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From "Craig L Russell (JIRA)" <j...@apache.org>
Subject [jira] Commented: (JDO-643) avg return type
Date Sun, 12 Dec 2010 19:54:01 GMT

    [ https://issues.apache.org/jira/browse/JDO-643?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12970635#action_12970635

Craig L Russell commented on JDO-643:

I'd like to see this changed as well. Can someone write up what the return type should be
for all of the numeric types that JDO supports?

I don't think it's obvious that double is the right type for average of BigInteger or BigDecimal.
And what about float?

> avg return type
> ---------------
>                 Key: JDO-643
>                 URL: https://issues.apache.org/jira/browse/JDO-643
>             Project: JDO
>          Issue Type: Bug
>          Components: specification
>    Affects Versions: JDO 2 maintenance release 2
>            Reporter: Guido Anzuoni
>            Assignee: Michael Bouschen
>             Fix For: JDO 3 maintenance release 1
> Aggregate type specification at page 175 claims that avg(expression) return type is the
same of the enclosed expression.
> This is wrong from a strictly mathematical point of view.
> In fact, if you select an avg on an int field member the result is truncated.
> The result type should always be double.

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