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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™.
Create Java™ user-defined routinesA user-defined routine (UDR) is a routine that an SQL statement or another UDR can invoke. UDRs written in Java™ code use the server-side implementation of the HCL OneDB™ JDBC Driver to communicate with the database server.
Packages for Java™ user-defined routinesVarious packages can be used to create Java™ user-defined routines (UDRs).
The com.informix.udr.UDRLog

The com.informix.udr.UDRLog

Note: UDRLog is deprecated. It is recommended you use the SLF4J API to log messages for your application. See Traceable Events for more information.

The UDRLog interface provides a simple logging facility for a UDR. The UDRLog interface is defined as follows:

public interface UDRLog
{
   void log(String msg);
}

The interface defines a single method, log(), which takes a String argument and appends it to the JVP log file, which the JVPLOGFILE configuration parameter specifies.