mariadb/mysql-test/t/trigger-grant.test

# Test case(s) in this file contain(s) GRANT/REVOKE statements, which are not
# supported in embedded server. So, this test should not be run on embedded
# server.

-- source include/not_embedded.inc

###########################################################################
#
# Tests for WL#2818:
#   - Check that triggers are executed under the authorization of the definer.
#   - Check that if trigger contains NEW/OLD variables, the definer must have
#     SELECT privilege on the subject table.
#   - Check DEFINER clause of CREATE TRIGGER statement;
#     - Check that SUPER privilege required to create a trigger with different
#       definer.
#     - Check that if the user specified as DEFINER does not exist, a warning
#       is emitted.
#     - Check that the definer of a trigger does not exist, the trigger will
#       not be activated.
#   - Check that SHOW TRIGGERS statement provides "Definer" column.
#
#  Let's also check that user name part of definer can contain '@' symbol (to
#  check that triggers are not affected by BUG#13310 "incorrect user parsing
#  by SP").
#
###########################################################################

#
# Prepare environment.
#

DELETE FROM mysql.user WHERE User LIKE 'mysqltest_%';
DELETE FROM mysql.db WHERE User LIKE 'mysqltest_%';
DELETE FROM mysql.tables_priv WHERE User LIKE 'mysqltest_%';
DELETE FROM mysql.columns_priv WHERE User LIKE 'mysqltest_%';
FLUSH PRIVILEGES;

--disable_warnings
DROP DATABASE IF EXISTS mysqltest_db1;
--enable_warnings

CREATE DATABASE mysqltest_db1;

CREATE USER mysqltest_dfn@localhost;
CREATE USER mysqltest_inv@localhost;

GRANT SUPER ON *.* TO mysqltest_dfn@localhost;
GRANT CREATE ON mysqltest_db1.* TO mysqltest_dfn@localhost;

#
# Check that triggers are executed under the authorization of the definer:
#   - create two tables under "definer";
#   - grant all privileges on the test db to "definer";
#   - grant all privileges on the first table to "invoker";
#   - grant only select privilege on the second table to "invoker";
#   - create a trigger, which inserts a row into the second table after
#     inserting into the first table.
#   - insert a row into the first table under "invoker". A row also should be
#     inserted into the second table.
#

--connect (wl2818_definer_con,localhost,mysqltest_dfn,,mysqltest_db1)
--connection wl2818_definer_con
--echo
--echo ---> connection: wl2818_definer_con

CREATE TABLE t1(num_value INT);
CREATE TABLE t2(user_str TEXT);

CREATE TRIGGER trg1 AFTER INSERT ON t1
  FOR EACH ROW
    INSERT INTO t2 VALUES(CURRENT_USER());

--connection default
--echo
--echo ---> connection: default

# Setup definer's privileges.

GRANT ALL PRIVILEGES ON mysqltest_db1.t1 TO mysqltest_dfn@localhost;
GRANT ALL PRIVILEGES ON mysqltest_db1.t2 TO mysqltest_dfn@localhost;

# Setup invoker's privileges.

GRANT ALL PRIVILEGES ON mysqltest_db1.t1
  TO 'mysqltest_inv'@localhost;
  
GRANT SELECT ON mysqltest_db1.t2
  TO 'mysqltest_inv'@localhost;

--connection wl2818_definer_con
--echo
--echo ---> connection: wl2818_definer_con

use mysqltest_db1;

INSERT INTO t1 VALUES(1);

SELECT * FROM t1;
SELECT * FROM t2;

--connect (wl2818_invoker_con,localhost,mysqltest_inv,,mysqltest_db1)
--connection wl2818_invoker_con
--echo
--echo ---> connection: wl2818_invoker_con

use mysqltest_db1;

INSERT INTO t1 VALUES(2);

SELECT * FROM t1;
SELECT * FROM t2;

#
# Check that if definer lost some privilege required to execute (activate) a
# trigger, the trigger will not be activated:
#  - create a trigger on insert into the first table, which will insert a row
#    into the second table;
#  - revoke INSERT privilege on the second table from the definer;
#  - insert a row into the first table;
#  - check that an error has been risen;
#  - check that no row has been inserted into the second table;
#

--connection default
--echo
--echo ---> connection: default

use mysqltest_db1;

REVOKE INSERT ON mysqltest_db1.t2 FROM mysqltest_dfn@localhost;

--connection wl2818_invoker_con
--echo
--echo ---> connection: wl2818_invoker_con

use mysqltest_db1;

--error ER_TABLEACCESS_DENIED_ERROR
INSERT INTO t1 VALUES(3);

SELECT * FROM t1;
SELECT * FROM t2;

#
# Check that if trigger contains NEW/OLD variables, the definer must have
# SELECT/UPDATE privilege on the subject table:
#   - drop the trigger;
#   - create a new trigger, which will use NEW variable;
#   - create another new trigger, which will use OLD variable;
#   - revoke SELECT/UPDATE privilege on the first table from "definer";
#   - insert a row into the first table;
#   - analyze error code;
#

#
# SELECT privilege.
#

--connection default
--echo
--echo ---> connection: default

use mysqltest_db1;

REVOKE SELECT ON mysqltest_db1.t1 FROM mysqltest_dfn@localhost;

--connection wl2818_definer_con
--echo
--echo ---> connection: wl2818_definer_con

use mysqltest_db1;

DROP TRIGGER trg1;

SET @new_sum = 0;
SET @old_sum = 0;

# INSERT INTO statement; BEFORE timing

--echo ---> INSERT INTO statement; BEFORE timing

CREATE TRIGGER trg1 BEFORE INSERT ON t1
  FOR EACH ROW
    SET @new_sum = @new_sum + NEW.num_value;

--error ER_TABLEACCESS_DENIED_ERROR
INSERT INTO t1 VALUES(4);

# INSERT INTO statement; AFTER timing

--echo ---> INSERT INTO statement; AFTER timing

DROP TRIGGER trg1;

CREATE TRIGGER trg1 AFTER INSERT ON t1
  FOR EACH ROW
    SET @new_sum = @new_sum + NEW.num_value;

--error ER_TABLEACCESS_DENIED_ERROR
INSERT INTO t1 VALUES(5);

# UPDATE statement; BEFORE timing

--echo ---> UPDATE statement; BEFORE timing

DROP TRIGGER trg1;

CREATE TRIGGER trg1 BEFORE UPDATE ON t1
  FOR EACH ROW
    SET @old_sum = @old_sum + OLD.num_value;

--error ER_TABLEACCESS_DENIED_ERROR
UPDATE t1 SET num_value = 10;

# UPDATE statement; AFTER timing

--echo ---> UPDATE statement; AFTER timing

DROP TRIGGER trg1;

CREATE TRIGGER trg1 AFTER UPDATE ON t1
  FOR EACH ROW
    SET @new_sum = @new_sum + NEW.num_value;

--error ER_TABLEACCESS_DENIED_ERROR
UPDATE t1 SET num_value = 20;

# DELETE statement; BEFORE timing

--echo ---> DELETE statement; BEFORE timing

DROP TRIGGER trg1;

CREATE TRIGGER trg1 BEFORE DELETE ON t1
  FOR EACH ROW
    SET @old_sum = @old_sum + OLD.num_value;

--error ER_TABLEACCESS_DENIED_ERROR
DELETE FROM t1;

# DELETE statement; AFTER timing

--echo ---> DELETE statement; AFTER timing

DROP TRIGGER trg1;

CREATE TRIGGER trg1 AFTER DELETE ON t1
  FOR EACH ROW
    SET @old_sum = @old_sum + OLD.num_value;

--error ER_TABLEACCESS_DENIED_ERROR
DELETE FROM t1;

#
# UPDATE privilege
#
# NOTE: At the moment, UPDATE privilege is required if the trigger contains
# NEW/OLD variables, whenever the trigger modifies them or not. Moreover,
# UPDATE privilege is checked for whole table, not for individual columns.
#
# The following test cases should be changed when full support of UPDATE
# privilege will be done.
#

--connection default
--echo
--echo ---> connection: default

use mysqltest_db1;

GRANT SELECT ON mysqltest_db1.t1 TO mysqltest_dfn@localhost;
REVOKE UPDATE ON mysqltest_db1.t1 FROM mysqltest_dfn@localhost;

--connection wl2818_definer_con
--echo
--echo ---> connection: wl2818_definer_con

use mysqltest_db1;

DROP TRIGGER trg1;

SET @new_sum = 0;
SET @old_sum = 0;

# INSERT INTO statement; BEFORE timing

--echo ---> INSERT INTO statement; BEFORE timing

CREATE TRIGGER trg1 BEFORE INSERT ON t1
  FOR EACH ROW
    SET @new_sum = @new_sum + NEW.num_value;

--error ER_TABLEACCESS_DENIED_ERROR
INSERT INTO t1 VALUES(4);

# INSERT INTO statement; AFTER timing

--echo ---> INSERT INTO statement; AFTER timing

DROP TRIGGER trg1;

CREATE TRIGGER trg1 AFTER INSERT ON t1
  FOR EACH ROW
    SET @new_sum = @new_sum + NEW.num_value;

--error ER_TABLEACCESS_DENIED_ERROR
INSERT INTO t1 VALUES(5);

# UPDATE statement; BEFORE timing

--echo ---> UPDATE statement; BEFORE timing

DROP TRIGGER trg1;

CREATE TRIGGER trg1 BEFORE UPDATE ON t1
  FOR EACH ROW
    SET @old_sum = @old_sum + OLD.num_value;

--error ER_TABLEACCESS_DENIED_ERROR
UPDATE t1 SET num_value = 10;

# UPDATE statement; AFTER timing

--echo ---> UPDATE statement; AFTER timing

DROP TRIGGER trg1;

CREATE TRIGGER trg1 AFTER UPDATE ON t1
  FOR EACH ROW
    SET @new_sum = @new_sum + NEW.num_value;

--error ER_TABLEACCESS_DENIED_ERROR
UPDATE t1 SET num_value = 20;

# DELETE statement; BEFORE timing

--echo ---> DELETE statement; BEFORE timing

DROP TRIGGER trg1;

CREATE TRIGGER trg1 BEFORE DELETE ON t1
  FOR EACH ROW
    SET @old_sum = @old_sum + OLD.num_value;

--error ER_TABLEACCESS_DENIED_ERROR
DELETE FROM t1;

# DELETE statement; AFTER timing

--echo ---> DELETE statement; AFTER timing

DROP TRIGGER trg1;

CREATE TRIGGER trg1 AFTER DELETE ON t1
  FOR EACH ROW
    SET @old_sum = @old_sum + OLD.num_value;

--error ER_TABLEACCESS_DENIED_ERROR
DELETE FROM t1;

#
# Check DEFINER clause of CREATE TRIGGER statement.
#
# NOTE: there is no dedicated TRIGGER privilege for CREATE TRIGGER statement.
# SUPER privilege is used instead. I.e., if one invokes CREATE TRIGGER, it should
# have SUPER privilege, so this test is meaningless right now.
#
#   - Check that SUPER privilege required to create a trigger with different
#     definer:
#     - try to create a trigger with DEFINER="definer@localhost" under
#       "invoker";
#     - analyze error code;
#   - Check that if the user specified as DEFINER does not exist, a warning is
#     emitted:
#     - create a trigger with DEFINER="non_existent_user@localhost" from
#       "definer";
#     - check that a warning emitted;
#   - Check that the definer of a trigger does not exist, the trigger will not
#     be activated:
#     - activate just created trigger;
#     - check error code;
#

--connection wl2818_definer_con
--echo
--echo ---> connection: wl2818_definer_con

use mysqltest_db1;

DROP TRIGGER trg1;

# Check that SUPER is required to specify different DEFINER.
# NOTE: meaningless at the moment

CREATE DEFINER='mysqltest_inv'@'localhost'
  TRIGGER trg1 BEFORE INSERT ON t1
  FOR EACH ROW
    SET @new_sum = 0;

# Create with non-existent user.

CREATE DEFINER='mysqltest_nonexs'@'localhost'
  TRIGGER trg2 AFTER INSERT ON t1
  FOR EACH ROW
    SET @new_sum = 0;

# Check that trg2 will not be activated.

--error ER_SPECIFIC_ACCESS_DENIED_ERROR
INSERT INTO t1 VALUES(6);

#
# Check that SHOW TRIGGERS statement provides "Definer" column.
#

SHOW TRIGGERS;

#
# Check that weird definer values do not break functionality. I.e. check the
# following definer values:
#   - '';
#   - '@';
#   - '@abc@def@@';
#   - '@hostname';
#   - '@abc@def@@@hostname';
#

DROP TRIGGER trg1;
DROP TRIGGER trg2;

CREATE TRIGGER trg1 BEFORE INSERT ON t1
  FOR EACH ROW
    SET @a = 1;

CREATE TRIGGER trg2 AFTER INSERT ON t1
  FOR EACH ROW
    SET @a = 2;

CREATE TRIGGER trg3 BEFORE UPDATE ON t1
  FOR EACH ROW
    SET @a = 3;

CREATE TRIGGER trg4 AFTER UPDATE ON t1
  FOR EACH ROW
    SET @a = 4;

CREATE TRIGGER trg5 BEFORE DELETE ON t1
  FOR EACH ROW
    SET @a = 5;

--exec egrep --text -v '^definers=' $MYSQL_TEST_DIR/var/master-data/mysqltest_db1/t1.TRG > $MYSQL_TEST_DIR/var/tmp/t1.TRG
--exec echo "definers='' '@' '@abc@def@@' '@hostname' '@abcdef@@@hostname'" >> $MYSQL_TEST_DIR/var/tmp/t1.TRG
--exec mv $MYSQL_TEST_DIR/var/tmp/t1.TRG $MYSQL_TEST_DIR/var/master-data/mysqltest_db1/t1.TRG

--echo

SELECT trigger_name, definer FROM INFORMATION_SCHEMA.TRIGGERS ORDER BY trigger_name;

--echo

SELECT * FROM INFORMATION_SCHEMA.TRIGGERS ORDER BY trigger_name;

#
# Cleanup
#

--connection default
--echo
--echo ---> connection: default

DROP USER mysqltest_dfn@localhost;
DROP USER mysqltest_inv@localhost;

DROP DATABASE mysqltest_db1;