Thread: proposal - new SPI cursor function
Hello, I am working on support scrollable cursors in plpgpsm. Scrollable cursors are in ToDo for plpgsql too. I need new function SPI_cursor_fetch_with_direction(Portal portal, int direction, long count) where is possible set direction of fetch statement. any comments? Regards Pavel Stehule _________________________________________________________________ Emotikony a pozadi programu MSN Messenger ozivi vasi konverzaci. http://messenger.msn.cz/
On Wed, 2007-01-03 at 18:30 +0100, Pavel Stehule wrote: > I am working on support scrollable cursors in plpgpsm. Scrollable cursors > are in ToDo for plpgsql too. I need new function > SPI_cursor_fetch_with_direction(Portal portal, int direction, long count) > where is possible set direction of fetch statement. Sounds good. Please ensure the default for PL/pgSQL remains as non-scrollable. That may or may not be the same for plpgpsm. -- Simon Riggs EnterpriseDB http://www.enterprisedb.com
> > > I am working on support scrollable cursors in plpgpsm. Scrollable >cursors > > are in ToDo for plpgsql too. I need new function > > SPI_cursor_fetch_with_direction(Portal portal, int direction, long >count) > > where is possible set direction of fetch statement. > >Sounds good. > >Please ensure the default for PL/pgSQL remains as non-scrollable. That >may or may not be the same for plpgpsm. > Default plpgpsm cursors are non scrollable too. But I have to do two patches. Syntax of declare section is total different. Between SQL/PSM and plpgsql is only one big difference (in default values). SQL/PSM procedures are flagged SECURITY DEFINER and plpgsql run wit default SECURITY CALLER. Pavel _________________________________________________________________ Chcete sdilet sve obrazky a hudbu s prateli? http://messenger.msn.cz/
On Wed, Jan 03, 2007 at 06:30:48PM +0100, Pavel Stehule wrote: > Hello, > > I am working on support scrollable cursors in plpgpsm. Scrollable cursors > are in ToDo for plpgsql too. I need new function > SPI_cursor_fetch_with_direction(Portal portal, int direction, long count) Is "int" a reasonable domain for directions? I'd think there would be at most values. Cheers, D > where is possible set direction of fetch statement. > > any comments? > > Regards > > Pavel Stehule > > _________________________________________________________________ > Emotikony a pozadi programu MSN Messenger ozivi vasi konverzaci. > http://messenger.msn.cz/ > > > ---------------------------(end of broadcast)--------------------------- > TIP 1: if posting/reading through Usenet, please send an appropriate > subscribe-nomail command to majordomo@postgresql.org so that your > message can get through to the mailing list cleanly -- David Fetter <david@fetter.org> http://fetter.org/ phone: +1 415 235 3778 AIM: dfetter666 Skype: davidfetter Remember to vote!
On Wed, Jan 03, 2007 at 12:36:27PM -0800, David Fetter wrote: > On Wed, Jan 03, 2007 at 06:30:48PM +0100, Pavel Stehule wrote: > > Hello, > > > > I am working on support scrollable cursors in plpgpsm. Scrollable cursors > > are in ToDo for plpgsql too. I need new function > > SPI_cursor_fetch_with_direction(Portal portal, int direction, long count) > > Is "int" a reasonable domain for directions? I'd think there would be > at most values. Er, "at most two." Cheers, D > > Cheers, > D > > where is possible set direction of fetch statement. > > > > > any comments? > > > > Regards > > > > Pavel Stehule > > > > _________________________________________________________________ > > Emotikony a pozadi programu MSN Messenger ozivi vasi konverzaci. > > http://messenger.msn.cz/ > > > > > > ---------------------------(end of broadcast)--------------------------- > > TIP 1: if posting/reading through Usenet, please send an appropriate > > subscribe-nomail command to majordomo@postgresql.org so that your > > message can get through to the mailing list cleanly > > -- > David Fetter <david@fetter.org> http://fetter.org/ > phone: +1 415 235 3778 AIM: dfetter666 > Skype: davidfetter > > Remember to vote! > > ---------------------------(end of broadcast)--------------------------- > TIP 9: In versions below 8.0, the planner will ignore your desire to > choose an index scan if your joining column's datatypes do not > match -- David Fetter <david@fetter.org> http://fetter.org/ phone: +1 415 235 3778 AIM: dfetter666 Skype: davidfetter Remember to vote!
i> > > > Is "int" a reasonable domain for directions? I'd think there would be > > at most values. > >Er, "at most two." > enum is better, true tree fields: FORWARD, BACKWARD, ABSOLUTE >Cheers, >D > > > > Cheers, > > D > > > where is possible set direction of fetch statement. > > > > > > > > any comments? > > > > > > Regards > > > > > > Pavel Stehule > > > > > > _________________________________________________________________ > > > Emotikony a pozadi programu MSN Messenger ozivi vasi konverzaci. > > > http://messenger.msn.cz/ > > > > > > > > > ---------------------------(end of >broadcast)--------------------------- > > > TIP 1: if posting/reading through Usenet, please send an appropriate > > > subscribe-nomail command to majordomo@postgresql.org so that >your > > > message can get through to the mailing list cleanly > > > > -- > > David Fetter <david@fetter.org> http://fetter.org/ > > phone: +1 415 235 3778 AIM: dfetter666 > > Skype: davidfetter > > > > Remember to vote! > > > > ---------------------------(end of broadcast)--------------------------- > > TIP 9: In versions below 8.0, the planner will ignore your desire to > > choose an index scan if your joining column's datatypes do not > > match > >-- >David Fetter <david@fetter.org> http://fetter.org/ >phone: +1 415 235 3778 AIM: dfetter666 > Skype: davidfetter > >Remember to vote! _________________________________________________________________ Citite se osamele? Poznejte nekoho vyjmecneho diky Match.com. http://www.msn.cz/
"Pavel Stehule" <pavel.stehule@hotmail.com> writes:
> I need new function
> SPI_cursor_fetch_with_direction(Portal portal, int direction, long count)
> where is possible set direction of fetch statement.
Huh? SPI_cursor_fetch already lets you specify forward or backward.
regards, tom lane
> >"Pavel Stehule" <pavel.stehule@hotmail.com> writes: > > I need new function > > SPI_cursor_fetch_with_direction(Portal portal, int direction, long >count) > > where is possible set direction of fetch statement. > >Huh? SPI_cursor_fetch already lets you specify forward or backward. > > regards, tom lane It doesn't allow FETCH_ABSOLUTE Regards Pavel Stehule _________________________________________________________________ Emotikony a pozadi programu MSN Messenger ozivi vasi konverzaci. http://messenger.msn.cz/
> > > I am working on support scrollable cursors in plpgpsm. Scrollable cursors > > > are in ToDo for plpgsql too. I need new function > > > SPI_cursor_fetch_with_direction(Portal portal, int direction, long count) > > > > Is "int" a reasonable domain for directions? I'd think there would be > > at most values. > > enum is better, true I don't think we want an enum here (maybe short). > tree fields: FORWARD, BACKWARD, ABSOLUTE I think for fetch absolute you are missing an offset argument. Andreas