Postgres-XC 1.2.1 Documentation
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CREATE NODE GROUP

Name

CREATE NODE GROUP -- create a group of cluster nodes

CREATE NODE GROUP groupname
WITH ( nodename [, ... ] )

Note: XCONLY: The following description applies only to Postgres-XC.

CREATE NODE GROUP is new SQL query specific to Postgres-XC since 0.9.7 that creates node group information in catalog pgxc_group.

CREATE NODE only runs on the local node where it is launched.

A group of nodes works as an alias for node lists when defining tables on sub-clusters. Only Datanode can be included in node groups.

Create a cluster node group made of nodes called Datanode1, Datanode2.

CREATE NODE GROUP cluster_group WITH Datanode1, Datanode2;

CREATE NODE GROUP does not conform to the SQL standards, it is a Postgres-XC specific command.

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