Hengky Liwandouw <hengkyliwand...@gmail.com> wrote: > where jualid is not null > and extract(year from tanggal)='2013')
> But the problem is : when i change the where clause to : > > where jualid is not null or returjualid is not null > and extract(year from tanggal)='2013') > > (there is additional or returjualid is not null,) the query needs > 56 second to display the result. Before worrying about the run time, I would worry about whether you are getting the results you expect. That will be interpreted as: where jualid is not null or (returjualid is not null and extract(year from tanggal) = '2013') ... not: where (jualid is not null or returjualid is not null) and extract(year from tanggal) = '2013' AND has higher priority than OR; so if you want to limit by year from tanggal even when jualid is not null, you must use parentheses. -- Kevin Grittner EDB: http://www.enterprisedb.com The Enterprise PostgreSQL Company -- Sent via pgsql-performance mailing list (pgsql-performance@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
