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From "Dag H. Wanvik (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (DERBY-6083) Update minimum/maximum floating-point values to align with DERBY-3398 fixes
Date Fri, 22 Feb 2013 03:12:12 GMT

    [ https://issues.apache.org/jira/browse/DERBY-6083?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13583860#comment-13583860
] 

Dag H. Wanvik commented on DERBY-6083:
--------------------------------------

One item: I am not sure if this has been discussed in out docs anywhere: Derby normalizes
-0.0 to positive 0.0.
Although it can be deduced from what we say, it may be helpful to point out that we throw
an exception if we calculate or try to store  NaN or +/- inifinity too (as defined by IEEE
754 and represented with named constants in Java, e.g. Double.NaN).
                
> Update minimum/maximum floating-point values to align with DERBY-3398 fixes
> ---------------------------------------------------------------------------
>
>                 Key: DERBY-6083
>                 URL: https://issues.apache.org/jira/browse/DERBY-6083
>             Project: Derby
>          Issue Type: Task
>          Components: Documentation
>    Affects Versions: 10.10.0.0
>            Reporter: Kim Haase
>            Assignee: Kim Haase
>            Priority: Minor
>         Attachments: DERBY-6083.diff, DERBY-6083.stat, DERBY-6083.zip
>
>
> The limits for floating-point values have changed as a result of DERBY-3398 and should
be documented:
> Smallest DOUBLE: 4.9e-324 (aka Double.MIN_VALUE)
> Largest DOUBLE: 1.7976931348623157e+308 (aka Double.MAX_VALUE)
> Smallest positive DOUBLE: 2.2250738585072014E-308 (aka Double.MIN_NORMAL)
> Largest negative DOUBLE: -2.2250738585072014E-308
> Smallest REAL: 1.4e-45 (aka Float.MIN_VALUE)
> Largest REAL: 3.4028235e+38 (aka Float.MAX_VALUE)
> Smallest positive REAL: 1.17549435E-38 (aka Float.MIN_NORMAL)
> Largest negative REAL: -1.17549435E-38 

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