mirror/mariadb
1
0
Fork 0
mirror of https://github.com/MariaDB/server.git synced 2025-01-29 10:14:19 +01:00
Code Issues Projects Releases Packages Wiki Activity Actions

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

Browse source 
disable filling of I_S tables for EXPLAIN
This commit is contained in:
gluh@mysql.com/gluh.(none) 2006-11-21 13:45:01 +04:00
parent bcfed657e7
commit ff38409128
3 changed files with 31 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

15
mysql-test/r/information_schema.result
View file

@ -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;

14
mysql-test/t/information_schema.test
View file

@ -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.

2
sql/sql_select.cc
View file

@ -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;