Re: dubious optimization of the function in SELECT INTO target list - Mailing list pgsql-general

From Alvaro Herrera
Subject Re: dubious optimization of the function in SELECT INTO target list
Date
Msg-id 20151008175439.GJ4405@alvherre.pgsql
Whole thread Raw
In response to Re: dubious optimization of the function in SELECT INTO target list  (Oleksii Kliukin <alexk@hintbits.com>)
Responses Re: dubious optimization of the function in SELECT INTO target list  (Oleksii Kliukin <alexk@hintbits.com>)
List pgsql-general
Oleksii Kliukin wrote:

> Thank you, now it’s clear. I have to say there is no guarantee that
> the computation would be useless. Someone might be calling a function
> that updates/deletes rows in the SELECT INTO block, being forced to
> use SELECT INTO by inability of pl/pgSQL to just discard the result of
> a normal SELECT. I know one can use a loop or call PERFORM, but in
> some cases (a complex CTE computing the data for the function being
> called at the end, which updates the tables with this data) actually
> using SELECT INTO looks like the easiest path to achieve the desired
> result.

So this whole issue is just because it is not possible to use PERFORM
alongside WITH?

--
Álvaro Herrera                http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services


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