I think it would be nice to specify custom operators that can be used with 
the DAL as I believe this would allow for operators that are currently yet 
to be supported with a built-in DAL operator...

>From dal.py, I am thinking this should be relatively easy to implement, and 
code would be along the lines of:

update to dal.py

def raw_where(self, value, op):
  db = self.db
  return Query(db, op, self, value)


which enables the following in a project

def OPERATOR(self, first, second):
  return '(%s && %s)' % (self.expand(first), self.expand(second)) //'this 
return expression should be customised...


rows = db(db.table.field.raw_where(parameter, OPERATOR)).select()

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