Hi Martin,

Is there an example of this in the documentation?

I think it would be very helpful to have a guide of best practice when porting cursor based code although I'm not sure that is possible in general?

Best regards,

Alastair

________________________________________ From: users-list users-list-bounces+a.mckinley=analyticsengines.com@monetdb.org on behalf of Martin Kersten Martin.Kersten@cwi.nl Sent: 31 March 2014 13:35 To: Communication channel for MonetDB users Subject: Re: Cycling through cursor in a procedure

Hi

MonetDB SQL does not support the CURSOR concept in SQL. For that you could consider using your own key-based cursor generator function.

regards, Martin

On 31/03/14 14:32, Radovan Bičiště wrote:

Hello, Please is there a flow control syntax for cycling through rows in a cursor in a procedure? I can not find any other solution to how to select highest numbers from a table which total falls under certain threshold. :( I have a function that returns sorted rows and can be used as a subquery and I did not get further ... Thank you, Radovan _______________________________________________ users-list mailing list users-list@monetdb.org https://www.monetdb.org/mailman/listinfo/users-list

_______________________________________________ users-list mailing list users-list@monetdb.org https://www.monetdb.org/mailman/listinfo/users-list

or if you need the N highest values:

select MyAttribute from MyTable where MyAttribute < MyThreshold order by MyAttribute desc limit N;

----- Original Message -----

"highest numbers from a table which total falls under certain threshold"

do you mean by any chance mean something like

select max(MyAttribute) from MyTable where MyAttribute < MyThreshold;

?

If so, no cursors required here ... ;-)

apologies, in case I missed your point ...

Stefan

----- Original Message -----

...

Hi Martin,

Is there an example of this in the documentation?

I think it would be very helpful to have a guide of best practice when porting cursor based code although I'm not sure that is possible in general?

Best regards,

Alastair

---

From: users-list users-list-bounces+a.mckinley=analyticsengines.com@monetdb.org on behalf of Martin Kersten Martin.Kersten@cwi.nl Sent: 31 March 2014 13:35 To: Communication channel for MonetDB users Subject: Re: Cycling through cursor in a procedure

Hi

MonetDB SQL does not support the CURSOR concept in SQL. For that you could consider using your own key-based cursor generator function.

regards, Martin

On 31/03/14 14:32, Radovan Bičiště wrote:

...

Hello, Please is there a flow control syntax for cycling through rows in a cursor in a procedure? I can not find any other solution to how to select highest numbers from a table which total falls under certain threshold. :( I have a function that returns sorted rows and can be used as a subquery and I did not get further ... Thank you, Radovan _______________________________________________ users-list mailing list users-list@monetdb.org https://www.monetdb.org/mailman/listinfo/users-list

---

users-list mailing list users-list@monetdb.org https://www.monetdb.org/mailman/listinfo/users-list _______________________________________________ users-list mailing list users-list@monetdb.org https://www.monetdb.org/mailman/listinfo/users-list

-- | Stefan.Manegold@CWI.nl | DB Architectures (DA) | | www.CWI.nl/~manegold/ | Science Park 123 (L321) | | +31 (0)20 592-4212 | 1098 XG Amsterdam (NL) |

---

users-list mailing list users-list@monetdb.org https://www.monetdb.org/mailman/listinfo/users-list