The mi_get_connection_option() function
The mi_get_connection_option() function returns information about the database of the current connection.
Syntax
mi_integer mi_get_connection_option(conn, conn_option, result_ptr)
MI_CONNECTION *conn;
const mi_integer conn_option;
mi_integer *result_ptr;- conn
- A pointer to a connection descriptor established by a previous call to mi_open(), mi_server_connect(), or mi_server_reconnect().
- conn_option
- An integer constant to indicate which connection attribute to obtain. For a list of valid constants, see the following Usage section.
- result_ptr
- A pointer to the connection information that mi_get_connection_option() obtains.
| Valid in client LIBMI application? | Valid in user-defined routine? |
|---|---|
| Yes | Yes |
Usage
The mi_get_connection_option() function puts information about the connection attribute that conn specifies in the location that result_ptr references.
The following
table lists the valid values for conn_option and the associated
possible values that result_ptr references.
| Description | Connection-option constant | Result |
|---|---|---|
| Is the open database an ANSI-compliant database? | MI_IS_ANSI_DB | MI_TRUE or MI_FALSE |
| Does the open database use a transaction log? | MI_IS_LOGGED_DB | MI_TRUE or MI_FALSE |
| Is the database in exclusive mode? (Has the DATABASE statement included the EXCLUSIVE keyword?) |
MI_IS_EXCLUSIVE_DB | MI_TRUE or MI_FALSE |
This function copies this value into the buffer that result_ptr references. The function allocates memory for the result in the current memory duration. When you no longer need this result, free this memory.
Return values
- MI_OK
- The function was successful.
- MI_ERROR
- The function was not successful or the conn_option argument is unknown.
The mi_get_connection_option() function
raises an exception for the following conditions:
- Parameter problems, such as bad or misaligned result pointer
- An invalid connection