[jira] [Commented] (DRILL-7491) Incorrect count() returned for complex types in parquet

["ASF GitHub Bot (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/DRILL-7491?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17014648#comment-17014648 ] 

ASF GitHub Bot commented on DRILL-7491:
---------------------------------------

ihuzenko commented on pull request #1955: DRILL-7491: Incorrect count() returned for complex types in parquet
URL: https://github.com/apache/drill/pull/1955
 
 
   # [DRILL-7491](https://issues.apache.org/jira/browse/DRILL-7491): Incorrect count() returned for complex types in parquet
   
   ## Description
   
   Convert ConvertCountToDirectScanPrule was applied to existing complex type columns with absent rowCount metadata. Returning ```Statistic.NO_COLUMN_STATS``` fixes the issue.  
   
 
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> Incorrect count() returned for complex types in parquet
> -------------------------------------------------------
>
>                 Key: DRILL-7491
>                 URL: https://issues.apache.org/jira/browse/DRILL-7491
>             Project: Apache Drill
>          Issue Type: Bug
>          Components: Functions - Drill, Functions - Hive, Storage - Parquet
>    Affects Versions: 1.16.0, 1.17.0
>            Reporter: Igor Guzenko
>            Assignee: Igor Guzenko
>            Priority: Major
>         Attachments: hive_alltypes.parquet
>
>
> To reproduce use the attached file for {{hive_alltypes.parquet}} (this is parquet file generated by Hive) and try count on columns *c13 - c15.*  For example, 
> {code:sql}
> SELECT count(c13) FROM dfs.tmp.`hive_alltypes.parquet`
> {code}
> *Expected result:* {color:green}3 {color}
> *Actual result:* {color:red}0{color}



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