1. A system for supporting a transactional system in a heterogeneous computing environment, comprising: one or more microprocessors; one or more record buffers in the transactional system, wherein said one or more record buffers operate to represent one or more data structures in a mainframe computing environment in the heterogeneous computing environment; and a transactional adaptor running on the one or more microprocessors, wherein said transactional adaptor operates to convert one or more data elements between said one or more data structures in the mainframe computing environment and said one or more record buffers in the transactional system.