INSTALL PLUGIN clone SONAME 'CLONE_PLUGIN';
SHOW VARIABLES LIKE 'clone_ddl_timeout';
Variable_name	Value
clone_ddl_timeout	300
# Disable backup lock
SET GLOBAL clone_ddl_timeout = 0;
SHOW VARIABLES LIKE 'clone_ddl_timeout';
Variable_name	Value
clone_ddl_timeout	0
# 1. CREATE TABLE while clone in progress
SET DEBUG_SYNC = 'clone_file_copy SIGNAL start_ddl WAIT_FOR resume_clone';
SET GLOBAL clone_autotune_concurrency = OFF;
SET GLOBAL clone_max_concurrency = 8;
CLONE LOCAL DATA DIRECTORY = 'CLONE_DATADIR';
SET DEBUG_SYNC = 'now WAIT_FOR start_ddl';
# 1A. TOO MANY CLONE IN PROGRESS
SET GLOBAL clone_autotune_concurrency = OFF;
SET GLOBAL clone_max_concurrency = 8;
CLONE LOCAL DATA DIRECTORY = 'CLONE_DATADIR';
ERROR HY000: Too many concurrent clone operations. Maximum allowed - 1.
select ID, STATE, ERROR_NO from performance_schema.clone_status;
ID	STATE	ERROR_NO
1	In Progress	0
select ID, STAGE, STATE from performance_schema.clone_progress;
ID	STAGE	STATE
1	DROP DATA	Completed
1	FILE COPY	In Progress
1	PAGE COPY	Not Started
1	REDO COPY	Not Started
1	FILE SYNC	Not Started
1	RESTART	Not Started
1	RECOVERY	Not Started
SET DEBUG_SYNC = 'clone_marked_abort SIGNAL resume_clone';
CREATE TABLE t1 (col1 INT PRIMARY KEY);
# In connection DEFAULT
ERROR HY000: Concurrent DDL is performed during clone operation. Please try again.
SET DEBUG_SYNC = 'RESET';
# In connection CON1
SET DEBUG_SYNC = 'RESET';
SHOW CREATE TABLE t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `col1` int(11) NOT NULL,
  PRIMARY KEY (`col1`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci
# 2. ALTER TABLE ADD COLUMN [COPY] while clone in progress
# In connection DEFAULT
INSERT INTO t1 values(10), (20), (30);
SELECT * FROM t1 ORDER BY col1;
col1
10
20
30
SET DEBUG_SYNC = 'clone_file_copy SIGNAL start_ddl WAIT_FOR resume_clone';
SET GLOBAL clone_autotune_concurrency = OFF;
SET GLOBAL clone_max_concurrency = 8;
CLONE LOCAL DATA DIRECTORY = 'CLONE_DATADIR';
SET DEBUG_SYNC = 'now WAIT_FOR start_ddl';
SET DEBUG_SYNC = 'clone_marked_abort SIGNAL resume_clone';
ALTER TABLE t1 ADD COLUMN col2 int, ALGORITHM=COPY;
# In connection DEFAULT
ERROR HY000: Concurrent DDL is performed during clone operation. Please try again.
SET DEBUG_SYNC = 'RESET';
# In connection CON1
SET DEBUG_SYNC = 'RESET';
SHOW CREATE TABLE t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `col1` int(11) NOT NULL,
  `col2` int(11) DEFAULT NULL,
  PRIMARY KEY (`col1`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci
SELECT * FROM t1 ORDER BY col1;
col1	col2
10	NULL
20	NULL
30	NULL
UPDATE t1 SET col2 = col1 + 1000;
# 2A. ALTER TABLE ADD COLUMN [INPLACE] while clone in progress
# In connection DEFAULT
SELECT * FROM t1 ORDER BY col1;
col1	col2
10	1010
20	1020
30	1030
SET DEBUG_SYNC = 'clone_redo_copy SIGNAL start_ddl WAIT_FOR resume_clone';
SET GLOBAL clone_autotune_concurrency = OFF;
SET GLOBAL clone_max_concurrency = 8;
CLONE LOCAL DATA DIRECTORY = 'CLONE_DATADIR';
SET DEBUG_SYNC = 'now WAIT_FOR start_ddl';
SET DEBUG_SYNC = 'clone_marked_abort SIGNAL resume_clone';
ALTER TABLE t1 ADD COLUMN col3 int, ALGORITHM=INPLACE;
# In connection DEFAULT
ERROR HY000: Concurrent DDL is performed during clone operation. Please try again.
SET DEBUG_SYNC = 'RESET';
# In connection CON1
SET DEBUG_SYNC = 'RESET';
SHOW CREATE TABLE t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `col1` int(11) NOT NULL,
  `col2` int(11) DEFAULT NULL,
  `col3` int(11) DEFAULT NULL,
  PRIMARY KEY (`col1`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci
SELECT * FROM t1 ORDER BY col1;
col1	col2	col3
10	1010	NULL
20	1020	NULL
30	1030	NULL
UPDATE t1 SET col3 = col2 + 1000;
# 3A. ADD INDEX [COPY] while clone in progress
# In connection DEFAULT
SELECT * FROM t1 ORDER BY col1;
col1	col2	col3
10	1010	2010
20	1020	2020
30	1030	2030
SET DEBUG_SYNC = 'clone_file_copy SIGNAL start_ddl WAIT_FOR resume_clone';
SET GLOBAL clone_autotune_concurrency = OFF;
SET GLOBAL clone_max_concurrency = 8;
CLONE LOCAL DATA DIRECTORY = 'CLONE_DATADIR';
SET DEBUG_SYNC = 'now WAIT_FOR start_ddl';
SET DEBUG_SYNC = 'clone_marked_abort SIGNAL resume_clone';
ALTER TABLE t1 ADD INDEX col2_idx(col2), ALGORITHM=COPY;
# In connection DEFAULT
ERROR HY000: Concurrent DDL is performed during clone operation. Please try again.
SET DEBUG_SYNC = 'RESET';
# In connection CON1
SET DEBUG_SYNC = 'RESET';
SHOW CREATE TABLE t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `col1` int(11) NOT NULL,
  `col2` int(11) DEFAULT NULL,
  `col3` int(11) DEFAULT NULL,
  PRIMARY KEY (`col1`),
  KEY `col2_idx` (`col2`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci
SELECT * FROM t1 ORDER BY col1;
col1	col2	col3
10	1010	2010
20	1020	2020
30	1030	2030
# 3B. ADD INDEX [INPLACE] while clone in progress
# In connection DEFAULT
SET DEBUG_SYNC = 'clone_file_copy SIGNAL start_ddl WAIT_FOR resume_clone';
SET GLOBAL clone_autotune_concurrency = OFF;
SET GLOBAL clone_max_concurrency = 8;
CLONE LOCAL DATA DIRECTORY = 'CLONE_DATADIR';
SET DEBUG_SYNC = 'now WAIT_FOR start_ddl';
SET DEBUG_SYNC = 'clone_marked_abort SIGNAL resume_clone';
ALTER TABLE t1 ADD INDEX col3_idx(col3), ALGORITHM=INPLACE;
# In connection DEFAULT
ERROR HY000: Concurrent DDL is performed during clone operation. Please try again.
SET DEBUG_SYNC = 'RESET';
# In connection CON1
SET DEBUG_SYNC = 'RESET';
SHOW CREATE TABLE t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `col1` int(11) NOT NULL,
  `col2` int(11) DEFAULT NULL,
  `col3` int(11) DEFAULT NULL,
  PRIMARY KEY (`col1`),
  KEY `col2_idx` (`col2`),
  KEY `col3_idx` (`col3`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci
SELECT * FROM t1 ORDER BY col1;
col1	col2	col3
10	1010	2010
20	1020	2020
30	1030	2030
# 4A. DROP INDEX [COPY] while clone in progress
# In connection DEFAULT
SET DEBUG_SYNC = 'clone_redo_copy SIGNAL start_ddl WAIT_FOR resume_clone';
SET GLOBAL clone_autotune_concurrency = OFF;
SET GLOBAL clone_max_concurrency = 8;
CLONE LOCAL DATA DIRECTORY = 'CLONE_DATADIR';
SET DEBUG_SYNC = 'now WAIT_FOR start_ddl';
SET DEBUG_SYNC = 'clone_marked_abort SIGNAL resume_clone';
ALTER TABLE t1 DROP INDEX col3_idx, ALGORITHM=COPY;
# In connection DEFAULT
ERROR HY000: Concurrent DDL is performed during clone operation. Please try again.
SET DEBUG_SYNC = 'RESET';
# In connection CON1
SET DEBUG_SYNC = 'RESET';
SHOW CREATE TABLE t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `col1` int(11) NOT NULL,
  `col2` int(11) DEFAULT NULL,
  `col3` int(11) DEFAULT NULL,
  PRIMARY KEY (`col1`),
  KEY `col2_idx` (`col2`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci
SELECT * FROM t1 ORDER BY col1;
col1	col2	col3
10	1010	2010
20	1020	2020
30	1030	2030
# 4B. DROP INDEX [INPLACE] while clone in progress
# In connection DEFAULT
SET DEBUG_SYNC = 'clone_file_copy SIGNAL start_ddl WAIT_FOR resume_clone';
SET GLOBAL clone_autotune_concurrency = OFF;
SET GLOBAL clone_max_concurrency = 8;
CLONE LOCAL DATA DIRECTORY = 'CLONE_DATADIR';
SET DEBUG_SYNC = 'now WAIT_FOR start_ddl';
SET DEBUG_SYNC = 'clone_marked_abort SIGNAL resume_clone';
ALTER TABLE t1 DROP INDEX col2_idx, ALGORITHM=INPLACE;
# In connection DEFAULT
ERROR HY000: Concurrent DDL is performed during clone operation. Please try again.
SET DEBUG_SYNC = 'RESET';
# In connection CON1
SET DEBUG_SYNC = 'RESET';
SHOW CREATE TABLE t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `col1` int(11) NOT NULL,
  `col2` int(11) DEFAULT NULL,
  `col3` int(11) DEFAULT NULL,
  PRIMARY KEY (`col1`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci
SELECT * FROM t1 ORDER BY col1;
col1	col2	col3
10	1010	2010
20	1020	2020
30	1030	2030
# 5. TRUNCATE TABLE while clone in progress
# In connection DEFAULT
SELECT * FROM t1 ORDER BY col1;
col1	col2	col3
10	1010	2010
20	1020	2020
30	1030	2030
SET DEBUG_SYNC = 'clone_file_copy SIGNAL start_ddl WAIT_FOR resume_clone';
SET GLOBAL clone_autotune_concurrency = OFF;
SET GLOBAL clone_max_concurrency = 8;
CLONE LOCAL DATA DIRECTORY = 'CLONE_DATADIR';
SET DEBUG_SYNC = 'now WAIT_FOR start_ddl';
SET DEBUG_SYNC = 'clone_marked_abort SIGNAL resume_clone';
TRUNCATE TABLE t1;
# In connection DEFAULT
ERROR HY000: Concurrent DDL is performed during clone operation. Please try again.
SET DEBUG_SYNC = 'RESET';
# In connection CON1
SET DEBUG_SYNC = 'RESET';
SHOW CREATE TABLE t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `col1` int(11) NOT NULL,
  `col2` int(11) DEFAULT NULL,
  `col3` int(11) DEFAULT NULL,
  PRIMARY KEY (`col1`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci
SELECT * FROM t1 ORDER BY col1;
col1	col2	col3
# 6. DROP TABLE while clone in progress
# In connection DEFAULT
INSERT INTO t1 values(10, 100, 1000);
SELECT * FROM t1 ORDER BY col1;
col1	col2	col3
10	100	1000
SET DEBUG_SYNC = 'clone_redo_copy SIGNAL start_ddl WAIT_FOR resume_clone';
SET GLOBAL clone_autotune_concurrency = OFF;
SET GLOBAL clone_max_concurrency = 8;
CLONE LOCAL DATA DIRECTORY = 'CLONE_DATADIR';
SET DEBUG_SYNC = 'now WAIT_FOR start_ddl';
SET DEBUG_SYNC = 'clone_marked_abort SIGNAL resume_clone';
DROP TABLE t1;
# In connection DEFAULT
ERROR HY000: Concurrent DDL is performed during clone operation. Please try again.
# In connection CON1
CREATE TABLE t1(col1 int);
# 7. KILL CLONE command while in progress
# In connection DEFAULT
INSERT INTO t1 values(10), (20), (30);
SELECT * FROM t1 ORDER BY col1;
col1
10
20
30
SET DEBUG_SYNC = 'clone_redo_copy SIGNAL start_kill WAIT_FOR resume_clone';
SET GLOBAL clone_autotune_concurrency = OFF;
SET GLOBAL clone_max_concurrency = 8;
CLONE LOCAL DATA DIRECTORY = 'CLONE_DATADIR';
SET DEBUG_SYNC = 'now WAIT_FOR start_kill';
KILL QUERY CON_ID;
SET DEBUG_SYNC= 'now SIGNAL resume_clone';
# In connection DEFAULT
ERROR 70100: Query execution was interrupted
#Cleanup
# In connection DEFAULT
SET DEBUG_SYNC = 'RESET';
DROP TABLE t1;
UNINSTALL PLUGIN clone;