From d31ee64da68a8fee9334c7b0bcab98cb636af36f Mon Sep 17 00:00:00 2001
From: Sergei Golubchik <serg@mariadb.org>
Date: Mon, 15 Jan 2018 01:23:30 +0100
Subject: [PATCH] compiler warning

---
 sql/item_subselect.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sql/item_subselect.cc b/sql/item_subselect.cc
index 90f2bd5b9eb..46d41fd61e3 100644
--- a/sql/item_subselect.cc
+++ b/sql/item_subselect.cc
@@ -4927,7 +4927,7 @@ int subselect_hash_sj_engine::exec()
 
     if (has_covering_null_row)
     {
-      DBUG_ASSERT(count_partial_match_columns = field_count);
+      DBUG_ASSERT(count_partial_match_columns == field_count);
       count_pm_keys= 0;
     }
     else if (has_covering_null_columns)