Method render_literal_value

lib/sqlalchemy/sql/compiler.py:4083–4120

Render the value of a bind parameter as a quoted literal. This is used for statement sections that do not accept bind parameters on the target driver/database. This should be implemented by subclasses using the quoting services of the DBAPI.

(
        self, value: Any, type_: sqltypes.TypeEngine[Any]
    )

            return self.render_literal_value(value, bindparam.type)

    def render_literal_value(
        self, value: Any, type_: sqltypes.TypeEngine[Any]
    ) -> str:
        """Render the value of a bind parameter as a quoted literal.

        This is used for statement sections that do not accept bind parameters
        on the target driver/database.

        This should be implemented by subclasses using the quoting services
        of the DBAPI.

        """

        if value is None and not type_.should_evaluate_none:
            # issue #10535 - handle NULL in the compiler without placing
            # this onto each type, except for "evaluate None" types
            # (e.g. JSON)
            return self.process(elements.Null._instance())

        processor = type_._cached_literal_processor(self.dialect)
        if processor:
            try:
                return processor(value)
            except Exception as e:
                raise exc.CompileError(
                    f"Could not render literal value "
                    f'"{sql_util._repr_single_value(value)}" '
                    f"with datatype "
                    f"{type_}; see parent stack trace for "
                    "more detail."
                ) from e

        else:
            raise exc.CompileError(
                f"No literal value renderer is available for literal value "
                f'"{sql_util._repr_single_value(value)}" '
                f"with datatype {type_}"
            )

    def _truncate_bindparam(self, bindparam):
        if bindparam in self.bind_names: