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