def table_exists(db, table):

    table = sql_gen.as_Table(table)

    return list(tables(db, table.schema, table.name)) != []

def errors_table(db, table, if_exists=True):

    '''

    @param if_exists If set, returns None if the errors table doesn't exist

    @return None|sql_gen.Table

    '''

    table = sql_gen.as_Table(table)

    if table.srcs != (): table = table.srcs[0]

    errors_table = sql_gen.suffixed_table(table, '.errors')

    if if_exists and not table_exists(db, errors_table): return None

    return errors_table