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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® API Function ReferenceThe HCL OneDB™ DataBlade® API Function Reference describes the DataBlade® API functions and the subset of functions that the DataBlade® API supports.
Function descriptionsThis section gives comprehensive reference information about the functions that are valid within DataBlade® API modules. It lists the function descriptions in alphabetical order, with syntax, usage information, and return values for the functions.
The mi_typename_to_typedesc() functionThe mi_typename_to_typedesc() function creates a type descriptor for a data type, given the type name in LVARCHAR format.

The mi_typename_to_typedesc() function

The mi_typename_to_typedesc() function creates a type descriptor for a data type, given the type name in LVARCHAR format.

Syntax

MI_TYPE_DESC *mi_typename_to_typedesc(conn, type_lvname)
   MI_CONNECTION *conn;
   mi_lvarchar *type_lvname;

conn: A pointer to a connection descriptor established by a previous call to mi_open(), mi_server_connect(), or mi_server_reconnect().
type_lvname: The name of the SQL data type, in LVARCHAR format.


Valid in client LIBMI application?	Valid in user-defined routine?
Yes	Yes

Usage

The mi_typename_to_typedesc() function converts the name of the data type in the varying-length structure that type_lvname references into a type descriptor. For a list of SQL data type names, see the HCL OneDB™ DataBlade® API Programmer's Guide.

Return values

An MI_TYPE_DESC pointer: A pointer to the type descriptor for the type_lvname data type.
NULL: The function was not successful; the type_lvname data type was not found.