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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
Improve performance of C user-defined routines

Improve performance of C user-defined routines

On UNIX™, Linux™, and MacOS operating systems you can improve the performance of C-language UDRs (C UDRs) by loading the shared libraries for the C UDRs when the database server is started. Otherwise, the C UDR shared libraries are loaded when the UDRs are first used. To preload a C UDR shared library, set the PRELOAD_DLL_FILE configuration parameter to the library path and file name. You must specify a separate PRELOAD_DLL_FILE configuration parameter for each library that you want to preload.

For more information about the PRELOAD_DLL_FILE configuration parameter, see the HCL OneDB™ Administrator's Reference