WeiZhong94 commented on a change in pull request #14775:
URL: https://github.com/apache/flink/pull/14775#discussion_r582663613
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File path: flink-python/pyflink/proto/flink-fn-execution.proto
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@@ -194,8 +194,11 @@ message UserDefinedAggregateFunctions {
// True if the count(*) agg is inserted by the planner.
bool count_star_inserted = 11;
+ // Whether has Group Window.
+ bool has_group_window = 12;
Review comment:
We can use `HasField` method in Python to check if the field exists.
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