[OASIS Issue Tracker] (ODATA-1506) Allow index segments in path expressions

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

Ralf Handl created ODATA-1506:
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             Summary: Allow index segments in path expressions
                 Key: ODATA-1506
                 URL: https://issues.oasis-open.org/browse/ODATA-1506
             Project: OASIS Open Data Protocol (OData) TC
          Issue Type: New Feature
          Components: ABNF, URL Conventions
    Affects Versions: V4.01_OS
         Environment: Proposed
            Reporter: Ralf Handl
             Fix For: V4.02_WD01


OData already allows numeric index segments for ordered collections in the path part of the URL, see ODATA-820.

Allow this also inÂ[Path Expressions|https://docs.oasis-open.org/odata/odata/v4.01/os/part2-url-conventions/odata-v4.01-os-part2-url-conventions.html#sec_PathExpressions]:
{code:java}
GET Entries?$expand=components($orderby=name))&$orderby=components/0/name
{code}

Note: the index in {{$orderby}} is evaluated on the implicit server-defined order of the {{components}} as {{$orderby}} has to be evaluated _before_ {{$expand}}. This is somewhat counter-intuitive.



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