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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 data types
Extend the data type system
Optimizer informationThe UPDATE STATISTICS statement collects statistical distribution information for columns of built-in data types. The query execution optimizer uses this information to estimate the costs associated with possible execution paths for a query or for other DML operations.

Optimizer information

The UPDATE STATISTICS statement collects statistical distribution information for columns of built-in data types. The query execution optimizer uses this information to estimate the costs associated with possible execution paths for a query or for other DML operations.

For the database server to collect distribution statistics on columns of opaque or distinct UDTs that you define, you must provide the functions that collect the information. For more information about these functions, see Improve UDR performance.