On May 18, 2005, at 3:07 AM, Jan Sunavec wrote:
Hi
Is possible use SELECT NUM_ROWS, a, b, c FROM blabla WHERE x =id; I mean it's much more faster than
SELECT a, b, c FROM blabla WHERE x =id; and then SELECT count(*) FROM blabla WHERE x =id;
Can you do this on the client side? What client/interface are you using?
There is a nice archive of the postgres mailing lists here: http://archives.postgresql.org/
A quick search for ranks (not exactly what you want, but I think it has a useable solution in one of the posts) gets:
http://archives.postgresql.org/pgsql-general/2005-05/msg00157.php
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TIP 9: the planner will ignore your desire to choose an index scan if your
joining column's datatypes do not match
