PGXC_CLASS

PGXC_CLASS records replicated or distributed information for each table. PGXC_CLASS can only be used to query table definitions in centralized mode.

**Table 1** PGXC_CLASS columns
Name	Type	Description
pcrelid	oid	Table OID
pclocatortype	"char"	Locator type H: Hash G: Range L: List M: Modulo N: Round Robin R: Replication
pchashalgorithm	smallint	Distributed tuple using the hash algorithm 1: default hash algorithm. 2: MURMURHASH algorithm.
pchashbuckets	smallint	Value of a hash container
pgroup	name	Name of the node
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	Not supported. Its value is NULL.
diskeyexprs	pg_node_tree	Not supported. Its value is NULL.