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From: Wei Shan <[email protected]>
To: Dmitry Igrishin <[email protected]>
Cc: [email protected]
Subject: Re: Questions on Cursors in PostgreSQL
Date: Tue, 4 Jul 2017 09:53:08 +0100
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Thanks a lot!




On 27 Jun 2017 18:53, "Dmitry Igrishin" <[email protected]> wrote:



2017-06-27 20:07 GMT+03:00 Wei Shan <[email protected]>:

> Hi all,
>
> I have some questions on PostgreSQL cursors (not PL/pgSQL but the libpq
> implementation):
>
>
>    1. What happens when my cursor hit the end of the table? Does it close
>    automatically? I suppose if I declare it as a SCROLLABLE cursor, it should
>    not close at all.
>
> The lifetime of cursors created by the DECLARE ... SQL command longs until
the end of the session, or until it explicitly closed by either CLOSE ...
or DISCARD SQL commands.

>
>    1. If I have declared a cursor and the session got disconnected, can I
>    reattach back to the cursor if I know the cursor name? I believe this is
>    not possible but I'm not very sure.
>
> When session ends all cursors are deallocated automatically. You should
open the new cursor on reconnect.

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