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https://issues.apache.org/jira/browse/DRILL-7518?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17012366#comment-17012366
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David Severski commented on DRILL-7518:
---------------------------------------
Can confirm that my previously failing parquet file can now be queried with the
apache/drill:master docker image (built after this was merged). Thanks to
everyone for the speedy diagnosis and fix!
> Parquet INT64 Nullable Type Support
> -----------------------------------
>
> Key: DRILL-7518
> URL: https://issues.apache.org/jira/browse/DRILL-7518
> Project: Apache Drill
> Issue Type: Bug
> Affects Versions: 1.17.0
> Environment: Tested on the apache/drill:1.17.0 docker image.
> Reporter: David Severski
> Assignee: Arina Ielchiieva
> Priority: Major
> Labels: ready-to-commit
> Fix For: 1.18.0
>
>
> Querying a parquet file with fields of type INT64 generates an immediate
> error in the complex parquet reader with an error of "Unsupported nullable
> converted type INT_64 for primitive type INT64". Attempts to work around this
> via explicit CAST() and CONVERT_FROM() are unsuccessful. The suggestion from
> drill-users is that an implementation needs to be made at
> https://github.com/apache/drill/blob/9993fa3547b029db5fe33a2210fa6f07e8ac1990/exec/java-exec/src/main/java/org/apache/drill/exec/store/parquet/columnreaders/ColumnReaderFactory.java#L303.
>
> If related, a similar INT32 type field in the same file exhibits this
> problem, but can be worked around via an explicit CAST() to INT.
>
> At this time, I do not have a sanitized parquet file to submit as a reference
> example. :(
>
> Reference thread on drill-users list:
> http://mail-archives.apache.org/mod_mbox/drill-user/202001.mbox/%3ccajguoa53ldkxqsh1fsvtj+dk5421eg4aw4paim++8bferxd...@mail.gmail.com%3e
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