Avoid creating PlaceHolderVars immediately within PlaceHolderVars. Such a construction is useless since the lower PlaceHolderVar is already nullable; no need to make it more so. Noted while pursuing bug #6154.
This is just a minor planner efficiency improvement, since the final plan will come out the same anyway after PHVs are flattened. So not worth the risk of back-patching. Branch ------ master Details ------- http://git.postgresql.org/pg/commitdiff/cff60f2dfa470d5736a19d36eb910844e31db764 Modified Files -------------- src/backend/optimizer/prep/prepjointree.c | 20 ++++++++++++++++---- 1 files changed, 16 insertions(+), 4 deletions(-) -- Sent via pgsql-committers mailing list (pgsql-committers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-committers
