"Bart van Houdt" <bart.van.houdt@syfact.com> writes:
> I am working on a query to retrieve all indexed columns and came up with
> the following query:
> ...
> Tis query works for single column indexes, but with multiple column
> indexes I get incorrect results... I'm having a hard time figuring out
> how to join pg_attribute.indkey in this, could anyone help me out on
> this one?
Look at the information_schema views. You might find that one of them
already solves your problem ... and even if not, they will provide
examples of how to deconstruct the catalog information.
share/information_schema.sql in an installed PG file set is the
most convenient thing to study.
regards, tom lane