Hi, Nirbhay! On Nov 29, [email protected] wrote: > revision-id: 020e569dc7f638b6add8a043b1c9ff308f688ffa > parent(s): 7b55b67de5fdfe91283357fe6c7ccc3f9e355925 > committer: Nirbhay Choubey > branch nick: b4412 > timestamp: 2014-11-29 19:05:32 -0500 > message: > > MDEV-4412 : SLOW QUERY LOG - add affected rows (UPDATE / DELETE) in slow > query log > > Added Rows_affected to slow query log & mysql.slow_log table. > > diff --git a/scripts/mysql_system_tables_fix.sql > b/scripts/mysql_system_tables_fix.sql > index b9bb59c..aeaf919 100644 > --- a/scripts/mysql_system_tables_fix.sql > +++ b/scripts/mysql_system_tables_fix.sql > @@ -249,7 +249,8 @@ SET GLOBAL general_log = @old_log_state; > SET @old_log_state = @@global.slow_query_log; > SET GLOBAL slow_query_log = 'OFF'; > ALTER TABLE slow_log > - ADD COLUMN thread_id BIGINT(21) UNSIGNED NOT NULL AFTER sql_text; > + ADD COLUMN thread_id BIGINT(21) UNSIGNED NOT NULL AFTER sql_text, > + ADD COLUMN rows_affected INTEGER NOT NULL AFTER thread_id; > ALTER TABLE slow_log > MODIFY start_time TIMESTAMP(6) NOT NULL DEFAULT CURRENT_TIMESTAMP ON > UPDATE CURRENT_TIMESTAMP, > MODIFY user_host MEDIUMTEXT NOT NULL,
I am not sure it'll work. It would work if you need to upgrade a table that has neither thread_id nor rows_affected column to the latest version. So that ALTER would've been an acceptable solution if both thread_id and rows_affected were added in the same MariaDB version. But they were not and there are quite a few MariaDB releases where slow_log table has thread_id and doesn't have rows_affected. I suspect in that case ALTER will fail. But if you'd like you can try a small test case and see whether such an ALTER will add a second column even if the first one already exists. Better add rows_affected in a separate ALTER TABLE statement. Regards, Sergei _______________________________________________ Mailing list: https://launchpad.net/~maria-developers Post to : [email protected] Unsubscribe : https://launchpad.net/~maria-developers More help : https://help.launchpad.net/ListHelp
