Allow parallel custom and foreign scans

Enterprise / PostgreSQL - Robert Haas [postgresql.org] - 3 February 2016 11:49 UTC

This patch doesn't put the new infrastructure to use anywhere, and indeed it's not clear how it could ever be used for something like postgres_fdw which has to send an SQL query and wait for a reply, but there might be FDWs or custom scan providers that are CPU-bound, so let's give them a way to join club parallel.

KaiGai Kohei, reviewed by me.

69d3440 Allow parallel custom and foreign scans.
doc/src/sgml/custom-scan.sgml | 37 +++++++++++++++++++
doc/src/sgml/fdwhandler.sgml | 47 ++++++++++++++++++++++++
src/backend/executor/execParallel.c | 26 ++++++++++++++
src/backend/executor/nodeCustom.c | 45 +++++++++++++++++++++++
src/backend/executor/nodeForeignscan.c | 62 ++++++++++++++++++++++++++++++++
src/include/executor/nodeCustom.h | 11 ++++++
src/include/executor/nodeForeignscan.h | 8 +++++
src/include/foreign/fdwapi.h | 14 ++++++++
src/include/nodes/execnodes.h | 14 +++++++-
9 files changed, 263 insertions(+), 1 deletion(-)

Upstream: git.postgresql.org

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