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https://issues.apache.org/jira/browse/HIVE-1771?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12928838#action_12928838
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John Sichi commented on HIVE-1771:
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Example of error currently given.
Caused by: org.apache.hadoop.hive.ql.metadata.HiveException: Unable to execute
method public org.apache.hadoop.io.LongWritable
org.apache.hadoop.hive.ql.udf.UDFRound.evaluate(org.apache.hadoop.hive.serde2.io.DoubleWritable)
on object org.apache.hadoop.hive.ql.udf.udfro...@7817bcd4 of class
org.apache.hadoop.hive.ql.udf.UDFRound with arguments
{Infinity:org.apache.hadoop.hive.serde2.io.DoubleWritable} of size 1
Note that MySQL ROUND doesn't have this problem since it makes the return type
match the arg type.
> ROUND(infinity) chokes
> ----------------------
>
> Key: HIVE-1771
> URL: https://issues.apache.org/jira/browse/HIVE-1771
> Project: Hive
> Issue Type: Bug
> Components: UDF
> Affects Versions: 0.6.0
> Reporter: John Sichi
> Assignee: John Sichi
> Fix For: 0.7.0
>
>
> Since 1-arg ROUND returns an integer, it's hard to fix this without either
> losing data (return NULL) or making a backwards-incompatible change (return
> DOUBLE instead of BIGINT).
> In any case, we should definitely fix 2-arg ROUND to preserve
> infinity/NaN/etc, since it is already returning double.
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