diff --git a/src/client/src/tscSQLParser.c b/src/client/src/tscSQLParser.c
index bcf43a1a8b01a1d07845defce56f68647f81259b..817fe3d3f78b01b05af652a278d4071c31c63476 100644
--- a/src/client/src/tscSQLParser.c
+++ b/src/client/src/tscSQLParser.c
@@ -1902,6 +1902,8 @@ int32_t addExprAndResultField(SSqlCmd* pCmd, SQueryInfo* pQueryInfo, int32_t col
         if (changeFunctionID(optr, &functionId) != TSDB_CODE_SUCCESS) {
           return TSDB_CODE_TSC_INVALID_SQL;
         }
+        tscInsertPrimaryTSSourceColumn(pQueryInfo, &index);
+        colIndex += 1;  // the first column is ts
 
         pExpr = tscSqlExprAppend(pQueryInfo, functionId, &index, resultType, resultSize, resultSize, false);
         addExprParams(pExpr, val, TSDB_DATA_TYPE_DOUBLE, sizeof(double), 0);