Re: [COMMITTERS] pgsql: Add ERROR msg for GLOBAL/LOCAL TEMP is not yet implemented
От | Noah Misch |
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Тема | Re: [COMMITTERS] pgsql: Add ERROR msg for GLOBAL/LOCAL TEMP is not yet implemented |
Дата | |
Msg-id | 20120613222531.GD32211@tornado.leadboat.com обсуждение исходный текст |
Ответ на | Re: [COMMITTERS] pgsql: Add ERROR msg for GLOBAL/LOCAL TEMP is not yet implemented (Tom Lane <tgl@sss.pgh.pa.us>) |
Ответы |
Re: [COMMITTERS] pgsql: Add ERROR msg for GLOBAL/LOCAL TEMP is not yet implemented
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Список | pgsql-hackers |
On Wed, Jun 13, 2012 at 05:50:36PM -0400, Tom Lane wrote: > Applied with some further wordsmithing on docs and comments. We can > still tweak this if anyone objects, of course, but I thought it'd > probably save work to get it in before the branch. Thanks. The SQL standard also distinguishes between global and local temporary tables, where a local temporary table is only visiblewithin a specific SQL module, though its definition is still shared across sessions. Since PostgreSQL does not supportSQL modules, this distinction is not relevant in PostgreSQL. That new documentation paragraph describes the standard behavior for DECLARE LOCAL TEMPORARY TABLE. CREATE LOCAL TEMPORARY TABLE produces a table available to all modules but having one instance of its contents per module, per session. With GLOBAL, by contrast, all modules see the same table contents during a given session. nm
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