polardbxengine/mysql-test/suite/xengine_main/t/is_lock_table.test

# WL#6599 - Testing IS queries in LOCK TABLES.
# The details about why we have special focus about LOCK TABLE
# and IS queries can be found in commit message.

# Note that we are going to hide DD tables from users
# so that we avoid direct use of DD tables in user queries.
# So the below test do not include such cases.

CREATE TABLE t1 (f1 int);
INSERT INTO t1 VALUES (1);
CREATE TABLE t2 AS SELECT * FROM t1;
CREATE TABLE t3 AS SELECT * FROM t1;
CREATE VIEW v1 AS SELECT * FROM t3;


--echo Case 1: IS query under 'FLUSH TABLES' command.

FLUSH TABLES WITH READ LOCK;
SELECT COUNT(*) FROM information_schema.columns
                WHERE table_name='db';
UNLOCK TABLES;


--echo Case 2: Simple IS query under 'LOCK TABLE' command.

LOCK TABLE t1 READ, v1 READ;
SELECT COUNT(*) FROM t1;
SELECT COUNT(*) FROM v1;

--echo Test that IS view will be opened without explicit LOCK TABLE on them.
SELECT COUNT(*) FROM information_schema.columns WHERE table_name='db';

--echo Test that join between two IS views work fine in LOCK TABLE mode.
SELECT COUNT(*) FROM information_schema.tables m
                     JOIN information_schema.columns n
                     ON m.table_name = n.table_name
                WHERE m.table_name='db';

--echo Test that IS view will be opened along with other locked tables.
SELECT COUNT(*) FROM information_schema.columns, t1
                WHERE table_name='db';
SELECT COUNT(*) FROM information_schema.columns, v1
                WHERE table_name='db';

--echo Test that we fail when tring to use user table that is not locked
--echo along with IS view.
--error ER_TABLE_NOT_LOCKED
SELECT COUNT(*) FROM information_schema.columns, t2
                WHERE table_name='db';

UNLOCK TABLES;


--echo Case 3: IS query inside SP + SF + LOCK TABLE combination.

DELIMITER $;
CREATE FUNCTION func1()
RETURNS INT DETERMINISTIC
BEGIN
  DECLARE a int;
  SELECT COUNT(*) INTO a
    FROM information_schema.columns
    WHERE table_name='db';
  RETURN a;
END $

CREATE PROCEDURE proc1()
BEGIN
  DECLARE i INT;
  SELECT (func1() + COUNT(*)) INTO i
    FROM information_schema.tables m
         JOIN information_schema.columns n
         ON m.table_name = n.table_name
    WHERE m.table_name='db';
  INSERT INTO t1 VALUES (i);
END $
DELIMITER ;$

--echo Testing IS view inside SP + SF, not in LOCK TABLE.
CALL proc1();
SELECT * FROM t1;

--echo Enter LOCK TABLE mode.
LOCK TABLE t1 WRITE, t1 as X READ, t3 READ;

--echo Testing IS view inside SF.
SELECT func1() as COUNT_FROM_SP FROM t3;

--echo Testing IS view in outer query and also inside a SF.
SELECT func1() as COUNT_FROM_SP, COUNT(*) FROM information_schema.tables m
                     JOIN information_schema.columns n
                     ON m.table_name = n.table_name
                     WHERE m.table_name='db';

--echo Testing IS view inside SP + SF, in LOCK TABLE mode.
CALL proc1();
SELECT * FROM t1 as X;

UNLOCK TABLES;

--echo Case 3: IS query inside SP + Trigger + LOCK TABLE combination.

CREATE TRIGGER trig1 AFTER INSERT ON t1 FOR EACH ROW
  INSERT INTO t2 SELECT COUNT(*)>1 FROM information_schema.columns;

--echo Invoking trigger with IS not in LOCK TABLE mode.
INSERT INTO t1 VALUES(1);
SELECT * FROM t2;

LOCK TABLE t1 WRITE, t2 WRITE;

--echo Invoking trigger with IS in LOCK TABLE mode.
INSERT INTO t1 VALUES(1);
SELECT * FROM t2;

UNLOCK TABLES;

#comment by xengine
#--echo Case 4: IS query under SERIALIZABLE ISOLATION + AUTO_COMMIT OFF
#--echo         + LOCK TABLE + I_S query + DROP TABLE.
#--echo
#--echo   DROP TABLE should success. If I_S query doesn't do non-locking read,
#--echo   then the DROP TABLE would block, waiting for innodb lock to be release
#--echo   until transaction is committed.
#SET TRANSACTION_ISOLATION='SERIALIZABLE';
#SET AUTOCOMMIT=0;
#LOCK TABLES t1 READ;
#SELECT COUNT(*) > 0 FROM information_schema.tables;
#connect (con1, localhost, root,,);
DROP TABLE t2;
#connection default;
#UNLOCK TABLES;
#disconnect con1;
#SET TRANSACTION_ISOLATION=default;
#SET AUTOCOMMIT=default;

# Cleanup
DROP TABLE t1, t3;
DROP VIEW v1;
DROP FUNCTION func1;
DROP PROCEDURE proc1;


--source suite/xengine/include/check_xengine_log_error.inc