How to enable or disable keys in MySQL?
DISABLE KEYS to tell MySQL to stop updating nonunique indexes. Then use ALTER TABLE ENABLE KEYS to re-create missing indexes. MyISAM does this with a special algorithm that is much faster than inserting keys one by one, so disabling keys before performing bulk insert operations should give a considerable speedup.
How to disable PRIMARY KEY constraint in SQL Server?
I have a table with primary key in my MS SQL Server 2005 table. I would like to disable it. Now i get error: Violation of PRIMARY KEY constraint ‘PK_Name’. Cannot insert duplicate key in object ‘dbo.Table’.
How to execute disable keys on an InnoDB table?
There is a very good reason why you cannot execute DISABLE KEYS on an InnoDB table; InnoDB is not designed to use it, and MyISAM is. You will see a CREATE TABLE for a MyISAM table following by a write lock. Before all the bulk inserts are run, a call to ALTER TABLE DISABLE KEYS is done.
Do you need index privilege for disable keys?
DISABLE KEYS requires the INDEX privilege in addition to the privileges mentioned earlier. While the nonunique indexes are disabled, they are ignored for statements such as SELECT and EXPLAIN that otherwise would use them. No mention is ever made of InnoDB in context with ALTER TABLE
How to remove duplicate entry key in MySQL?
Edit your structure, remove both PRIMARY KEY definition and FOREIGN KEYS definitions. Or, if the table is now empty, simply drop it and re-create without PK and FKs. Import your data. SELECT song.*
How to unlock ALTER TABLE monster in MySQL?
INSERT /*!40000 ALTER TABLE `monster` ENABLE KEYS */; UNLOCK TABLES; That was news for me but ok, given the output form mysql –version everything looks fine to me: mysql Ver 14.14 Distrib 5.5.38, for debian-linux-gnu (x86_64) using readline 6.3 The table is locked (fine, it’s just me on the dev mashine).