Home
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
I/O considerations

I/O considerations

The database server stores UDRs and triggers in the following system catalog tables:

sysprocbody
sysprocedures
sysprocplan
sysprocauth
systrigbody
systriggers

These system catalog tables can grow large with heavy use of UDRs in a database. You can tune the key system catalog tables as you would any heavily utilized data tables. To improve performance, use the following methods:

Isolate system catalog tables.
Balance the I/O activities.