pvary commented on code in PR #14435:
URL: https://github.com/apache/iceberg/pull/14435#discussion_r2769617041
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api/src/main/java/org/apache/iceberg/actions/RewriteDataFiles.java:
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@@ -147,6 +147,32 @@ public interface RewriteDataFiles
*/
String OUTPUT_SPEC_ID = "output-spec-id";
+ /**
+ * Use Parquet row-group level merging during rewrite operations when
applicable.
+ *
+ * <p>When enabled, Parquet files will be merged at the row-group level by
directly copying row
Review Comment:
How would you make a decision around this? Any normal files could have a
small rowgroup at the end.
Shall we make a threshold, like the average rowgroup size should be greater
than that?
I would suggest that add this later in a different PR if we decide that we
need this.
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