--source include/have_innodb.inc
--source include/count_sessions.inc

# Ensure that the history list length will actually be decremented by purge.
SET @saved_frequency = @@GLOBAL.innodb_purge_rseg_truncate_frequency;
SET GLOBAL innodb_purge_rseg_truncate_frequency = 1;

--echo #
--echo # Bug#21869656 UNDO LOG DOES NOT CONTAIN ENOUGH INFORMATION
--echo # ON INDEXED VIRTUAL COLUMNS
--echo #

CREATE TABLE t1 (a INT, b INT,
 a1 INT GENERATED ALWAYS AS (a) VIRTUAL, INDEX(a1)
) ENGINE=InnoDB;

INSERT INTO t1 (a,b) VALUES(1,1);

connect (con1,localhost,root,,);
# disable purge
CREATE TABLE t0 (a INT) ENGINE=InnoDB;
BEGIN; SELECT * FROM t0;

connection default;
# write the problematic update_undo log record
UPDATE t1 SET a=0;

ALTER TABLE t1 DROP COLUMN a1, ALGORITHM=INPLACE;
ALTER TABLE t1 ADD COLUMN b1 INT GENERATED ALWAYS AS (b) VIRTUAL, ADD
INDEX(b1),
ALGORITHM=INPLACE;

connection con1;
# enable purge
COMMIT;
UPDATE t1 SET a=1;

connection default;
--source ../../innodb/include/wait_all_purged.inc

CHECK TABLE t1;
SELECT b1 FROM t1;


# Create multi-virtual column, more ADD/DROP to test it
ALTER TABLE t1
ADD COLUMN a1 INT GENERATED ALWAYS AS (a) VIRTUAL,
ADD COLUMN a2 INT GENERATED ALWAYS AS (a + b) VIRTUAL,
ADD COLUMN a3 INT GENERATED ALWAYS AS (a - b) VIRTUAL,
ADD COLUMN a4 INT GENERATED ALWAYS AS (a - b) VIRTUAL,
ADD INDEX(a1), ADD INDEX(a2), ADD INDEX(a3), ALGORITHM=INPLACE;

CREATE TABLE t2 (
  a BLOB,
  b BLOB,
  c BLOB GENERATED ALWAYS AS (CONCAT(a,b)) VIRTUAL,
  h VARCHAR(10) DEFAULT NULL
) ENGINE=InnoDB;

INSERT INTO t2 VALUES (REPEAT('g', 16000), REPEAT('x', 16000), DEFAULT, 'kk');

INSERT INTO t2 VALUES (REPEAT('a', 16000), REPEAT('b', 16000), DEFAULT, 'mm');

CREATE INDEX idx ON t2(c(100));

INSERT INTO t1 (a, b) VALUES(1,1);

connection con1;
# disable purge
BEGIN; SELECT * FROM t0;

connection default;
--enable_info

# write the problematic update_undo log record
UPDATE t1 SET a=0;
UPDATE t1 SET b=0;

ALTER TABLE t1 DROP COLUMN a3, ALGORITHM=INPLACE;

UPDATE t1 SET a=2;
ALTER TABLE t1 DROP COLUMN a2, ALGORITHM=INPLACE;
UPDATE t1 SET b=3;

ALTER TABLE t1 ADD COLUMN b2 INT GENERATED ALWAYS AS (b) VIRTUAL,
ADD INDEX(b2), ALGORITHM=INPLACE;
UPDATE t1 SET b=9;

ALTER TABLE t1 ADD COLUMN b3 INT GENERATED ALWAYS AS (a) VIRTUAL,
ADD INDEX(b3), ALGORITHM=INPLACE;

UPDATE t1 SET b=10;

ALTER TABLE t2 DROP COLUMN c;

UPDATE t2 SET a = REPEAT('s', 6000) WHERE a like 'aaa%';

ALTER TABLE t2 ADD COLUMN x1 BLOB GENERATED ALWAYS AS (CONCAT(a,b)) VIRTUAL,
ADD COLUMN x2 BLOB GENERATED ALWAYS AS (CONCAT(a,b)) VIRTUAL,
ADD INDEX(x1(100), x2(120)), ADD INDEX (x1(20));

UPDATE t1 SET a=5;

UPDATE t2 SET a = REPEAT('m', 16000) WHERE a like 'sss%';

ALTER TABLE t1 DROP COLUMN b2, ALGORITHM=INPLACE;

UPDATE t1 SET a=6;

ALTER TABLE t2 DROP COLUMN x1, DROP COLUMN x2, ALGORITHM=INPLACE;

UPDATE t2 SET a = REPEAT('x', 1000) WHERE a like 'mmm%';

ALTER TABLE t1 DROP INDEX b3;
UPDATE t1 SET a=100;
--disable_info

connection con1;
# enable purge
COMMIT;
disconnect con1;

connection default;
--source ../../innodb/include/wait_all_purged.inc

CHECK TABLE t1;
SELECT b1 FROM t1;

SELECT * FROM t1;
CHECK TABLE t2;
DROP TABLE t2, t1, t0;

CREATE TABLE t1 (a VARCHAR(30), b INT, a2 VARCHAR(30) GENERATED ALWAYS AS (a) VIRTUAL);

--error ER_DUP_FIELDNAME
CREATE INDEX idx ON t1(a2(10), b, a2(20));

DROP TABLE t1;

--source include/wait_until_count_sessions.inc
SET GLOBAL innodb_purge_rseg_truncate_frequency = @saved_frequency;