JingsongLi commented on a change in pull request #8977:
[FLINK-13071][table-planner-blink] QueryOperationConverter in Blink planner
support add kinds of QueryOperations.
URL: https://github.com/apache/flink/pull/8977#discussion_r300215015
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File path:
flink-table/flink-table-planner-blink/src/main/java/org/apache/flink/table/expressions/RexNodeConverter.java
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@@ -79,25 +112,196 @@
private final RelBuilder relBuilder;
Review comment:
> TODO actually we should use {@link ResolvedExpressionVisitor} here as it
is the output of the API
You can comment clear, why it keep `ExpressionVisitor` instead of
`ResolvedExpressionVisitor`.
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