From: | Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> |
---|---|
To: | Rod Taylor <rbt(at)zort(dot)ca> |
Cc: | PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org> |
Subject: | Re: Unique and Primary Key Constraints |
Date: | 2002-07-13 04:20:36 |
Message-ID: | 200207130420.g6D4Kbx18208@candle.pha.pa.us |
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Lists: | pgsql-hackers |
Rod Taylor wrote:
> I'm going to change the pg_dump command to pull these constraints out of
> pg_constaint where possible, creating the appropriate alter table add
> constraint command (see primary key).
>
>
> Should unique constraints created with 'create index' (no entry in
> pg_constraint) be re-created via alter table add constraint, or via
> create unique index?
CREATE UNIQUE INDEX has optimization purpose as well as an constraint
purpose. I think CREATE UNIQUE INDEX is the way to go.
> I prefer ...add constraint. After a while (release or 2) removal of
> create unique index all together.
Remove CREATE UNIQUE INDEX entirely? Why?
--
Bruce Momjian | http://candle.pha.pa.us
pgman(at)candle(dot)pha(dot)pa(dot)us | (610) 853-3000
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