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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™.
Run a user-defined routine
Understanding routine resolution
The routine signature

The routine signature

The routine signature uniquely identifies the routine. The query parser uses the routine signature when you invoke a UDR. The routine signature includes the following information:

The type of routine: procedure or function
The routine name
The number of parameters
The data types of the parameters
The order of the parameters
The owner name

Important: The signature of a routine does not include return types. Consequently, you cannot create two user-defined functions that have the same signature but different return types.