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 47-74. pg_user_mappings Columns
|umid||oid||pg_user_mapping.oid||OID of the user mapping|
|srvid||oid||pg_foreign_server.oid||The OID of the foreign server that contains this mapping|
|srvname||name||pg_foreign_server.srvname||Name of the foreign server|
|umuser||oid||pg_authid.oid||OID of the local role being mapped, 0 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, if the current user is the owner of the foreign server, else null|
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