PGXC_GROUP

PGXC_GROUP records information about node groups. The PGXC_GROUP system catalog has specific meanings only in distributed scenarios. openGauss can only query 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	Whether to install a sub-cluster 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 cluster v: node group in a logical cluster e: elastic cluster
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.