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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™.
Extend operators and built-in functions
Operators and operator functions
Arithmetic operators

Arithmetic operators

Arithmetic operators usually operate on numeric values. The following table lists the operator functions for the arithmetic operators that the database server provides.


Arithmetic operator	Operator function
+ (binary)	plus()
- (binary)	minus()
*	times()
+ (unary)	positive()
- (unary)	negate()
/	divide()

You can overload these operators so that you can use them with user-defined types. For an example of overloading the plus() and divide() functions, refer to Example of a user-defined aggregate.