The emergence of NoSQL databases has opened the question of their coexistence with relational database management systems. After initial misunderstandings about the way new paradigm should be understand, it became evident that in the upcoming years, these two approaches (relational and NoSQL systems) will be used in parallel. in recent years, question whether is it possible to make the mechanism of their integration, in which any solution will retain its specifity became actualized. Different approaches were applied in attempt to give answer to the mentioned question. One of them is the introduction of the virtualization layer. This approach has been taken from reference works (tested on MySQL and MongoDB). This paper analyzes the possibility of expanding the set of database management systems that could be used as a data source for integration between relational and NoSQL systems, on the example of Oracle. Beside testing integration possibilities, impact on performance, after applying virtualization layer, was tested and analized.
