[DRAFT] Add TimestampWithOffset extension type
#558
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This commit adds a new `TimestampWithOffset` extension type that can be used to represent timestamps with per-row timezone information. It stores information in a `struct` with 2 fields, `timestamp=[T, "UTC"]`, where `T` can be any `arrow.TimeUnit` and `offset_minutes=int16`, which represents the offset in minutes from the UTC timestamp.
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Which issue does this PR close?
(TODO: create Github Issue if the [VOTE] succeeds)
No issue yet. This is still being discussed in the mailing list, and this PR is here for reference.
FORMAT Pull request: apache/arrow#48002
Rationale for this change
Please refer to the mailing list discussion (we'll send an e-mail with the proposal soon).
What changes are included in this PR?
This commit adds a new
TimestampWithOffsetextension type. This type represents a timestamp column that stores potentially different timezone offsets per value. The timestamp is stored in UTC alongside the original timezone offset in minutes.Are these changes tested?
Yes.
Are there any user-facing changes?
Yes, this is a new proposed canonical extension type.