path: root/mysql-test/suite/innodb/t/innodb-isolation.test

#Note:- WL6742 has been removed from 5.7 (Bug 23046302),
#       but we are keeping this test since it tests
#       count(*) correctness for various isolation
#       levels.

--echo #
--echo # WL#6742 - Test the interaction of multiple transactions using
--echo # different isolation levels to make sure that the value returned
--echo # by count(*) always reflects the correct view of the table according
--echo # to the transaction's selected isolation level.
--echo #

--source include/have_innodb.inc

--disable_query_log
let $MYSQLD_DATADIR= `select @@datadir`;
let $initial_timeout=`select @@innodb_lock_wait_timeout`;
--enable_query_log

--echo #
--echo # Traverse various indexes to get the right counts.
--echo # This especially tests count(*) which is pushed down to InnoDB in WL#6742.
--echo #
CREATE TABLE t1 (
	c1 INT AUTO_INCREMENT PRIMARY KEY,
	c2 INT,
	c3 INT,
	c4 INT,
	INDEX k2(c2)
) Engine=InnoDB;
let $1=10;
while ($1 > 0) {
  INSERT INTO t1(c2,c3,c4) VALUES (1, 1, 1);
  dec $1;
}

CREATE TABLE t2 LIKE t1;
--enable_info
INSERT INTO t2 (SELECT * FROM t1);
--disable_info

--source suite/innodb/include/innodb_isolation_selects.inc

--echo #
--echo # Do some DML in the default connection and leave the transaction pending.
--echo #
SET SESSION TRANSACTION ISOLATION LEVEL REPEATABLE READ;
BEGIN;
--enable_info
UPDATE t1 SET c2 = c2 * 3 WHERE c1 = 1;
DELETE FROM t1 WHERE c1 = 6;
--disable_info
--source suite/innodb/include/innodb_isolation_selects.inc

--echo #
--echo # Start transactions of Repeatable Read, Read Committed, and Read Uncommitted
--echo #
--echo # Connection 1 REPEATABLE READ
--echo #
connect (con1,localhost,root,,);
SET SESSION TRANSACTION ISOLATION LEVEL REPEATABLE READ;
BEGIN;
--source suite/innodb/include/innodb_isolation_selects.inc
--enable_info
UPDATE t1 SET c2 = c2 * 5 WHERE c1 = 2;
DELETE FROM t1 WHERE c1 = 7;
INSERT INTO t1(c2,c3,c4) VALUES (100, 1, 1);
--disable_info
--source suite/innodb/include/innodb_isolation_selects.inc

--echo #
--echo # Test a lock wait timeout during COUNT(*)
--echo #
SET innodb_lock_wait_timeout = 1;
--error ER_LOCK_WAIT_TIMEOUT
SELECT COUNT(*) FROM t1 FOR UPDATE;


--echo #
--echo # Connection 2 READ COMMITTED
--echo #
connect (con2,localhost,root,,);
SET SESSION TRANSACTION ISOLATION LEVEL READ COMMITTED;
BEGIN;
--source suite/innodb/include/innodb_isolation_selects.inc
--enable_info
UPDATE t1 SET c2 = c2 * 7 WHERE c1 = 3;
DELETE FROM t1 WHERE c1 = 8;
INSERT INTO t1(c2,c3,c4) VALUES (1000, 1, 1);
--disable_info
--source suite/innodb/include/innodb_isolation_selects.inc

--echo #
--echo # Connection 3  READ UNCOMMITTED
--echo #
connect (con3,localhost,root,,);
SET SESSION TRANSACTION ISOLATION LEVEL READ UNCOMMITTED;
BEGIN;
--source suite/innodb/include/innodb_isolation_selects.inc
--enable_info
UPDATE t1 SET c2 = c2 * 11 WHERE c1 = 4;
INSERT INTO t1(c2,c3,c4) VALUES (10000, 1, 1);
DELETE FROM t1 WHERE c1 in(9);
--disable_info
--source suite/innodb/include/innodb_isolation_selects.inc

--echo #
--echo # Connection default REPEATABLE READ
--echo #
connection default;
--source suite/innodb/include/innodb_isolation_selects.inc

--echo #
--echo # Commit the 3 extra connections
--echo #
--echo # Connection 1 REPEATABLE READ
--echo #
connection con1;
--source suite/innodb/include/innodb_isolation_selects.inc

--echo #
--echo # Connection 2 READ COMMITTED
--echo #
connection con2;
--source suite/innodb/include/innodb_isolation_selects.inc

--echo #
--echo # Connection 3  READ UNCOMMITTED
--echo #
connection con3;
--source suite/innodb/include/innodb_isolation_selects.inc
COMMIT;
--source suite/innodb/include/innodb_isolation_selects.inc

--echo #
--echo # Connection 2 READ COMMITTED
--echo #
connection con2;
--source suite/innodb/include/innodb_isolation_selects.inc
COMMIT;
--source suite/innodb/include/innodb_isolation_selects.inc

--echo #
--echo # Connection 1 REPEATABLE READ
--echo #
connection con1;
--source suite/innodb/include/innodb_isolation_selects.inc

--echo #
--echo # Select the first 5 records FOR UPDATE using count(*) in a subquery.
--echo # The second record is still pending so we get a lock timeout.
--echo #
SET innodb_lock_wait_timeout = 1;
--error ER_LOCK_WAIT_TIMEOUT
SELECT c1, c2 FROM t1 WHERE c1 < ((SELECT COUNT(*) FROM t1) / 2) FOR UPDATE;
--error ER_LOCK_WAIT_TIMEOUT
SELECT COUNT(*) FROM t1 FOR UPDATE;
COMMIT;
--source suite/innodb/include/innodb_isolation_selects.inc

--echo #
--echo # Show The EXPLAIN output for these queries;
--echo #
# column 10 is the row count provided by handler::info().  In InnoDB, this is
# a statistical estimate.  After the multi-transactional changes above,
# Solaris reports 10 rows which is correct, but other OSes report 9.
--replace_column 10 #
EXPLAIN SELECT * FROM t1;
EXPLAIN SELECT COUNT(*) FROM t1;
EXPLAIN SELECT COUNT(c1) FROM t1;
--replace_column 10 #
EXPLAIN SELECT COUNT(c2) FROM t1;
--replace_column 10 #
EXPLAIN SELECT COUNT(c3) FROM t1;
--replace_column 10 #
EXPLAIN SELECT SUM(c1) FROM t1;
--replace_column 10 #
EXPLAIN SELECT SUM(c2) FROM t1;
--replace_column 10 #
EXPLAIN SELECT AVG(c1), MAX(c1), MIN(c2), AVG(c3), SUM(c4) FROM t1;
--replace_column 10 #
EXPLAIN SELECT c1, c2 FROM t1 WHERE c1 > ((SELECT COUNT(*) FROM t1) / 2);
--replace_column 10 #
EXPLAIN SELECT COUNT(c2) FROM t1 WHERE c1 > ((SELECT COUNT(*) FROM t1) / 2);
--replace_column 10 #
EXPLAIN SELECT COUNT(*) FROM t1 WHERE c1 > (SELECT AVG(c1) FROM t1);

--echo #
--echo # Make all indexes in t2 obsolete to the active repeatable read transaction
--echo # in the default connection.
--echo #
ALTER TABLE t2 row_format=redundant;

--echo #
--echo # Connection default REPEATABLE READ
--echo # Do more DML in the default REPEATABLE READ transaction in order to use recently committed records.
--echo #
connection default;
--source suite/innodb/include/innodb_isolation_selects.inc
--enable_info
UPDATE t1 SET c4 = c2 * 10;
--disable_info
--source suite/innodb/include/innodb_isolation_selects.inc

--echo #
--echo # Table t2 has been altered to a new row format.
--echo # The index should not be useable.
--echo #
--error ER_TABLE_DEF_CHANGED
SELECT COUNT(*) FROM t2;
--error ER_TABLE_DEF_CHANGED
SELECT * FROM t2;

COMMIT;
SELECT COUNT(*) FROM t2;
--source suite/innodb/include/innodb_isolation_selects.inc

--echo #
--echo # Connection 2
--echo #
connection con2;
--source suite/innodb/include/innodb_isolation_selects.inc

--echo #
--echo # Try COUNT(*) on a DISCARDED table.
--echo #
connection default;
CREATE TABLE t4 LIKE t1;
INSERT INTO t4 (SELECT * FROM t1);
SELECT COUNT(*) FROM t4;
ALTER TABLE t4 DISCARD TABLESPACE;
--error ER_TABLESPACE_DISCARDED
SELECT COUNT(*) FROM t4;


--echo #
--echo # Test the interaction of a repeatable read transaction
--echo # to changes that happen outside its view.
--echo #

CREATE TABLE t5 (a INT AUTO_INCREMENT PRIMARY KEY, b TEXT, aa INT, bb TEXT) Engine=InnoDB;
INSERT INTO t5(b) VALUES ("inserted by client 1");
INSERT INTO t5(b) VALUES ("inserted by client 1");
INSERT INTO t5(b) VALUES ("inserted by client 1");
INSERT INTO t5(b) VALUES ("inserted by client 1");
UPDATE t5 SET aa=a, bb=b;
CREATE TABLE t6 (a INT AUTO_INCREMENT PRIMARY KEY, b TEXT, aa INT, bb TEXT) Engine=InnoDB;
INSERT INTO t6(b) VALUES ("inserted by client 1");
INSERT INTO t6(b) VALUES ("inserted by client 1");
INSERT INTO t6(b) VALUES ("inserted by client 1");
INSERT INTO t6(b) VALUES ("inserted by client 1");
UPDATE t6 SET aa=a, bb=b;
CREATE TABLE t7 (a INT AUTO_INCREMENT PRIMARY KEY, b TEXT, aa INT, bb TEXT) Engine=InnoDB;
INSERT INTO t7(b) VALUES ("inserted by client 1");
INSERT INTO t7(b) VALUES ("inserted by client 1");
INSERT INTO t7(b) VALUES ("inserted by client 1");
INSERT INTO t7(b) VALUES ("inserted by client 1");
UPDATE t7 SET aa=a, bb=b;
BEGIN;
SELECT * FROM t5;
SELECT COUNT(*) FROM t5;
SELECT * FROM t6;
SELECT COUNT(*) FROM t6;
SELECT * FROM t7;
SELECT COUNT(*) FROM t7;

--echo #
--echo # Connection 1
--echo #
connection con1;
INSERT INTO t5(b) VALUES ("inserted by client 2");
UPDATE t5 SET a = 10 where a = 1;
UPDATE t5 SET b = "updated by client 2" where a = 2;
DELETE FROM t5 WHERE a = 3;
SELECT * FROM t5;
SELECT COUNT(*) FROM t5;
INSERT INTO t6(b) VALUES ("inserted by client 2");
UPDATE t6 SET a = 10 where a = 1;
UPDATE t6 SET b = "updated by client 2" where a = 2;
DELETE FROM t6 WHERE a = 3;
SELECT * FROM t6;
SELECT COUNT(*) FROM t6;
INSERT INTO t7(b) VALUES ("inserted by client 2");
UPDATE t7 SET a = 10 where a = 1;
UPDATE t7 SET b = "updated by client 2" where a = 2;
DELETE FROM t7 WHERE a = 3;
SELECT * FROM t7;
SELECT COUNT(*) FROM t7;

--echo #
--echo # Connection default
--echo #
connection default;
SELECT * FROM t5;
INSERT INTO t5(b) VALUES ("inserted by client 1");
SELECT * FROM t5;
UPDATE t5 SET a = a + 100;
SELECT * FROM t5;
SELECT COUNT(*) FROM t5;

UPDATE t6 SET b = "updated by client 2";
SELECT * FROM t6;
SELECT COUNT(*) FROM t6;

DELETE FROM t7;
SELECT * FROM t7;
SELECT COUNT(*) FROM t7;

COMMIT;
SELECT * FROM t5;
SELECT COUNT(*) FROM t5;
SELECT * FROM t6;
SELECT COUNT(*) FROM t6;
SELECT * FROM t7;
SELECT COUNT(*) FROM t7;

--echo #
--echo # Cleanup
--echo #
DROP TABLE t1,t2,t4,t5,t6,t7;
disconnect con1;
disconnect con2;
disconnect con3;
--disable_query_log
eval set global innodb_lock_wait_timeout=$initial_timeout;
--enable_query_log

--echo #
--echo # Bug #23596760: FORCE INDEX IS SKIPPED WHILE EXECUTING SELECT COUNT(*)
--echo #

CREATE TABLE t1(c1 INT NOT NULL PRIMARY KEY,
                c2 INT NOT NULL DEFAULT 1,
                c3 char(20) DEFAULT '',
                KEY c2_idx (c2)) ENGINE=InnoDB;

INSERT INTO t1(c1) VALUES (1), (2), (3);
INSERT INTO t1(c1) SELECT c1 + 10 FROM t1;
INSERT INTO t1(c1) SELECT c1 + 100 FROM t1;

CREATE TABLE t2 SELECT * FROM t1;

let query1= SELECT COUNT(*) FROM t1;
let query2= SELECT COUNT(*) FROM t1 FORCE INDEX(c2_idx);
let query3= SELECT COUNT(*) FROM t1, t2;
let query4= SELECT COUNT(*) FROM t1 FORCE INDEX(c2_idx), t2;

eval EXPLAIN $query1;
eval EXPLAIN $query2;
eval EXPLAIN $query3;
eval EXPLAIN $query4;

DROP TABLE t1, t2;