#
# Bug#20837 Apparent change of isolation level 
#           during transaction
#
# Bug#53343 completion_type=1, COMMIT/ROLLBACK 
#           AND CHAIN don't preserve the isolation 
#           level
connection default;
SET SESSION TRANSACTION ISOLATION LEVEL REPEATABLE READ;
CREATE TABLE t1 (s1 INT) ENGINE=InnoDB;
INSERT INTO t1 VALUES (1),(2);
COMMIT;
START TRANSACTION;
SET TRANSACTION ISOLATION LEVEL SERIALIZABLE;
ERROR 25001: Transaction characteristics can't be changed while a transaction is in progress
COMMIT;
SET @@autocommit=0;
COMMIT;
SET TRANSACTION ISOLATION LEVEL READ UNCOMMITTED;
START TRANSACTION;
SELECT @@tx_isolation;
@@tx_isolation
REPEATABLE-READ
Should be REPEATABLE READ
SELECT * FROM t1;
s1
1
2
SELECT @@tx_isolation;
@@tx_isolation
REPEATABLE-READ
Should be REPEATABLE READ
INSERT INTO t1 VALUES (-1);
SELECT @@tx_isolation;
@@tx_isolation
REPEATABLE-READ
Should be REPEATABLE READ
COMMIT;
START TRANSACTION;
SELECT * FROM t1;
s1
1
2
-1
SET SESSION TRANSACTION ISOLATION LEVEL READ COMMITTED;
connection con1
START TRANSACTION;
INSERT INTO t1 VALUES (1000);
COMMIT;
connection default
We should not be able to read the '1000'
SELECT * FROM t1;
s1
1
2
-1
COMMIT;
Now, the '1000' should appear.
START TRANSACTION;
SELECT * FROM t1;
s1
1
2
-1
1000
COMMIT;
SET SESSION TRANSACTION ISOLATION LEVEL REPEATABLE READ;
connection default
SET TRANSACTION ISOLATION LEVEL READ COMMITTED;
START TRANSACTION;
connection con1
START TRANSACTION;
INSERT INTO t1 VALUES (1001);
COMMIT;
connection default
SELECT COUNT(*) FROM t1 WHERE s1 = 1001;
COUNT(*)
1
Should be 1
COMMIT AND CHAIN;
connection con1
INSERT INTO t1 VALUES (1002);
COMMIT;
connection default
SELECT COUNT(*) FROM t1 WHERE s1 = 1002;
COUNT(*)
1
Should be 1
COMMIT;
SELECT * FROM t1;
s1
1
2
-1
1000
1001
1002
DELETE FROM t1 WHERE s1 >= 1000;
COMMIT;
connection default
SET TRANSACTION ISOLATION LEVEL READ COMMITTED;
START TRANSACTION;
connection con1
START TRANSACTION;
INSERT INTO t1 VALUES (1001);
COMMIT;
connection default
SELECT COUNT(*) FROM t1 WHERE s1 = 1001;
COUNT(*)
1
Should be 1
ROLLBACK AND CHAIN;
connection con1
INSERT INTO t1 VALUES (1002);
COMMIT;
connection default
SELECT COUNT(*) FROM t1 WHERE s1 = 1002;
COUNT(*)
1
Should be 1
COMMIT;
SELECT * FROM t1;
s1
1
2
-1
1001
1002
DELETE FROM t1 WHERE s1 >= 1000;
COMMIT;
SET @@completion_type=1;
connection default
SET TRANSACTION ISOLATION LEVEL READ COMMITTED;
START TRANSACTION;
connection con1
START TRANSACTION;
INSERT INTO t1 VALUES (1001);
COMMIT;
connection default
SELECT * FROM t1 WHERE s1 >= 1000;
s1
1001
Should see 1001
COMMIT AND NO CHAIN;
default transaction is now in REPEATABLE READ
connection con1
INSERT INTO t1 VALUES (1002);
COMMIT;
connection default
SELECT * FROM t1 WHERE s1 >= 1000;
s1
1001
1002
Should see 1001 and 1002
connection con1
INSERT INTO t1 VALUES (1003);
COMMIT;
connection default
SELECT * FROM t1 WHERE s1 >= 1000;
s1
1001
1002
Should see 1001 and 1002, but NOT 1003
COMMIT;
SELECT * FROM t1;
s1
1
2
-1
1001
1002
1003
DELETE FROM t1 WHERE s1 >= 1000;
COMMIT AND NO CHAIN;
SET @@completion_type=0;
COMMIT;
connection default
SET @@completion_type=1;
COMMIT AND NO CHAIN;
SET TRANSACTION ISOLATION LEVEL READ COMMITTED;
START TRANSACTION;
connection con1
START TRANSACTION;
INSERT INTO t1 VALUES (1001);
COMMIT;
connection default
SELECT * FROM t1 WHERE s1 >= 1000;
s1
1001
Should see 1001
ROLLBACK AND NO CHAIN;
default transaction is now in REPEATABLE READ
connection con1
INSERT INTO t1 VALUES (1002);
COMMIT;
connection default
SELECT * FROM t1 WHERE s1 >= 1000;
s1
1001
1002
Should see 1001 and 1002
connection con1
INSERT INTO t1 VALUES (1003);
COMMIT;
connection default
SELECT * FROM t1 WHERE s1 >= 1000;
s1
1001
1002
Should see 1001 and 1002, but NOT 1003
COMMIT;
SELECT * FROM t1;
s1
1
2
-1
1001
1002
1003
DELETE FROM t1 WHERE s1 >= 1000;
COMMIT AND NO CHAIN;
SET @@completion_type=0;
COMMIT;
connection default
SET TRANSACTION ISOLATION LEVEL	READ COMMITTED;
SET SESSION TRANSACTION ISOLATION LEVEL REPEATABLE READ;
START TRANSACTION;
SELECT * FROM t1;
s1
1
2
-1
connection con1
INSERT INTO t1 VALUES (1000);
COMMIT;
connection default
SELECT * FROM t1;
s1
1
2
-1
Should get same result as above (i.e should not read '1000')
COMMIT;
DELETE FROM t1 WHERE s1 >= 1000;
COMMIT;
SET @@completion_type=1;
COMMIT AND NO CHAIN;
SET TRANSACTION ISOLATION LEVEL READ COMMITTED;
START TRANSACTION;
TRUNCATE TABLE t1;
INSERT INTO t1 VALUES (1000);
SELECT * FROM t1;
s1
1000
Should read '1000'
connection con1
INSERT INTO t1 VALUES (1001);
COMMIT;
connection default
SELECT * FROM t1;
s1
1000
Should only read the '1000' as this transaction is now in REP READ
COMMIT AND NO CHAIN;
SET @@completion_type=0;
COMMIT AND NO CHAIN;
SET @@autocommit=1;
COMMIT;
DROP TABLE t1;
#
# End of test cases for Bug#20837
#
#
# WL#5968 Implement START TRANSACTION READ (WRITE|ONLY);
#
#
# Test 1: Check supported syntax
START TRANSACTION;
COMMIT;
START TRANSACTION READ ONLY;
COMMIT;
START TRANSACTION READ WRITE;
COMMIT;
START TRANSACTION READ ONLY, READ WRITE;
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near '' at line 1
START TRANSACTION READ ONLY, WITH CONSISTENT SNAPSHOT;
COMMIT;
START TRANSACTION READ WRITE, WITH CONSISTENT SNAPSHOT;
COMMIT;
START TRANSACTION WITH CONSISTENT SNAPSHOT, READ ONLY;
COMMIT;
START TRANSACTION WITH CONSISTENT SNAPSHOT, READ WRITE;
COMMIT;
START TRANSACTION READ ONLY, WITH CONSISTENT SNAPSHOT, READ WRITE;
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near '' at line 1
SET TRANSACTION READ ONLY;
SET TRANSACTION READ WRITE;
SET TRANSACTION ISOLATION LEVEL SERIALIZABLE, READ ONLY;
SET TRANSACTION ISOLATION LEVEL SERIALIZABLE, READ WRITE;
SET TRANSACTION READ ONLY, ISOLATION LEVEL READ COMMITTED;
SET TRANSACTION READ WRITE, ISOLATION LEVEL READ COMMITTED;
SET TRANSACTION READ ONLY, READ WRITE;
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'READ WRITE' at line 1
COMMIT;
#
# Test 2: Check setting of variable.
SET SESSION TRANSACTION READ WRITE;
SELECT @@tx_read_only;
@@tx_read_only
0
SET SESSION TRANSACTION READ ONLY;
SELECT @@tx_read_only;
@@tx_read_only
1
SET SESSION TRANSACTION ISOLATION LEVEL REPEATABLE READ, READ WRITE;
SELECT @@tx_read_only;
@@tx_read_only
0
SET SESSION TRANSACTION READ ONLY, ISOLATION LEVEL REPEATABLE READ;
SELECT @@tx_read_only;
@@tx_read_only
1
START TRANSACTION;
# Not allowed inside a transaction
SET TRANSACTION READ ONLY;
ERROR 25001: Transaction characteristics can't be changed while a transaction is in progress
# But these are allowed.
SET SESSION TRANSACTION READ ONLY;
SET GLOBAL TRANSACTION READ ONLY;
COMMIT;
SET SESSION TRANSACTION READ WRITE;
SET GLOBAL TRANSACTION READ WRITE;
#
# Test 3: Test that write operations are properly blocked.
CREATE TABLE t1(a INT);
CREATE TEMPORARY TABLE temp_t2(a INT);
SET SESSION TRANSACTION READ ONLY;
# 1: DDL should be blocked, also on temporary tables.
CREATE TABLE t3(a INT);
ERROR 25006: Cannot execute statement in a READ ONLY transaction.
ALTER TABLE t1 COMMENT "Test";
ERROR 25006: Cannot execute statement in a READ ONLY transaction.
DROP TABLE t1;
ERROR 25006: Cannot execute statement in a READ ONLY transaction.
CREATE TEMPORARY TABLE temp_t3(a INT);
ERROR 25006: Cannot execute statement in a READ ONLY transaction.
ALTER TABLE temp_t2 COMMENT "Test";
ERROR 25006: Cannot execute statement in a READ ONLY transaction.
DROP TEMPORARY TABLE temp_t2;
ERROR 25006: Cannot execute statement in a READ ONLY transaction.
CREATE FUNCTION f1() RETURNS INT RETURN 1;
ERROR 25006: Cannot execute statement in a READ ONLY transaction.
DROP FUNCTION f1;
ERROR 25006: Cannot execute statement in a READ ONLY transaction.
CREATE PROCEDURE p1() BEGIN END;
ERROR 25006: Cannot execute statement in a READ ONLY transaction.
DROP PROCEDURE p1;
ERROR 25006: Cannot execute statement in a READ ONLY transaction.
CREATE VIEW v1 AS SELECT 1;
ERROR 25006: Cannot execute statement in a READ ONLY transaction.
SET SESSION TRANSACTION READ WRITE;
CREATE VIEW v1 AS SELECT 1;
SET SESSION TRANSACTION READ ONLY;
DROP VIEW v1;
ERROR 25006: Cannot execute statement in a READ ONLY transaction.
SET SESSION TRANSACTION READ WRITE;
DROP VIEW v1;
SET SESSION TRANSACTION READ ONLY;
RENAME TABLE t1 TO t2;
ERROR 25006: Cannot execute statement in a READ ONLY transaction.
RENAME TABLE temp_t2 TO temp_t3;
ERROR 25006: Cannot execute statement in a READ ONLY transaction.
TRUNCATE TABLE t1;
ERROR 25006: Cannot execute statement in a READ ONLY transaction.
CREATE DATABASE db1;
ERROR 25006: Cannot execute statement in a READ ONLY transaction.
DROP DATABASE db1;
ERROR 25006: Cannot execute statement in a READ ONLY transaction.
SET SESSION TRANSACTION READ WRITE;
# 2: DML should be blocked on non-temporary tables.
START TRANSACTION READ ONLY;
INSERT INTO t1 VALUES (1), (2);
ERROR 25006: Cannot execute statement in a READ ONLY transaction.
UPDATE t1 SET a= 3;
ERROR 25006: Cannot execute statement in a READ ONLY transaction.
DELETE FROM t1;
ERROR 25006: Cannot execute statement in a READ ONLY transaction.
# 3: DML should be allowed on temporary tables.
INSERT INTO temp_t2 VALUES (1), (2);
UPDATE temp_t2 SET a= 3;
DELETE FROM temp_t2;
# 4: Queries should not be blocked.
SELECT * FROM t1;
a
SELECT * FROM temp_t2;
a
HANDLER t1 OPEN;
HANDLER t1 READ FIRST;
a
HANDLER t1 CLOSE;
HANDLER temp_t2 OPEN;
HANDLER temp_t2 READ FIRST;
a
HANDLER temp_t2 CLOSE;
# 5: Prepared statements
PREPARE stmt FROM "DELETE FROM t1";
ERROR 25006: Cannot execute statement in a READ ONLY transaction.
PREPARE stmt FROM "DELETE FROM temp_t2";
EXECUTE stmt;
DEALLOCATE PREPARE stmt;
COMMIT;
# 6: Stored routines
CREATE FUNCTION f1() RETURNS INT
BEGIN
DELETE FROM t1;
RETURN 1;
END|
CREATE FUNCTION f2() RETURNS INT
BEGIN
DELETE FROM temp_t2;
RETURN 1;
END|
CREATE PROCEDURE p1() DELETE FROM t1;
CREATE PROCEDURE p2() DELETE FROM temp_t2;
START TRANSACTION READ ONLY;
SELECT f1();
ERROR 25006: Cannot execute statement in a READ ONLY transaction.
SELECT f2();
f2()
1
CALL p1();
ERROR 25006: Cannot execute statement in a READ ONLY transaction.
CALL p2();
COMMIT;
DROP FUNCTION f1;
DROP FUNCTION f2;
DROP PROCEDURE p1;
DROP PROCEDURE p2;
# 7: Views
CREATE VIEW v1 AS SELECT a FROM t1;
START TRANSACTION READ ONLY;
INSERT INTO v1 VALUES (1), (2);
ERROR 25006: Cannot execute statement in a READ ONLY transaction.
SELECT * FROM v1;
a
COMMIT;
DROP VIEW v1;
# 8: LOCK TABLE
SET SESSION TRANSACTION READ ONLY;
LOCK TABLE t1 WRITE;
ERROR 25006: Cannot execute statement in a READ ONLY transaction.
LOCK TABLE t1 READ;
UNLOCK TABLES;
SET SESSION TRANSACTION READ WRITE;
DROP TABLE temp_t2, t1;
#
# Test 4: SET TRANSACTION, CHAINing transactions
CREATE TABLE t1(a INT);
SET SESSION TRANSACTION READ ONLY;
START TRANSACTION;
DELETE FROM t1;
ERROR 25006: Cannot execute statement in a READ ONLY transaction.
COMMIT;
START TRANSACTION READ WRITE;
DELETE FROM t1;
COMMIT;
SET SESSION TRANSACTION READ WRITE;
SET TRANSACTION READ ONLY;
START TRANSACTION;
DELETE FROM t1;
ERROR 25006: Cannot execute statement in a READ ONLY transaction.
COMMIT;
START TRANSACTION READ WRITE;
DELETE FROM t1;
COMMIT;
START TRANSACTION READ ONLY;
SELECT * FROM t1;
a
COMMIT AND CHAIN;
DELETE FROM t1;
ERROR 25006: Cannot execute statement in a READ ONLY transaction.
COMMIT;
START TRANSACTION READ ONLY;
SELECT * FROM t1;
a
ROLLBACK AND CHAIN;
DELETE FROM t1;
ERROR 25006: Cannot execute statement in a READ ONLY transaction.
COMMIT;
DROP TABLE t1;
#
# Test 5: Test that reserved keyword ONLY is still allowed as
#         identifier - both directly and in SPs.
SET @only= 1;
CREATE TABLE t1 (only INT);
INSERT INTO t1 (only) values (1);
SELECT only FROM t1 WHERE only = 1;
only
1
DROP TABLE t1;
CREATE PROCEDURE p1()
BEGIN
DECLARE only INT DEFAULT 1;
END|
CALL p1();
DROP PROCEDURE p1;
#
# Test 6: Check that XA transactions obey default access mode.
CREATE TABLE t1(a INT);
SET TRANSACTION READ ONLY;
XA START 'test1';
INSERT INTO t1 VALUES (1);
ERROR 25006: Cannot execute statement in a READ ONLY transaction.
UPDATE t1 SET a=2;
ERROR 25006: Cannot execute statement in a READ ONLY transaction.
DELETE FROM t1;
ERROR 25006: Cannot execute statement in a READ ONLY transaction.
XA END 'test1';
XA PREPARE 'test1';
XA COMMIT 'test1';
DROP TABLE t1;
#
# Test 7: SET TRANSACTION inside stored routines
CREATE PROCEDURE p1() SET SESSION TRANSACTION READ ONLY;
CALL p1();
SELECT @@tx_read_only;
@@tx_read_only
1
SET SESSION TRANSACTION READ WRITE;
DROP PROCEDURE p1;
CREATE PROCEDURE p1() SET SESSION TRANSACTION READ ONLY,
ISOLATION LEVEL SERIALIZABLE;
CALL p1();
SELECT @@tx_read_only;
@@tx_read_only
1
SET SESSION TRANSACTION READ WRITE, ISOLATION LEVEL REPEATABLE READ;
DROP PROCEDURE p1;
CREATE FUNCTION f1() RETURNS INT
BEGIN
SET SESSION TRANSACTION READ ONLY;
RETURN 1;
END|
SELECT f1();
f1()
1
SELECT @@tx_read_only;
@@tx_read_only
1
SET SESSION TRANSACTION READ WRITE;
DROP FUNCTION f1;
CREATE FUNCTION f1() RETURNS INT
BEGIN
SET SESSION TRANSACTION ISOLATION LEVEL SERIALIZABLE, READ ONLY;
RETURN 1;
END|
SELECT f1();
f1()
1
SELECT @@tx_read_only;
@@tx_read_only
1
SET SESSION TRANSACTION ISOLATION LEVEL REPEATABLE READ, READ WRITE;
DROP FUNCTION f1;
#
# Test 8: SET TRANSACTION and auto-commit
SELECT @@autocommit;
@@autocommit
1
CREATE TABLE t1(a INT) engine=InnoDB;
SET TRANSACTION READ ONLY;
SELECT * FROM t1;
a
# This statement should work, since last statement committed.
INSERT INTO t1 VALUES (1);
DROP TABLE t1;