Appending SELECT privilege not applied on show columns and show index

create database db;

create user foo@localhost;

grant create on db.* to foo@localhost;

--connect (con1,localhost,foo,,db)

create table t (a int, key(a));

show create table t;

--error ER_TABLEACCESS_DENIED_ERROR

show columns in t;

--error ER_TABLEACCESS_DENIED_ERROR

show index in t;

# Give the user select privilege

--connection default

grant select on db.* to foo@localhost;

--connection con1

show grants for current_user;

Grants for foo@localhost

GRANT USAGE ON *.* TO `foo`@`localhost`

GRANT SELECT, CREATE ON `db`.* TO `foo`@`localhost`

# This should be visible but is not - bug! still ER_TABLEACCESS_DENIED_ERROR

show columns in t;

8: query 'show columns in t' failed: ER_TABLEACCESS_DENIED_ERROR (1142): SELECT command denied to user 'foo'@'localhost' for table 't'

# This should be visible but is not - bug! still ER_TABLEACCESS_DENIED_ERROR

show index in t;

# Cleanup

--disconnect con1

--connection default

drop database db;

drop user foo@localhost;

--connection default

create user bar@localhost;

grant select on db.* to bar@localhost;

show grants for bar@localhost;

Grants for bar@localhost

GRANT USAGE ON *.* TO `bar`@`localhost`

GRANT SELECT ON `db`.* TO `bar`@`localhost`

--connect (con2,localhost,bar,,db)

show index in t;

Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	CardinalitySub_part	Packed	Null	Index_type	Comment	Index_comment	Ignored

t	1	a	1	a	A	NULL	NULL	NULL	YES	BTREE			NO

show columns in t;

Field	Type	Null	Key	Default	Extra

a	int(11)	YES	MUL	NULL