From 562f6ce245a524635bc6ce6fde251792bed921a2 Mon Sep 17 00:00:00 2001
From: Haojun Liao <hjliao@taosdata.com>
Date: Fri, 11 Sep 2020 11:22:45 +0800
Subject: [PATCH] [td-1416]

---
 src/client/src/tscSQLParser.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/client/src/tscSQLParser.c b/src/client/src/tscSQLParser.c
index eaf2692e7e..e4654efe1c 100644
--- a/src/client/src/tscSQLParser.c
+++ b/src/client/src/tscSQLParser.c
@@ -5231,7 +5231,8 @@ static int32_t doUpdateSqlFunctionForColPrj(SQueryInfo* pQueryInfo) {
   
   for (int32_t i = 0; i < size; ++i) {
     SSqlExpr* pExpr = tscSqlExprGet(pQueryInfo, i);
-    if (pExpr->functionId == TSDB_FUNC_PRJ) {
+
+    if (pExpr->functionId == TSDB_FUNC_PRJ && (!TSDB_COL_IS_UD_COL(pExpr->colInfo.flag))) {
       bool qualifiedCol = false;
       for (int32_t j = 0; j < pQueryInfo->groupbyExpr.numOfGroupCols; ++j) {
         SColIndex* pColIndex = taosArrayGet(pQueryInfo->groupbyExpr.columnInfo, j);
-- 
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