beetle0915 commented on code in PR #28987:
URL: https://github.com/apache/flink/pull/28987#discussion_r4307717034
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flink-table/flink-table-api-java/src/main/java/org/apache/flink/table/operations/utils/OperationTreeBuilder.java:
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@@ -242,13 +242,22 @@ public QueryOperation dropColumns(List<Expression>
fieldLists, QueryOperation ch
return project(finalFields, child, false);
}
+ public List<Expression> expandExpressions(List<Expression> expressions,
QueryOperation child) {
Review Comment:
Updated. The grouping expansion, aggregation, grouping-reference
replacement, and projection are now coordinated by aggregateAndProject /
windowAggregateAndProject in OperationTreeBuilder. The generic project method
remains unchanged.
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