In the example you pointed to, `c` are the columns of an object created by `alias()`
`secondary` was created as an `alias()`, and the query has 2 columns that were queried and named via `label()` "id" and "ancestor_id" sqlalchemy has a lot of relevant docs if you search via the keyword "CTE". there are a handful of posts in the archive , and possibly stackoverflow, on doing this in Postgresql. -- SQLAlchemy - The Python SQL Toolkit and Object Relational Mapper http://www.sqlalchemy.org/ To post example code, please provide an MCVE: Minimal, Complete, and Verifiable Example. See http://stackoverflow.com/help/mcve for a full description. --- You received this message because you are subscribed to the Google Groups "sqlalchemy" group. To unsubscribe from this group and stop receiving emails from it, send an email to sqlalchemy+unsubscr...@googlegroups.com. To post to this group, send email to sqlalchemy@googlegroups.com. Visit this group at https://groups.google.com/group/sqlalchemy. For more options, visit https://groups.google.com/d/optout.