Extend the database server

This publication discusses extending HCL Informix® by using user-defined routines (UDRs) and user-defined data types (UDTs). You can use UDRs and never use a UDT. Conversely, you can use UDTs and never use UDRs. However, many of the ways that you extend data types require that you write routines to support those extensions.

These topics summarize the organization of the section in this publication and describe which portion of the publication you will need to use, depending on your goals.