[jira] [Updated] (DRILL-7313) Use Hive schema for MaprDB native reader when field was empty and support all text mode

["Arina Ielchiieva (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/DRILL-7313?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Arina Ielchiieva updated DRILL-7313:
------------------------------------
    Issue Type: Improvement  (was: Task)
       Summary: Use Hive schema for MaprDB native reader when field was empty and support all text mode  (was: Use Hive schema for MaprDB native reader when field was empty)

> Use Hive schema for MaprDB native reader when field was empty and support all text mode
> ---------------------------------------------------------------------------------------
>
>                 Key: DRILL-7313
>                 URL: https://issues.apache.org/jira/browse/DRILL-7313
>             Project: Apache Drill
>          Issue Type: Improvement
>    Affects Versions: 1.16.0
>            Reporter: Volodymyr Vysotskyi
>            Assignee: Volodymyr Vysotskyi
>            Priority: Major
>              Labels: doc-impacting, ready-to-commit
>             Fix For: 1.17.0
>
>
> Currently, when an external Hive MaprDB table is queried using hive plugin with enabled {{store.hive.maprdb_json.optimize_scan_with_native_reader}}, some queries may fail due to soft schema change, though Hive knows actual data types.
> For example, when we have a table with several fields, and one of them has only several non-null values, queries with grouping by such field will fail due to schema change.
> The goal of this Jira is to allow using types from Hive when a non-existing field is created, so it will allow avoiding such issues.



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