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™.
Extend the database server
Extend built-in data types

Extend built-in data types

Built-in data types are provided by the database server. The database server already has functions for retrieving, storing, manipulating, and sorting built-in data types.

You can extend built-in data types in the following ways:

Creating complex data types based on built-in data types
Creating UDTs (distinct and opaque data types)
Extending the operations that are allowed for both built-in data types and extended data types

Extend data types describes the data type system that the database uses and documents how to extend the database server by building UDTs that are based on built-in data types. The HCL OneDB™ Database Design and Implementation Guide also discusses UDTs that are based on built-in data types.