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Fix for bug #18153 "ALTER/OPTIMIZE/REPAIR on transactional tables corrupt

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triggers".

Applying ALTER/OPTIMIZE/REPAIR TABLE statements to transactional table or to
table of any type on Windows caused disappearance of its triggers.
Bug was introduced in 5.0.19 by my fix for bug #13525 "Rename table does not
keep info of triggers" (see comment for sql_table.cc for more info).
.


mysql-test/r/trigger.result:
  Added test-case covering handling of triggers when one does ALTER TABLE which
  should move table to different database.
mysql-test/t/trigger.test:
  Added test-case covering handling of triggers when one does ALTER TABLE which
  should move table to different database.
sql/sql_table.cc:
  mysql_alter_table():
    Removal of strdup() which is no longer necessary allows us to preserve
    nice assumption that "(new_db != db || new_table != table_name) indicates
    that table will be renamed. So now we really can use this condition to
    avoid updating trigger definitions when table is not renamed.
    Note that we can't use (alter_info->flags & ALTER_RENAME) condition instead
    since it can be also true when we do "ALTER TABLE t1 RENAME TO t1".
sql/sql_trigger.cc:
  Table_triggers_list::change_table_name():
    Mentioned assumption that subject table is not renamed to itself in method
    description. Added DBUG_ASSERT() to catch wrong usage of this method.
mysql-test/r/trigger-trans.result:
  New BitKeeper file ``mysql-test/r/trigger-trans.result''
mysql-test/t/trigger-trans.test:
  New BitKeeper file ``mysql-test/t/trigger-trans.test''
This commit is contained in:
unknown
2006-03-24 14:58:18 +03:00
parent 4399da26b4
commit a389ec0b1b
6 changed files with 194 additions and 1 deletions
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31
mysql-test/r/trigger.result
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@ -860,6 +860,37 @@ trigger_schema trigger_name event_object_schema event_object_table action_statem
mysqltest t1_bi mysqltest t1 set @a:=new.id
drop trigger test.t1_bi;
ERROR HY000: Trigger does not exist
alter table t1 rename to test.t1;
ERROR HY000: Trigger in wrong schema
insert into t1 values (103);
select @a;
@a
103
select trigger_schema, trigger_name, event_object_schema,
event_object_table, action_statement from information_schema.triggers
where event_object_schema = 'test' or event_object_schema = 'mysqltest';
trigger_schema trigger_name event_object_schema event_object_table action_statement
mysqltest t1_bi mysqltest t1 set @a:=new.id
drop trigger test.t1_bi;
ERROR HY000: Trigger does not exist
alter table t1 rename to test.t1, add column val int default 0;
ERROR HY000: Trigger in wrong schema
insert into t1 values (104);
select @a;
@a
104
select trigger_schema, trigger_name, event_object_schema,
event_object_table, action_statement from information_schema.triggers
where event_object_schema = 'test' or event_object_schema = 'mysqltest';
trigger_schema trigger_name event_object_schema event_object_table action_statement
mysqltest t1_bi mysqltest t1 set @a:=new.id
show create table t1;
Table Create Table
t1 CREATE TABLE `t1` (
`id` int(11) default NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1
drop trigger test.t1_bi;
ERROR HY000: Trigger does not exist
drop trigger t1_bi;
drop table t1;
drop database mysqltest;