From 629f317d7d836a9563cb9101fff02880af78f0d9 Mon Sep 17 00:00:00 2001
From: Igor Nikonov <igor@clickhouse.com>
Date: Thu, 15 Dec 2022 20:01:50 +0000
Subject: [PATCH] Fix for full sorting merge join

---
 .../QueryPlan/Optimizations/removeRedundantOrderBy.cpp    | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/Processors/QueryPlan/Optimizations/removeRedundantOrderBy.cpp b/src/Processors/QueryPlan/Optimizations/removeRedundantOrderBy.cpp
index d5f4b7105d6..d8ddeca636b 100644
--- a/src/Processors/QueryPlan/Optimizations/removeRedundantOrderBy.cpp
+++ b/src/Processors/QueryPlan/Optimizations/removeRedundantOrderBy.cpp
@@ -1,8 +1,10 @@
 #include <AggregateFunctions/AggregateFunctionFactory.h>
+#include <Interpreters/FullSortingMergeJoin.h>
 #include <Processors/QueryPlan/AggregatingStep.h>
 #include <Processors/QueryPlan/ExpressionStep.h>
 #include <Processors/QueryPlan/FillingStep.h>
 #include <Processors/QueryPlan/ITransformingStep.h>
+#include <Processors/QueryPlan/JoinStep.h>
 #include <Processors/QueryPlan/LimitByStep.h>
 #include <Processors/QueryPlan/LimitStep.h>
 #include <Processors/QueryPlan/Optimizations/Optimizations.h>
@@ -268,6 +270,12 @@ private:
 
             if (typeid_cast<const UnionStep *>(step))
                 return false;
+
+            if (const auto * join_step = typeid_cast<const JoinStep *>(step); join_step)
+            {
+                if (typeid_cast<const FullSortingMergeJoin *>(join_step->getJoin().get()))
+                    return false;
+            }
         }
 
         return true;