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Commit0ce0801

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Add regression test coverage for non-default timezone abbreviation sets.
After further reflection about the mess cleaned up in commit39b691f,I decided the main bit of test coverage that was still missing was tocheck that the non-default abbreviation-set files we supply are usable.Add that.Back-patch to supported branches, just because it seems like a goodidea to keep this all in sync.
1 parentc26a3ab commit0ce0801

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‎src/test/regress/expected/timestamptz.out

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@@ -2558,3 +2558,18 @@ select count(distinct utc_offset) >= 24 as ok from pg_timezone_abbrevs;
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t
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(1 row)
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-- Let's check the non-default timezone abbreviation sets, too
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set timezone_abbreviations = 'Australia';
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select count(distinct utc_offset) >= 24 as ok from pg_timezone_abbrevs;
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ok
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----
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t
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(1 row)
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set timezone_abbreviations = 'India';
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select count(distinct utc_offset) >= 24 as ok from pg_timezone_abbrevs;
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ok
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----
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t
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(1 row)
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‎src/test/regress/sql/timestamptz.sql

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@@ -460,3 +460,8 @@ SELECT '2007-12-09 07:30:00 UTC'::timestamptz AT TIME ZONE 'VET';
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--
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selectcount(distinct utc_offset)>=24as okfrom pg_timezone_names;
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selectcount(distinct utc_offset)>=24as okfrom pg_timezone_abbrevs;
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-- Let's check the non-default timezone abbreviation sets, too
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set timezone_abbreviations='Australia';
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selectcount(distinct utc_offset)>=24as okfrom pg_timezone_abbrevs;
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set timezone_abbreviations='India';
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selectcount(distinct utc_offset)>=24as okfrom pg_timezone_abbrevs;

‎src/timezone/README

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@@ -34,6 +34,11 @@ in the same commit. Usually, if a known abbreviation has changed meaning,
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the appropriate fix is to make it refer to a long-form zone name instead
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of a fixed GMT offset.
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The core regression test suite does some simple validation of the zone
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data and abbreviations data (notably by checking that the pg_timezone_names
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and pg_timezone_abbrevs views don't throw errors). It's worth running it
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as a cross-check on proposed updates.
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When there has been a new release of Windows (probably including Service
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Packs), the list of matching timezones need to be updated. Run the
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script in src/tools/win32tzlist.pl on a Windows machine running this new

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