The catalog pg_description stores optional descriptions
(comments) for each database object. Descriptions can be manipulated
with the COMMENT command and viewed with
psql's \d commands.
Descriptions of many built-in system objects are provided in the initial
contents of pg_description.
See also pg_shdescription,
which performs a similar function for descriptions involving objects that
are shared across a database cluster.
Table 43-17. pg_description Columns
| Name | Type | References | Description |
|---|
| objoid | oid | any OID column | The OID of the object this description pertains to |
| classoid | oid | pg_class.oid | The OID of the system catalog this object appears in |
| objsubid | int4 | | For a comment on a table column, this is the column number (the
objoid and classoid refer to
the table itself). For all other object types, this column is
zero
|
| description | text | | Arbitrary text that serves as the description of this object |