nastra commented on code in PR #7399:
URL: https://github.com/apache/iceberg/pull/7399#discussion_r1177361899
##########
spark/v3.4/spark/src/main/java/org/apache/iceberg/spark/data/SparkOrcValueReaders.java:
##########
@@ -170,6 +177,31 @@ public UTF8String nonNullRead(ColumnVector vector, int
row) {
}
}
+ private static class UUIDReader implements OrcValueReader<UTF8String> {
+ private static final ThreadLocal<ByteBuffer> BUFFER =
+ ThreadLocal.withInitial(
+ () -> {
+ ByteBuffer buffer = ByteBuffer.allocate(16);
+ buffer.order(ByteOrder.BIG_ENDIAN);
+ return buffer;
+ });
+
+ private static final UUIDReader INSTANCE = new UUIDReader();
+
+ private UUIDReader() {}
+
+ @Override
+ public UTF8String nonNullRead(ColumnVector vector, int row) {
+ BytesColumnVector bytesVector = (BytesColumnVector) vector;
+ ByteBuffer buffer = BUFFER.get();
+ buffer.rewind();
+ buffer.put(bytesVector.vector[row], bytesVector.start[row],
bytesVector.length[row]);
Review Comment:
yes the lengh here is always 16 of the UUID bytes array
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