PROMOTE AGGREGATOR … TO MASTER

Syntax

PROMOTE AGGREGATOR '<host>':<port> TO MASTER;

Arguments

• <host> is the host of the child aggregator to be promoted.

• <port> is the port of the child aggregator to be promoted.

Remarks

• The node to be promoted must already be a child aggregator in the cluster and must currently be online.

• This command is not supported when the consensus_enabled variable is on. Once high availability for the master aggregator (HA for MA) is enabled this command cannot be used.

• enable_query_forwarding must be set to ON for DDL and DML queries to continue to run while PROMOTE AGGREGATOR executes. See Sync Variables Lists for more information on this variable.

• If there is permanent loss of the master aggregator, use AGGREGATOR SET AS MASTER instead of PROMOTE AGGREGATOR ... TO MASTER.

• This command can be run on a master or child aggregator node (see Node Requirements for SingleStore Commands).

• This command causes implicit commits. Refer to COMMIT for more information.

• Refer to the Permission Matrix for the required permission.

Permissions

The specified user account must have full permissions on the node to execute this command, namely the cluster privilege. For more information, see Permissions Matrix.

Example

PROMOTE AGGREGATOR '127.0.0.1':3307 TO MASTER;

Query OK, 0 rows affected (2.971 sec)

Related Topics

• Aggregator

• AGGREGATOR SET AS MASTER