Re: pg_depend

From: Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us>
To: Hiroshi Inoue <Inoue(at)tpf(dot)co(dot)jp>
Cc: Peter Eisentraut <peter_e(at)gmx(dot)net>, Alex Pilosov <alex(at)pilosoft(dot)com>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: pg_depend
Date: 2001-07-18 02:29:54
Message-ID: 200107180229.f6I2TsD24825@candle.pha.pa.us
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> Then we have an pg_depend entry e.g.
>
> pg_class_relid
> oid of the view_a
> pg_class_relid
> oid of the table a
> 'a' the name of the table
>
> and so on.
>
> drop table a; (unadorned drop).
>
> Then the above entry would be changed to
>
> pg_class_relid(unchanged)
> oid of the view_s(unchagned)
> pg_class_relid(unchanged)
> InvalidOid
> 'a' the name of the table(unchanged)
>
> create table a (...);
>
> Then the pg_depend entry would be
>
> pg_class_relid(unchanged)
> oid of the view_s(unchagned)
> pg_class_relid(unchanged)
> the oid of the new table a
> 'a' the name of the table(unchanged)

So you want to keep the name of the referenced object in case it is
dropped. Makes sense.

--
Bruce Momjian | http://candle.pha.pa.us
pgman(at)candle(dot)pha(dot)pa(dot)us | (610) 853-3000
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