def _validate(self):
    from ibis.expr.analysis import FilterValidator
    dependent_exprs = (self.selections + self.sort_keys)
    self.table._assert_valid(dependent_exprs)
    validator = FilterValidator([self.table])
    validator.validate_all(self.predicates)
    assert self.schema
def _validate(self):
    from ibis.expr.analysis import FilterValidator
    dependent_exprs = (self.selections + self.sort_keys)
    self.table._assert_valid(dependent_exprs)
    validator = FilterValidator([self.table])
    validator.validate_all(self.predicates)
    assert self.schema