Method type_descriptor

lib/sqlalchemy/engine/interfaces.py:1326–1338

Transform a generic type to a dialect-specific type. Dialect classes will usually use the :func:`_types.adapt_type` function in the types module to accomplish this. The returned result is cached *per dialect class* so can contain no dialect-instance state.

(self, typeobj: TypeEngine[_T])

        raise NotImplementedError()

    def type_descriptor(self, typeobj: TypeEngine[_T]) -> TypeEngine[_T]:
        """Transform a generic type to a dialect-specific type.

        Dialect classes will usually use the
        :func:`_types.adapt_type` function in the types module to
        accomplish this.

        The returned result is cached *per dialect class* so can
        contain no dialect-instance state.

        """

        raise NotImplementedError()

    def initialize(self, connection: Connection) -> None:
        """Called during strategized creation of the dialect with a