rdblue commented on code in PR #6002:
URL: https://github.com/apache/iceberg/pull/6002#discussion_r1002749735
##########
core/src/main/java/org/apache/iceberg/ManifestEntry.java:
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@@ -118,6 +124,27 @@ default boolean isLive() {
@Deprecated
void setSequenceNumber(long sequenceNumber);
+ /**
+ * Returns the file sequence number.
+ *
+ * <p>The file sequence number represents the sequence number of the
snapshot in which the
+ * underlying file was added. The file sequence number is always assigned at
commit and cannot be
+ * provided explicitly, unlike the data sequence number. The file sequence
number does not change
+ * upon assigning and must be preserved in existing and deleted entries.
+ *
+ * <p>This method can return null if the file sequence number is unknown.
This may happen while
+ * reading a v2 manifest that did not persist the file sequence number for
manifest entries with
+ * status EXISTING or DELETED (older Iceberg versions).
+ */
+ Long fileSequenceNumber();
Review Comment:
We already use `dataSequenceNumber` / `sequenceNumber` in scan planning. We
just renamed how it was referenced in core recently. If we choose to expose
these on `ContentFile` that's fine, but something we should do in a separate PR.
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