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  1. OASIS Open Data Protocol (OData) TC
  2. ODATA-557

Allow exponential notation for Edm.Decimal

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    • Proposal:
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      Allow exponential notation for Edm.Decimal literals.

      Add new symbolic value Scale="floating" for DECFLOAT values. The Precision attribute will specify the number of digits in the mantissa.

      Services would only allow scale="floating" for 4.01 and later versions of metadata,

      For 4.01 JSON payloads, exponential decimals is always assumed and format parameter is not needed or used.

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      Allow exponential notation for Edm.Decimal literals. Add new symbolic value Scale="floating" for DECFLOAT values. The Precision attribute will specify the number of digits in the mantissa. Services would only allow scale="floating" for 4.01 and later versions of metadata, For 4.01 JSON payloads, exponential decimals is always assumed and format parameter is not needed or used.
    • Resolution:
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      https://tools.oasis-open.org/version-control/browse/wsvn/odata/trunk/4.01%20spec/schemas/edm.xsd?op=diff&rev=941

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      https://tools.oasis-open.org/version-control/browse/wsvn/odata/trunk/4.01%20spec/schemas/edm.xsd?op=diff&rev=941

      Description

      IEEE754 also defines the DECFLOAT data type for high-precision decimal arithmetic. They have 16 or 34 decimal digit mantissas and exponents between -383 and +384 or -6143 and +6144.

      Representing them exactly in current Edm.Decimal would result in at most 34 non-zero digits and several thousand zeroes. This waste can easily be avoided by allowing exponential notation also for Edm.Decimal.

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            • Assignee:
              handl Ralf Handl
              Reporter:
              handl Ralf Handl
            • Watchers:
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              • Created:
                Updated:
                Resolved: