On 2015-06-11 20:03:16 -0300, Alvaro Herrera wrote: > Rewriter > > Parsing occurs as currently. During query rewrite, specifically at the > bottom of the per-relation loop in fireRIRrules(), we will modify the > query tree: each relation RTE containing a colstore will be replaced > with a JoinExpr containing the relation as left child and the colstore > as right child (1). The colstore RTE will be of a new RTEKind. For > each such change, all Var nodes that point to attnums stored in the > colstore will modified so that they reference the RTE of the colstore > instead (2).
FWIW, I think this is a pretty bad place to tackle this. For one I think we shouldn't add more stuff using the rewriter unless it's clearly the best interface. For another, doing things in the rewriter will make optimizing things much harder - the planner will have to reconstruct knowledge which of the joins are column store joins and such. Why do you want to do things there? Greetings, Andres Freund -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
