Refactoring as a Technique for Transformation IMS-Queries into SQL-Queries

Refactoring is defined as special techniques for restructuring an existing body of a code and its internal structure without changing its external functionality. In other words one can say that refactoring is recoding of the source code. Refactoring approach can be used for complex transformation of the application programs from PL/1 or COBOL (with invocations to IMS databases) to C or Java with invocations to some modern database like Oracle or MYSQL. Since an enormous lines of PL/1 code are working now (some of them with poor documentation) and are needed to be transformed on modern platforms therefore automated translation should be done (as intensive as possible). Some ideas about decision of such transformation will be done in future.