Yes. try... except... should not contain database queries because if the db 
raises an exception you cannot ignore it, you need to rollback.

On Monday, 19 May 2014 02:45:13 UTC-5, [email protected] wrote:
>
> Hi
>
> I would like to propose the following edit to isempty() in gluon.dal as I 
> believe this would improve performance particularly for tables with 
> numerous fields:
>
>
> def isempty(self):
>         try: 
>             return not self.select('id', limitby=(0, 1),orderby_on_limitby
> =False) 
>         except: 
>             return not self.select(limit=(0, 1), orderby_on_limitby=False)
>
>
> Are there any drawbacks?
>
>
> Tan
>
>
>

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