rdblue commented on code in PR #12836:
URL: https://github.com/apache/iceberg/pull/12836#discussion_r2051001564
##########
parquet/src/main/java/org/apache/iceberg/parquet/ParquetValueReaders.java:
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@@ -322,6 +333,88 @@ public void setPageSource(PageReadStore pageStore) {
}
}
+ private static class RowIdReader implements ParquetValueReader<Long> {
+ private final long firstRowId;
+ private final ParquetValueReader<Long> idReader;
+ private long rowOffset = -1;
+ private long rowGroupStart;
+
+ private RowIdReader(long firstRowId, ParquetValueReader<Long> idReader) {
+ this.firstRowId = firstRowId;
+ this.idReader = idReader != null ? idReader : nulls();
+ }
+
+ @Override
+ public Long read(Long reuse) {
+ rowOffset += 1;
+
+ Long idFromFile = idReader.read(null);
+ if (idFromFile != null) {
+ return idFromFile;
+ }
+
+ return firstRowId + rowGroupStart + rowOffset;
Review Comment:
You're right, I think that's cleaner.
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