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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™.
Improve UDR performance
Parallel UDRs
Executing UDRs in parallel
Execution of a comparison UDR for sort

Execution of a comparison UDR for sort

When you create opaque data types, you create the support function compare() to sort the UDT data during ORDER BY, UNIQUE, DISTINCT, and UNION clauses and CREATE INDEX operations.

SELECT udtcol FROM t ORDER BY 1;

If the udtcol column has a comparison UDR that is parallelizable and the client enables parallel sort, each sort thread participating in the parallel sort for the order by clause executes the comparison UDR in parallel.