An online transactional data processing (OLTP) system is provided that includes a relational database for storing transactional data, an OLTP application program for processing the transactional data, and a change log for storing a set of change documents that describe transformations performed on the transactional data by the OLTP application program. To correct a run of the OLTP application program, the set of change documents is used to re-establish the original state. A re-run of the OLTP application program may produce a new set of change documents in the random access memory (RAM) of the OLTP system. Further, the original set of change documents stored in the change log may be at least partly overwritten by the new set of change documents.