Bug#23299 Some queries against INFORMATION_SCHEMA with subqueries fail

additional call of file->extra() method with HA_EXTRA_NO_CACHE parameter


mysql-test/r/information_schema.result:
  test result
mysql-test/t/information_schema.test:
  test case
sql/sql_show.cc:
  additional call of file->extra() method with HA_EXTRA_NO_CACHE parameter

mysql-test/r/information_schema.result

@@ -1269,3 +1269,13 @@ id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	PRIMARY	<derived2>	system	NULL	NULL	NULL	NULL	0	const row not found
 2	DERIVED	tables	ALL	NULL	NULL	NULL	NULL	2	
 drop view v1;
+create table t1 (f1 int(11));
+create table t2 (f1 int(11), f2 int(11));
+select table_name from information_schema.tables
+where table_schema = 'test' and table_name not in
+(select table_name from information_schema.columns
+where table_schema = 'test' and column_name = 'f3');
+table_name
+t1
+t2
+drop table t1,t2;

mysql-test/t/information_schema.test

@@ -987,4 +987,16 @@ explain select * from v1;
 explain select * from (select table_name from information_schema.tables) as a;
 drop view v1;
 
+#
+# Bug#23299 Some queries against INFORMATION_SCHEMA with subqueries fail
+#
+create table t1 (f1 int(11));
+create table t2 (f1 int(11), f2 int(11));
+
+select table_name from information_schema.tables
+where table_schema = 'test' and table_name not in
+(select table_name from information_schema.columns
+ where table_schema = 'test' and column_name = 'f3');
+drop table t1,t2;
+
 # End of 5.0 tests.

sql/sql_show.cc

@@ -3973,6 +3973,7 @@ bool get_schema_tables_result(JOIN *join)
 
       if (is_subselect) // is subselect
       {
+        table_list->table->file->extra(HA_EXTRA_NO_CACHE);
         table_list->table->file->extra(HA_EXTRA_RESET_STATE);
         table_list->table->file->delete_all_rows();
         free_io_cache(table_list->table);