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


Michael Pizzo created ODATA-1032:
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             Summary: 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: OData URL Conventions
    Affects Versions: V4.01_CSD01, V4.0_CSD03
            Reporter: 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: False
INF > INF: False
INF >= INF: False
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: False
-INF > -INF: False
-INF >= -INF: False
-INF < <valid number>: True
-INF <= <valid number>: True
-INF > <valid number>: False
-INF >= <valid number>: False
-INF > INF: False




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