Database parameters
To indicate which database it needs to connect to, the client LIBMI application uses database parameters. The DataBlade API provides a database-information descriptor, MI_DATABASE_INFO, to access database parameters. This data type structure identifies the database for a particular session.
Unlike most DataBlade
API structures,
the database-information descriptor is not an opaque C data structure.
To access database information, you must allocate a database-information
descriptor and directly access its fields. The following table shows
the fields in the database-information descriptor.
| Field | Data type | Description |
|---|---|---|
| database_name | char * | The name of the database |
| user_name | char * | The user account name, as defined by the operating system |
| password | char * | The account password, as defined by the operating system |
The milib.h header file defines the MI_DATABASE_INFO structure.
With the database-information descriptor, you can use
the following DataBlade
API functions
to perform the database-parameter tasks.
| Database-parameter task | DataBlade API function |
|---|---|
| Access the default database parameters to determine the database and user for the connection | mi_set_default_database_info(), mi_get_default_database_info() |
| Obtain current database parameters for an open connection | mi_get_database_info() |