Module « sqlalchemy »

Fonction funcfilter - module sqlalchemy

Signature de la fonction funcfilter

def funcfilter(func, *criterion) 

Description

funcfilter.__doc__

Produce a :class:`.FunctionFilter` object against a function.

        Used against aggregate and window functions,
        for database backends that support the "FILTER" clause.

        E.g.::

            from sqlalchemy import funcfilter
            funcfilter(func.count(1), MyClass.name == 'some name')

        Would produce "COUNT(1) FILTER (WHERE myclass.name = 'some name')".

        This function is also available from the :data:`~.expression.func`
        construct itself via the :meth:`.FunctionElement.filter` method.

        .. versionadded:: 1.0.0

        .. seealso::

            :ref:`tutorial_functions_within_group` - in the
            :ref:`unified_tutorial`

            :meth:`.FunctionElement.filter`