odata message

Subject: [OASIS Issue Tracker] Commented: (ODATA-76) Edm.Decimal is a floating-point type

From: OASIS Issues Tracker <workgroup_mailer@lists.oasis-open.org>
To: odata@lists.oasis-open.org
Date: Thu, 14 Feb 2013 03:26:55 -0500 (EST)

    [ http://tools.oasis-open.org/issues/browse/ODATA-76?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=32457#action_32457 ] 

Ralf Handl commented on ODATA-76:
---------------------------------

I understood Evan's comment cautioning against introducing a DECFLOAT equivalent, which is not widely used.

OData's Edm.Decimal can be represented as BigDecimal in Java, NSDecimalNumber in Objective-C, and decimal in C#. 

All of these are variable-scale, so introducing the VariableScale facet is no burden for these platforms.

And all monetary amounts in SAP Business Suite are fixed-precision and variable-scale, so if we limit Edm.Decimal to fixed-scale, we'd have to use Edm.Decimal with artificially large Precision and Scale values and tell clients via an annotation that "by the way, only half of the digits are actually used".

> Edm.Decimal is a floating-point type
> ------------------------------------
>
>                 Key: ODATA-76
>                 URL: http://tools.oasis-open.org/issues/browse/ODATA-76
>             Project: OASIS Open Data Protocol (OData) TC
>          Issue Type: Improvement
>          Components: OData CSDL v1.0
>    Affects Versions: WD01
>         Environment: [Proposed]
>            Reporter: Ralf Handl
>            Assignee: Michael Pizzo
>            Priority: Minor
>             Fix For: WD01
>
>
> The definition of the Scale facet as the maximum number of digits right of the decimal point implies that there may be less digits to the right and consequently more digits to the left of the decimal point (up to the value of the Precision facet), so the decimal point is allowed to float within the given Precision.

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