Hi again Akira, > psycopg2.ProgrammingError: syntax error at or near "GROUP" > LINE 1: ...ft >= _4.lft AND _5.lft <= _4.rgt ORDER BY _5.lft GROUP BY _... This is a bug fixed in 0.10, which will be released today. Apologies. -- Gustavo Niemeyer http://niemeyer.net