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 tenants and all user tenants can execute the SHOW VARIABLES statement or query the information_schema.GLOBAL_VARIABLES view (MySQL mode) to view the values of global system variables.

  • Session level

    sys tenants and all user tenants can execute the SHOW VARIABLES statement or query the information_schema.SESSION_VARIABLES view (MySQL mode) to view 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.

  • Session level

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

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;