jianguotian commented on code in PR #9702:
URL: https://github.com/apache/paimon/pull/9702#discussion_r3985693023
##########
paimon-common/src/main/java/org/apache/paimon/data/columnar/ColumnarRowIterator.java:
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@@ -115,6 +115,10 @@ public ColumnarRowIterator copy(ColumnVector[] vectors) {
public ColumnarRowIterator mapping(
@Nullable PartitionInfo partitionInfo, @Nullable int[]
indexMapping) {
+ if (partitionInfo == null && isIdentityMapping(indexMapping,
row.batch().getArity())) {
+ return this;
Review Comment:
Fixed. `DataFileRecordReader` now isolates the reader-owned column array
before installing row-tracking vectors on an identity-mapped reusable batch,
while preserving the iterator subtype and recycler. Added repeated-batch
regression coverage; targeted tests pass on JDK 8 and JDK 11.
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