xuyangzhong commented on code in PR #24179:
URL: https://github.com/apache/flink/pull/24179#discussion_r1466282357
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flink-table/flink-table-planner/src/main/java/org/apache/flink/table/planner/hint/FlinkHints.java:
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@@ -52,10 +52,13 @@ public abstract class FlinkHints {
// ~ Internal alias tag hint
public static final String HINT_ALIAS = "ALIAS";
- // ~ Option name for hints on join or correlate
+ // ~ Option name for hints on BiRel like join or correlate
public static final String LEFT_INPUT = "LEFT";
public static final String RIGHT_INPUT = "RIGHT";
+ // ~ Option name for hints on SingleRel like aggregate
+ public static final String INPUT = "INPUT";
Review Comment:
Agree!
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