wangsan created FLINK-10770:
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Summary: Some generated functions are not opened properly.
Key: FLINK-10770
URL: https://issues.apache.org/jira/browse/FLINK-10770
Project: Flink
Issue Type: Bug
Components: Table API & SQL
Affects Versions: 1.6.2, 1.7.0
Reporter: wangsan
Recently I found sometimes UDFs are not open properly. It turns out when
transforming sql to execution plan, some generated functions' *open* method are
not called. e.g. *NonWindowJoin*, *TimeBoundedStreamJoin*, *FlatJoinRunner*.
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