explicit_defaults_for_timestamp

Description

explicit_defaults_for_timestamp specifies whether to enable non-standard behavior for the timestamp data type when handling default values and NULL values.

Privilege requirements

• Query variables

  • Global level

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

  • Session level

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

• Modify variables

  • Global level

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

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

  • Session level

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

Attributes

Examples

Enable non-standard behavior for the timestamp data type when handling default values and NULL values.

• Global level

  obclient> SET GLOBAL explicit_defaults_for_timestamp =ON;
  

• Session level

  obclient> SET explicit_defaults_for_timestamp =ON;