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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_get_row_desc() functionThe mi_get_row_desc() function obtains a pointer to the row descriptor for the specified row.

The mi_get_row_desc() function

The mi_get_row_desc() function obtains a pointer to the row descriptor for the specified row.

Syntax

MI_ROW_DESC *mi_get_row_desc(row)
   MI_ROW *row;

row: A pointer to the row for which to obtain a descriptor.


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

Usage

The mi_get_row_desc() function returns a row descriptor for the row structure that row references. This function is useful for processing returned row data, especially when not all the rows that a query returns have the same size and structure.

The row descriptor that mi_get_row_desc() returns is valid while the row it came from is valid. For information about row validity, see the description of the mi_next_row() function.

Return values

An MI_ROW_DESC pointer: A pointer to the row descriptor for the row.
NULL: The function was not successful.

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