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https://issues.apache.org/jira/browse/HIVE-12080?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14966129#comment-14966129
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Mohammad Kamrul Islam commented on HIVE-12080:
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[~spena] : my comments:
1. DataWritableReadSupport is instantiated and later called prepareForRead()
from InternalParquetReader class that comes with parquet library. This class is
passed in class MapredParquetInputFormat. Yes it is confusing :)
2. Added more test cases and with a new file name.
4. I also thought of other types. We can start with this common type and can
extend to those in a separate JIRA.
Thanks again for the review. Also put the patch into review board.
> Support auto type widening for Parquet table
> --------------------------------------------
>
> Key: HIVE-12080
> URL: https://issues.apache.org/jira/browse/HIVE-12080
> Project: Hive
> Issue Type: New Feature
> Components: File Formats
> Reporter: Mohammad Kamrul Islam
> Assignee: Mohammad Kamrul Islam
> Attachments: HIVE-12080.1.patch
>
>
> Currently Hive+Parquet doesn't support it. It should include at least basic
> type promotions short->int->bigint, float->double etc, that are already
> supported for other file formats.
> There were similar effort (Hive-6784) but was not committed. This JIRA is to
> address the same in different way with little (no) performance impact.
>
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