2.9 ADG_REDIRECT_DML

Use ADG_REDIRECT_DML to enable or disable automatic redirection of DML operations from a standby to the primary in Oracle Active Data Guard environments.

Property Description

Parameter type

Boolean

Default value

false

Modifiable

ALTER SYSTEM

Can be modified at the session level with a special ALTER SESSION command. See details below.

Modifiable in a PDB

No

Range of values

true | false

Basic

No

Oracle RAC

Different instances can use different values.

Automatic redirection of DML operations to the primary can be configured at the system level or the session level. The session level setting overrides the system level setting.

  • To enable automatic redirection of DML operations to the primary at the system level, set ADG_REDIRECT_DML to true.

  • To disable automatic redirection of DML operations to the primary at the system level, set ADG_REDIRECT_DML to false.

  • To enable automatic redirection of DML operations from a standby to the primary for the current session, issue the following SQL statement:

    ALTER SESSION ENABLE ADG_REDIRECT_DML;

  • To disable automatic redirection of DML operations from a standby to the primary for the current session, issue the following SQL statement:

    ALTER SESSION DISABLE ADG_REDIRECT_DML;

See Also:

Oracle Data Guard Concepts and Administration for more information about automatic redirection of DML operations