PGXC_CLASS

PGXC_CLASS records replicated or distributed information for each table.

**Table 1** PGXC_CLASS columns
Name	Type	Description
pcrelid	oid	OID of the table.
pclocatortype	"char"	Locator type. H: Hash G: Range L: List M: Modulo N: Round Robin R: Replication U: MurmurHash
pchashalgorithm	smallint	Distributed tuple using the hash algorithm. 1: default hash algorithm. 2: MURMURHASH algorithm.
pchashbuckets	smallint	Value of a harsh container.
pgroup	name	Name of a node cluster.
redistributed	"char"	Indicates that a table has been redistributed.
redis_order	integer	Redistribution sequence. Tables whose values are 0 will not be redistributed in this round of redistribution.
pcattnum	int2vector	Column number used as a distributed key.
nodeoids	oidvector_extend	List of distributed table node OIDs.
options	text	Extension status information. This is a reserved column in the system.
diskey	text	Character string of the distribution key expression in the brackets of the DISTRIBUTE BY clause in the SQL table creation statement. Currently, only MURMURHASH distribution is supported.
diskeyexprs	pg_node_tree	Character string information obtained by serializing diskey by using the pack_node_to_string() function.