[OASIS Issue Tracker] (ODATA-1462) in operator should allow empty collection literals

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

Michael Pizzo created ODATA-1462:
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             Summary: in operator should allow empty collection literals
                 Key: ODATA-1462
                 URL: https://issues.oasis-open.org/browse/ODATA-1462
             Project: OASIS Open Data Protocol (OData) TC
          Issue Type: New Feature
          Components: ABNF
    Affects Versions: V4.01_OS
         Environment: [Proposed]

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            Reporter: Michael Pizzo
             Fix For: V4.01_ERRATA01


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

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

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

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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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