Method _multi_name_map

lib/sqlalchemy/dialects/mssql/base.py:3944–3960

Build a case-insensitive ``server_name -> user_name`` mapper. MSSQL object names are case-insensitive under the default collation, so a user may pass ``"sOmEtAbLe"`` for a table physically stored as ``"SomeTable"``. The bulk SQL returns the server-side casing, but re

(filter_names)

    @staticmethod
    def _multi_name_map(filter_names):
        """Build a case-insensitive ``server_name -> user_name`` mapper.

        MSSQL object names are case-insensitive under the default
        collation, so a user may pass ``"sOmEtAbLe"`` for a table
        physically stored as ``"SomeTable"``. The bulk SQL returns the
        server-side casing, but result keys must use the user-supplied
        casing so that downstream code (e.g.
        :meth:`.Inspector.reflect_table`) can find the entry.

        Returns a callable ``(server_name) -> user_name``. When
        ``filter_names`` is empty/None, returns identity.
        """
        if not filter_names:
            return lambda n: n
        lookup = {n.lower(): n for n in filter_names}
        return lambda n: lookup.get(n.lower(), n)

    @_db_plus_owner_multi
    def get_multi_columns(