I wrote: > Robert Haas <robertmh...@gmail.com> writes: >> Well, append_rel_list has an AppendRelInfo for every RTE and that >> contains a List (translated_vars) which in turn contains a Var node >> for every column. I'm not sure how that compares to the RTE itself.
> RTEs also have a per-column component, namely the lists of column alias > names. ... although I see that range_table_mutator doesn't bother to copy/change the column alias substructure. (Wonder if that gives rise to any observable EXPLAIN bugs...) But it still seems like the append_rel_list shouldn't be all that much bulkier than all the other crap that gets generated inside this loop. We're not doing anything at all to reclaim space consumed inside subquery_planner, and you'd think that would be a lot. By the by, the tablesample additions to range_table_mutator are obviously broken. regards, tom lane -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers