mysql_autocommit

Name

mysql_autocommit - Toggles autocommit mode

Synopsis

#include <mysql.h>

my_bool mysql_autocommit(MYSQL * mysql, my_bool auto_mode);

Description

Toggles autocommit mode on or off for the current database connection. Autocommit mode will be set if mode=1 or unset if mode=0.

Parameters:

	•		mysql is a connection identifier, which was previously allocated by mysql_init(3) and connected by mysql_real_connect(3).
	•		auto_mode - whether to turn autocommit on or not.

Notes

	•		Autocommit mode only affects operations on transactional table types. To determine the current state of autocommit mode use the SQL command SELECT @@autocommit or check the server status (see example below).
	•		Be aware: the [mysql_rollback()}(mysql_rollback() function will not work if autocommit mode is switched on.

Examples

SQL

# Turn off autocommit
SET AUTOCOMMIT=0;

# Retrieve autocommit
SELECT @@autocommit;
+--------------+
| @@autocommit |
+--------------+
| 0 |
+--------------+

MariaDB Connector/C

static int test_autocommit(MYSQL *mysql)
{
int rc;
unsigned int server_status;

/* Turn autocommit off */
rc= mysql_autocommit(mysql, 0);
if (rc)
return rc; /* Error */

/* If autocommit = 0 succeeded, the last OK packet updated the server status */
rc= mariadb_get_infov(mysql, MARIADB_CONNECTION_SERVER_STATUS, &server_status);
if (rc)
return rc; /* Error */

if (server_status & SERVER_STATUS_AUTOCOMMIT)
{
printf("Error: autocommit is on\n");
return 1;
}
printf("OK: autocommit is off\n");
return 0;
}