<para>
Each function performs the visibility check for one type of database
object. Note that <function>pg_table_is_visible</function> can also be used
- with views, indexes and sequences; <function>pg_type_is_visible</function>
- can also be used with domains. For functions and operators, an object in
+ with views, materialized views, indexes, sequences and foreign tables;
+ <function>pg_type_is_visible</function> can also be used with domains.
+ For functions and operators, an object in
the search path is visible if there is no object of the same name
<emphasis>and argument data type(s)</> earlier in the path. For operator
classes, both name and associated index access method are considered.