dongjoon-hyun commented on code in PR #55518:
URL: https://github.com/apache/spark/pull/55518#discussion_r3192402487
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sql/catalyst/src/main/java/org/apache/spark/sql/connector/write/RowLevelOperationInfo.java:
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@@ -37,4 +38,20 @@ public interface RowLevelOperationInfo {
* Returns the row-level SQL command (e.g. DELETE, UPDATE, MERGE).
*/
Command command();
+
+ /**
+ * Returns the columns being updated in an UPDATE statement, as non-identity
assignments.
+ *
+ * <p>For DELETE and MERGE, returns an empty array.
+ *
+ * <p>Connectors can use this to decide what {@link
RowLevelOperation#requiredDataAttributes()}
+ * to declare. For instance, a connector that needs its primary key for row
lookup can check
+ * whether pk is already in the updated columns list and, if not, add it to
+ * requiredDataAttributes().
+ *
+ * @since 4.2.0
Review Comment:
4.3.0
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