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  5. PG_SHDESCRIPTION

PG_SHDESCRIPTION

PG_SHDESCRIPTION stores optional descriptions (comments) for shared database objects. Descriptions can be manipulated with the COMMENT command and viewed with psql's \d commands.

See also PG_DESCRIPTION, which performs a similar function for descriptions involving objects within a single database.

Unlike most system catalogs, PG_SHDESCRIPTION is shared across all databases of a cluster. There is only one copy of PG_SHDESCRIPTION per cluster, not one per database.

Table 1 PG_SHDESCRIPTION columns

Name

Type

Reference

Description

objoid

oid

Any OID column

OID of the object this description pertains to

classoid

oid

PG_CLASS.oid

OID of the system catalog this object appears in

description

text

-

Arbitrary text that serves as the description of this object