aokolnychyi commented on a change in pull request #3984:
URL: https://github.com/apache/iceberg/pull/3984#discussion_r799879786
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File path: core/src/main/java/org/apache/iceberg/io/PositionDeltaWriter.java
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@@ -41,6 +41,21 @@
*/
void insert(T row, PartitionSpec spec, StructLike partition);
+ /**
+ * Inserts a new version of an existing row to the provided spec/partition.
+ * <p>
+ * This method allows writers to distinguish new and updated records. The
caller must separately
+ * invoke {@link #delete(CharSequence, long, PartitionSpec, StructLike)} for
the original
+ * row position that is being updated.
+ *
+ * @param row a new version of an existing row
+ * @param spec a new partition spec
+ * @param partition a new partition or null if the spec is unpartitioned
+ */
+ default void update(T row, PartitionSpec spec, StructLike partition) {
Review comment:
Created #4042.
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