* Yan Cheng CHEOK wrote:
I was wondering, is there any good way to drop a constraint? Currently, I am
making assumption on the check constraint name.
ALTER TABLE backup_table ADD CHECK (fk_lot_id = 99);
If I want to drop the above CHECK constraint, I will do
ALTER TABLE backup_table DROP CONSTRAINT backup_table_fk_lot_id_check; (I
assume the constraint name will be backup_table_fk_lot_id_check)
Is there any more robust way?
Name your constraints:
ALTER TABLE backup_table ADD CONSTRAINT lot_id_ck CHECK (fk_lot_id = 99)
Alternatively, you can get a list of constraints for your table from the
catalog:
SELECT conname
FROM pg_constraint
WHERE conrelid = 'backup_table'::regclass
You may have to add more conditions to the query.
--
Christian
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