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Ok,, what about cache for SEQUENCE - where? how? 2+ messages / 2 participants [nested] [flat]
* Ok,, what about cache for SEQUENCE - where? how? @ 2003-04-21 04:25 foo2@on-spammers2.com 0 siblings, 1 reply; 2+ messages in thread From: foo2@on-spammers2.com @ 2003-04-21 04:25 UTC (permalink / raw) To: pgsql-sql The postgreSQL docs wave dire warnigns about the cache setting; if it is greater than one, apparently, sequences don't work (or at least, they work in a manner that isn't useful in the same way.) But the docs fail to point out where one could set, or even learn about, the cache setting. A search of the docs for "cache" turns up quite apparently useless references. So - where is the cache setting, and if that's only part of the answer, how does one see what it is set to? If it's set to two or more, how does one set it back to one so sequences will be guaranteed to work? Thanks for any answers. Walt Software Engineer Black Belt Systems pages: http://www.blackbeltsystems.com/ email: http://www.blackbeltsystems.com/contact.html ^ permalink raw reply [nested|flat] 2+ messages in thread
* Re: Ok,, what about cache for SEQUENCE - where? how? @ 2003-04-23 20:29 Bruno Wolff III <bruno@wolff.to> parent: foo2@on-spammers2.com 0 siblings, 0 replies; 2+ messages in thread From: Bruno Wolff III @ 2003-04-23 20:29 UTC (permalink / raw) To: the2@newsgroup2.com; +Cc: pgsql-sql On Mon, Apr 21, 2003 at 04:25:44 +0000, foo2@on-spammers2.com wrote: > The postgreSQL docs wave dire warnigns about the cache setting; if it > is greater than one, apparently, sequences don't work (or at least, > they work in a manner that isn't useful in the same way.) Yes they will still work usefully for what they are supposed to be used for. The will give you unique identifiers. You are more likely to get gaps this way, but you can get gaps anyway and shouldn't expect sequences to give you gap free lists of unique identifiers. > But the docs fail to point out where one could set, or even learn > about, the cache setting. A search of the docs for "cache" turns up > quite apparently useless references. This is described in the documentation for the create sequence and alter sequence commands. > > So - where is the cache setting, and if that's only part of the > answer, how does one see what it is set to? If it's set to two or > more, how does one set it back to one so sequences will be guaranteed > to work? You can use select cache_value from sequence_name . ^ permalink raw reply [nested|flat] 2+ messages in thread
end of thread, other threads:[~2003-04-23 20:29 UTC | newest] Thread overview: 2+ messages (download: mbox mbox.gz follow: Atom feed) -- links below jump to the message on this page -- 2003-04-21 04:25 Ok,, what about cache for SEQUENCE - where? how? foo2@on-spammers2.com 2003-04-23 20:29 ` Bruno Wolff III <bruno@wolff.to>
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