Joris Van den Bossche created ARROW-13247:
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Summary: [C++] Kernel to convert timestamp with timezone to
another timezone (metadata-only change)
Key: ARROW-13247
URL: https://issues.apache.org/jira/browse/ARROW-13247
Project: Apache Arrow
Issue Type: Improvement
Reporter: Joris Van den Bossche
Related to ARROW-13033, but assuming you already have a tz-aware "timestamp
with timezone" type, and you want to change it to have another timezone.
In practice, this is a trivial, metadata-only change since in both cases the
actual values are stored in UTC, and so it's only changing the tz
parametrization of the timestamp type. But, for convenience, I think it would
still be useful to have it as an actual kernel to easily integrate this
operation in this framework.
References:
[tz_convert|https://pandas.pydata.org/pandas-docs/stable/reference/api/pandas.DatetimeIndex.tz_convert.html]
in pandas, or [with_tz|https://lubridate.tidyverse.org/reference/with_tz.html]
in R's lubridate package,{{withZone}} in Joda or
[withZoneSameInstant|https://docs.oracle.com/javase/8/docs/api/java/time/ZonedDateTime.html#withZoneSameInstant-java.time.ZoneId-]
in Java
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