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-rw-r--r--sql/sql_derived.cc2
1 files changed, 1 insertions, 1 deletions
diff --git a/sql/sql_derived.cc b/sql/sql_derived.cc
index d1a232c35b6..ced3e3d4a98 100644
--- a/sql/sql_derived.cc
+++ b/sql/sql_derived.cc
@@ -71,7 +71,7 @@ int mysql_derived(THD *thd, LEX *lex, SELECT_LEX_UNIT *unit, TABLE_LIST *t)
TABLE_LIST *tables= (TABLE_LIST *)sl->table_list.first;
TMP_TABLE_PARAM tmp_table_param;
bool is_union= sl->next_select() && sl->next_select()->linkage == UNION_TYPE;
- bool is_subsel= sl->first_inner_unit();
+ bool is_subsel= sl->first_inner_unit() ? 1: 0;
SELECT_LEX_NODE *save_current_select= lex->current_select;
DBUG_ENTER("mysql_derived");