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https://issues.apache.org/jira/browse/DRILL-5797?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16194310#comment-16194310
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Damien Profeta commented on DRILL-5797:
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One improvement over this user story would be to enable the ParquetRecordReader
to read nested data but which are not repeated. However today, the
ParquetRecordReader is not able to read these columns because it cannot resolve
the name (it only look at the last part of it). If it is worth it, I will open
another US to improve 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: Damien Profeta
> Fix For: 1.12.0
>
>
> 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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