xishuaidelin commented on code in PR #26616:
URL: https://github.com/apache/flink/pull/26616#discussion_r2122906049
##########
flink-table/flink-table-planner/src/main/java/org/apache/flink/table/planner/plan/nodes/exec/stream/StreamExecLookupJoin.java:
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@@ -294,4 +355,47 @@ protected Transformation<RowData>
createSyncLookupJoinWithState(
transform.setStateKeyType(keySelector.getProducedType());
return transform;
}
+
+ private RowDataKeySelector getKeySelector(
+ boolean singleParallelism, int[] keys, ClassLoader classLoader,
RowType inputRowType) {
+ RowDataKeySelector keySelector;
+ if (singleParallelism) {
+ keySelector = EmptyRowDataKeySelector.INSTANCE;
+ } else {
+ // make it a deterministic asc order
+ Arrays.sort(keys);
Review Comment:
They are the index of upsertKey.
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