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https://issues.apache.org/jira/browse/DERBY-3874?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12633640#action_12633640
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Knut Anders Hatlen commented on DERBY-3874:
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> Should returning positive zero instead of negative zero be considered a bug?
> Are we able to separate between the two in Derby today?
I'm not sure if it's a bug or not (I didn't find any mentioning of negative
zero in the SQL standard), but it doesn't seem like Derby separates between the
two. For instance, VALUES -0.0 returns 0.0. There is however a bug report about
an intermittent test failure where a query results in -0.0 instead of 0.0. See
DERBY-2447.
> Why are we not allowing NaN and Infinity?
There's a discussion about this in DERBY-3290.
> Document numeric function ATAN2(float1,float2)
> ----------------------------------------------
>
> Key: DERBY-3874
> URL: https://issues.apache.org/jira/browse/DERBY-3874
> Project: Derby
> Issue Type: Sub-task
> Components: Documentation
> Affects Versions: 10.5.0.0
> Reporter: Kristian Waagan
> Assignee: Kim Haase
>
> Document the numeric function ATAN2(float1,float2).
> Mentioned in the JDBC specification, appendix C.1.
> Implementation documented by the JavaDoc for StrictMath.atan2.
> According to the JDBC specification, table B-1, a JDBC float maps to a Java
> double.
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