From 8a2659940534703ce4f8d53f6ba9a8ffa226ce6d Mon Sep 17 00:00:00 2001
From: Alex Duan <417921451@qq.com>
Date: Tue, 10 May 2022 14:40:00 +0800
Subject: [PATCH] fix(query): groupby operator on proj query force set row to
 one

---
 src/query/src/qExecutor.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/query/src/qExecutor.c b/src/query/src/qExecutor.c
index 54099e24ef..6156ff9c10 100644
--- a/src/query/src/qExecutor.c
+++ b/src/query/src/qExecutor.c
@@ -7953,6 +7953,14 @@ SOperatorInfo* createGroupbyOperatorInfo(SQueryRuntimeEnv* pRuntimeEnv, SOperato
   pInfo->binfo.pCtx = createSQLFunctionCtx(pRuntimeEnv, pExpr, numOfOutput, &pInfo->binfo.rowCellInfoOffset,
                                            pRuntimeEnv->resultInfo.capacity);
 
+  // if have proj column, must set output row is 1
+  for (int32_t i = 0; i < numOfOutput; i++) {
+    if (pInfo->binfo.pCtx[i].functionId == TSDB_FUNC_PRJ) {
+      pInfo->binfo.pCtx[i].param[0].i64   = 1;
+      pInfo->binfo.pCtx[i].param[0].nType = TSDB_DATA_TYPE_BIGINT;
+    }
+  }
+
   SQueryAttr *pQueryAttr = pRuntimeEnv->pQueryAttr;
 
   pQueryAttr->resultRowSize = (pQueryAttr->resultRowSize *
-- 
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