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https://issues.apache.org/jira/browse/HIVE-17843?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16364282#comment-16364282
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Zoltan Ivanfi edited comment on HIVE-17843 at 2/14/18 3:34 PM:
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Sorry for the late answer. The simplest query suffices, e.g., a SELECT * on a
table that contains a single column and a single row. But the parquet file has
to have an unsigned integer in it and Hive does not write unsignes ints.
[~gszadovszky] could you provide an example parquet file with an unsigned int
that has its most significant bit set? Thanks!
was (Author: zi):
Sorry for the late answer. The simplest query suffices, e.g., a SELECT * on a
table that contains a single column and a single row. But the parquet file has
to have an unsigned integer in it and Hive does not write unsignes ints.
[~gszadovszky] could you provide an example parquet file with an unsigned int
that has its first bit set? Thanks!
> UINT32 Parquet columns are handled as signed INT32-s, silently reading
> incorrect data
> -------------------------------------------------------------------------------------
>
> Key: HIVE-17843
> URL: https://issues.apache.org/jira/browse/HIVE-17843
> Project: Hive
> Issue Type: Bug
> Reporter: Zoltan Ivanfi
> Assignee: Janaki Lahorani
> Priority: Major
>
> An unsigned 32 bit Parquet column, such as
> {noformat}
> optional int32 uint_32_col (UINT_32)
> {noformat}
> is read by Hive as if it were signed, leading to incorrect results.
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