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Sync our copy of the timezone library with IANA release tzcode2018e.

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The non-cosmetic changes involve teaching the "zic" tzdata compiler about
negative DST.  While I'm not currently intending that we start using
negative-DST data right away, it seems possible that somebody would try
to use our copy of zic with bleeding-edge IANA data.  So we'd better be
out in front of this change code-wise, even though it doesn't matter for
the data file we're shipping.

Discussion: https://postgr.es/m/30996.1525445902@sss.pgh.pa.us
This commit is contained in:
Tom Lane
2018-05-04 12:26:25 -04:00
parent 59cb323053
commit b45f6613e0
4 changed files with 129 additions and 46 deletions
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src/timezone/strftime.c
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@@ -203,7 +203,7 @@ _fmt(const char *format, const struct pg_tm *t, char *pt,
/*
* Locale modifiers of C99 and later. The sequences %Ec
* %EC %Ex %EX %Ey %EY %Od %oe %OH %OI %Om %OM %OS %Ou %OU
* %OV %Ow %OW %Oy are supposed to provide alternate
* %OV %Ow %OW %Oy are supposed to provide alternative
* representations.
*/
goto label;