tpgillam opened a new issue, #327:
URL: https://github.com/apache/arrow-julia/issues/327
It seems like the ArrowTypes representation of ZonedDateTime doesn't include
enough information to resolve ambiguities around DST, e.g.:
```julia
julia> zdt = ZonedDateTime(DateTime(2020, 11, 1, 6), tz"America/New_York";
from_utc=true)
2020-11-01T01:00:00-05:00
julia> arrow_zdt = ArrowTypes.toarrow(zdt)
Arrow.Timestamp{Arrow.Flatbuf.TimeUnits.MILLISECOND,
Symbol("America/New_York")}(1604192400000)
julia> ArrowTypes.fromarrow(ZonedDateTime, arrow_zdt)
ERROR: AmbiguousTimeError: Local DateTime 2020-11-01T01:00:00 is ambiguous
within America/New_York
Stacktrace:
[1] (::TimeZones.var"#construct#8"{DateTime,
VariableTimeZone})(T::Type{Local})
@ TimeZones
~/.julia/packages/TimeZones/X0cjt/src/types/zoneddatetime.jl:46
[2] #ZonedDateTime#7
@ ~/.julia/packages/TimeZones/X0cjt/src/types/zoneddatetime.jl:50
[inlined]
[3] ZonedDateTime
@ ~/.julia/packages/TimeZones/X0cjt/src/types/zoneddatetime.jl:37
[inlined]
[4] convert(#unused#::Type{ZonedDateTime},
x::Arrow.Timestamp{Arrow.Flatbuf.TimeUnits.MILLISECOND,
Symbol("America/New_York")})
@ Arrow ~/.julia/packages/Arrow/ZlMFU/src/eltypes.jl:265
[5] fromarrow(#unused#::Type{ZonedDateTime},
x::Arrow.Timestamp{Arrow.Flatbuf.TimeUnits.MILLISECOND,
Symbol("America/New_York")})
@ Arrow ~/.julia/packages/Arrow/ZlMFU/src/eltypes.jl:300
[6] top-level scope
@ REPL[16]:1
```
Knowing very little about how how we're constrained within the arrow spec,
can this be fixed by storing the UTC timestamp? I'm _guessing_ we're running
into this as we're storing a local timestamp + the timezone (?), which isn't
quite enough information.
--
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
To unsubscribe, e-mail: issues-unsubscr...@arrow.apache.org.apache.org
For queries about this service, please contact Infrastructure at:
us...@infra.apache.org
