aokolnychyi commented on code in PR #55518:
URL: https://github.com/apache/spark/pull/55518#discussion_r3785101803
##########
sql/catalyst/src/main/java/org/apache/spark/sql/connector/write/LogicalWriteInfo.java:
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@@ -65,4 +65,14 @@ default Optional<StructType> metadataSchema() {
throw new SparkUnsupportedOperationException(
"DATA_SOURCE_METADATA_SCHEMA_NOT_IMPLEMENTED", Map.of("class",
getClass().getName()));
}
+
+ /**
+ * the narrow schema for updates. Present only when the connector mixes in
+ * {@link SupportsColumnUpdates}.
+ *
+ * @since 4.3.0
+ */
+ default Optional<StructType> updateSchema() {
Review Comment:
This could technically also become `columnUpdateSchema()`, if we decide to
do the rename. It does indicate the schema of copied rows in CoW and reinserted
rows. One thing I don't like is that it is longer.
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