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Bug#24630 Subselect query crashes mysqld

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The crash happens because second filling of the same I_S table happens in
case of subselect with order by. table->sort.io_cache previously allocated
in create_sort_index() is deleted during second filling
(function get_schema_tables_result). There are two places where
I_S table can be filled: JOIN::exec and create_sort_index().
To fix the bug we should check if the table was already filled
in one of these places and skip processing of the table in second.
This commit is contained in:
gluh@mysql.com/eagle.(none)
2007-02-12 16:06:14 +04:00
parent 0583c7c524
commit 47e537b47c
7 changed files with 93 additions and 13 deletions
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3
sql/mysql_priv.h
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@ -932,7 +932,8 @@ int fill_schema_user_privileges(THD *thd, TABLE_LIST *tables, COND *cond);
int fill_schema_schema_privileges(THD *thd, TABLE_LIST *tables, COND *cond);
int fill_schema_table_privileges(THD *thd, TABLE_LIST *tables, COND *cond);
int fill_schema_column_privileges(THD *thd, TABLE_LIST *tables, COND *cond);
bool get_schema_tables_result(JOIN *join);
bool get_schema_tables_result(JOIN *join,
enum enum_schema_table_state executed_place);
#define is_schema_db(X) \
!my_strcasecmp(system_charset_info, information_schema_name.str, (X))