PGXC_GROUP

PGXC_GROUP records node group information. In DWS 3.0, each node group in a logical cluster is called a VW. At the storage KV layer, each VW corresponds to a vgroup.

**Table 1** PGXC_GROUP columns
Column	Type	Description
group_name	name	Specifies the name of a node group.
in_redistribution	"char"	Whether redistribution is required. n indicates that the Node Group is not redistributed. y indicates the source Node Group in redistribution. t indicates the destination Node Group in redistribution.
group_members	oidvector_extend	DN node OID list of in a node group
group_buckets	text	Distributed data bucket group
is_installation	boolean	Indicates whether the node group is an installation node group.
group_acl	aclitem[]	Access permissions
group_kind	"char"	Node group type. i indicates the installation node group, which contains all DNs. n indicates a common non-logical cluster node group. v indicates a logical cluster node group. e indicates the elastic cluster node group. r indicates a replication table node group, which can only be used to create replication tables and can contain one or more logical cluster node groups.
group_ckpt_csn	xid	CSN of the last incremental extraction performed on a node group.
vgroup_id	xid	ID of the vgroup corresponding to the node group.
vgroup_bucket_count	oid	Number of buckets in the vgroup corresponding to the node group.
group_ckpt_time	timestamp with time zone	Physical time when the last incremental extraction is performed on a node group.
apply_kv_duration	integer	Duration of incremental scanning in the last incremental extraction of a node group, in seconds.
ckpt_duration	integer	Checkpoint duration in the last incremental extraction of a node group, in seconds.
group_flags	integer	Node group flag. Currently, only the first flag is valid. Other flags are not used in the current version. Flag 1: If the value is 1, the node group is a read-only logical cluster. If the value is 0, the node group is a read-write logical cluster.