Re: Unhandled exception in PGAdmin when opening 16-million-record table

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От Dmitriy Igrishin
Тема Re: Unhandled exception in PGAdmin when opening 16-million-record table
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Msg-id AANLkTi=kxEYgQKjs3NPtP2wQnMc4-3-7Gh-s3da=UnEK@mail.gmail.com
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Ответ на Re: Unhandled exception in PGAdmin when opening 16-million-record table  (Dave Page <dpage@pgadmin.org>)
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Ahh, yes. In this case it is possibly only with holdable cursors by declaring
them and committing before reading any rows from it to force materialization
of entire result set to the temporary storage.
Although, this approach can be used to avoid std::bad_alloc in case of
millions tuples in the result set :-)

2010/10/30 Dave Page <dpage@pgadmin.org>
On Sat, Oct 30, 2010 at 4:14 PM, Dmitriy Igrishin <dmitigr@gmail.com> wrote:
> Do you mean that cursors (regular, not holdable) live only inside a
> transactions?
> But it is possible to check transaction status from another part of pgAdmin
> or
> even make the window with result set modal ?

No, I mean that the tool was developed to help tune application
queries, in which the data transfer time can be just as important as
the query execution time. With cursors, you lose that information.

Of course, patches to make optional use of cursors would be interesting to us.

--
Dave Page
Blog: http://pgsnake.blogspot.com
Twitter: @pgsnake

EnterpriseDB UK: http://www.enterprisedb.com
The Enterprise PostgreSQL Company



--
// Dmitriy.


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