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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.
User-Defined Routines and Data Types Developer's GuideThe HCL OneDB™ User-Defined Routines and Data Types Developer's Guide describes how to define new data types and enable user-defined routines (UDRs) to extend HCL OneDB™.
Improve UDR performance
A virtual-processor class
Choose a virtual-processor class

Choose a virtual-processor class

The database server supports the following classes of virtual processors for the execution of a UDR.


Virtual-processor class	Description
CPU VP	Required VP for execution of SPL routines Default VP for execution of C UDRs. A UDR must be well behaved to run in the CPU VP.
User-defined VP	VP for execution of C UDR that has some ill-behaved characteristics but does not contain system() functions. For information about system() functions, see Operating system functions.
JVP	VP for execution of Java™ UDRThis VP class contains the Java Virtual Machine (Java VM).

The database server defines the CPU VP and the JVP classes.

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