The default database is a relational database that is accessed when an SQL-related I/O statement runs in EGL-generated code and when no other database connection is current. The default database is available from the beginning of a run unit; however, you can dynamically connect to a different database for subsequent access in the same run unit, as described in VGLib.connectionService.
The default database is specified in the optional runtime property vgj.jdbc.default.database, which receives a generated value from build descriptor option sqlDB if option genProperties is set to GLOBAL or PROGRAM at generation time.
Related concepts
Java runtime properties
Run unit
SQL support
Related tasks
Setting up a J2EE JDBC connection
Setting up the J2EE runtime environment for EGL-generated code
Understanding how a standard JDBC connection is made
Related reference
Java runtime properties (details)
sqlDB
connectionService()