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)