^^&&^^

Edit File: consistent_snapshot.test

--source include/have_innodb.inc

# Save the initial number of concurrent sessions
--source include/count_sessions.inc

--disable_warnings
DROP TABLE IF EXISTS t1;
--enable_warnings

--echo # Establish connection con1 (user=root)
connect (con1,localhost,root,,);
--echo # Establish connection con2 (user=root)
connect (con2,localhost,root,,);

--echo ### Test 1:
--echo ### - While a consistent snapshot transaction is executed,
--echo ###   no external inserts should be visible to the transaction.

--echo # Switch to connection con1
connection con1;
CREATE TABLE t1 (a INT) ENGINE=innodb;
START TRANSACTION WITH CONSISTENT SNAPSHOT;

--echo # Switch to connection con2
connection con2;
INSERT INTO t1 VALUES(1);

--echo # Switch to connection con1
connection con1;
SELECT * FROM t1; # if consistent snapshot was set as expected, we
# should see nothing.
COMMIT;

--echo ### Test 2:
--echo ### - For any non-consistent snapshot transaction, external
--echo ###   committed inserts should be visible to the transaction.

DELETE FROM t1;
START TRANSACTION; # Now we omit WITH CONSISTENT SNAPSHOT

--echo # Switch to connection con2
connection con2;
INSERT INTO t1 VALUES(1);

--echo # Switch to connection con1
connection con1;
SELECT * FROM t1; # if consistent snapshot was not set, as expected, we
# should see 1.
COMMIT;

--echo ### Test 3:
--echo ### - Bug#44664: valgrind warning for COMMIT_AND_CHAIN and ROLLBACK_AND_CHAIN
--echo ###   Chaining a transaction does not retain consistency level.

START TRANSACTION WITH CONSISTENT SNAPSHOT;
DELETE FROM t1;
COMMIT WORK AND CHAIN;

--echo # Switch to connection con2
connection con2;
INSERT INTO t1 VALUES(1);

--echo # Switch to connection con1
connection con1;
SELECT * FROM t1; # if consistent snapshot was not set, as expected, we
# should see 1.
COMMIT;

--echo # Switch to connection default + close connections con1 and con2
connection default;
disconnect con1;
disconnect con2;
DROP TABLE t1;

# End of 4.1 tests

# Wait till all disconnects are completed
--source include/wait_until_count_sessions.inc