JingsongLi commented on a change in pull request #16096:
URL: https://github.com/apache/flink/pull/16096#discussion_r651412169
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File path:
flink-table/flink-table-planner-blink/src/main/java/org/apache/flink/table/planner/plan/metadata/FlinkMetadata.java
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@@ -238,4 +239,20 @@ ImmutableBitSet getUniqueGroups(
RelWindowProperties getWindowProperties(RelNode r,
RelMetadataQuery mq);
}
}
+
+ /** Metadata about which combinations of columns are change log upsert
identifiers. */
+ public interface ChangeLogUpsertKeys extends Metadata {
Review comment:
I think upsert is more intuitive.
Because:
- the downstream operators upsert optimization needs this.
- the downstream upsert sink needs this.
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