mirror of
https://github.com/postgres/postgres.git
synced 2026-02-22 17:31:00 -05:00
9701f238bc
This updates known_abbrevs.txt to be what it should have been already, were my -P patch not broken; and updates some tznames/ entries that missed getting any love in previous timezone data updates because zic failed to flag the change of abbreviation. The non-cosmetic updates: * Remove references to "ADT" as "Arabia Daylight Time", an abbreviation that's been out of use since 2007; therefore, claiming there is a conflict with "Atlantic Daylight Time" doesn't seem especially helpful. (We have left obsolete entries in the files when they didn't conflict with anything, but that seems like a different situation.) * Fix entirely incorrect GMT offsets for CKT (Cook Islands), FJT, FJST (Fiji); we didn't even have them on the proper side of the date line. (Seems to have been aboriginal errors in our tznames data; there's no evidence anything actually changed recently.) * FKST (Falkland Islands Summer Time) is now used all year round, so don't mark it as a DST abbreviation. * Update SAKT (Sakhalin) to mean GMT+11 not GMT+10. In cosmetic changes, I fixed a bunch of wrong (or at least obsolete) claims about abbreviations not being present in the zic files, and tried to be consistent about how obsolete abbreviations are labeled. Note the underlying timezone/data files are still at release 2014e; this is just trying to get us in sync with what those files actually say before we go to the next update. |
||
|---|---|---|
| .. | ||
| data | ||
| tznames | ||
| .gitignore | ||
| ialloc.c | ||
| known_abbrevs.txt | ||
| localtime.c | ||
| Makefile | ||
| pgtz.c | ||
| pgtz.h | ||
| private.h | ||
| README | ||
| scheck.c | ||
| strftime.c | ||
| tzfile.h | ||
| zic.c | ||
src/timezone/README Timezone ======== This is a PostgreSQL adapted version of the timezone library from http://www.iana.org/time-zones The source code can be found at: ftp://ftp.iana.org/tz/releases/tzcode*.tar.gz The code is currently synced with release 2010c. There are many cosmetic (and not so cosmetic) differences from the original tzcode library, but diffs in the upstream version should usually be propagated to our version. The data files under data/ are an exact copy of the latest data set from: ftp://ftp.iana.org/tz/releases/tzdata*.tar.gz Since time zone rules change frequently in some parts of the world, we should endeavor to update the data files before each PostgreSQL release. While the files under data/ can just be duplicated when updating, manual effort is needed to update the time zone abbreviation lists under tznames/. These need to be changed whenever new abbreviations are invented or the UTC offset associated with an existing abbreviation changes. To detect if this has happened, after installing new files under data/ do gmake abbrevs.txt which will produce a file showing all abbreviations that are in current use according to the data/ files. Compare this to known_abbrevs.txt, which is the list that existed last time the tznames/ files were updated. Update tznames/ as seems appropriate, then replace known_abbrevs.txt in the same commit. When there has been a new release of Windows (probably including Service Packs), the list of matching timezones need to be updated. Run the script in src/tools/win32tzlist.pl on a Windows machine running this new release and apply any new timezones that it detects. Never remove any mappings in case they are removed in Windows, since we still need to match properly on the old version.