New in v21.1:
The ALTER DATABASE ... SURVIVE {ZONE,REGION} FAILURE statement sets the survival goal for a multi-region database.
SURVIVE {ZONE,REGION} FAILURE is a subcommand of ALTER DATABASE.
Synopsis
Parameters
| Parameter | Description |
|---|---|
database_name |
The database whose survival goal you are configuring. |
Required privileges
The user must be a member of the admin or owner roles, or have the CREATE privilege on the database.
Examples
Survive zone failures
To change the survival goal of a multi-region database to survive zone failures, use the following statement:
ALTER DATABASE {db} SURVIVE ZONE FAILURE;
ALTER DATABASE SURVIVE
Surviving zone failures is the default setting for multi-region databases.
For more information about the zone survival goal, see Surviving zone failures.
Survive region failures
To change the survival goal of a multi-region database to survive region failures, use the following statement:
ALTER DATABASE {db} SURVIVE REGION FAILURE;
ALTER DATABASE SURVIVE
If you try to change a database with less than 3 database regions to survive region failures, the following error will be signalled:
ERROR: at least 3 regions are required for surviving a region failure
SQLSTATE: 42602
HINT: you must add additional regions to the database using ALTER DATABASE mr ADD REGION <region_name>
For more information about the region survival goal, see Surviving region failures.
See also
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