I have a MySQL database with a few tables and triggers. A process was trying to drop one of the triggers and it failed with the following error:
Malformed file type header in file 'trigger_name.TRN'
I tried to drop the trigger manually, but obviously got the same error. So I went ahead and deleted the .TRN
file itself (was that a bad idea?).
After deleting the .TRN
file, the trigger still appears in information_schema.TRIGGERS
. If I try to drop it I get error "Trigger does not exist". If I try to create another trigger with the same name, table and event manipulation I get error "Trigger already exists".
I don't know what else to do. How can I really delete this trigger so that it can be created again?
MySQL version is 5.0.22 and all tables are MyISAM.
SHOW CREATE TABLE
outputs:
CREATE TABLE `cash_operation` (
`id` int(11) NOT NULL auto_increment,
`amount` decimal(16,8) NOT NULL default '0.00000000',
`comment` varchar(500) NOT NULL default '',
`reason_id` int(11) NOT NULL default '-1',
`date` datetime NOT NULL default '1980-01-01 00:00:00',
`reconciliation_number` int(11) NOT NULL default '-1',
`reason_desc` varchar(250) NOT NULL default '',
`automatic` tinyint(1) NOT NULL default '0',
`employee_id` int(11) NOT NULL default '-1',
`employee_code` varchar(250) NOT NULL default '',
`employee_name` varchar(250) NOT NULL default '',
`payed_employee_id` int(11) NOT NULL default '-1',
PRIMARY KEY (`id`),
KEY `cash_operation_reason_id` USING BTREE (`reason_id`),
KEY `cash_operation_reconciliation_number` USING BTREE (`reconciliation_number`),
KEY `cash_operation_automatic` USING BTREE (`automatic`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8
SELECT @@global.datadir;
results in error "Unkown system variable 'datadir'"
Best Answer
Based on the suggestion I gave in the chat room, here is my answer
CREATE TABLE cash_op LIKE cash_operation;
rename cash_op.MYD cash_op.MYX
copy cash_operation.MYD cash_op.MYD
REPAIR TABLE cash_op;
ALTER TABLE cash_operation RENAME cash_op_old;
ALTER TABLE cash_op RENAME cash_operation;
You said in the chat room :
Awesome, that worked! You can post it as the answer.
I am glad you gave it a try and it worked for you !!!
BTW you can drop the old table with
DROP TABLE cash_op_old;