Re: [SQL] Very slow updates when using IN syntax subselect

2006-02-11 Thread Tom Lane
Peter Eisentraut <[EMAIL PROTECTED]> writes: > Bryce Nesbitt wrote: >> They occur in fine time. That's good, thanks. But jeeze, can't >> postgres figure this out for itself? > I'm sure you wouldn't appreciate it if PostgreSQL did a full table scan > before each query to figure out the total siz

Re: [SQL] Very slow updates when using IN syntax subselect

2006-02-11 Thread Bryce Nesbitt
Peter Eisentraut wrote: > Bryce Nesbitt wrote: > >>> It seems pretty clear that you've never vacuumed nor analyzed these >>> tables ... else the planner would have some clue about their sizes. >>> Do that and then see what you get. >>> >> They occur in fine time. That's good, thanks. Bu

Re: [SQL] Very slow updates when using IN syntax subselect

2006-02-11 Thread Peter Eisentraut
Bryce Nesbitt wrote: > > It seems pretty clear that you've never vacuumed nor analyzed these > > tables ... else the planner would have some clue about their sizes. > > Do that and then see what you get. > > They occur in fine time. That's good, thanks. But jeeze, can't > postgres figure this out

Re: [SQL] Very slow updates when using IN syntax subselect

2006-02-11 Thread Bryce Nesbitt
Tom Lane wrote: > Bryce Nesbitt <[EMAIL PROTECTED]> writes: > >> Tom Lane wrote: >> >>> What does EXPLAIN show for this and for the base query? >>> > > >>-> Seq Scan on event (cost=0.00..0.00 rows=1 width=408) >> Filter: (reconciled = false) >> > > >

Re: [SQL] Very slow updates when using IN syntax subselect

2006-02-11 Thread Tom Lane
Bryce Nesbitt <[EMAIL PROTECTED]> writes: > Tom Lane wrote: >> What does EXPLAIN show for this and for the base query? >-> Seq Scan on event (cost=0.00..0.00 rows=1 width=408) > Filter: (reconciled = false) > select count(*) from event; > --- > 116226 It seems pret