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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_type_qualifier() functionThe mi_type_qualifier() function obtains the qualifier of a data type from its type descriptor.

The mi_type_qualifier() function

The mi_type_qualifier() function obtains the qualifier of a data type from its type descriptor.

Syntax

mi_integer mi_type_qualifier(type_desc)
   MI_TYPE_DESC *type_desc;

type_desc: A pointer to the type descriptor from which to obtain the qualifier.


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

Usage

The mi_type_qualifier() function obtains the data type qualifier from the type descriptor that type_desc references. The qualifier is the number of time increments to store for a date and/or time data type: DATETIME and INTERVAL. If you call mi_type_qualifier() on some other data type, the function returns -1.

This function returns an encoded integer value that the database server uses internally to represent a qualifier. You can use the qualifier constants and macros (such as TU_START and TU_END) to use this encoded value.

For information about type-descriptor accessor functions or about qualifiers, see the HCL OneDB™ DataBlade® API Programmer's Guide.

Return values

>=0: The encoded integer qualifier of the data type in type_desc.
MI_ERROR: The function was not successful.