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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
Perform bulk copies
Import and export support functions
Import support function

Import support function

The import support function takes as an argument the structure that holds the bulk-copy format of the external representation of the user-defined type and returns the internal structure for the user-defined type.

Any files that the import function reads must reside on the database server computer. If you do not provide an import support function, the database server uses the input support function to import text data.

For C language support, the following function signature is for an import support function of an opaque data type whose internal structure is ll_longlong_t:

ll_longlong_t * ll_longlong_import(mi_impexp
*extrnl_bcopy_format);

The ll_longlong_import() function is a cast function from the IMPEXP data type to the ll_longlong_t data structure. It must be registered as an implicit cast function with the CREATE IMPLICIT CAST statement. For more information about cast functions, see Create casts for opaque data types.