From: Tom Lane <tgl@sss.pgh.pa.us>
To: Dmitriy Igrishin <dmitigr@gmail.com>
Cc: postgres list <pgsql-sql@postgresql.org>
Subject: Re: Selecting names of indexes that are not dependent on constraints.
Date: Thu, 11 Mar 2010 10:34:47 -0500
Message-ID: <20643.1268321687@sss.pgh.pa.us> (raw)
In-Reply-To: <b4399d111003110715h1415e094paaf0d5e5e0ada46@mail.gmail.com>
References: <b4399d111003110715h1415e094paaf0d5e5e0ada46@mail.gmail.com>
Dmitriy Igrishin <dmitigr@gmail.com> writes:
> How can I select names of indexes of table (or even whole schema) that are
> not dependent on constraints?
Right at the moment, the only reliable way to tell whether an index is
associated with a constraint is to look for a pg_depend entry linking
the two. Be careful to consider only "internal" dependencies, else you
may be fooled by foreign-key constraints that depend on indexes.
If you look into the pg_dump source code you will find an example.
9.0 will make this a tad simpler by keeping a "conindid" column in
pg_constraint.
regards, tom lane
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Cc: tgl@sss.pgh.pa.us, dmitigr@gmail.com
Subject: Re: Selecting names of indexes that are not dependent on constraints.
In-Reply-To: <20643.1268321687@sss.pgh.pa.us>
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