diff --git a/src/client/src/tscSQLParser.c b/src/client/src/tscSQLParser.c
index a81ad19e4fb5f753919297d9be3396ab058568fa..3dbd5d36bd86f8788b9363ff5af10b84decc2c08 100644
--- a/src/client/src/tscSQLParser.c
+++ b/src/client/src/tscSQLParser.c
@@ -1297,10 +1297,6 @@ SSqlExpr* doAddProjectCol(SQueryInfo* pQueryInfo, int32_t outputIndex, int32_t c
       pSchema->bytes, functionId == TSDB_FUNC_TAGPRJ);
 }
 
-void addRequiredTagColumn(STableMetaInfo* pTableMetaInfo, SColumnIndex* index) {
-
-}
-
 static void addProjectQueryCol(SQueryInfo* pQueryInfo, int32_t startPos, SColumnIndex* pIndex, tSQLExprItem* pItem) {
   SSqlExpr* pExpr = doAddProjectCol(pQueryInfo, startPos, pIndex->columnIndex, pIndex->tableIndex);
 
diff --git a/src/client/src/tscServer.c b/src/client/src/tscServer.c
index 8efe89d28ab497ea7a442b412845d9b54172dce6..f72f53c2b17f9bd5994c90951fd1b18df0dd3b54 100644
--- a/src/client/src/tscServer.c
+++ b/src/client/src/tscServer.c
@@ -544,8 +544,7 @@ int tscBuildSubmitMsg(SSqlObj *pSql, SSqlInfo *pInfo) {
 }
 
 /*
- * for meter query, simply return the size <= 1k
- * for metric query, estimate size according to meter tags
+ * for table query, simply return the size <= 1k
  */
 static int32_t tscEstimateQueryMsgSize(SSqlCmd *pCmd, int32_t clauseIndex) {
   const static int32_t MIN_QUERY_MSG_PKT_SIZE = TSDB_MAX_BYTES_PER_ROW * 5;
@@ -556,15 +555,7 @@ static int32_t tscEstimateQueryMsgSize(SSqlCmd *pCmd, int32_t clauseIndex) {
   size_t numOfExprs = tscSqlExprNumOfExprs(pQueryInfo);
   int32_t exprSize = sizeof(SSqlFuncMsg) * numOfExprs;
   
-  STableMetaInfo *pTableMetaInfo = tscGetMetaInfo(pQueryInfo, 0);
-
-  // meter query without tags values
-  if (!UTIL_TABLE_IS_SUPERTABLE(pTableMetaInfo)) {
-    return MIN_QUERY_MSG_PKT_SIZE + minMsgSize() + sizeof(SQueryTableMsg) + srcColListSize + exprSize;
-  }
-  
-  int32_t size = 4096;
-  return size;
+  return MIN_QUERY_MSG_PKT_SIZE + minMsgSize() + sizeof(SQueryTableMsg) + srcColListSize + exprSize + 4096;
 }
 
 static char *doSerializeTableInfo(SQueryTableMsg* pQueryMsg, SSqlObj *pSql, char *pMsg) {
diff --git a/src/client/src/tscUtil.c b/src/client/src/tscUtil.c
index c25e91a669689f225eeadae96cc65596d3616cef..bea61f12c4fe477231f620c5dedca976048aeedd 100644
--- a/src/client/src/tscUtil.c
+++ b/src/client/src/tscUtil.c
@@ -1701,6 +1701,12 @@ void tscClearTableMetaInfo(STableMetaInfo* pTableMetaInfo, bool removeFromCache)
   tfree(pTableMetaInfo->vgroupList);
   
   if (pTableMetaInfo->tagColList != NULL) {
+    size_t numOfTags = taosArrayGetSize(pTableMetaInfo->tagColList);
+    for(int32_t i = 0; i < numOfTags; ++i) { // todo do NOT use the allocated object
+      SColumn* pCol = taosArrayGetP(pTableMetaInfo->tagColList, i);
+      tfree(pCol);
+    }
+    
     taosArrayDestroy(pTableMetaInfo->tagColList);
     pTableMetaInfo->tagColList = NULL;
   }
diff --git a/src/inc/taosmsg.h b/src/inc/taosmsg.h
index 8dac73606d336ca376c0b5f70521285fb7d78344..9d16299380407f27c3368f848c2b91ad7232157a 100644
--- a/src/inc/taosmsg.h
+++ b/src/inc/taosmsg.h
@@ -626,7 +626,6 @@ typedef struct {
 typedef struct STableMetaMsg {
   int32_t       contLen;
   char          tableId[TSDB_TABLE_ID_LEN + 1];   // table id
-  char          stableId[TSDB_TABLE_ID_LEN + 1];  // stable name if it is created according to super table
   uint8_t       numOfTags;
   uint8_t       precision;
   uint8_t       tableType;
diff --git a/src/mnode/src/mgmtTable.c b/src/mnode/src/mgmtTable.c
index bfe357cf7c74069e5cb41f569f9129d3d26c1376..3e11bd5f1403f90653e2aa81ca7535cc8cd17027 100644
--- a/src/mnode/src/mgmtTable.c
+++ b/src/mnode/src/mgmtTable.c
@@ -1206,8 +1206,10 @@ void mgmtDropAllSuperTables(SDbObj *pDropDb) {
 
 static int32_t mgmtSetSchemaFromSuperTable(SSchema *pSchema, SSuperTableObj *pTable) {
   int32_t numOfCols = pTable->numOfColumns + pTable->numOfTags;
+  assert(numOfCols <= TSDB_MAX_COLUMNS);
+  
   for (int32_t i = 0; i < numOfCols; ++i) {
-    strncpy(pSchema->name, pTable->schema[i].name, TSDB_TABLE_ID_LEN);
+    strncpy(pSchema->name, pTable->schema[i].name, TSDB_COL_NAME_LEN);
     pSchema->type  = pTable->schema[i].type;
     pSchema->bytes = htons(pTable->schema[i].bytes);
     pSchema->colId = htons(pTable->schema[i].colId);
@@ -1679,7 +1681,6 @@ static int32_t mgmtDoGetChildTableMeta(SQueuedMsg *pMsg, STableMetaMsg *pMeta) {
     pMeta->numOfTags    = (int8_t)pTable->superTable->numOfTags;
     pMeta->numOfColumns = htons((int16_t)pTable->superTable->numOfColumns);
     pMeta->contLen      = sizeof(STableMetaMsg) + mgmtSetSchemaFromSuperTable(pMeta->schema, pTable->superTable);
-    strncpy(pMeta->stableId, pTable->superTable->info.tableId, tListLen(pMeta->stableId));
   } else {
     pMeta->sversion     = htons(pTable->sversion);
     pMeta->numOfTags    = 0;