Covering functionality of database applications by generating special data

Software processing huge volumes of data is the one of the most used kind of software. In particular it is an important part of enterprise integration called data integration. There are tools supporting development and execution of applications implementing extract, transformation and load pattern. In regard of functional testing of such applications there is a specific is a number of combinations of input data. There are tools supporting test data generation for database application on the basis on schemes of databases or SQL queries of application under tests. Using their one can ensure the functionality covering only by means of a brute force of all available combinations. We propose a method reducing excessiveness of data generation. By means of the method the functionality coverage is achieved with fewer amounts of test data that is close to optimal (one set of test data for one functionality branch).