To create an application catalog, you must compile the database schema and stored procedure class files into a single catalog file. To run the compiler, use the voltdb compile command, specifying three arguments:

For example, if your stored procedure classes are in a subfolder called obj, the command might be:

$ voltdb compile --classpath="obj" -o flight.jar flightschema.sql

If you do not specify an output file, the catalog is created as catalog.jar in the current working directory. The schema can include any data definition language (DDL) statements listed in the Using VoltDB manual appendix on "Supported DDL" that create or partition database objects. A compiled schema cannot contain any DDL statements for modifying the schema; that is, the schema cannot include any ALTER or DROP statements.