rdblue commented on code in PR #9008:
URL: https://github.com/apache/iceberg/pull/9008#discussion_r1520419670
##########
api/src/main/java/org/apache/iceberg/expressions/Literals.java:
##########
@@ -501,19 +538,17 @@ public <T> Literal<T> to(Type type) {
return (Literal<T>) new TimeLiteral(timeMicros);
case TIMESTAMP:
- if (((Types.TimestampType) type).shouldAdjustToUTC()) {
- long timestampMicros =
- ChronoUnit.MICROS.between(
- EPOCH, OffsetDateTime.parse(value(),
DateTimeFormatter.ISO_DATE_TIME));
- return (Literal<T>) new TimestampLiteral(timestampMicros);
+ final TimestampType tsType = (TimestampType) type;
+ final String value = value().toString();
+ final java.time.temporal.Temporal valueAsTemporal;
+ if (tsType.shouldAdjustToUTC()) {
+ valueAsTemporal =
DateTimeUtil.isoTimestamptzToOffsetDateTime(value);
} else {
- long timestampMicros =
- ChronoUnit.MICROS.between(
- EPOCH,
- LocalDateTime.parse(value(),
DateTimeFormatter.ISO_LOCAL_DATE_TIME)
- .atOffset(ZoneOffset.UTC));
- return (Literal<T>) new TimestampLiteral(timestampMicros);
+ valueAsTemporal =
+
DateTimeUtil.isoTimestampToLocalDateTime(value).atOffset(ZoneOffset.UTC);
}
+ final long timestampUnits = tsType.unit().between(EPOCH,
valueAsTemporal);
Review Comment:
Another issue with using `Unit` is that this is splitting conversion logic
between `DateTimeUtil` and here. It should all move to `DateTimeUtil` and this
should just call `isoTimestamp[tz]ToNanos` or isoTimestamp[tz]ToMicros`.
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