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mysql_select_db(3) MariaDB Connector/C mysql_select_db(3)

Name

mysql_select_db - selects a database as default

Synopsis

#include <mysql.h>
int mysql_select_db(MYSQL * mysql,

const char * db);

Description

Selects a database as default. Returns zero on success, non-zero on failure

Parameters

mysql is a connection identifier, which was previously allocated by mysql_init(3) and connected by mysql_real_connect(3).
db - the default database name

Notes

To retrieve the name of the default database either execute the SQL command SELECT DATABASE() or retrieve the value via mariadb_get_infov(3) API function.
The default database can also be set by the db parameter in mysql_real_connect(3).

Examples

SQL

# switch to default database test
USE test;
# check default database
SELECT DATABASE();
+------------+
| database() |
+------------+
| test       |
+------------+
    

MariadDB Connector/C

static int set_default_db(MYSQL *mysql)
{

int rc;
char *default_db;
/* change default database to test */
rc= mysql_select_db(mysql, "test");
if (rc)
return rc; /* Error */
/* get the default database */
rc= mariadb_get_infov(mysql, MARIADB_CONNECTION_SCHEMA, &default_db);
if (rc)
return rc; /* Error */
if (strcmp("test", default_db) != NULL)
{
printf("Wrong default database\n");
return 1;
}
printf("Default database: %s", default_db);
return 0; }

See also

mysql_real_connect(3)

Version 3.2.2