If some functionality is not supported then OData should return status code 501 instead of 500 ---------------------------------------------------------------------------------------------- Key: TEIID-4043 URL: https://issues.jboss.org/browse/TEIID-4043 Project: Teiid Issue Type: Sub-task Components: OData Reporter: Juraj Duráni Assignee: Ramesh Reddy Fix For: 9.0, 8.12.5 *URLs:* - http://localhost:8080/odata4/olingo_basic/Source/Customers/?$expand=Order... - http://localhost:8080/odata4/olingo_basic/Source/Customers/?$expand=Order... - http://localhost:8080/odata4/olingo_basic/Source/Customers/?$expand=Order... - http://localhost:8080/odata4/olingo_basic/Source/Customers/?$expand=Order... None of these options is implemented, but OData service for every request returns status code 500.