Hi All, the following takes about 2 seconds to run:
select route,not_in_route2(route) from ksanrt limit 5, but if i limit it to anything greater than 5 it takes forever to come back. Forever as in I always cancel the query. Any reasons why? On 7/19/06, Rhys Stewart <[EMAIL PROTECTED]> wrote:
well i started by creating a table with the data i needed, instead of working on the big table....that helped a whole lot. thanks. On 7/18/06, Michael Fuhr <[EMAIL PROTECTED]> wrote: > On Tue, Jul 18, 2006 at 08:11:40AM -0500, Rhys Stewart wrote: > > i created a function and it takes a long time to run. I was testing it > > as a wrote it and to the first drop table it takes just short of a > > second. however when the rest of the code is added on, it takes > > upwards of 5 minutes. Not the most appropriate thing. Are there any > > tips out there for making functions go faster? > > Find out what parts of the function are slow. Have you used RAISE > to display the function's progress? Have you executed any of the > queries by hand to see how fast they run? Have you used EXPLAIN > ANALYZE to see if you could benefit from rewriting a query, adding > indexes, or tuning configuration settings? > > The UPDATE statement with the ORs and regular expression matches > looks like it might be slow. Is it? > > -- > Michael Fuhr >
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