From 35ca8b97ac6a4a1897968b48cd86fc1170221981 Mon Sep 17 00:00:00 2001
From: Vladimir <vdimir@yandex-team.ru>
Date: Wed, 7 Jul 2021 12:48:39 +0300
Subject: [PATCH] Set distinct_on_expression_list to null white transforming to
 limit_by

---
 src/Parsers/ParserSelectQuery.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/Parsers/ParserSelectQuery.cpp b/src/Parsers/ParserSelectQuery.cpp
index 255595caa0e..b1f7570878f 100644
--- a/src/Parsers/ParserSelectQuery.cpp
+++ b/src/Parsers/ParserSelectQuery.cpp
@@ -367,6 +367,7 @@ bool ParserSelectQuery::parseImpl(Pos & pos, ASTPtr & node, Expected & expected)
         /// Transform `DISTINCT ON expr` to `LIMIT 1 BY expr`
         limit_by_expression_list = distinct_on_expression_list;
         limit_by_length = std::make_shared<ASTLiteral>(Field{UInt8(1)});
+        distinct_on_expression_list = nullptr;
     }
 
     /// Because TOP n in totally equals LIMIT n