character_set_database

Description

character_set_database specifies the default character set of the database.

Privilege requirements

• Query variables

  • Global level

    sys tenants and all user tenants can execute the SHOW VARIABLES statement or query the SYS.TENANT_VIRTUAL_GLOBAL_VARIABLE view (Oracle mode) or the information_schema.GLOBAL_VARIABLES view (MySQL mode) to obtain the values of Global system variables.

  • Session level

    sys tenants and all user tenants can execute the SHOW VARIABLES statement or query the SYS.TENANT_VIRTUAL_SESSION_VARIABLE view (Oracle mode) or the information_schema.SESSION_VARIABLES view (MySQL mode) to obtain the values of Session system variables.

• Modify variables

  • Global level

    • sys tenants can directly modify the values of Global system variables.

    • MySQL user tenants must have the SUPER or ALTER SYSTEM privilege to modify the values of Global system variables.

    • Oracle user tenants must have the ALTER SYSTEM privilege to modify the values of Global system variables.

  • Session level

    sys tenants and all user tenants can directly modify the values of Session system variables of their own tenants.

Attributes

Examples

Set the default character set of the database to utf8mb4.

• Global level

  obclient> SET GLOBAL character_set_database ='utf8mb4';
  

• Session level

  obclient> SET character_set_database ='utf8mb4';