[rt-users] DBIx::SearchBuilder::Handle::Pg -- again

[Kenneth Marshall]

Dear DBIx::SearchBuilder developers:

Here is a re-send of a message that I posted in January of 2007
regarding a change in the DistinctQuery handling for PostgreSQL.
Using the version from the Oracle definition is a big performance
win. Would it be possible to include this change in the next
update to DBIx::SearchBuilder?

Cheers,
Ken

----- Forwarded message from Kenneth Marshall <ktm at rice.edu> -----

Date: Tue, 30 Jan 2007 10:23:52 -0600
From: Kenneth Marshall <ktm at rice.edu>
To: rt-users at lists.bestpractical.com
Subject: [rt-users] DBIx::SearchBuilder::Handle::Pg

Just an FYI. In preliminary testing, using the Handle::Oracle
definition for the DistinctQuery definition in Handle::Pg provides
quite a performance improvement. Here is the original line:

$$statementref = "SELECT DISTINCT main.* FROM $$statementref";

and the line from Handle::Oracle that should replace it:

$$statementref = "SELECT main.* FROM ( SELECT DISTINCT main.id FROM $$statementref ) distinctquery, $table main WHERE (main.id = distinctquery.id) ";

Ken Marshall
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----- End forwarded message -----