Postgres-XC 1.1 Documentation
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# 47.53. `pgxc_node`

> Note: The following description applies only to Postgres-XC

The catalog `pgxc_node` stores information about cluster node information, such as connection information with node port and host, node name, primary and preferred nodes.

Table 47-54. `pgxc_node` Columns

Name | Type | References | Description
--- | --- | --- | ---
`node_name` | `name` |  | Name of cluster node
`node_type` | `char` |  | Type of cluster node. It is `C` for a Coordinator. It is `D` for a Datanode.
`node_port` | `int4` |  | Port number of cluster node
`node_host` | `name` |  | Host name or IP number of cluster node
`nodeis_primary` | `bool` |  | Defines if node is a primary node. Only Datanode can be a primary node.
`nodeis_preferred` | `bool` |  | Defines if node is a preferred node. Only a Datanode can be a preferred node.
`node_id` | `int4` |  | Integer node identifier of node. It is generated when node is created.

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