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Extending HCL OneDB™Beyond standard relational database objects, HCL OneDB™ can be extended to handle specialized data types, access methods, routines, and other objects. HCL OneDB™ includes many built-in extensions that are fully integrated in the database server. HCL OneDB™ also provides DataBlade® modules, which are packages of extended database objects for a particular purpose and that are installed separately from the database server. Alternatively, you can create your own user-defined objects for HCL OneDB™.
Creating extensionsYou can create user-defined data types, routines, access methods, and other database objects to suit your needs. You can use application programming interfaces to write user-defined routines and applications that access data in HCL OneDB™ databases.
J/Foundation Developer's GuideThe HCL® J/Foundation Developer's Guide describes how to write user-defined routines (UDRs) in the Java™ programming language for HCL OneDB™.
ConceptsThis section introduces the infrastructure for creating and executing user-defined routines (UDRs) and applications that you write in Java™ to run in the HCL OneDB™ database server.
System catalog tablesThe sysroutinelangs, syslangauth, and sysprocedures system catalog tables contain information about the UDRs written in Java™ code.

System catalog tables

The sysroutinelangs, syslangauth, and sysprocedures system catalog tables contain information about the UDRs written in Java™ code.

The sysroutinelangs table lists the programming languages that you can use to write UDRs. The table gives the names of the language initialization functions and the path for the language library.

The syslangauth table specifies who is allowed to use the language. For Java code, the default is the database administrator. For information about how to modify the usage privileges, see the GRANT statement in the HCL OneDB™ Guide to SQL: Syntax.

The sysprocedures table gives information about both built-in routines and routines that you define.

For more information about these system catalog tables, see Find information about user-defined routines and the HCL OneDB Guide to SQL: Reference.

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