Removed SQLCompiler.__call__() per deprecation timeline.

import re

import warnings

from itertools import chain

from django.core.exceptions import FieldError

from django.db.models.sql.query import Query, get_order_dir

from django.db.transaction import TransactionManagementError

from django.db.utils import DatabaseError

from django.utils.deprecation import RemovedInDjango110Warning

from django.utils.six.moves import zip

                    extra_select.append((expr, (without_ordering, params), None))

        return extra_select

    def __call__(self, name):

        """

        Backwards-compatibility shim so that calling a SQLCompiler is equivalent to

        calling its quote_name_unless_alias method.

        """

        warnings.warn(

            "Calling a SQLCompiler directly is deprecated. "

            "Call compiler.quote_name_unless_alias instead.",

            RemovedInDjango110Warning, stacklevel=2)

        return self.quote_name_unless_alias(name)

    def quote_name_unless_alias(self, name):

        """

        A wrapper around connection.ops.quote_name that doesn't quote aliases