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Modify UNIQUE constraint
Thank you, very helpfull. I used DROP KEY instead of DROP INDEX and it worked. Using SHOW CREATE TABLE I noted that unique key name don't match with constraint name used in ADD CONSTRAINT clause, but with 'field1' (I guess it's generated internally). I see that is because I used ALTER TABLE... -
Modify UNIQUE constraint
I've tryed, but ALTER TABLE MyTable DROP CONSTRAINT UN_MyTable ; raise a syntax error. I don't find any "DROP CONSTRAINT" clause in ALTER TABLE syntax in MySql documentation. Where I'm wrong? -
Modify UNIQUE constraint
I have an InnoDb table with a named UNIQUE CONSTRAINT. The constraint has been created with an ALTER TABLE script: ALTER TABLE MyTable ADD CONSTRAINT UN_MyTable UNIQUE (field1); Now I need to add field2 to the constraint with an ALTER script to update old databases (I can't drop and...
