mariadb/mysql-test/main/simultaneous_assignment.test

-- source include/have_innodb.inc
SET sql_mode='STRICT_TRANS_TABLES,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION,SIMULTANEOUS_ASSIGNMENT';

--echo #
--echo # MDEV-13417 UPDATE produces wrong values if an UPDATEd column is later used as an UPDATE source
--echo #

CREATE TABLE t1 (c1 INTEGER, c2 INTEGER, c3 INTEGER) ENGINE=InnoDb;
INSERT INTO t1(c1,c2,c3) VALUES (1,1,1);
CREATE TABLE  t2 (c1 INTEGER, c2 INTEGER, c3 INTEGER) ENGINE=InnoDb;
INSERT INTO t2(c1,c2,c3) VALUES (1,1,1);

--echo #
--echo # Check that a column is only updated once.
--echo #

--error ER_UPDATED_COLUMN_ONLY_ONCE
UPDATE t1
   SET c1 = 1,
       c1 = 2;

--error ER_UPDATED_COLUMN_ONLY_ONCE
UPDATE t1, t2
   SET t1.c1 = t1.c1 + 1,
       t1.c2 = t1.c1 + 1,
       t2.c2 = t1.c2 + 1,
       t2.c2 = t1.c2 + 1;

--echo #
--echo # Check standard update
--echo #
--disable_view_protocol
UPDATE t1
   SET c1 = c1+1,
       c2 = c1+1,
       c3 = c2+1
 WHERE c1=10;

START TRANSACTION;
UPDATE t1
   SET c1 = c1+1,
       c2 = c1+1,
       c3 = c2+1;
SELECT * FROM t1;
ROLLBACK;
--enable_view_protocol

--echo #
--echo # Check update through a single view
--echo #

CREATE VIEW v1 (a, b) AS SELECT c1, c2 FROM t1;
--error ER_UPDATED_COLUMN_ONLY_ONCE
UPDATE v1
   SET a = 10,
       a = b+1;
SELECT * FROM t1;
DROP VIEW v1;

CREATE VIEW v1 (a, b) AS SELECT c2, c2 FROM t1;
--error ER_UPDATED_COLUMN_ONLY_ONCE
UPDATE v1
   SET a = 10,
       b = 20;
SELECT * FROM t1;
DROP VIEW v1;

--echo #
--echo # Check update through a multi table view
--echo #

CREATE VIEW v1 (a, b) AS SELECT t1.c1, t2.c1  FROM t1, t2 WHERE t1.c1=t2.c1;
--error ER_VIEW_MULTIUPDATE
UPDATE v1
   SET a = 10,
       b = 20;
       
--disable_view_protocol
START TRANSACTION;
UPDATE v1
   SET a = 10;
ROLLBACK;

--error ER_UPDATED_COLUMN_ONLY_ONCE
UPDATE v1
   SET a = 10,
       a = a + 1;
DROP VIEW v1;

--echo #
--echo # Check multi update
--echo #

START TRANSACTION;
UPDATE t1, t2
   SET t1.c1 = t1.c1 + 1,
       t1.c2 = t1.c1 + 1,
       t2.c2 = t1.c2 + 1,
       t2.c3 = t2.c2 + 1
WHERE t1.c1=t2.c1;
SELECT * FROM t1;
SELECT * FROM t2;
ROLLBACK;

DELIMITER /;
CREATE TRIGGER tr1 BEFORE UPDATE ON t1 FOR EACH ROW
BEGIN
  INSERT INTO t2 VALUES(10+old.c1,10+old.c2,10+old.c3);
  INSERT INTO t2 VALUES(20+new.c1,10+new.c2,10+new.c3);
END;
/
DELIMITER ;/
START TRANSACTION;
UPDATE t1
   SET c1 = c1+1,
       c2 = c1+1,
       c3 = c2+1;
SELECT * FROM t1;
SELECT * FROM t2;
ROLLBACK;
--enable_view_protocol

DROP TABLE t1;
DROP TABLE t2;

--echo #
--echo # Check update fired by INSERT ... ON DUPLICATE KEY UPDATE
--echo #

CREATE TABLE t1 (
  id INT(11) NOT NULL AUTO_INCREMENT,
  name VARCHAR(60) NOT NULL,
  nb_visits INT NOT NULL,
  nb_visits_prev INT NOT NULL default 0,
  PRIMARY KEY (id),
  UNIQUE KEY name (name)
) ENGINE=InnoDB AUTO_INCREMENT=1;

INSERT INTO t1(name, nb_visits) VALUES('nico', 1)
    ON DUPLICATE KEY UPDATE nb_visits = nb_visits + 1;
SELECT * FROM t1;
INSERT INTO t1(name, nb_visits) VALUES('nico', 1)
        ON DUPLICATE KEY UPDATE nb_visits = nb_visits + 1, nb_visits_prev=nb_visits;
SELECT * FROM t1;
DROP TABLE t1;

--echo #
--echo # Update table with virtual column
--echo #

CREATE TABLE t1 (c1 INTEGER, c2 INTEGER, c3 INTEGER AS (c1 MOD 10) VIRTUAL, c4 INTEGER AS (c1+c2 MOD 5) PERSISTENT ) ENGINE=InnoDb;
INSERT INTO t1(c1,c2) VALUES (1,1);

SELECT * FROM t1;
UPDATE t1 SET c2 = 10, c1 = c2;
SELECT * FROM t1;
UPDATE t1 SET c2 = 4, c1 = c2;
SELECT * FROM t1;
DROP TABLE t1;

--echo #
--echo # Update dynamic column
--echo #
SET @@local.character_set_connection='latin1';
CREATE TABLE assets (
  item_name VARCHAR(32) PRIMARY KEY,
  dynamic_col1  BLOB,
  dynamic_col2  BLOB
);

INSERT INTO assets VALUES ('Thinkpad Laptop', COLUMN_CREATE('color', 'black', 'price', 500),COLUMN_CREATE('CPU', 'Core I7', 'memory', '8Go'));
INSERT INTO assets VALUES ('Thinkpad Laptop2', COLUMN_CREATE('color', 'yellow', 'price', 700),COLUMN_CREATE('CPU', 'Core I7', 'memory', '16Go'));
SELECT item_name, COLUMN_GET(dynamic_col1, 'color' as char) AS color1,
       COLUMN_GET(dynamic_col2, 'color' as char) AS color2
  FROM assets;
UPDATE assets
   SET dynamic_col1=COLUMN_ADD(dynamic_col1, 'warranty', '3 years'),
       dynamic_col2=dynamic_col1
 WHERE item_name LIKE 'Thinkpad Laptop%';

SELECT item_name, COLUMN_GET(dynamic_col1, 'warranty' as char) AS waranty1,
       COLUMN_GET(dynamic_col2, 'warranty' as char) AS waranty2,
       COLUMN_GET(dynamic_col2, 'color' as char) AS color2
  FROM assets;

DROP TABLE assets;

--echo #
--echo # Update TEXT column
--echo #

CREATE TABLE ft2(copy TEXT,copy2 TEXT,FULLTEXT(copy)) ENGINE=MyISAM;
INSERT INTO ft2(copy) VALUES
 ('MySQL vs MariaDB database'),
 ('Oracle vs MariaDB database'),
 ('PostgreSQL vs MariaDB database'),
 ('MariaDB overview'),
 ('Foreign keys'),
 ('Primary keys'),
 ('Indexes'),
 ('Transactions'),
 ('Triggers');
SELECT * FROM ft2;
UPDATE ft2 SET copy = UPPER(copy),
               copy2= copy;
SELECT * FROM ft2;
DROP TABLE ft2;