Are piped columns indexable

From: "Mark Steben" <msteben(at)autorevenue(dot)com>
To: <pgsql-performance(at)postgresql(dot)org>
Subject: Are piped columns indexable
Date: 2008-03-12 20:38:14
Message-ID: 013201c88480$fe93f990$14010a0a@dei26g028575
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Hi all,

Just upgraded to 8.2.5.

Given table t with columns a, b, c, d

And index on t using btree (a,b)

Is this indexable:

Select * from t where a || b = '124cab' (or whatever)

Assume a and b are defined as char(3)

I have tried various op classes and so far have just gotten sequential scans

Thanks for your time

Mark Steben

Senior Database Administrator
@utoRevenueT
A Dominion Enterprises Company
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msteben <blocked::mailto:name(at)autorevenue(dot)com> @autorevenue.com

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