50.56. pg_user_mapping
 The catalog pg_user_mapping stores the mappings from local user to remote. Access to this catalog is restricted from normal users, use the view pg_user_mappings instead. 
Table 50.57. pg_user_mapping Columns
| Name | Type | References | Description | 
|---|---|---|---|
| oid | oid | Row identifier (hidden attribute; must be explicitly selected) | |
| umuser | oid |  | OID of the local role being mapped, 0 if the user mapping is public | 
| umserver | oid |  | The OID of the foreign server that contains this mapping | 
| umoptions | text[] | User mapping specific options, as “keyword=value” strings |