Avoid using timezone Asia/Manila in regression tests. The freshly-released 2025a version of tzdata has a refined estimate for the longitude of Manila, changing their value for LMT in pre-standardized-timezone days. This changes the output of one of our test cases. Since we need to be able to run with system tzdata files that may or may not contain this update, we'd better stop making that specific test.
I switched it to use Asia/Singapore, which has a roughly similar UTC offset. That LMT value hasn't changed in tzdb since 2003, so we can hope that it's well established. I also noticed that this set of make_timestamptz tests only exercises zones east of Greenwich, which seems rather sad, and was not the original intent AFAICS. (We've already changed these tests once to stabilize their results across tzdata updates, cf 66b737cd9; it looks like I failed to consider the UTC-offset-sign aspect then.) To improve that, add a test with Pacific/Honolulu. That LMT offset is also quite old in tzdb, so we'll cross our fingers that it doesn't get improved. Reported-by: Christoph Berg <c...@df7cb.de> Discussion: https://postgr.es/m/z46inkzncxesv...@msg.df7cb.de Backpatch-through: 13 Branch ------ REL_15_STABLE Details ------- https://git.postgresql.org/pg/commitdiff/8856267284a316f453655a025393fefecc338b0e Modified Files -------------- src/include/datatype/timestamp.h | 2 +- src/test/regress/expected/timestamptz.out | 10 ++++++++-- src/test/regress/sql/timestamptz.sql | 3 ++- 3 files changed, 11 insertions(+), 4 deletions(-)
