CVSROOT: /cvsroot
Module name: pgsql-server
Changes by: tgl@svr1.postgresql.org 03/11/25 15:17:59
Modified files:
src/backend/executor: Tag: REL7_4_STABLE nodeHashjoin.c
src/backend/optimizer/plan: Tag: REL7_4_STABLE createplan.c
Log message:
Band-aid solution for problems with SubPlans used in hash join clauses,
per report from Andrew Holm-Hansen. The difficulty arises from the fact
that the planner allowed a Hash node's hashkeys to share substructure
with the parent HashJoin node's hashclauses, plus some rather bizarre
choices about who initializes what during executor startup. A cleaner
but more invasive solution is to not store hashkeys separately in the
plan tree at all, but let the HashJoin node deconstruct hashclauses
during executor startup. I plan to fix it that way in HEAD.