Re: Cursors and Transactions, why? - Mailing list pgsql-general

On Apr 7, 2004, at 12:43 AM, Joe Conway wrote:

> Eric Ridge wrote:
>> On Apr 6, 2004, at 11:54 AM, Jan Wieck wrote:
>>> And now you know why they are so good if you don't use all rows.
>>> This benefit I think goes away if you use Joe Conway's suggestion of
>>> WITH HOLD.
>> Okay, so WITH HOLD is actually materializing the entire resultset
>> (sequential scan or otherwise)?  If that's true, you're right, some
>> of the benefits do go away.
>
> Keep in mind that the tuplestore stays in memory as long as it fits
> within sort_mem kilobytes. And you can do:

More good information.  Thanks!

Is the tuplestore basically just an array of ItemPointer-s?  In mean,
it's not a copy of each entire row, is it?

eric