character_set_server

Description

character_set_server specifies the server character set.

Privilege requirements

• Query variables

  • Global level

    The sys tenant 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 view the values of global system variables.

  • Session level

    The sys tenant 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 view the values of session system variables.

• Modify variables

  • Global level

    • The sys tenant can directly modify the value of a global system variable.

    • A MySQL user tenant must have the SUPER or ALTER SYSTEM privilege to modify the value of a global system variable.

    • An Oracle user tenant must have the ALTER SYSTEM privilege to modify the value of a global system variable.

  • Session level

    The sys tenant and all user tenants can directly modify the value of a session system variable.

Attributes

Examples

Set the server character set to utf8mb4.

• Global level

  obclient> SET GLOBAL  ='utf8mb4';
  

• Session level

  obclient> SET  ='utf8mb4';