[jira] [Updated] (DRILL-5237) FlattenRecordBatch loses nested fields from the schema when returns empty batches for the first time

["Serhii Harnyk (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/DRILL-5237?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Serhii Harnyk updated DRILL-5237:
---------------------------------
    Summary: FlattenRecordBatch loses nested fields from the schema when returns empty batches for the first time  (was: FlattenRecordBatch loses nested fields from the schema when returns empty batches at first time)

> FlattenRecordBatch loses nested fields from the schema when returns empty batches for the first time
> ----------------------------------------------------------------------------------------------------
>
>                 Key: DRILL-5237
>                 URL: https://issues.apache.org/jira/browse/DRILL-5237
>             Project: Apache Drill
>          Issue Type: Bug
>            Reporter: Serhii Harnyk
>            Assignee: Serhii Harnyk
>         Attachments: test_data.tar.gz
>
>
> Query 
> {code:sql}
> select count(*) as col from (select t1.a.a1 from (select t.*, flatten(t.b) as b from dfs.`/tmp/test_data` t where t.c is not null) t1 where t1.a .a1 like 'a1');
> {code}
> returns different results for different values for option planner.width.max_per_node
> With options 
> {code:sql}
> alter session set `planner.slice_target` = 1;
> alter session set `planner.width.max_per_node` = 1;
> {code}
> query returns correct result:
> {noformat}
> +------+
> | col  |
> +------+
> | 3    |
> +------+
> {noformat}
> but with options 
> {code:sql}
> alter session set `planner.slice_target` = 1;
> alter session set `planner.width.max_per_node` = 3;
> {code}
> the same query returns wrong result 
> {noformat}
> +------+
> | col  |
> +------+
> | 2    |
> +------+
> {noformat}



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