Function _emit_insert_statements

lib/sqlalchemy/orm/persistence.py:963–1284

Emit INSERT statements corresponding to value lists collected by _collect_insert_commands().

(
    base_mapper,
    uowtransaction,
    mapper,
    table,
    insert,
    *,
    bookkeeping=True,
    use_orm_insert_stmt=None,
    execution_options=None,
)

def _emit_insert_statements(
    base_mapper,
    uowtransaction,
    mapper,
    table,
    insert,
    *,
    bookkeeping=True,
    use_orm_insert_stmt=None,
    execution_options=None,
):
    """Emit INSERT statements corresponding to value lists collected
    by _collect_insert_commands()."""

    if use_orm_insert_stmt is not None:
        cached_stmt = use_orm_insert_stmt
        exec_opt = util.EMPTY_DICT

        # if a user query with RETURNING was passed, we definitely need
        # to use RETURNING.
        returning_is_required_anyway = bool(use_orm_insert_stmt._returning)
        deterministic_results_reqd = (
            returning_is_required_anyway
            and use_orm_insert_stmt._sort_by_parameter_order
        ) or bookkeeping
    else:
        returning_is_required_anyway = False
        deterministic_results_reqd = bookkeeping
        cached_stmt = base_mapper._memo(("insert", table), table.insert)
        exec_opt = {"compiled_cache": base_mapper._compiled_cache}

    if execution_options:
        execution_options = util.EMPTY_DICT.merge_with(
            exec_opt, execution_options
        )
    else:
        execution_options = exec_opt

    return_result = None

    for (
        (connection, _, hasvalue, has_all_pks, has_all_defaults),
        records,
    ) in groupby(
        insert,
        lambda rec: (
            rec[4],  # connection
            set(rec[2]),  # parameter keys
            bool(rec[5]),  # whether we have "value" parameters
            rec[6],
            rec[7],
        ),
    ):
        statement = cached_stmt

        if use_orm_insert_stmt is not None:
            statement = statement._annotate(
                {