On Jul 3, 2016, at 6:58 PM, Tom Lane <t...@sss.pgh.pa.us> wrote: > It looks to me like set_append_rel_pathlist builds a partial path for > an appendrel only if there exist partial paths for all members of the > appendrel. I don't understand this restriction. Why could you not > build it from a regular path for each appendrel child? You'd have > to farm out entire childrels to workers, which might be larger chunks > of work than one could wish, but it seems better than failing to > parallelize at all.
Absolutely. The problem is merely that we need some executor support that has not been written yet. See discussions of Parallel Append in the archives. ...Robert -- Sent via pgsql-hackers mailing list (firstname.lastname@example.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers