time_zone

Description

The time_zone variable specifies the time zone for the current session of a tenant. Valid values are in the '+08:00' offset format or the Asia/Shanghai region format.

Privilege requirements

• Query variables

  • Global level

The sys tenant and all user tenants can execute the SHOW VARIABLES statement or view the SYS.TENANT_VIRTUAL_GLOBAL_VARIABLE view (in Oracle mode) or the information_schema.GLOBAL_VARIABLES view (in MySQL mode) to query the value of a global system variable.

* Session level

The sys tenant and all user tenants can execute the SHOW VARIABLES statement or view the SYS.TENANT_VIRTUAL_SESSION_VARIABLE view (in Oracle mode) or the information_schema.SESSION_VARIABLES view (in MySQL mode) to query the value of a session system variable.

• Modify variables

  • Set the variable at the global level

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

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

• For V4.x, starting from V4.2.0, Oracle user tenants must have the ALTER SYSTEM privilege to modify the value of a global system variable.

  • Set the variable at the session level

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

Attributes

| Modifiable | Yes. You can use the SET statement to modify the value.|

Examples

• Set the variable at the session level

  obclient> SET time_zone='+08:00';
  

• Set the variable at the global level

  obclient> SET GLOBAL time_zone='+08:00';