[Tables] Merge operation fails with a Cosmos endpoint

[seankane-msft]

The Merge operation (which is implemented as Patch) always fails with a 405 MethodNotAllowed response against Cosmos table endpoints. Inspecting the traffic sent by the track 1 client reveals that they send Merge as Post with an additional header: X-HTTP-Method: MERGE . Adding this header and changing the method to Post results in a successful merge in my testing.

Ideally the Cosmos Table endpoint would accept the same http request shape as Storage.

#cosmosKnownIssue

.NET Issue

Thanks for the feedback! We are routing this to the appropriate team for follow-up. cc @wmengmsft, @MehaKaushik, @shurd, @anfeldma-ms