[GENERAL] surprising results with random()

2009-02-23 Thread Jessi Berkelhammer
ly fewer 2s? I understand that random() is not truly random, and that the seed affects this value. But it still confuses me that, no matter how many times I run this, there are always so few 2s. If it is generating an independent random number in the second call to random(), then I don't

Re: [GENERAL] oddly slow query

2008-01-14 Thread Jessi Berkelhammer
Hello. Thanks for the help. Tom Lane wrote: Jessi Berkelhammer <[EMAIL PROTECTED]> writes: Here are the 3 EXPLAIN ANALYZE commands followed by the output: Well, here's the problem: Join Filter: (clinical_reg_current.client_id = client.client_id) ->

Re: [GENERAL] oddly slow query

2008-01-11 Thread Jessi Berkelhammer
Filter: ((NOT is_deleted) AND (clinical_reg_date <= ('now'::text)::date) AND ((clinical_reg_date_end >= ('now'::text)::date) OR (clinical_reg_date_end IS NULL)) AND ((kc_authorization_status_code)::text <> ALL (('{CX,TM}'::character vary

[GENERAL] oddly slow query

2008-01-11 Thread Jessi Berkelhammer
on the slow query: Aggregate (cost=8969.16..8969.17 rows=1 width=0) (actual time=709703.985..709703.987 rows=1 loops=1) -> Nested Loop Left Join (cost=755.61..8968.29 rows=346 width=0) (actual time=147.667..709700.553 rows=684 loops=1) Does anybody have ideas why this is so slow? Tha