DROP NODE GROUP DROP NODE GROUP 7 SQL - Language Statements DROP NODE GROUP drop a group of cluster nodes DROP NODE GROUP groupname DROP NODE GROUP is SQL command specific to Postgres-XL that deletes node group information in catalog pgxc_group. A group of nodes works as an alias for node lists when defining tables on sub-clusters. groupname The name of the selected cluster node group. Drop a cluster node group. DROP NODE GROUP cluster_group; DROP NODE GROUP does not conform to the SQL standards, it is a Postgres-XL specific command.