Doc: add some commentary about ExecutorRun's NoMovement special case. Robert Haas expressed concern about whether commit 3eea7a0c9 exposed the parallel-execution machinery to a case it isn't tested for, namely a second non-parallel execution of a plan after a parallel execution. Investigation shows that that can't happen because of pquery.c's manipulation of the scan direction, but it sure wasn't obvious to start with. Add some commentary about that.
Discussion: https://postgr.es/m/CA+TgmoagyKQy=hfw+wlo0aktywhui+ikswz8jnqqd-cfby-...@mail.gmail.com Branch ------ master Details ------- https://git.postgresql.org/pg/commitdiff/982890530379235974a7e99fd72e862ae40f1400 Modified Files -------------- src/backend/executor/execMain.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-)
