On 8/21/07, giuseppe.derossi@email.it <giuseppe.derossi@email.it> wrote:
>
> Hi Medi,
> Last night, I wrote a function which perfoms a subset of queries and returns
> the results of a temporary table. It's more fast than I believe and that's
> ok to me.
> There is a prolem : It works too fine. I'm afraid of Murphy's law. I red
> into the Internet that there are problem when there is a temporary table in
> a function. My queries are in direct way, that is, without Execute
> statement.
>
> What kind of problem can arise (session,caching, and so on) ? which should
> be the solution ?
The only real danger of using temp tables is that if you don't vacuum
often enough the system catalogs can get bloated. Also, if you create
a new connection for each access, then you might wind up with a lot of
pg_temp_xxx schemas laying about, but they don't really hurt anything.
Generally speaking temp tables in postgresql are pretty well behaved.