Re: probelm with alter table add constraint......

Tom Lane-2 wrote:
>
> "Albe Laurenz" <laurenz.albe@wien.gv.at> writes:
>> roopasatish wrote:
>>> I have an issue with the add foreign key constraint which
>>> goes for waiting and locks other queries as well.
>>>
>>> ALTER TABLE ONLY holding_positions ADD CONSTRAINT
>>> holding_positions_stock_id_fkey FOREIGN KEY (stock_id)
>>> REFERENCES stocks (stock_id) MATCH SIMPLE
>>> ON UPDATE NO ACTION ON DELETE NO ACTION;
>>>
>>> The holding_positions table has no data in it as yet.
>
>> Look in pg_catalog.pg_locks for a second transaction that
>> holds a lock on the table holding_positions.
>
> This statement also needs to get lock on the referenced table "stocks".
> An open transaction that's referenced either table will block it.
>
>             regards, tom lane
>
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I can't lock the table 'stocks' as its used continuously by many users. Is
there a way to run the constraint in a background without affecting the
users using the database.

Thanks a lot in advance
Roopa
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