Cursor based select processing

The OpenAccess SDK SQL engine allows a query to be processed in increments so that the results can start coming to the client before the query is completely executed. In this mode, the IP processes n number of rows and then returns control to the OpenAccess SDK SQL engine to allow it to return the data back to the client. The IP is called repeatedly until all data has been processed. This not only make the system feel more responsive, but it also allows operations on large data sets to be completed without requiring large amounts of memory.