rdblue commented on code in PR #11904:
URL: https://github.com/apache/iceberg/pull/11904#discussion_r1925927030
##########
parquet/src/main/java/org/apache/iceberg/data/parquet/GenericParquetReaders.java:
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@@ -49,47 +59,132 @@ public static ParquetValueReader<Record> buildReader(
@Override
protected ParquetValueReader<Record> createStructReader(
List<Type> types, List<ParquetValueReader<?>> fieldReaders, StructType
structType) {
- return new RecordReader(types, fieldReaders, structType);
+ return ParquetValueReaders.recordReader(types, fieldReaders, structType);
}
@Override
protected Object convertConstant(org.apache.iceberg.types.Type type, Object
value) {
return GenericDataUtil.internalToGeneric(type, value);
}
- private static class RecordReader extends StructReader<Record, Record> {
- private final GenericRecord template;
+ private static final OffsetDateTime EPOCH =
Instant.ofEpochSecond(0).atOffset(ZoneOffset.UTC);
+ private static final LocalDate EPOCH_DAY = EPOCH.toLocalDate();
- RecordReader(List<Type> types, List<ParquetValueReader<?>> readers,
StructType struct) {
- super(types, readers);
- this.template = struct != null ? GenericRecord.create(struct) : null;
+ protected static class DateReader extends
ParquetValueReaders.PrimitiveReader<LocalDate> {
+ protected DateReader(ColumnDescriptor desc) {
+ super(desc);
}
@Override
- protected Record newStructData(Record reuse) {
- if (reuse != null) {
- return reuse;
- } else {
- // GenericRecord.copy() is more performant then
GenericRecord.create(StructType) since
- // NAME_MAP_CACHE access
- // is eliminated. Using copy here to gain performance.
- return template.copy();
- }
+ public LocalDate read(LocalDate reuse) {
+ return EPOCH_DAY.plusDays(column.nextInteger());
+ }
+ }
+
+ protected static class TimestampReader
+ extends ParquetValueReaders.PrimitiveReader<LocalDateTime> {
+ protected TimestampReader(ColumnDescriptor desc) {
+ super(desc);
}
@Override
- protected Object getField(Record intermediate, int pos) {
- return intermediate.get(pos);
+ public LocalDateTime read(LocalDateTime reuse) {
+ return EPOCH.plus(column.nextLong(),
ChronoUnit.MICROS).toLocalDateTime();
+ }
+ }
+
+ protected static class TimestampMillisReader
+ extends ParquetValueReaders.PrimitiveReader<LocalDateTime> {
+ protected TimestampMillisReader(ColumnDescriptor desc) {
+ super(desc);
}
@Override
- protected Record buildStruct(Record struct) {
- return struct;
+ public LocalDateTime read(LocalDateTime reuse) {
+ return EPOCH.plus(column.nextLong() * 1000,
ChronoUnit.MICROS).toLocalDateTime();
+ }
+ }
+
+ protected static class TimestampInt96Reader
Review Comment:
I think this and the other classes should be package-private rather than
protected.
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