[td-5190]<fix>: fix the bug in stddev query with fill clause.

src/client/src/tscSubquery.c

@@ -2287,6 +2287,7 @@ int32_t tscHandleFirstRoundStableQuery(SSqlObj *pSql) {
 
   SArray* pColList = pNewQueryInfo->colList;
   pNewQueryInfo->colList = NULL;
+  pNewQueryInfo->fillType = TSDB_FILL_NONE;
 
   tscClearSubqueryInfo(pCmd);
   tscFreeSqlResult(pSql);

src/query/src/qSqlParser.c

@@ -146,7 +146,8 @@ tSqlExpr *tSqlExprCreateIdValue(SStrToken *pToken, int32_t optrType) {
     pSqlExpr->type    = SQL_NODE_VALUE;
     pSqlExpr->flags  |= 1 << EXPR_FLAG_NS_TIMESTAMP;
   } else if (optrType == TK_VARIABLE) {
-    // use nanosecond by default TODO set value after getting database precision
+    // use nanosecond by default
+    // TODO set value after getting database precision
     int32_t ret = parseAbsoluteDuration(pToken->z, pToken->n, &pSqlExpr->value.i64, TSDB_TIME_PRECISION_NANO);
     if (ret != TSDB_CODE_SUCCESS) {
       terrno = TSDB_CODE_TSC_SQL_SYNTAX_ERROR;