[OASIS Issue Tracker] (ODATA-1032) Define comparison for numeric value exceptions

[OASIS Issues Tracker <workgroup_mailer@lists.oasis-open.org>]

     [ https://issues.oasis-open.org/browse/ODATA-1032?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Ralf Handl updated ODATA-1032:
------------------------------

    Environment: Applied  (was: [Proposed])

> Define comparison for numeric value exceptions
> ----------------------------------------------
>
>                 Key: ODATA-1032
>                 URL: https://issues.oasis-open.org/browse/ODATA-1032
>             Project: OASIS Open Data Protocol (OData) TC
>          Issue Type: Bug
>          Components: URL Conventions
>    Affects Versions: V4.01_CSD01, V4.0_CSD03
>         Environment: Applied
>            Reporter: Michael Pizzo
>            Assignee: Michael Pizzo
>             Fix For: V4.01_CSD02
>
>
> We describe comparison operations with null, but not with NaN, -INF and INF.
> For NaN IEEE754, says that NaN is unordered and not equal to itself, meaning that NaN compared to anything, including NaN, is false except for != which is true.
> This makes sense mathematically; however, this makes it very hard to find all resources with a property value of NaN (we would have to add a separate IsNaN() operator, and comparisons would have to account for this in their expressions).  We could say that NaN==NaN, similar to how we say Null==Null to make it easier to search for Null values.
> For INF, -INF, IEEE754 appears to define INF==INF and -INF==-INF, so we would have:
> INF == INF: True
> INF != INF: False
> INF < INF: False
> INF <= INF: True
> INF > INF: False
> INF >= INF: True
> INF < <valid number>: False
> INF <= <valid number>: False
> INF > <valid number: True
> INF >= <valid number>: True
> INF > -INF: True
> -INF == -INF: True
> -INF != -INF: False
> -INF < -INF: False
> -INF <= -INF: True
> -INF > -INF: False
> -INF >= -INF: Tru
> -INF < <valid number>: True
> -INF <= <valid number>: True
> -INF > <valid number>: False
> -INF >= <valid number>: False
> -INF > INF: False



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