From: | Stephan Szabo <sszabo(at)megazone(dot)bigpanda(dot)com> |
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To: | Rajesh Kumar Mallah <mallah(at)trade-india(dot)com> |
Cc: | pgsql-general(at)postgresql(dot)org |
Subject: | Re: Problem with create index |
Date: | 2003-11-11 08:30:18 |
Message-ID: | 20031111002555.A47755@megazone.bigpanda.com |
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Thread: | |
Lists: | pgsql-general |
On Tue, 11 Nov 2003, Rajesh Kumar Mallah wrote:
> Hmmm... am i doing anything really silly?
Functional indexes on 7.3 and earlier only allow a function over one or
more columns (which would disallow the below as a function over a function
over a column). The usual workaround would be to make an immutable
function that does both functions on its argument something like:
create function lower_btrim(text) returns text as 'select
lower(btrim($1));' language 'sql' immutable;
create index profile_master2 on profile_master(lower_btrim(email));
In 7.4 I believe the below should work.
> tradein_clients=# CREATE INDEX profile_master2 on profile_master (lower( btrim(email) ) );
> ERROR: parser: parse error at or near "(" at character 61
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