DBMS TRANSACTION TRANSLATION

Abstract

Data translation and transaction translation are two major problems that have to be solved in order to achieve the coexistence of heterogeneous distributed databases. In this paper we discuss the problem of transaction translation. The nature of the problem is explored by developing direct translations of transactions between the relational and hierarchical and network models. Methods for mapping a hierarchical or network schema to an equivalent relational schema are presented. The relational operators projection, selection, join, insertion. deletion and update are translated to equivalent hierarchical and network operations.