Hi 2015-02-09 10:37 GMT+01:00 Marc Balmer <m...@msys.ch>:
> Currently there are FETCH and the (non standard) MOVE commands to work > on cursors. > > (I use cursors to display large datasets in a page-wise way, where the > user can move per-page, or, when displaying a single record, per record. > When the user goes back from per-record view to page-view, I have to > restore the cursor to the position it was on before the user changed to > per-record view.) > > I have to "manually" keep track of the cursor position, but in some > cases it would definitely be easier to just query the current cursor > position directly from the database and later use "MOVE ABSOLUTE" to > rewind it to that position. That could be achieved e.g. by a > hypothetical "TELL <cursor-name>" command. It does, however, not exist > and I have not found an alternative. Is there a way to query the > current cusros position at all? If not, does a TELL command sound like > a good or bad idea? > It sounds like good idea. Do we need a new statement? We can implement returning the position to MOVE statement. It returns a delta, but it can returns a absolute position too. Regards Pavel > > -- > Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) > To make changes to your subscription: > http://www.postgresql.org/mailpref/pgsql-hackers >
