I've committed a change in 5852 that will allow subquery() to be used in a scalar context in a WHERE clause - as_scalar() is now called on Alias objects.
On Mar 21, 2009, at 4:30 AM, Victor Lin wrote: > > Hi, > > I am using Elixir that based on SQLAlchemy to do some query like this: > > onAirs = db.session.query(model.OnAir.user_id).subquery() > sites = db.session.query(model.Site).filter(model.Site.user_id.in_ > (onAirs)) > > But it act not exactly like what I think. I got a syntax error: > > ProgrammingError: (ProgrammingError) (1064, "You have an error in your > SQL syntax; check the manual that corresponds to your MySQL server > version for the right syntax to use near 'SELECT on_air.user_id \nFROM > on_air' at line 4") u'SELECT site.user_id AS site_user_id, site.title > AS site_title, site.brief AS site_brief, site.description AS > site_description, site.visited AS site_visited, site.listened AS > site_listened, site.language AS site_language \nFROM site, (SELECT > on_air.user_id AS user_id \nFROM on_air) AS anon_1 \nWHERE > site.user_id = SELECT on_air.user_id \nFROM on_air' [] > > Well... it obviously, there is lack of parentheses. If I rewrite the > query syntax with parentheses, everything works fine. > > SELECT site.user_id AS site_user_id, site.title AS site_title, > site.brief AS site_brief, site.description AS site_description, > site.visited AS site_visited, site.listened AS site_listened, > site.language AS site_language \nFROM site, (SELECT on_air.user_id AS > user_id \nFROM on_air) AS anon_1 \nWHERE site.user_id = (SELECT > on_air.user_id \nFROM on_air) > > It does'nt make sense why SQLAlchemy did't put parentheses around > subquery? Is that a bug? What should I do to solve this problem? > > Thanks. > Victor Lin. > > --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "sqlalchemy" group. To post to this group, send email to sqlalchemy@googlegroups.com To unsubscribe from this group, send email to sqlalchemy+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sqlalchemy?hl=en -~----------~----~----~----~------~----~------~--~---
