* out_table_col: sql_gen.Col|str

        * in_table_col: sql_gen.Col Wrap literal values in a sql_gen.NamedCol

    @param into The table to contain the output and input pkeys.

    @return sql_gen.Col Where the output pkeys are made available

    '''

    out_table = sql_gen.as_Table(out_table)

    for in_table_col in mapping.itervalues():

        assert isinstance(in_table_col, sql_gen.Col)

    into = sql_gen.as_Table(into)

    def log_debug(msg): db.log_debug(msg, level=1.5)

    log_debug('Joining together input tables into temp table')

    # Place in new table for speed and so don't modify input if values edited

    flatten_cols = filter(sql_gen.is_table_col, mapping.values())

    mapping = dicts.join(mapping, flatten(db, in_table, input_joins,

        flatten_cols, preserve=[in_pkey_col], start=0))

    # Do inserts and selects

    join_cols = {}

    while True:

        has_joins = join_cols != {}