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Subject: [OASIS Issue Tracker] Commented: (ODATA-36) Make $expand implicit if navigation properties are mentioned in $select or $aggregate

    [ http://tools.oasis-open.org/issues/browse/ODATA-36?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=31523#action_31523 ] 

Michael Pizzo commented on ODATA-36:

This seems really wrong to me. 

The $select expresses a projection; it doesn't change the membership, just what is reported about each member. It is optional (the service can ignore the $select and pass additional fields.

$filter controls the membership and is not optional. If you specify $filter, you assume results meet the specified criteria and if the service returns additional results then client side logic is likely to make bad choices (i.e., if you $filter for underperformers in order to execute the "Fire()" operation you don't want the service to silently return your high performers as well.)

> Make $expand implicit if navigation properties are mentioned in $select or $aggregate
> -------------------------------------------------------------------------------------
>                 Key: ODATA-36
>                 URL: http://tools.oasis-open.org/issues/browse/ODATA-36
>             Project: OASIS Open Data Protocol (OData) TC
>          Issue Type: Improvement
>          Components: OData Protocol v1.0, OData URL Conventions v1.0
>    Affects Versions: WD01
>         Environment: [Proposed]
>            Reporter: Martin Zurmuehl
>            Priority: Minor
>             Fix For: WD01
> Currently clients need to repeat themselves when projecting on expanded entities:
> GET http://services.odata.org/OData/OData.svc/Products?$select=*,Category/Name&$expand=Category
> This could be reduced to 
> GET http://services.odata.org/OData/OData.svc/Products?$select=*,Category/Name
> because the client explicitly requests Category/Name, and the server can only satisfy that if it expands the Category.

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