Fix gapfill behaviour around dst switches #6908
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Additional details and impacted files@@ Coverage Diff @@
## main #6908 +/- ##
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+ Coverage 80.06% 80.75% +0.69%
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Files 190 199 +9
Lines 37181 37231 +50
Branches 9450 9732 +282
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+ Hits 29770 30067 +297
- Misses 2997 3202 +205
+ Partials 4414 3962 -452 ☔ View full report in Codecov by Sentry. |
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antekresic
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May 13, 2024
| @@ -656,7 +656,8 @@ gapfill_advance_timestamp(GapFillState *state) | |||
| * To be consistent with time_bucket we do UTC bucketing unless | |||
| * a different timezone got explicitly passed to the function. | |||
| */ | |||
| if (state->have_timezone) | |||
| if (state->have_timezone && | |||
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Comment update as to why we do this only for non-fixed intervals.
When advancing local time we might not actually advance the timestamp we process e.g. when we switch to DST in spring the local time advances by 1 hour but the UTC time stays the same. This patch changes the advance function to only advance in local time when we are dealing with non-fixed intervals, that is intervals that have a day or month component.
akuzm
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May 13, 2024
fabriziomello
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This release contains bug fixes since the 2.15.0 release. We recommend that you upgrade at the next available opportunity. **Bugfixes** * timescale#6540 Segmentation fault when backfilling data with COPY into a compressed chunk * timescale#6858 Before update trigger not working correctly * timescale#6908 Fix gapfill with timezone behaviour around dst switches * timescale#6911 Fix dropped chunk metadata removal in update script * timescale#6940 Fix `pg_upgrade` failure by removing `regprocedure` from catalog table * timescale#6957 Fix segfault in UNION queries with ordering on compressed chunks **Thanks** * @DiAifU, @kiddhombre and @intermittentnrg for reporting issues with gapfill and daylight saving time * @edgarzamora for reporting issue with update triggers * @hongquan for reporting an issue with the update script * @iliastsa and @SystemParadox for reporting an issue with COPY into a compressed chunk
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the 2.14.2 release. We recommend that you upgrade at the next available opportunity. **Bugfixes** * timescale#6540 Segmentation fault when backfilling data with COPY into a compressed chunk * timescale#6858 Before update trigger not working correctly * timescale#6908 Fix gapfill with timezone behaviour around dst switches * timescale#6911 Fix dropped chunk metadata removal in update script * timescale#6940 Fix `pg_upgrade` failure by removing `regprocedure` from catalog table * timescale#6957 Fix segfault in UNION queries with ordering on compressed chunks **Thanks** * @DiAifU, @kiddhombre and @intermittentnrg for reporting issues with gapfill and daylight saving time * @edgarzamora for reporting issue with update triggers * @hongquan for reporting an issue with the update script * @iliastsa and @SystemParadox for reporting an issue with COPY into a compressed chunk
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This release contains performance improvements and bug fixes since the 2.15.0 release. Best practice is to upgrade at the next available opportunity. **Migrating from self-hosted TimescaleDB v2.14.x and earlier** After you run `ALTER EXTENSION`, you must run [this SQL script](https://github.com/timescale/timescaledb-extras/blob/master/utils/2.15.X-fix_hypertable_foreign_keys.sql). For more details, see the following pull request [#6797](#6797). If you are migrating from TimescaleDB v2.15.0, no changes are required. **Bugfixes** * #6540: Segmentation fault when you backfill data using COPY into a compressed chunk. * #6858: `BEFORE UPDATE` trigger not working correctly. * #6908: Fix `time_bucket_gapfill()` with timezone behaviour around daylight savings time (DST) switches. * #6911: Fix dropped chunk metadata removal in the update script. * #6940: Fix `pg_upgrade` failure by removing `regprocedure` from the catalog table. * #6957: Fix the `segfault` in UNION queries that contain ordering on compressed chunks. **Thanks** * @DiAifU, @kiddhombre and @intermittentnrg for reporting the issues with gapfill and daylight saving time. * @edgarzamora for reporting the issue with update triggers. * @hongquan for reporting the issue with the update script. * @iliastsa and @SystemParadox for reporting the issue with COPY into a compressed chunk.
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This release contains bug fixes since the 2.15.0 release. We recommend that you upgrade at the next available opportunity. **Bugfixes** * timescale#6540 Segmentation fault when backfilling data with COPY into a compressed chunk * timescale#6858 Before update trigger not working correctly * timescale#6908 Fix gapfill with timezone behaviour around dst switches * timescale#6911 Fix dropped chunk metadata removal in update script * timescale#6940 Fix `pg_upgrade` failure by removing `regprocedure` from catalog table * timescale#6957 Fix segfault in UNION queries with ordering on compressed chunks **Thanks** * @DiAifU, @kiddhombre and @intermittentnrg for reporting issues with gapfill and daylight saving time * @edgarzamora for reporting issue with update triggers * @hongquan for reporting an issue with the update script * @iliastsa and @SystemParadox for reporting an issue with COPY into a compressed chunk
fabriziomello
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This release contains bug fixes since the 2.15.0 release. We recommend that you upgrade at the next available opportunity. **Bugfixes** * #6540 Segmentation fault when backfilling data with COPY into a compressed chunk * #6858 Before update trigger not working correctly * #6908 Fix gapfill with timezone behaviour around dst switches * #6911 Fix dropped chunk metadata removal in update script * #6940 Fix `pg_upgrade` failure by removing `regprocedure` from catalog table * #6957 Fix segfault in UNION queries with ordering on compressed chunks **Thanks** * @DiAifU, @kiddhombre and @intermittentnrg for reporting issues with gapfill and daylight saving time * @edgarzamora for reporting issue with update triggers * @hongquan for reporting an issue with the update script * @iliastsa and @SystemParadox for reporting an issue with COPY into a compressed chunk
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When advancing local time we might not actually advance the timestamp we process e.g. when we switch to DST in spring the local time advances by 1 hour but the UTC time stays the same. Therefore we need to keep advancing until we actually move forward.
Fixes: #6788