SET @saved_parallel_read_threads = @@global.xengine_parallel_read_threads;
SET @saved_sort_buffer_size = @@global.xengine_sort_buffer_size;
SELECT @@global.xengine_parallel_read_threads;
@@global.xengine_parallel_read_threads
4
SELECT @@global.xengine_sort_buffer_size;
@@global.xengine_sort_buffer_size
4194304
SET xengine_parallel_read_threads=4;
SET global xengine_sort_buffer_size=64*1024;
Test interrupt during merge when build base
###################################################################
# case 1.1: check local merge interrupt
###################################################################
CREATE TABLE t1(a INT NOT NULL, b TEXT(10485760))ENGINE=XENGINE;
SHOW CREATE TABLE t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `a` int(11) NOT NULL,
  `b` longtext COLLATE utf8mb4_general_ci
) ENGINE=XENGINE DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_general_ci
SET SESSION DEBUG="+d,crash_during_local_merge";
SET DEBUG_SYNC= 'xengine.local_merge_interrupted SIGNAL interrupted';
ALTER TABLE t1 ADD PRIMARY KEY(a);
# Switch to connection dml
SET DEBUG_SYNC= 'now WAIT_FOR interrupted';
# Switch to connection default
ERROR HY000: Unknown error
SET SESSION debug="-d,crash_during_local_merge";
SHOW CREATE TABLE t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `a` int(11) NOT NULL,
  `b` longtext COLLATE utf8mb4_general_ci
) ENGINE=XENGINE DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_general_ci
CHECK TABLE t1;
Table	Op	Msg_type	Msg_text
test.t1	check	status	OK
DROP TABLE t1;
###################################################################
# case 1.2: check global merge interrupt
###################################################################
CREATE TABLE t1(a INT NOT NULL, b TEXT(10485760))ENGINE=XENGINE;
SHOW CREATE TABLE t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `a` int(11) NOT NULL,
  `b` longtext COLLATE utf8mb4_general_ci
) ENGINE=XENGINE DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_general_ci
SET SESSION DEBUG="+d,crash_during_global_merge";
SET DEBUG_SYNC= 'xengine.global_merge_interrupted SIGNAL interrupted';
ALTER TABLE t1 ADD PRIMARY KEY(a);
# Switch to connection dml
SET DEBUG_SYNC= 'now WAIT_FOR interrupted';
# Switch to connection default
ERROR HY000: Unknown error
SET SESSION debug="-d,crash_during_global_merge";
SHOW CREATE TABLE t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `a` int(11) NOT NULL,
  `b` longtext COLLATE utf8mb4_general_ci
) ENGINE=XENGINE DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_general_ci
CHECK TABLE t1;
Table	Op	Msg_type	Msg_text
test.t1	check	status	OK
DROP TABLE t1;
###################################################################
# case 2: dml unique check don't print err in child thread
###################################################################
CREATE TABLE t1(a INT NOT NULL, b TEXT(10485760))ENGINE=XENGINE;
SHOW CREATE TABLE t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `a` int(11) NOT NULL,
  `b` longtext COLLATE utf8mb4_general_ci
) ENGINE=XENGINE DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_general_ci
SET DEBUG_SYNC= 'xengine.build_base_global_merge_start SIGNAL start_dml WAIT_FOR dml_done';
ALTER TABLE t1 ADD PRIMARY KEY(a);
# Switch to connection dml
SET DEBUG_SYNC= 'now WAIT_FOR start_dml';
begin;
INSERT INTO t1 VALUES(1005, repeat('1', 128));
INSERT INTO t1 VALUES(1005, repeat('1', 128));
commit;
SET DEBUG_SYNC= 'now SIGNAL dml_done';
# Switch to connection default
ERROR 23000: Duplicate entry '1005' for key 'PRIMARY'
CHECK TABLE t1;
Table	Op	Msg_type	Msg_text
test.t1	check	status	OK
SHOW CREATE TABLE t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `a` int(11) NOT NULL,
  `b` longtext COLLATE utf8mb4_general_ci
) ENGINE=XENGINE DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_general_ci
failed to add primary key
DROP TABLE t1;
###################################################################
# case 3: test for thread from 1 to 64 for data size 1000
###################################################################
CREATE TABLE t1(a INT NOT NULL, b TEXT(10485760), PRIMARY KEY(a))ENGINE=XENGINE;
SHOW CREATE TABLE t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `a` int(11) NOT NULL,
  `b` longtext COLLATE utf8mb4_general_ci,
  PRIMARY KEY (`a`)
) ENGINE=XENGINE DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_general_ci
SET xengine_parallel_read_threads=1;
ALTER TABLE t1 DROP PRIMARY KEY;
ALTER TABLE t1 ADD PRIMARY KEY(a);
CHECK TABLE t1;
Table	Op	Msg_type	Msg_text
test.t1	check	status	OK
SET xengine_parallel_read_threads=2;
ALTER TABLE t1 DROP PRIMARY KEY;
ALTER TABLE t1 ADD PRIMARY KEY(a);
CHECK TABLE t1;
Table	Op	Msg_type	Msg_text
test.t1	check	status	OK
SET xengine_parallel_read_threads=4;
ALTER TABLE t1 DROP PRIMARY KEY;
ALTER TABLE t1 ADD PRIMARY KEY(a);
CHECK TABLE t1;
Table	Op	Msg_type	Msg_text
test.t1	check	status	OK
SET xengine_parallel_read_threads=8;
ALTER TABLE t1 DROP PRIMARY KEY;
ALTER TABLE t1 ADD PRIMARY KEY(a);
CHECK TABLE t1;
Table	Op	Msg_type	Msg_text
test.t1	check	status	OK
SET xengine_parallel_read_threads=16;
ALTER TABLE t1 DROP PRIMARY KEY;
ALTER TABLE t1 ADD PRIMARY KEY(a);
CHECK TABLE t1;
Table	Op	Msg_type	Msg_text
test.t1	check	status	OK
SET xengine_parallel_read_threads=32;
ALTER TABLE t1 DROP PRIMARY KEY;
ALTER TABLE t1 ADD PRIMARY KEY(a);
CHECK TABLE t1;
Table	Op	Msg_type	Msg_text
test.t1	check	status	OK
SET xengine_parallel_read_threads=64;
ALTER TABLE t1 DROP PRIMARY KEY;
ALTER TABLE t1 ADD PRIMARY KEY(a);
CHECK TABLE t1;
Table	Op	Msg_type	Msg_text
test.t1	check	status	OK
DROP TABLE t1;
###################################################################
# case 4: test for thread from 1 to 64 for data size 10
###################################################################
CREATE TABLE t1(a INT NOT NULL, b TEXT(10485760), PRIMARY KEY(a))ENGINE=XENGINE;
SHOW CREATE TABLE t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `a` int(11) NOT NULL,
  `b` longtext COLLATE utf8mb4_general_ci,
  PRIMARY KEY (`a`)
) ENGINE=XENGINE DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_general_ci
SET xengine_parallel_read_threads=1;
ALTER TABLE t1 DROP PRIMARY KEY;
ALTER TABLE t1 ADD PRIMARY KEY(a);
CHECK TABLE t1;
Table	Op	Msg_type	Msg_text
test.t1	check	status	OK
SET xengine_parallel_read_threads=2;
ALTER TABLE t1 DROP PRIMARY KEY;
ALTER TABLE t1 ADD PRIMARY KEY(a);
CHECK TABLE t1;
Table	Op	Msg_type	Msg_text
test.t1	check	status	OK
SET xengine_parallel_read_threads=4;
ALTER TABLE t1 DROP PRIMARY KEY;
ALTER TABLE t1 ADD PRIMARY KEY(a);
CHECK TABLE t1;
Table	Op	Msg_type	Msg_text
test.t1	check	status	OK
SET xengine_parallel_read_threads=8;
ALTER TABLE t1 DROP PRIMARY KEY;
ALTER TABLE t1 ADD PRIMARY KEY(a);
CHECK TABLE t1;
Table	Op	Msg_type	Msg_text
test.t1	check	status	OK
SET xengine_parallel_read_threads=16;
ALTER TABLE t1 DROP PRIMARY KEY;
ALTER TABLE t1 ADD PRIMARY KEY(a);
CHECK TABLE t1;
Table	Op	Msg_type	Msg_text
test.t1	check	status	OK
SET xengine_parallel_read_threads=32;
ALTER TABLE t1 DROP PRIMARY KEY;
ALTER TABLE t1 ADD PRIMARY KEY(a);
CHECK TABLE t1;
Table	Op	Msg_type	Msg_text
test.t1	check	status	OK
SET xengine_parallel_read_threads=64;
ALTER TABLE t1 DROP PRIMARY KEY;
ALTER TABLE t1 ADD PRIMARY KEY(a);
CHECK TABLE t1;
Table	Op	Msg_type	Msg_text
test.t1	check	status	OK
DROP TABLE t1;
###################################################################
# case 5: index is already sorted
###################################################################
CREATE TABLE t1(a INT NOT NULL, b TEXT(10485760), PRIMARY KEY(a))ENGINE=XENGINE;
SHOW CREATE TABLE t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `a` int(11) NOT NULL,
  `b` longtext COLLATE utf8mb4_general_ci,
  PRIMARY KEY (`a`)
) ENGINE=XENGINE DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_general_ci
SET xengine_parallel_read_threads=4;
ALTER TABLE t1 ADD INDEX a_1(a);
CHECK TABLE t1;
Table	Op	Msg_type	Msg_text
test.t1	check	status	OK
DROP TABLE t1;
SET @@global.xengine_parallel_read_threads=@saved_parallel_read_threads;
SET @@global.xengine_sort_buffer_size=@saved_sort_buffer_size;
SELECT @@global.xengine_parallel_read_threads;
@@global.xengine_parallel_read_threads
4
SELECT @@global.xengine_sort_buffer_size;
@@global.xengine_sort_buffer_size
4194304