On Dec 6, 2007, at 11:41 AM, Artur Siekielski wrote:
> > Hi. > I know that I can do SQL UNION of two record sets when using SQL > Expression objects. But how to do UNION of two sqlalchemy.orm.Query > objects? I can do the UNION on SQL Expressions level and then use > 'from_statement' from Query, but what I can do if I already have two > Queries? > you can pull out the select() generated by Query using query.compile(). individual components of the select() are available as well although in a not-yet-public API, using such datamembers as query._criterion, query._from_obj, etc. As far as a union() operator directly on Query, we dont have that right now and it falls under a general category of "re-generative Query" operators (i just made that name up), i.e. Query objects that can interact with themselves and other queries the way select() objects do in SQL (i.e. subquery of itself, etc). We've had a little bit of interest in building that out but we havent begun to address the actual complexity involved as of yet. --~--~---------~--~----~------------~-------~--~----~ 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 [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sqlalchemy?hl=en -~----------~----~----~----~------~----~------~--~---
