[jira] [Commented] (DRILL-5797) Use more often the new parquet reader

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

    [ https://issues.apache.org/jira/browse/DRILL-5797?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16475765#comment-16475765 ] 

Arina Ielchiieva commented on DRILL-5797:
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[~okalinin] looked at the complex12.q as well. Got the same conclusions as you are. My understanding is that we need to rewrite {{ParquetSchema.fieldSelected}} method to choose correct column rather then two. Did you try that?

> Use more often the new parquet reader
> -------------------------------------
>
>                 Key: DRILL-5797
>                 URL: https://issues.apache.org/jira/browse/DRILL-5797
>             Project: Apache Drill
>          Issue Type: Improvement
>          Components: Storage - Parquet
>            Reporter: Damien Profeta
>            Assignee: Oleksandr Kalinin
>            Priority: Major
>             Fix For: 1.14.0
>
>
> The choice of using the regular parquet reader of the optimized one is based of what type of columns is in the file. But the columns that are read by the query doesn't matter. We can increase a little bit the cases where the optimized reader is used by checking is the projected column are simple or not.
> This is an optimization waiting for the fast parquet reader to handle complex structure.



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