Commit 1ae9f3b9 authored by unknown's avatar unknown
Browse files

Bug#22413 EXPLAIN SELECT FROM view with ORDER BY yield server crash 

disable filling of I_S tables for EXPLAIN


mysql-test/r/information_schema.result:
  Bug#22413 EXPLAIN SELECT FROM view with ORDER BY yield server crash
  test case
mysql-test/t/information_schema.test:
  Bug#22413 EXPLAIN SELECT FROM view with ORDER BY yield server crash
  test case
parent e139c57f

mysql-test/r/information_schema.result

+15 −0
Original line number Diff line number Diff line
@@ -1254,3 +1254,18 @@ COLUMN_NAME MD5(COLUMN_DEFAULT) LENGTH(COLUMN_DEFAULT) COLUMN_DEFAULT=get_value( 
fld1	7cf7a6782be951a1f2464a350da926a5	65532	1

DROP TABLE bug23037;

DROP FUNCTION get_value;

create view v1 as

select table_schema as object_schema,

table_name   as object_name,

table_type   as object_type

from information_schema.tables

order by object_schema;

explain select * from v1;

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	Using filesort

explain select * from (select table_name from information_schema.tables) as a;

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;

mysql-test/t/information_schema.test

+14 −0
Original line number Diff line number Diff line
@@ -973,4 +973,18 @@ DROP FUNCTION get_value; 








#

# Bug#22413: EXPLAIN SELECT FROM view with ORDER BY yield server crash

#

create view v1 as

select table_schema as object_schema,

       table_name   as object_name,

       table_type   as object_type

from information_schema.tables

order by object_schema;

explain select * from v1;

explain select * from (select table_name from information_schema.tables) as a;

drop view v1;



# End of 5.0 tests.

sql/sql_select.cc

+2 −0
Original line number Diff line number Diff line
@@ -1471,6 +1471,7 @@ JOIN::exec() 
  curr_join->examined_rows= 0;



  if ((curr_join->select_lex->options & OPTION_SCHEMA_TABLE) &&

      !thd->lex->describe &&

      get_schema_tables_result(curr_join))

  {

    DBUG_VOID_RETURN;
@@ -12278,6 +12279,7 @@ create_sort_index(THD *thd, JOIN *join, ORDER *order, 


  /* Fill schema tables with data before filesort if it's necessary */

  if ((join->select_lex->options & OPTION_SCHEMA_TABLE) &&

      !thd->lex->describe &&

      get_schema_tables_result(join))

    goto err;