JingsongLi commented on a change in pull request #16096:
URL: https://github.com/apache/flink/pull/16096#discussion_r651411785
##########
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 {
+ Method METHOD = Types.lookupMethod(ChangeLogUpsertKeys.class,
"getChangeLogUpsertKeys");
+
+ MetadataDef<ChangeLogUpsertKeys> DEF =
+ MetadataDef.of(
+ ChangeLogUpsertKeys.class,
ChangeLogUpsertKeys.Handler.class, METHOD);
+
+ Set<ImmutableBitSet> getChangeLogUpsertKeys();
Review comment:
It is same to unique keys.
Consider rank, keys can be input unique keys and partitionKey + rank_number.
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