## 52.47. `pg_shdescription`

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 The catalog `pg_shdescription` stores optional descriptions (comments) for shared database objects. Descriptions can be manipulated with the [`COMMENT`](sql-comment.html) command and viewed with psql's `\d` commands.

 See also [`pg_description`](catalog-pg-description.html), 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 52.47. `pg_shdescription` Columns**

|                                                   Column Type<br/><br/> Description                                                  |
|--------------------------------------------------------------------------------------------------------------------------------------|
|               `objoid` `oid` (references any OID column)<br/><br/> The OID of the object this description pertains to                |
|`classoid` `oid` (references [`pg_class`](catalog-pg-class.html).`oid`)<br/><br/> The OID of the system catalog this object appears in|
|                     `description` `text`<br/><br/> Arbitrary text that serves as the description of this object                      |

