rdblue commented on a change in pull request #1318:
URL: https://github.com/apache/iceberg/pull/1318#discussion_r469448459
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File path: api/src/main/java/org/apache/iceberg/ContentFile.java
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@@ -102,6 +102,18 @@
*/
List<Long> splitOffsets();
+ /**
+ * Returns the set of field IDs used for equality comparison, in equality
delete files.
+ * <p>
+ * An equality delete file may contain additional data fields that are not
used by equality
+ * comparison. The subset of columns in a delete file to be used in equality
comparison are
+ * tracked by ID. Extra columns can be used to reconstruct changes and
metrics from extra
Review comment:
I think it was intended. The second half of the sentence is "Metrics
from extra columns are used during job planning". We might be able to rephrase
it to avoid the double "extra columns", but I wanted to be clear that the
metrics are coming from the extra columns.
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