PGXC_GROUP

PGXC_GROUP records information about node groups. The PGXC_GROUP system catalog has specific meanings only in distributed scenarios. Centralized systems can query only the table definition.

**Table 1** PGXC_GROUP columns
Name	Type	Description
oid	oid	Row identifier (hidden attribute, which must be specified)
group_name	name	Node group name
in_redistribution	"char"	Whether redistribution is required. The value must be one of the following: n: The node group is not redistributed. y: The source node group is in redistribution. t: The destination node group is in redistribution.
group_members	oidvector_extend	Node OID list of the node group
group_buckets	text	Distributed data bucket group
is_installation	boolean	Specifies whether to install a sub-database instance. t (true): yes f (false): no
group_acl	aclitem[]	Access permission
group_kind	"char"	Node group type. The value must be one of the following: i: installation node group n: node group in a common non-logical database instance v: node group in a logical database instance e: elastic database instance
group_parent	oid	For a child node group, this field indicates the OID of the parent node group. For a parent node group, this field is left blank.