Thank you, I am remaning this coalesce_zero and using the coalesce function. Should be more portable. Please check it in trunk in few minutes.
Massimo On Mar 29, 2:15 pm, Jim Karsten <iiijjj...@gmail.com> wrote: > I would like to sort records on a field such that NULL values get > sorted to the end. In MySQL the suggested solution is to use ISNULL. > For example > > SELECT name FROM person ORDER BY ISNULL(name), name; > > I tried other approaches such as sorting the rows returned from a > select but they were not practical as all records need to be retrieved > and in the application I am working on I only want a subset (ie. I am > using limitby) > > I was able to implement this in web2py with the following patch. > > gluon/dal.py > > class BaseAdapter(ConnectionPool): > > def ISNULL(self,first): > return 'ISNULL(%s)' % self.expand(first) > > class Expression(object): > > def isnull(self): > return Expression(self.db, self.db._adapter.ISNULL, self, > None, self.type) > > Is there any desire for this feature in the trunk? I haven't given any > consideration to databases other than MySQL. I would be willing to dig > into this further if there is interest.
