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branch-3.1: [fix](timezone) Fix incorrect DST handling #51454 - #52420
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Problem Summary:
before:
```sql
mysql> select/*+SET_VAR(debug_skip_fold_constant=true)*/ cast('2010-01-05 08:15:30Europe/London' as datetime);
+------------------------------------------------------+
| cast('2010-01-05 08:15:30Europe/London' as datetime) |
+------------------------------------------------------+
| 2010-01-05 15:15:30 |
+------------------------------------------------------+
1 row in set (0.19 sec)
```
now:
```sql
mysql> select/*+SET_VAR(debug_skip_fold_constant=true)*/ cast('2010-01-05 08:15:30Europe/London' as datetime);
+------------------------------------------------------+
| cast('2010-01-05 08:15:30Europe/London' as datetime) |
+------------------------------------------------------+
| 2010-01-05 16:15:30 |
+------------------------------------------------------+
1 row in set (0.12 sec)
```zclllyybb
commented
Jun 27, 2025
ContributorAuthor
run buildall |
doris-robot
commented
Jun 27, 2025
BE UT Coverage ReportIncrement line coverage Increment coverage report
|
morrySnow
approved these changes
Jun 28, 2025
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pick #51454