From f929187e63223a2fb0e16bbe8c6ed75daa14c05e Mon Sep 17 00:00:00 2001
From: Xiaoyu Wang <xiaoyuwang@taosdata.com>
Date: Fri, 29 Jul 2022 18:30:03 +0800
Subject: [PATCH] enh: last function optimize

---
 source/libs/planner/src/planOptimizer.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/source/libs/planner/src/planOptimizer.c b/source/libs/planner/src/planOptimizer.c
index f64ea71ccb..577266a697 100644
--- a/source/libs/planner/src/planOptimizer.c
+++ b/source/libs/planner/src/planOptimizer.c
@@ -1061,6 +1061,9 @@ static int32_t pushDownCondOptimize(SOptimizeContext* pCxt, SLogicSubplan* pLogi
 }
 
 static bool sortPriKeyOptIsPriKeyOrderBy(SNodeList* pSortKeys) {
+  if (1 != LIST_LENGTH(pSortKeys)) {
+    return false;
+  }
   SNode* pNode = ((SOrderByExprNode*)nodesListGetNode(pSortKeys, 0))->pExpr;
   return (QUERY_NODE_COLUMN == nodeType(pNode) ? (PRIMARYKEY_TIMESTAMP_COL_ID == ((SColumnNode*)pNode)->colId) : false);
 }
-- 
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