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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