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ALTER NODE nodename WITH
  (
    [ TYPE = nodetype,]
    [ HOST = hostname,]
    [ PORT = portnum,]
    [ HOST1 = 'hostname',]
    [ PORT1 = portnum,]
    [ HOSTPRIMARY [ = boolean ],]
    [ PRIMARY [ = boolean ],]
    [ PREFERRED [ = boolean ],]
    [ SCTP_PORT = portnum,]
    [ CONTROL_PORT = portnum,]
    [ SCTP_PORT1 = portnum,]
    [ CONTROL_PORT1 = portnum, ]
    [ NODEIS_CENTRAL [ = boolean ]]
  );