Re: Dropping a temporary view?

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От Christophe Pettus
Тема Re: Dropping a temporary view?
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Msg-id FF099452-FFAF-41D3-B014-77A81216668F@thebuild.com
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Ответ на Re: Dropping a temporary view?  (Celia McInnis <celia.mcinnis@gmail.com>)
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> On Mar 20, 2024, at 09:51, Celia McInnis <celia.mcinnis@gmail.com> wrote:
>
> The view is being used in some web query software that multiple people will be accessing and the contents of the view
dependon what the person is querying, so I think that temporary views or tables are a good idea. 

There's nothing wrong with temporary views or tables, and the use-case you describe is a reasonable one.  The issue
comesup when they have the same name as a permanent view or table. 

It's deterministic which one a query will use.  All temporary objects are in the pseudo-schema `pg_temp` (it's a
"pseudo-schema"because it's an alias to the current session's temporary schema, rather than a schema itself).  By
default,pg_temp is absent from search_path, which is treated as if it were the first entry, so temporary tables and
views"mask" the permanent ones.  However, if that temporary object doesn't happen to exist, or if pg_temp is explicitly
movedto a different position in the search path, you could have some surprising behavior. 


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