Fix possible crash in add_paths_to_append_rel() While working on a8a968a82, I failed to consider that cheapest_startup_path can be NULL when there is no non-parameterized path in the pathlist. This is well documented in set_cheapest(), I just failed to notice.
Here we adjust the code to just check if the RelOptInfo has a cheapest_startup_path set before adding it to the startup_subpaths list. Reported-by: Richard Guo Author: Richard Guo Discussion: https://postgr.es/m/cambws49w3t03v69xhdcuw+gdwivny4uquxrkvp6gejaspt0...@mail.gmail.com Branch ------ master Details ------- https://git.postgresql.org/pg/commitdiff/fc4089f3c65a5f1b413a3299ba02b66a8e5e37d0 Modified Files -------------- src/backend/optimizer/path/allpaths.c | 11 +++++++---- src/test/regress/expected/union.out | 16 ++++++++++++++++ src/test/regress/sql/union.sql | 9 ++++++++- 3 files changed, 31 insertions(+), 5 deletions(-)
