Re: User-friendliness for DROP RESTRICT/CASCADE

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Joe Conway <mail(at)joeconway(dot)com>
Cc: pgsql-hackers(at)postgreSQL(dot)org, Rod Taylor <rbt(at)zort(dot)ca>
Subject: Re: User-friendliness for DROP RESTRICT/CASCADE
Date: 2002-06-26 22:30:08
Message-ID: 16383.1025130608@sss.pgh.pa.us
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Joe Conway <mail(at)joeconway(dot)com> writes:
> It would be nice if the recursive dependency checking function was
> available as an end user function too, so you could analyze dependencies
> before even trying to drop something, or even just to understand a
> database schema you've inherited from someone else.

It'd be a pretty trivial exercise to build something that looks at the
pg_depend entries and generates whatever kind of display you want.

David Kaplan reminded me that there is another UI issue to be
considered: when we *are* doing a DROP CASCADE, should the dropped
dependent objects be reported somehow? As it stands, Rod's patch emits
elog(NOTICE) messages in this case, but I am wondering whether that will
be seen as useful or merely annoying chatter.

regards, tom lane

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