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 query the SYS.TENANT_VIRTUAL_GLOBAL_VARIABLE view (in Oracle-compatible mode) or the information_schema.GLOBAL_VARIABLES view (in MySQL-compatible 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 query the SYS.TENANT_VIRTUAL_SESSION_VARIABLE view (in Oracle-compatible mode) or the information_schema.SESSION_VARIABLES view (in MySQL-compatible mode) to query the value of a session variable.

• Modify variables

  • Global level

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

    • MySQL-compatible 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.

  • Session level

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

Attributes

Examples

Set the time zone used by the current tenant session to +08:00.

• Session level

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

• Global level

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