ALTER TABLE testschema."table_3_$%{}[]()&*^!@""'`\/#"
    ADD COLUMN "col_8_$%{}[]()&*^!@""'`\/#" bigint(None, None) GENERATED ALWAYS AS (dummy1 + dummy2) STORED;

COMMENT ON COLUMN testschema."table_3_$%{}[]()&*^!@""'`\/#"."col_8_$%{}[]()&*^!@""'`\/#"
    IS 'Comment for create';