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  1. OASIS Open Data Protocol (OData) TC
  2. ODATA-1462

in operator should allow empty collection literals

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    Details

    • Type: New Feature
    • Status: New
    • Priority: Minor
    • Resolution: Unresolved
    • Affects Version/s: V4.01_OS
    • Fix Version/s: V4.01_ERRATA01
    • Component/s: ABNF
    • Labels:
      None
    • Environment:

      [Proposed]

       

    • Proposal:
      Hide

      Enable empty collections in a literal expression for an in expression:

      listExpr = OPEN BWS [primitiveLiteral BWS *( COMMA BWS primitiveLiteral BWS )] CLOSE

      Show
      Enable empty collections in a literal expression for an in expression: listExpr = OPEN BWS [primitiveLiteral BWS *( COMMA BWS primitiveLiteral BWS )]  CLOSE

      Description

      Currently, the ABNF requires that a collection literal used in an "in" clause requires at least one element:

       

      inExpr = RWS "in" RWS ( listExpr / commonExpr )

      listExpr = OPEN BWS primitiveLiteral BWS *( COMMA BWS primitiveLiteral BWS ) CLOSE

       

      There may be scenarios in which the user intends to provide an empty collection (for example, to reflect that there are no items selected in a drop-down list box). This should evaluate to false.

      Also, note that commonExpr may be empty, so it would seem we should have equal expressivity between commonExpr and listExpr

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            • Assignee:
              Unassigned
              Reporter:
              mikep Michael Pizzo
            • Watchers:
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              Dates

              • Created:
                Updated: