Re: Problem with index not being chosen inside PL/PgSQL function...

Hmm - good question! However, it is - both the id and not_displayed_id are INTEGERs. Changing the function header to:

CREATE OR REPLACE FUNCTION test_unlock ( id_locked alert.not_displayed_id%TYPE ) RETURNS alert.id%TYPE AS $test_unlock$

sadly doesn't affect the performance at all. I should have been a little more careful with the datatypes there, but this was a temporary function used to help me debug the problem and also help show it to the world. The original function has a bit more to it and is called by a higher-level function, but I've tracked the slowness down to this issue :)...

Just for grins, I also changed the query to:

SELECT ah.* INTO last_alert FROM alert ah where ( (ah.replaced_by_id = '0') AND (not_displayed_id = id_locked::INTEGER ) ) ORDER BY replaced_by_id, not_displayed_id;

Still no improvement :(.

Thanks for the suggestion though!

________________________________________
From: Tom Lane [tgl(at)sss(dot)pgh(dot)pa(dot)us]
Sent: Tuesday, December 18, 2007 10:11 AM
To: Weber, Geoffrey M.
Cc: pgsql-general(at)postgresql(dot)org
Subject: Re: [GENERAL] Problem with index not being chosen inside PL/PgSQL function...

"Weber, Geoffrey M." <Geoffrey(dot)Weber(at)mcleodusa(dot)com> writes:
> The problem I'm having is in one particular spot where I'm trying to
> run a "parametized" query inside a PL/PgSQL function.

I wonder whether the parameter is actually of the same datatype as the
indexed column.

regards, tom lane

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