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Posted to issues@hive.apache.org by "Sankar Hariappan (Jira)" <ji...@apache.org> on 2021/10/27 07:56:00 UTC
[jira] [Updated] (HIVE-25553) Support Map data-type natively in
Arrow format
[ https://issues.apache.org/jira/browse/HIVE-25553?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Sankar Hariappan updated HIVE-25553:
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Affects Version/s: 3.1.0
3.1.2
> 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
> Affects Versions: 3.1.0, 3.1.2
> Reporter: Adesh Kumar Rao
> Assignee: Sruthi Mooriyathvariam
> Priority: Major
> Labels: pull-request-available
> Fix For: 4.0.0
>
> Time Spent: 3h
> 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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