diff --git a/src/client/src/tscSubquery.c b/src/client/src/tscSubquery.c
index 5c5b725ea2cb59b15aa970cefab062841159f5d0..020a1b36063fabc158642101bc7cac4de8c30a67 100644
--- a/src/client/src/tscSubquery.c
+++ b/src/client/src/tscSubquery.c
@@ -1032,55 +1032,6 @@ void tscJoinQueryCallback(void* param, TAOS_RES* tres, int code) {
 /////////////////////////////////////////////////////////////////////////////////////////
 static void tscRetrieveDataRes(void *param, TAOS_RES *tres, int code);
 
-//static void ddx(TAOS* taos) {
-//
-//  SSqlCmd* pCmd = &pSql->cmd;
-//
-//  tscPartiallyFreeSqlObj(pSql);
-////  tscTrace("continue parse sql: %s", pSql->cmd.curSql);
-//
-//  SQueryInfo* pQueryInfo = NULL;
-//  int32_t code = tscGetQueryInfoDetailSafely(pCmd, pCmd->clauseIndex, &pQueryInfo);
-//  assert(code == TSDB_CODE_SUCCESS);
-//
-//  STableMetaInfo* pTableMetaInfo = tscGetMetaInfo(pQueryInfo, 0);
-//
-//  if (UTIL_TABLE_IS_SUPERTABLE(pTableMetaInfo)) {  // return the tableId & tag
-//    SSchema      s = {0};
-//    SColumnIndex index = {0};
-//
-//    size_t numOfTags = taosArrayGetSize(pTableMetaInfo->tagColList);
-//    for (int32_t i = 0; i < numOfTags; ++i) {
-//      SColumn* c = taosArrayGetP(pTableMetaInfo->tagColList, i);
-//      index = (SColumnIndex){.tableIndex = 0, .columnIndex = c->colIndex.columnIndex};
-//
-//      SSchema* pTagSchema = tscGetTableTagSchema(pTableMetaInfo->pTableMeta);
-//      s = pTagSchema[c->colIndex.columnIndex];
-//
-//      int16_t bytes = 0;
-//      int16_t type = 0;
-//      int16_t inter = 0;
-//
-//      getResultDataInfo(s.type, s.bytes, TSDB_FUNC_TID_TAG, 0, &type, &bytes, &inter, 0, 0);
-//
-//      s.type = type;
-//      s.bytes = bytes;
-////      pSupporter->tagSize = s.bytes;
-//    }
-//
-//    // set get tags query type
-//    TSDB_QUERY_SET_TYPE(pQueryInfo->type, TSDB_QUERY_TYPE_TAG_FILTER_QUERY);
-//
-//    tscAddSpecialColumnForSelect(pQueryInfo, 0, TSDB_FUNC_TID_TAG, &index, &s, TSDB_COL_TAG);
-//    size_t numOfCols = taosArrayGetSize(pQueryInfo->colList);
-//
-//    tscTrace( "%p vgroupIndex:%d, type:%d, tid_tag query to retrieve (tableId, tags), "
-//        "exprInfo:%d, colList:%d, fieldsInfo:%d, name:%s",
-//        pSql, pTableMetaInfo->vgroupIndex, pQueryInfo->type, tscSqlExprNumOfExprs(pQueryInfo),
-//        numOfCols, pQueryInfo->fieldsInfo.numOfOutput, pQueryInfo->pTableMetaInfo[0]->name);
-//  }
-//}
-
 static SSqlObj *tscCreateSqlObjForSubquery(SSqlObj *pSql, SRetrieveSupport *trsupport, SSqlObj *prevSqlObj);
 
 // todo merge with callback