Re: Adding foreign key performance

From: Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us>
To: "John K(dot) Herreshoff" <jkherr(at)centurytel(dot)net>
Cc: Stephan Szabo <sszabo(at)megazone(dot)bigpanda(dot)com>, Jeff <threshar(at)torgo(dot)978(dot)org>, pgsql-performance(at)postgresql(dot)org
Subject: Re: Adding foreign key performance
Date: 2003-10-28 19:13:57
Message-ID: 200310281913.h9SJDvN28840@candle.pha.pa.us
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John K. Herreshoff wrote:
> That did not take long... about 13 minutes to reload the tables from an *.mdb
> file, and a second or two for each of the 'alter table foo add foreign
> key...' lines. I tried to drop a 'referencing' table, and the database would
> not let me, said that something depended on it ;o)
>
> Is there some way to name the foreign key so that it can be dropped later, or
> is there a way to drop the foreign key using information already in the
> database?

You have to use ALTER TABLE DROP CONSTRAINT perhaps.

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