davidradl commented on code in PR #27099:
URL: https://github.com/apache/flink/pull/27099#discussion_r2419069613
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flink-table/flink-table-planner/src/main/java/org/apache/flink/table/planner/plan/nodes/exec/stream/StreamExecDeltaJoin.java:
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@@ -233,11 +236,17 @@ protected Transformation<RowData> translateToPlanInternal(
RowDataKeySelector leftJoinKeySelector =
KeySelectorUtil.getRowDataSelector(
classLoader, leftJoinKeys,
InternalTypeInfo.of(leftStreamType));
+ // currently, delta join only supports to consume INSERT-ONLY stream
Review Comment:
nit: to consume -> consuming
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