On Tue, Dec 27, 2011 at 12:47 PM, Tom Lane <tgl@sss.pgh.pa.us> wrote:
> wcting163@163.com writes:
>> The reason is that the function p_test_execute is executed twice, when
>> *fetch*, it is first executed, and when transaction commit, because the
>> cursor is a *holdable* cursor, it is executed again.
>
> Yup. =A0I don't particularly see this as a bug. =A0If you were to manually
> rewind and rescan the cursor (ie, MOVE BACKWARD ALL and re-fetch),
> the function would be executed multiple times too. =A0If you don't want
> that to happen, the best way would be to commit the transaction
> immediately, not fetch some rows and then commit.
Is that even per spec? I would not expect the results, or the
side-effects, of a query to depend on the method used to retrieve its
results.
--=20
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company
