The command tag of "ALTER MATERIALIZED VIEW RENAME COLUMN"

Hi,

The command tag of ALTER MATERIALIZED VIEW is basically
"ALTER MATERIALIZED VIEW". For example,

=# ALTER MATERIALIZED VIEW test ALTER COLUMN j SET STATISTICS 100;
ALTER MATERIALIZED VIEW
=# ALTER MATERIALIZED VIEW test OWNER TO CURRENT_USER;
ALTER MATERIALIZED VIEW
=# ALTER MATERIALIZED VIEW test RENAME TO hoge;
ALTER MATERIALIZED VIEW

This is ok and looks intuitive to users. But I found that the command tag of
ALTER MATERIALIZED VIEW RENAME COLUMN is "ALTER TABLE", not "ALTER VIEW".

=# ALTER MATERIALIZED VIEW hoge RENAME COLUMN j TO x;
ALTER TABLE

Is this intentional? Or bug?

Regards,

--
Fujii Masao