lidavidm commented on code in PR #37088:
URL: https://github.com/apache/arrow/pull/37088#discussion_r1288960693
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java/adapter/jdbc/src/main/java/org/apache/arrow/adapter/jdbc/JdbcToArrowUtils.java:
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@@ -188,12 +188,9 @@ public static ArrowType getArrowTypeFromJdbcType(final
JdbcFieldInfo fieldInfo,
case Types.TIME:
return new ArrowType.Time(TimeUnit.MILLISECOND, 32);
case Types.TIMESTAMP:
- final String timezone;
- if (calendar != null) {
- timezone = calendar.getTimeZone().getID();
- } else {
- timezone = null;
- }
+ return new ArrowType.Timestamp(TimeUnit.MILLISECOND);
+ case Types.TIMESTAMP_WITH_TIMEZONE:
+ final String timezone = calendar == null ? null :
calendar.getTimeZone().getID();
Review Comment:
In Arrow, the underlying representation for a timestamp with timezone is
always UTC. So if the driver is giving us UTC and converting it, we should
always bypass their conversion and construct a `timestamp[ms, UTC]`.
And yes, if there's no timezone, then it's a wall-clock time.
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