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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® Developers Kit User's GuideThe HCL OneDB™ DataBlade® Developers Kit Users Guide describes how to use OneDB® DataBlade® Developers Kit (DBDK) tools to develop and package DataBlade® modules.
Debugging and testing DataBlade® modules on UNIX™This section describes how to debug and perform functional tests for DataBlade® modules written in C for HCL OneDB™ on UNIX™.
The shared object fileA DataBlade® module exists in the HCL OneDB™ database server as a shared object. The shared object file is loaded into the database server the first time one of its routines is executed after the database server is started. The shared object file is unloaded every time the database server is stopped.
Shared object file ownership and permissionsShared object files must be owned by the user ID that runs the HCL OneDB™ database server.

Shared object file ownership and permissions

Shared object files must be owned by the user ID that runs the HCL OneDB™ database server.

In a production installation, the HCL OneDB database server runs as user informix, and shared object files are owned by user informix.

The HCL OneDB database server loads a shared object file only if it is marked as read-only. The project.bld file is marked as read-only by the makefile BladeSmith generates.

Important: If you receive a -9793 error when you try to execute a routine in the shared object file, your shared object file is not marked as read-only.