On Fri, 3 Oct 2003, Christopher Kings-Lynne wrote:
> Hi guys, > > If someone could help me with this, it would be cool. How do I query > the catalogs to find the underlying index for a constraint? (Assuming > the constraint is primary or unique) > For a primary key you can do: SELECT cls.relname AS index_name FROM pg_class cls, pg_constraint con, pg_index i WHERE cls.oid = i.indexrelid AND con.conrelid = i.indrelid AND i.indisprimary AND con.conname='<constraint name>'; This is not possible for a unique constraint because you can have multiple unique constraints per table. So you are left trying to match pg_constraint.conkey to pg_index.indkey (for which no default operator exists), but even this can fail if you have the unlikely situation of two unique indexes covering the same columns. Kris Jurka ---------------------------(end of broadcast)--------------------------- TIP 1: subscribe and unsubscribe commands go to [EMAIL PROTECTED]
