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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™.
Create an opaque data type
Creating an opaque data type
Create SQL-invoked functions
Arithmetic and text operator functions for opaque data types

Arithmetic and text operator functions for opaque data types

The database server provides operator functions for arithmetic operators (see Arithmetic operators) and text operators (see Text operators). The operator functions that the database server provides handle the built-in data types. You can overload an operator function to provide the associated operation on your new opaque data type.

If you overload an operator function, make sure you follow these rules:

The name of the operator function must match the name of one of the functions that the database server provides. The name is not case sensitive; the plus() function is the same as the Plus() function.
The operator function must handle the correct number of parameters.
The operator function must return the correct data type, where appropriate.