Python sqlalchemy 模块,funcfilter() 实例源码
我们从Python开源项目中,提取了以下46个代码示例,用于说明如何使用sqlalchemy.funcfilter()。
def over(self, partition_by=None, order_by=None):
"""Produce an OVER clause against this filtered function.
Used against aggregate or so-called "window" functions,
for database backends that support window functions.
The expression::
func.rank().filter(MyClass.y > 5).over(order_by='x')
is shorthand for::
from sqlalchemy import over,funcfilter
over(funcfilter(func.rank(),MyClass.y > 5),order_by='x')
See :func:`~.expression.over` for a full description.
"""
return Over(self, partition_by=partition_by, order_by=order_by)
def __init__(self, func, *criterion):
"""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::
:meth:`.FunctionElement.filter`
"""
self.func = func
self.filter(*criterion)
def __init__(self,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::
:meth:`.FunctionElement.filter`
"""
self.func = func
self.filter(*criterion)
def __init__(self,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::
:meth:`.FunctionElement.filter`
"""
self.func = func
self.filter(*criterion)
def __init__(self,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::
:meth:`.FunctionElement.filter`
"""
self.func = func
self.filter(*criterion)
def __init__(self,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::
:meth:`.FunctionElement.filter`
"""
self.func = func
self.filter(*criterion)
def __init__(self,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::
:meth:`.FunctionElement.filter`
"""
self.func = func
self.filter(*criterion)
def __init__(self,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::
:meth:`.FunctionElement.filter`
"""
self.func = func
self.filter(*criterion)
def __init__(self,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::
:meth:`.FunctionElement.filter`
"""
self.func = func
self.filter(*criterion)
def __init__(self,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::
:meth:`.FunctionElement.filter`
"""
self.func = func
self.filter(*criterion)
def __init__(self,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::
:meth:`.FunctionElement.filter`
"""
self.func = func
self.filter(*criterion)
def __init__(self,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::
:meth:`.FunctionElement.filter`
"""
self.func = func
self.filter(*criterion)
def __init__(self,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::
:meth:`.FunctionElement.filter`
"""
self.func = func
self.filter(*criterion)
def __init__(self,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::
:meth:`.FunctionElement.filter`
"""
self.func = func
self.filter(*criterion)
def __init__(self,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::
:meth:`.FunctionElement.filter`
"""
self.func = func
self.filter(*criterion)
def __init__(self,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::
:meth:`.FunctionElement.filter`
"""
self.func = func
self.filter(*criterion)
def __init__(self,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::
:meth:`.FunctionElement.filter`
"""
self.func = func
self.filter(*criterion)
def __init__(self,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::
:meth:`.FunctionElement.filter`
"""
self.func = func
self.filter(*criterion)
def __init__(self,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::
:meth:`.FunctionElement.filter`
"""
self.func = func
self.filter(*criterion)
def __init__(self,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::
:meth:`.FunctionElement.filter`
"""
self.func = func
self.filter(*criterion)
def __init__(self,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::
:meth:`.FunctionElement.filter`
"""
self.func = func
self.filter(*criterion)
def __init__(self,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::
:meth:`.FunctionElement.filter`
"""
self.func = func
self.filter(*criterion)
def __init__(self,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::
:meth:`.FunctionElement.filter`
"""
self.func = func
self.filter(*criterion)
def __init__(self,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::
:meth:`.FunctionElement.filter`
"""
self.func = func
self.filter(*criterion)