Re: JDBC, prepared queries, and partitioning
От | Stephen Denne |
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Тема | Re: JDBC, prepared queries, and partitioning |
Дата | |
Msg-id | F0238EBA67824444BC1CB4700960CB4804A4F6CE@dmpeints002.isotach.com обсуждение исходный текст |
Ответ на | Re: JDBC, prepared queries, and partitioning ("Stephen Denne" <Stephen.Denne@datamail.co.nz>) |
Список | pgsql-jdbc |
I wrote: > Josh Berkus wrote > > So, just to confirm: there is no way with v3 to make it not > > use a cached > > plan, either on 8.2 or 8.3, correct? > > 8.3 server release notes mention a couple of options: > - Automatically re-plan cached queries when table definitions > change or statistics are updated (Tom) > - Implement new commands DISCARD ALL, DISCARD PLANS, DISCARD > TEMPORARY, CLOSE ALL, and DEALLOCATE ALL (Marko Kreen, Neil) > > I've no idea about the extent of that first one, but perhaps > you could include a tiny table in the query, and update > statistics on the table. Sorry, these seem to allow re-planning, instead of not caching a plan in the first place (which is the cause of not beingable to restrict the plan to a subset of your tables). Stephen. Disclaimer: At the Datamail Group we value team commitment, respect, achievement, customer focus, and courage. This email with any attachmentsis confidential and may be subject to legal privilege. If it is not intended for you please advise by reply immediately,destroy it and do not copy, disclose or use it in any way. __________________________________________________________________ This email has been scanned by the DMZGlobal Business Quality Electronic Messaging Suite. Please see http://www.dmzglobal.com/services/bqem.htm for details. __________________________________________________________________
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