,10 +752,7 @@ void tsdbUpdateTableSchema(STsdbRepo *pRepo, STable *pTable, STSchema *pSchema,
   TSDB_WUNLOCK_TABLE(pCTable);
 
   if (insertAct) {
-    int   tlen = tsdbGetTableEncodeSize(TSDB_UPDATE_META, pCTable);
-    void *buf = tsdbAllocBytes(pRepo, tlen);
-    ASSERT(buf != NULL);
-    tsdbInsertTableAct(pRepo, TSDB_UPDATE_META, buf, pCTable);
+    ASSERT(tsdbInsertNewTableAction(pRepo, pCTable) == 0);
   }
 }