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https://issues.apache.org/jira/browse/HIVE-12080?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14963816#comment-14963816
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Ryan Blue commented on HIVE-12080:
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I like option #2 the best.
I'd also point out, though, that rather than having an if statement for option
1, we should instead push that to the writable object. Basically, add a
NumericWritable interface that defines getInt, getLong, getFloat, etc. and call
the correct one depending on the object inspector.
> 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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