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

["Sruthi Mooriyathvariam (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HIVE-25553?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Sruthi Mooriyathvariam reassigned HIVE-25553:
---------------------------------------------

    Assignee: Sruthi Mooriyathvariam  (was: Adesh Kumar Rao)

> Support Map data-type natively 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: Sruthi Mooriyathvariam
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: 4.0.0
>
>          Time Spent: 2h 10m
>  Remaining Estimate: 0h
>
> 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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