[jira] [Created] (FLINK-34723) Parquet writer should restrict map keys to be not null

[Xingcan Cui (Jira)]

Xingcan Cui created FLINK-34723:
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             Summary: Parquet writer should restrict map keys to be not null
                 Key: FLINK-34723
                 URL: https://issues.apache.org/jira/browse/FLINK-34723
             Project: Flink
          Issue Type: New Feature
          Components: Formats (JSON, Avro, Parquet, ORC, SequenceFile)
    Affects Versions: 1.18.1, 1.19.0
            Reporter: Xingcan Cui


We got the following exception when reading a parquet file (with map types) 
generated by Flink.
{code:java}
Map keys must be annotated as required.{code}



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