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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
User-defined virtual-processor class (C)

User-defined virtual-processor class (C)

For routines written in C, you can designate a user-defined class of virtual processors, called user-defined VPs, to run the routine.

Use of user-defined VPs can result in lower performance because queries normally execute in the CPU VP, and the query thread must migrate to the user-defined VP to evaluate external routines.

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