ALTER NODE

Function

Modifies the definition of an existing node.

Precautions

ALTER NODE is an API of the cluster management tool and is used to manage clusters. Only administrators have the permission to use this API. You are advised not to use this API, because doing so affects the cluster.

Syntax

    
     
       
       
         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 ]]
  );

        

      

    
   

The port whose number is specified by PORT is used for internal communications between nodes. Unlike the port connecting to an external client, it can be queried in the pgxc_node table.