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-rw-r--r--sql/sql_union.cc1
1 files changed, 1 insertions, 0 deletions
diff --git a/sql/sql_union.cc b/sql/sql_union.cc
index 6ab2619e8e2..c119f1e0116 100644
--- a/sql/sql_union.cc
+++ b/sql/sql_union.cc
@@ -1858,6 +1858,7 @@ bool st_select_lex_unit::cleanup()
DBUG_RETURN(FALSE);
}
}
+ columns_are_renamed= false;
cleaned= 1;
for (SELECT_LEX *sl= first_select(); sl; sl= sl->next_select())