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 data types
Understanding data types
Extended data types
User-defined data types

User-defined data types

The following table summarizes the UDTs that the database server supports.

Table 1. User-defined data types
Data type	Explanation
Distinct	Has the same internal representation as the source data type on which it is based but has different casts and functions defined over it than those on the source type
Opaque	Fundamental data type that the user defines A fundamental data type is atomic; that is, it cannot be broken into smaller pieces, and it can serve as the building block for other data types.

In an ANSI-compliant database, columns defined using user-defined types should be in the owner.object format.