def _cumulative_to_window(translator, expr, window):
win = W.cumulative_window()
win = win.group_by(window._group_by).order_by(window._order_by)
op = expr.op()
klass = _cumulative_to_reduction[type(op)]
new_op = klass(*op.args)
new_expr = expr._factory(new_op, name=expr._name)
if type(new_op) in translator._rewrites:
new_expr = translator._rewrites[type(new_op)](new_expr)
return L.windowize_function(new_expr, win)
def _cumulative_to_window(translator, expr, window):
win = W.cumulative_window()
win = win.group_by(window._group_by).order_by(window._order_by)
op = expr.op()
klass = _cumulative_to_reduction[type(op)]
new_op = klass(*op.args)
new_expr = expr._factory(new_op, name=expr._name)
if type(new_op) in translator._rewrites:
new_expr = translator._rewrites[type(new_op)](new_expr)
return L.windowize_function(new_expr, win)
