SQL/MX 3.2.1 Guide to Stored Procedures in Java (H06.26+, J06.15+)

JDBC/MX-Based Java Method
An SPJ method can be from a class file that uses standard JDBC method calls to access a NonStop
SQL database. The pure Java and native layers of the JDBC/MX driver work together to process
database requests issued by the SPJ method:
The SPJ Environment
NonStop SQL/MX processes CALL statements in an SPJ environment, which is hosted within an
SQL/MX UDR server process. The SPJ environment includes an embedded JVM inside of which
SPJ methods, invoked by CALL statements, execute, as shown in Figure 4.
24 Introduction