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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™.
Write support functions
Operating system functions

Operating system functions

You can use the mi_system() function from within a DataBlade® module or C UDR to execute operating system commands, external user executables, or shell scripts. The mi_system() function creates a child process to execute the command, waits for its completion, and then returns the command's exit status to the calling routine. The child process inherits the user and group IDs of the client running the session. The mi_system() function does not perform any validation on the command you run; therefore, you must run appropriate and accurate commands.

See the HCL OneDB™ DataBlade API Programmer's Guide and HCL OneDB DataBlade API Function Referencefor more details on these functions.