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Kapsel DB and Delta Query Support

Howdy fellow SAPers, I've come yet again with a new question for you guys.

Currently I've got a question regarding the usage of expanded_entityset.

I'm aware that the usage of $expand and Delta is not supported according to this document: How to Implement Basic Delta Query Support in SAP NetWeaver Gateway

I'm not sure how does Kaspel works, but basically we're trying to understand if we have the option to insert our logic into the tool or we're stuck with the standar. We've have a few doubts on how does Kaspel and PouchDB work for Deltas since we're trying to find a work around to perform the delta tracking for our offline store.

Our first question is that if there's a restriction that Kaspel will recognize only the GET_DELTA_ENTITYSET method when the URI contains a deltatoken.or if it's possible to define the way the URI should be structured/used in case a deltatoken is sent.

The reason is, we use expanded EntitySet for our requirement since we need to fetch all the information from all the associated clients to a sales person in one go, if we pass a delta token in the request, we noticed that expand has a "higher" priority then the Delta Token, so it calls the GET_EXPANDED_ENTITYSET instead of DELTA_ENTITYSET. At this point, we have managed to generate a delta entityset for our colections, the issue comes when we have deleted entities, as far as we have noticed, Delta has a way to manage deleted sets fetching only the ID of such entries and expand lacks a way to do so since we can only have one exporting table. We don't know if the offline store will recognize our method EXPANDED as an information provider for Deltas or if its possible to set it up to use it. Or if by default Kaspel would only recognize or call Delta Entityset, therefore we would like to validate if it's possible to assign Kaspel to use a defined URI if a deltatoken is provided.

If none of these options is availeable I'd like to verify if there's any real solution in order to use Delta and complex entities for the query.

I'm well aware these questions are a bit more SMP oriented but we want to validate at least to a code level if we can use a work around to fullfil our requirement. If any of you guys would kindly give us a few light on this issue, it would be amazing.

Thank you all in advance.

Best regards.

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