luoyuxia created FLINK-27374:
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Summary: Convert Hive's void type to Flink's string type
Key: FLINK-27374
URL: https://issues.apache.org/jira/browse/FLINK-27374
Project: Flink
Issue Type: Improvement
Reporter: luoyuxia
Currently, we don't support Hive's void type. But some Hive's udf call will
return void type such as nvl(null, null), then it'll throw 'Flink doesn't
support Hive primitive type void yet'.
For Hive's void type, we can convert it to Flink's string type internally to
avoid such case.
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