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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.
DataBlade® Developers KitThe DataBlade® Developers Kit (DBDK) guides contain information about the tools you can use to develop and package DataBlade® modules, which extend the functionality of HCL OneDB™ databases.
DataBlade® Module Development OverviewThese topics serve as an overview of the HCL OneDB™ DataBlade® module development process.The HCL OneDB™ DataBlade® module overview serves as an overview of the HCL OneDB™ DataBlade® module development process.
DataBlade® module concepts
DataBlade® modules and the database serverThis section describes the overall architecture of the HCL OneDB™ database server, how DataBlade® modules affect database server processes, and the application programming interfaces you can use in your DataBlade® modules and client applications.
DataBlade® module programming languages
Java™ languageThe OneDB® DataBlade® Developers Kit (DBDK) enables you to create database objects in Java™.

Java language

The OneDB® DataBlade® Developers Kit (DBDK) enables you to create database objects in Java™.

You can create user-defined routines, cast support functions, aggregates, and opaque data type support routines in Java. You can also create Java value objects to represent opaque data types on a client computer. You cannot create Java routines that take row or collection data types.

The code generated for Java by the DataBlade Developers Kit uses HCL OneDB JDBC Driver methods to communicate with the database server. HCL OneDB JDBC Driver supports the JDBC 2.0 API. You can use the JDBC 2.0 API to create database applications in Java.

For more information about HCL OneDB JDBC Driver, see the HCL OneDB JDBC Driver Programmer's Guide.

For a complete discussion about creating user-defined routines in Java, see the HCL® J/Foundation Developer's Guide.

Important: You must use the J/Foundation option for HCL OneDB to enable services that use Java. For more information about J/Foundation, see the HCL J/Foundation Developer's Guide.