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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
Handle the internal representation
The send and receive support functions
The SENDRECV data type

The SENDRECV data type

The SENDRECV data type holds the external binary representation of an opaque data type when it is transferred between the client computer and the database server computer. The SENDRECV data type allows for any possible change in the size of the data when it is converted between the two representations. The receive and send support functions serve as cast functions between the SENDRECV and opaque data type.

applications do not use the SENDRECV data type. Instead, these applications use fixed binary and var binary host variables in SQL statements to transfer the internal representation of an opaque type on the client computer. The database server implicitly invokes the receive and send support functions when it receives an SQL statement that contains a fixed binary or var binary host variable.