Function _getitem_impl

lib/sqlalchemy/sql/default_comparator.py:229–242

(
    expr: ColumnElement[Any], op: OperatorType, other: Any, **kw: Any
)

def _getitem_impl(
    expr: ColumnElement[Any], op: OperatorType, other: Any, **kw: Any
) -> ColumnElement[Any]:
    if (
        isinstance(expr.type, type_api.INDEXABLE)
        or isinstance(expr.type, type_api.TypeDecorator)
        and isinstance(expr.type.impl_instance, type_api.INDEXABLE)
    ):
        other = coercions.expect(
            roles.BinaryElementRole, other, expr=expr, operator=op
        )
        return _binary_operate(expr, op, other, **kw)
    else:
        _unsupported_impl(expr, op, other, **kw)


def _unsupported_impl(