1. A computer implemented method comprising: receiving a resource or processing request, at an application server including a processor, from a client application running on an in-memory database platform that includes the application server and an in-memory database system, the in-memory database platform being external to and connectable to a Hadoop cluster via a connection function library in the application server; determining, by the application server, whether the requested resource or processing is available in the in-memory database system; when the requested resource or processing is available in the in-memory database system, sending the resource or processing request to the in-memory database system; and when the requested resource or processing is unavailable in the in-memory database system, generating a Hadoop connection function call from the connection function library based on the resource or processing request, and forwarding the Hadoop connection function call to a function call conversion service of the Hadoop cluster, wherein the function call conversion service of the Hadoop cluster is configured to identify which of a plurality of Hadoop interface services correspond to the Hadoop connection function call, generate a Hadoop interface service function call corresponding to the Hadoop connection function call based one or more parameters included in the Hadoop connection function call, and forward the Hadoop interface service function call to the identified Hadoop interface service to initiate processing by a Hadoop cluster.