chenjunjiedada commented on a change in pull request #1356:
URL: https://github.com/apache/iceberg/pull/1356#discussion_r497229622
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File path:
arrow/src/main/java/org/apache/iceberg/arrow/vectorized/VectorizedArrowReader.java
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@@ -354,6 +360,47 @@ public void setBatchSize(int batchSize) {
}
}
+ private static final class PositionVectorReader extends
VectorizedArrowReader {
+ private long rowStart;
+ private NullabilityHolder nulls;
+
+ @Override
+ public VectorHolder read(VectorHolder reuse, int numValsToRead) {
+ Field arrowField = ArrowSchemaUtil.convert(MetadataColumns.ROW_POSITION);
+ FieldVector vec =
arrowField.createVector(ArrowAllocation.rootAllocator());
+
+ if (reuse != null) {
+ vec.setValueCount(0);
+ nulls.reset();
+ } else {
+ ((BigIntVector) vec).allocateNew(numValsToRead);
+ for (int i = 0; i < numValsToRead; i += 1) {
+ vec.getDataBuffer().setLong(i * Long.BYTES, rowStart + i);
+ nulls = new NullabilityHolder(numValsToRead);
Review comment:
Thanks @holdenk, This is a problem. Let me move this out of the loop.
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