47.74. pg_user_mappings

This catalog exists in each coordinator and datanode in Postgres-XC as inherited from PostgreSQL. Please note that current release of Postgres-XC does not support foreign data wrapper.

Note: The following description applies both to Postgres-XC and PostgreSQL if not described explicitly.

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 47-75. pg_user_mappings Columns

NameTypeReferencesDescription
umidoidpg_user_mapping.oidOID of the user mapping
srvidoidpg_foreign_server.oid The OID of the foreign server that contains this mapping
srvnamenamepg_foreign_server.srvname Name of the foreign server
umuseroidpg_authid.oidOID of the local role being mapped, 0 if the user mapping is public
usenamename Name of the local user to be mapped
umoptionstext[]  User mapping specific options, as "keyword=value" strings, if the current user is the owner of the foreign server, else null