Method _get_froms

lib/sqlalchemy/sql/selectable.py:4984–5008

(
        self, statement: Select[Unpack[TupleAny]]
    )

        return go

    def _get_froms(
        self, statement: Select[Unpack[TupleAny]]
    ) -> List[FromClause]:
        ambiguous_table_name_map: _AmbiguousTableNameMap
        self._ambiguous_table_name_map = ambiguous_table_name_map = {}

        return self._normalize_froms(
            itertools.chain(
                self.from_clauses,
                itertools.chain.from_iterable(
                    [
                        element._from_objects
                        for element in statement._raw_columns
                    ]
                ),
                itertools.chain.from_iterable(
                    [
                        element._from_objects
                        for element in statement._where_criteria
                    ]
                ),
            ),
            check_statement=statement,
            ambiguous_table_name_map=ambiguous_table_name_map,
        )

    @classmethod
    def _normalize_froms(