56.34. `pg_user_mappings`
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## 56.34. `pg_user_mappings` #

The view `pg_user_mappings` provides access to information about user mappings. This is essentially a publicly readable view of `pg_user_mapping` that leaves out the options field if the user has no rights to use it.

Table 56.34. `pg_user_mappings` Columns

Column Type Description
`umid` `oid` (references `pg_user_mapping`.`oid`) OID of the user mapping
`srvid` `oid` (references `pg_foreign_server`.`oid`) The OID of the foreign server that contains this mapping
`srvname` `name` (references `pg_foreign_server`.`srvname`) Name of the foreign server
`umuser` `oid` (references `pg_authid`.`oid`) OID of the local role being mapped, or zero if the user mapping is public
`usename` `name` Name of the local user to be mapped
`umoptions` `text[]` User mapping specific options, as “keyword=value” strings

To protect password information stored as a user mapping option, the `umoptions` column will read as null unless one of the following applies:

- current user is the user being mapped, and owns the server or holds `USAGE` privilege on it

- current user is the server owner and mapping is for `PUBLIC`

- current user is a superuser

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