Kevin Kempter <[email protected]> writes:
> we have a few not null constraints we want to drop on very large tables.
> Unfortunately the drop's are taking hours. Is there a way to drop a not null
> constraint via the system catalogs?
Dropping a NOT NULL constraint is a trivial operation. The problem is
probably that you are blocked waiting to get a lock on the table.
Look for idle-in-transaction sessions that are holding locks on the
target table.
regards, tom lane
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