Re: create index with substr function

From: Rosser Schwarz <rosser(dot)schwarz(at)gmail(dot)com>
To: Ray <ray_siu(at)ge-ts(dot)com(dot)hk>
Cc: pgsql-performance(at)postgresql(dot)org
Subject: Re: create index with substr function
Date: 2004-10-21 03:34:55
Message-ID: 37d451f704102020346fdbb855@mail.gmail.com
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while you weren't looking, Ray wrote:

> CREATE INDEX idx_doc_substr_doc_urn ON doc USING btree (SUBSTR(doc_urn,10));

CREATE INDEX idx_doc_substr_doc_urn ON doc USING btree ((SUBSTR(doc_urn,10)));

You need an additional set of parens around the SUBSTR() call.

/rls

--
:wq

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