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Posted to dev@hive.apache.org by "Adesh Kumar Rao (Jira)" <ji...@apache.org> on 2021/09/24 07:08:00 UTC

[jira] [Created] (HIVE-25553) Support Map data-type in Arrow format

Adesh Kumar Rao created HIVE-25553:
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             Summary: Support Map data-type in Arrow format
                 Key: HIVE-25553
                 URL: https://issues.apache.org/jira/browse/HIVE-25553
             Project: Hive
          Issue Type: Improvement
          Components: llap, Serializers/Deserializers
            Reporter: Adesh Kumar Rao
            Assignee: Adesh Kumar Rao
             Fix For: 4.0.0


Currently ArrowColumnarBatchSerDe converts map datatype as a list of structs data-type (where stuct is containing the key-value pair of the map). This causes issues when reading Map datatype using llap-ext-client as it reads a list of structs instead. 

HiveWarehouseConnector which uses the llap-ext-client throws exception when the schema (containing Map data type) is different from actual data (list of structs).

 

Fixing this issue requires upgrading arrow version (where map data-type is supported), modifying ArrowColumnarBatchSerDe and corresponding Serializer/Deserializer to not use list as a workaround for map and use the arrow map data-type instead. 



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