PGXC_CLASS

PGXC_CLASS records the replicated or distributed information for each table. The PGXC_CLASS system catalog has specific meanings only in distributed scenarios. openGauss can only query the table definition.

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

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.

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    openGauss 2024-04-21 00:47:23
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