drop table if exists auto_random_tbl1;
create table auto_random_tbl1 (a bigint primary key auto_random(3), b varchar(255));
show create table `auto_random_tbl1`;
Table	Create Table
auto_random_tbl1	CREATE TABLE `auto_random_tbl1` (
  `a` bigint(20) NOT NULL /*T![auto_rand] AUTO_RANDOM(3) */,
  `b` varchar(255) DEFAULT NULL,
  PRIMARY KEY (`a`) /*T![clustered_index] CLUSTERED */
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin
drop table if exists auto_random_tbl2;
create table auto_random_tbl2 (a bigint auto_random primary key, b char);
show create table auto_random_tbl2;
Table	Create Table
auto_random_tbl2	CREATE TABLE `auto_random_tbl2` (
  `a` bigint(20) NOT NULL /*T![auto_rand] AUTO_RANDOM(5) */,
  `b` char(1) DEFAULT NULL,
  PRIMARY KEY (`a`) /*T![clustered_index] CLUSTERED */
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin
drop table if exists auto_random_tbl3;
create table auto_random_tbl3 (a bigint /*T![auto_rand] auto_random */ primary key);
show create table auto_random_tbl3;
Table	Create Table
auto_random_tbl3	CREATE TABLE `auto_random_tbl3` (
  `a` bigint(20) NOT NULL /*T![auto_rand] AUTO_RANDOM(5) */,
  PRIMARY KEY (`a`) /*T![clustered_index] CLUSTERED */
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin
drop table if exists auto_random_tbl4;
create table auto_random_tbl4 (a bigint primary key auto_random(5), b varchar(255)) auto_random_base = 100;
show create table `auto_random_tbl4`;
Table	Create Table
auto_random_tbl4	CREATE TABLE `auto_random_tbl4` (
  `a` bigint(20) NOT NULL /*T![auto_rand] AUTO_RANDOM(5) */,
  `b` varchar(255) DEFAULT NULL,
  PRIMARY KEY (`a`) /*T![clustered_index] CLUSTERED */
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin /*T![auto_rand_base] AUTO_RANDOM_BASE=100 */
drop table if exists auto_random_tbl5;
create table auto_random_tbl5 (a bigint auto_random primary key, b char) auto_random_base 50;
show create table auto_random_tbl5;
Table	Create Table
auto_random_tbl5	CREATE TABLE `auto_random_tbl5` (
  `a` bigint(20) NOT NULL /*T![auto_rand] AUTO_RANDOM(5) */,
  `b` char(1) DEFAULT NULL,
  PRIMARY KEY (`a`) /*T![clustered_index] CLUSTERED */
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin /*T![auto_rand_base] AUTO_RANDOM_BASE=50 */
drop table if exists auto_random_tbl6;
create table auto_random_tbl6 (a bigint /*T![auto_rand] auto_random */ primary key) auto_random_base 200;
show create table auto_random_tbl6;
Table	Create Table
auto_random_tbl6	CREATE TABLE `auto_random_tbl6` (
  `a` bigint(20) NOT NULL /*T![auto_rand] AUTO_RANDOM(5) */,
  PRIMARY KEY (`a`) /*T![clustered_index] CLUSTERED */
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin /*T![auto_rand_base] AUTO_RANDOM_BASE=200 */
drop table if exists auto_random_tbl7;
create table auto_random_tbl7 (a bigint primary key auto_random(4, 32), b varchar(255));
show create table auto_random_tbl7;
Table	Create Table
auto_random_tbl7	CREATE TABLE `auto_random_tbl7` (
  `a` bigint(20) NOT NULL /*T![auto_rand] AUTO_RANDOM(4, 32) */,
  `b` varchar(255) DEFAULT NULL,
  PRIMARY KEY (`a`) /*T![clustered_index] CLUSTERED */
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin
drop table if exists t;
create table t(a int auto_increment key) auto_id_cache = 10;
show create table t;
Table	Create Table
t	CREATE TABLE `t` (
  `a` int(11) NOT NULL AUTO_INCREMENT,
  PRIMARY KEY (`a`) /*T![clustered_index] CLUSTERED */
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin /*T![auto_id_cache] AUTO_ID_CACHE=10 */
drop table if exists t;
create table t(a int auto_increment unique, b int key) auto_id_cache 100;
show create table t;
Table	Create Table
t	CREATE TABLE `t` (
  `a` int(11) NOT NULL AUTO_INCREMENT,
  `b` int(11) NOT NULL,
  PRIMARY KEY (`b`) /*T![clustered_index] CLUSTERED */,
  UNIQUE KEY `a` (`a`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin /*T![auto_id_cache] AUTO_ID_CACHE=100 */
drop table if exists t;
create table t(a int key) auto_id_cache 5;
show create table t;
Table	Create Table
t	CREATE TABLE `t` (
  `a` int(11) NOT NULL,
  PRIMARY KEY (`a`) /*T![clustered_index] CLUSTERED */
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin /*T![auto_id_cache] AUTO_ID_CACHE=5 */
drop table if exists t2;
CREATE TABLE t2(a int primary key, b int unique, c int not null, unique index (c));
SHOW INDEX IN t2;
Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment	Visible	Expression	Clustered
t2	0	PRIMARY	1	a	A	0	NULL	NULL		BTREE			YES	NULL	YES
t2	0	c	1	c	A	0	NULL	NULL		BTREE			YES	NULL	NO
t2	0	b	1	b	A	0	NULL	NULL	YES	BTREE			YES	NULL	NO
CREATE INDEX t2_b_c_index ON t2 (b, c);
CREATE INDEX t2_c_b_index ON t2 (c, b);
SHOW INDEX IN t2;
Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment	Visible	Expression	Clustered
t2	0	PRIMARY	1	a	A	0	NULL	NULL		BTREE			YES	NULL	YES
t2	0	c	1	c	A	0	NULL	NULL		BTREE			YES	NULL	NO
t2	0	b	1	b	A	0	NULL	NULL	YES	BTREE			YES	NULL	NO
t2	1	t2_b_c_index	1	b	A	0	NULL	NULL	YES	BTREE			YES	NULL	NO
t2	1	t2_b_c_index	2	c	A	0	NULL	NULL		BTREE			YES	NULL	NO
t2	1	t2_c_b_index	1	c	A	0	NULL	NULL		BTREE			YES	NULL	NO
t2	1	t2_c_b_index	2	b	A	0	NULL	NULL	YES	BTREE			YES	NULL	NO
drop table if exists test1;
CREATE TABLE `test1` (`id` int(0) NOT NULL,`num` int(0) DEFAULT NULL) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_bin;
create or replace view test1_v as(select id,row_number() over (partition by num) from test1);
desc test1_v;
Field	Type	Null	Key	Default	Extra
id	int(0)	NO		NULL	
row_number() over (partition by num)	bigint(21)	YES		NULL	
drop table if exists t;
create table t(created_at datetime) ttl = `created_at` + INTERVAL 100 YEAR;
show create table t;
Table	Create Table
t	CREATE TABLE `t` (
  `created_at` datetime DEFAULT NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin /*T![ttl] TTL=`created_at` + INTERVAL 100 YEAR */ /*T![ttl] TTL_ENABLE='ON' */ /*T![ttl] TTL_JOB_INTERVAL='1h' */
drop table if exists t;
create table t(created_at datetime) ttl = `created_at` + INTERVAL 100 YEAR ttl_enable = 'OFF';
show create table t;
Table	Create Table
t	CREATE TABLE `t` (
  `created_at` datetime DEFAULT NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin /*T![ttl] TTL=`created_at` + INTERVAL 100 YEAR */ /*T![ttl] TTL_ENABLE='OFF' */ /*T![ttl] TTL_JOB_INTERVAL='1h' */
drop table if exists t;
create table t (created_at datetime) TTL = created_at + INTERVAL 3.14159 HOUR_MINUTE;
show create table t;
Table	Create Table
t	CREATE TABLE `t` (
  `created_at` datetime DEFAULT NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin /*T![ttl] TTL=`created_at` + INTERVAL 3.14159 HOUR_MINUTE */ /*T![ttl] TTL_ENABLE='ON' */ /*T![ttl] TTL_JOB_INTERVAL='1h' */
drop table if exists t;
create table t (created_at datetime) TTL = created_at + INTERVAL "15:20" HOUR_MINUTE;
show create table t;
Table	Create Table
t	CREATE TABLE `t` (
  `created_at` datetime DEFAULT NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin /*T![ttl] TTL=`created_at` + INTERVAL _utf8mb4'15:20' HOUR_MINUTE */ /*T![ttl] TTL_ENABLE='ON' */ /*T![ttl] TTL_JOB_INTERVAL='1h' */
drop table if exists t;
create table t (created_at datetime) TTL = created_at + INTERVAL 100 YEAR TTL_JOB_INTERVAL = '1d';
show create table t;
Table	Create Table
t	CREATE TABLE `t` (
  `created_at` datetime DEFAULT NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin /*T![ttl] TTL=`created_at` + INTERVAL 100 YEAR */ /*T![ttl] TTL_ENABLE='ON' */ /*T![ttl] TTL_JOB_INTERVAL='1d' */
show open tables;
Database	Table	In_use	Name_locked
show open tables in executor__show;
Database	Table	In_use	Name_locked
create or replace view v1 as select 1;
show create view v1;
View	Create View	character_set_client	collation_connection
v1	CREATE ALGORITHM=UNDEFINED DEFINER=`root`@`%` SQL SECURITY DEFINER VIEW `v1` (`1`) AS SELECT 1 AS `1`	utf8mb4	utf8mb4_general_ci
drop view v1;
drop database if exists test1;
drop database if exists test2;
drop table if exists t, t1;
create table t1(a int,b int);
drop view if exists v1;
create or replace definer=`root`@`127.0.0.1` view v1 as select * from t1;
show create table v1;
View	Create View	character_set_client	collation_connection
v1	CREATE ALGORITHM=UNDEFINED DEFINER=`root`@`127.0.0.1` SQL SECURITY DEFINER VIEW `v1` (`a`, `b`) AS SELECT `executor__show`.`t1`.`a` AS `a`,`executor__show`.`t1`.`b` AS `b` FROM `executor__show`.`t1`	utf8mb4	utf8mb4_general_ci
show create view v1;
View	Create View	character_set_client	collation_connection
v1	CREATE ALGORITHM=UNDEFINED DEFINER=`root`@`127.0.0.1` SQL SECURITY DEFINER VIEW `v1` (`a`, `b`) AS SELECT `executor__show`.`t1`.`a` AS `a`,`executor__show`.`t1`.`b` AS `b` FROM `executor__show`.`t1`	utf8mb4	utf8mb4_general_ci
drop view v1;
drop table t1;
drop view if exists v;
create or replace definer=`root`@`127.0.0.1` view v as select JSON_MERGE('{}', '{}') as col;
show create view v;
View	Create View	character_set_client	collation_connection
v	CREATE ALGORITHM=UNDEFINED DEFINER=`root`@`127.0.0.1` SQL SECURITY DEFINER VIEW `v` (`col`) AS SELECT JSON_MERGE(_UTF8MB4'{}', _UTF8MB4'{}') AS `col`	utf8mb4	utf8mb4_general_ci
drop view if exists v;
drop table if exists t1;
create table t1(a int,b int);
create or replace definer=`root`@`127.0.0.1` view v1 as select avg(a),t1.* from t1 group by a;
show create view v1;
View	Create View	character_set_client	collation_connection
v1	CREATE ALGORITHM=UNDEFINED DEFINER=`root`@`127.0.0.1` SQL SECURITY DEFINER VIEW `v1` (`avg(a)`, `a`, `b`) AS SELECT AVG(`a`) AS `avg(a)`,`executor__show`.`t1`.`a` AS `a`,`executor__show`.`t1`.`b` AS `b` FROM `executor__show`.`t1` GROUP BY `a`	utf8mb4	utf8mb4_general_ci
drop view v1;
create or replace definer=`root`@`127.0.0.1` view v1 as select a+b, t1.* , a as c from t1;
show create view v1;
View	Create View	character_set_client	collation_connection
v1	CREATE ALGORITHM=UNDEFINED DEFINER=`root`@`127.0.0.1` SQL SECURITY DEFINER VIEW `v1` (`a+b`, `a`, `b`, `c`) AS SELECT `a`+`b` AS `a+b`,`executor__show`.`t1`.`a` AS `a`,`executor__show`.`t1`.`b` AS `b`,`a` AS `c` FROM `executor__show`.`t1`	utf8mb4	utf8mb4_general_ci
drop table t1;
drop view v1;
create table t(c int, b int as (c + 1))ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin;
show create table `t`;
Table	Create Table
t	CREATE TABLE `t` (
  `c` int(11) DEFAULT NULL,
  `b` int(11) GENERATED ALWAYS AS (`c` + 1) VIRTUAL
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin
drop table t;
create table t(c int, b int as (c + 1) not null)ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin;
show create table `t`;
Table	Create Table
t	CREATE TABLE `t` (
  `c` int(11) DEFAULT NULL,
  `b` int(11) GENERATED ALWAYS AS (`c` + 1) VIRTUAL NOT NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin
drop table t;
create table t ( a char(10) charset utf8 collate utf8_bin, b char(10) as (rtrim(a)));
show create table `t`;
Table	Create Table
t	CREATE TABLE `t` (
  `a` char(10) CHARACTER SET utf8 COLLATE utf8_bin DEFAULT NULL,
  `b` char(10) GENERATED ALWAYS AS (rtrim(`a`)) VIRTUAL
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin
drop table t;
drop table if exists different_charset;
create table different_charset(ch1 varchar(10) charset utf8, ch2 varchar(10) charset binary);
show create table different_charset;
Table	Create Table
different_charset	CREATE TABLE `different_charset` (
  `ch1` varchar(10) CHARACTER SET utf8 COLLATE utf8_bin DEFAULT NULL,
  `ch2` varbinary(10) DEFAULT NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin
drop table if exists t;
create table `t` (
`a` timestamp not null default current_timestamp,
`b` timestamp(3) default current_timestamp(3),
`c` datetime default current_timestamp,
`d` datetime(4) default current_timestamp(4),
`e` varchar(20) default 'cUrrent_tImestamp',
`f` datetime(2) default current_timestamp(2) on update current_timestamp(2),
`g` timestamp(2) default current_timestamp(2) on update current_timestamp(2),
`h` date default current_date );
show create table `t`;
Table	Create Table
t	CREATE TABLE `t` (
  `a` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
  `b` timestamp(3) DEFAULT CURRENT_TIMESTAMP(3),
  `c` datetime DEFAULT CURRENT_TIMESTAMP,
  `d` datetime(4) DEFAULT CURRENT_TIMESTAMP(4),
  `e` varchar(20) DEFAULT 'cUrrent_tImestamp',
  `f` datetime(2) DEFAULT CURRENT_TIMESTAMP(2) ON UPDATE CURRENT_TIMESTAMP(2),
  `g` timestamp(2) DEFAULT CURRENT_TIMESTAMP(2) ON UPDATE CURRENT_TIMESTAMP(2),
  `h` date DEFAULT (CURRENT_DATE)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin
drop table t;
create table t (a int, b int) shard_row_id_bits = 4 pre_split_regions=3;
show create table `t`;
Table	Create Table
t	CREATE TABLE `t` (
  `a` int(11) DEFAULT NULL,
  `b` int(11) DEFAULT NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin /*T! SHARD_ROW_ID_BITS=4 PRE_SPLIT_REGIONS=3 */
drop table t;
drop table if exists t1;
create table t1(c int unsigned default 0);
show create table `t1`;
Table	Create Table
t1	CREATE TABLE `t1` (
  `c` int(10) unsigned DEFAULT '0'
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin
drop table t1;
CREATE TABLE `log` (`LOG_ID` bigint(20) UNSIGNED NOT NULL AUTO_INCREMENT,`ROUND_ID` bigint(20) UNSIGNED NOT NULL,`USER_ID` int(10) UNSIGNED NOT NULL,`USER_IP` int(10) UNSIGNED DEFAULT NULL,`END_TIME` datetime NOT NULL,`USER_TYPE` int(11) DEFAULT NULL,`APP_ID` int(11) DEFAULT NULL,PRIMARY KEY (`LOG_ID`,`END_TIME`) NONCLUSTERED,KEY `IDX_EndTime` (`END_TIME`),KEY `IDX_RoundId` (`ROUND_ID`),KEY `IDX_UserId_EndTime` (`USER_ID`,`END_TIME`)) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_bin AUTO_INCREMENT=505488 PARTITION BY RANGE ( month(`end_time`) ) (PARTITION `p1` VALUES LESS THAN (2),PARTITION `p2` VALUES LESS THAN (3),PARTITION `p3` VALUES LESS THAN (4),PARTITION `p4` VALUES LESS THAN (5),PARTITION `p5` VALUES LESS THAN (6),PARTITION `p6` VALUES LESS THAN (7),PARTITION `p7` VALUES LESS THAN (8),PARTITION `p8` VALUES LESS THAN (9),PARTITION `p9` VALUES LESS THAN (10),PARTITION `p10` VALUES LESS THAN (11),PARTITION `p11` VALUES LESS THAN (12),PARTITION `p12` VALUES LESS THAN (MAXVALUE));
show create table log;
Table	Create Table
log	CREATE TABLE `log` (
  `LOG_ID` bigint(20) unsigned NOT NULL AUTO_INCREMENT,
  `ROUND_ID` bigint(20) unsigned NOT NULL,
  `USER_ID` int(10) unsigned NOT NULL,
  `USER_IP` int(10) unsigned DEFAULT NULL,
  `END_TIME` datetime NOT NULL,
  `USER_TYPE` int(11) DEFAULT NULL,
  `APP_ID` int(11) DEFAULT NULL,
  PRIMARY KEY (`LOG_ID`,`END_TIME`) /*T![clustered_index] NONCLUSTERED */,
  KEY `IDX_EndTime` (`END_TIME`),
  KEY `IDX_RoundId` (`ROUND_ID`),
  KEY `IDX_UserId_EndTime` (`USER_ID`,`END_TIME`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_bin AUTO_INCREMENT=505488
PARTITION BY RANGE (MONTH(`end_time`))
(PARTITION `p1` VALUES LESS THAN (2),
 PARTITION `p2` VALUES LESS THAN (3),
 PARTITION `p3` VALUES LESS THAN (4),
 PARTITION `p4` VALUES LESS THAN (5),
 PARTITION `p5` VALUES LESS THAN (6),
 PARTITION `p6` VALUES LESS THAN (7),
 PARTITION `p7` VALUES LESS THAN (8),
 PARTITION `p8` VALUES LESS THAN (9),
 PARTITION `p9` VALUES LESS THAN (10),
 PARTITION `p10` VALUES LESS THAN (11),
 PARTITION `p11` VALUES LESS THAN (12),
 PARTITION `p12` VALUES LESS THAN (MAXVALUE))
create table ttt4(a varchar(123) default null collate utf8mb4_unicode_ci)engine=innodb default charset=utf8mb4 collate=utf8mb4_unicode_ci;
show create table `ttt4`;
Table	Create Table
ttt4	CREATE TABLE `ttt4` (
  `a` varchar(123) COLLATE utf8mb4_unicode_ci DEFAULT NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci
create table ttt5(a varchar(123) default null)engine=innodb default charset=utf8mb4 collate=utf8mb4_bin;
show create table `ttt5`;
Table	Create Table
ttt5	CREATE TABLE `ttt5` (
  `a` varchar(123) DEFAULT NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin
drop table if exists t;
create table t(a int, b real);
alter table t add index expr_idx((a*b+1));
show create table t;
Table	Create Table
t	CREATE TABLE `t` (
  `a` int(11) DEFAULT NULL,
  `b` double DEFAULT NULL,
  KEY `expr_idx` ((`a` * `b` + 1))
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin
drop sequence if exists seq;
create sequence seq;
show create table seq;
Sequence	Create Sequence
seq	CREATE SEQUENCE `seq` start with 1 minvalue 1 maxvalue 9223372036854775806 increment by 1 cache 1000 nocycle ENGINE=InnoDB
drop table if exists binary_collate;
create table binary_collate(a varchar(10)) default collate=binary;
show create table binary_collate;
Table	Create Table
binary_collate	CREATE TABLE `binary_collate` (
  `a` varbinary(10) DEFAULT NULL
) ENGINE=InnoDB DEFAULT CHARSET=binary
drop table if exists binary_collate;
create table binary_collate(a varchar(10)) default charset=binary collate=binary;
show create table binary_collate;
Table	Create Table
binary_collate	CREATE TABLE `binary_collate` (
  `a` varbinary(10) DEFAULT NULL
) ENGINE=InnoDB DEFAULT CHARSET=binary
drop table if exists binary_collate;
create table binary_collate(a varchar(10)) default charset=utf8mb4 collate=utf8mb4_bin;
show create table binary_collate;
Table	Create Table
binary_collate	CREATE TABLE `binary_collate` (
  `a` varchar(10) DEFAULT NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin
drop table if exists default_num;
create table default_num(a int default 11);
show create table default_num;
Table	Create Table
default_num	CREATE TABLE `default_num` (
  `a` int(11) DEFAULT '11'
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin
drop table if exists default_varchar;
create table default_varchar(a varchar(10) default "haha");
show create table default_varchar;
Table	Create Table
default_varchar	CREATE TABLE `default_varchar` (
  `a` varchar(10) DEFAULT 'haha'
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin
drop table if exists default_sequence;
create table default_sequence(a int default nextval(seq));
show create table default_sequence;
Table	Create Table
default_sequence	CREATE TABLE `default_sequence` (
  `a` int(11) DEFAULT (nextval(`executor__show`.`seq`))
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin
set @@foreign_key_checks=0;
DROP TABLE IF EXISTS parent, child;
CREATE TABLE child (id INT NOT NULL PRIMARY KEY auto_increment, parent_id INT NOT NULL, INDEX par_ind (parent_id), CONSTRAINT child_ibfk_1 FOREIGN KEY (parent_id) REFERENCES parent(id));
CREATE TABLE parent ( id INT NOT NULL PRIMARY KEY auto_increment );
show create table child;
Table	Create Table
child	CREATE TABLE `child` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `parent_id` int(11) NOT NULL,
  PRIMARY KEY (`id`) /*T![clustered_index] CLUSTERED */,
  KEY `par_ind` (`parent_id`),
  CONSTRAINT `child_ibfk_1` FOREIGN KEY (`parent_id`) REFERENCES `parent` (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin
DROP TABLE child;
CREATE TABLE child (id INT NOT NULL PRIMARY KEY auto_increment, parent_id INT NOT NULL, INDEX par_ind (parent_id), CONSTRAINT child_ibfk_1 FOREIGN KEY (parent_id) REFERENCES parent(id) ON DELETE RESTRICT ON UPDATE CASCADE);
show create table child;
Table	Create Table
child	CREATE TABLE `child` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `parent_id` int(11) NOT NULL,
  PRIMARY KEY (`id`) /*T![clustered_index] CLUSTERED */,
  KEY `par_ind` (`parent_id`),
  CONSTRAINT `child_ibfk_1` FOREIGN KEY (`parent_id`) REFERENCES `parent` (`id`) ON DELETE RESTRICT ON UPDATE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin
create database test1;
create database test2;
create table test1.t1 (id int key, b int, index(b));
create table test2.t2 (id int key, b int, foreign key fk(b) references test1.t1(id));
show create table test2.t2;
Table	Create Table
t2	CREATE TABLE `t2` (
  `id` int(11) NOT NULL,
  `b` int(11) DEFAULT NULL,
  PRIMARY KEY (`id`) /*T![clustered_index] CLUSTERED */,
  KEY `fk` (`b`),
  CONSTRAINT `fk` FOREIGN KEY (`b`) REFERENCES `test1`.`t1` (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin
drop database if exists test1;
drop database if exists test2;
drop table if exists t;
create table t(a int, b char(10) as ('a'));
show create table t;
Table	Create Table
t	CREATE TABLE `t` (
  `a` int(11) DEFAULT NULL,
  `b` char(10) GENERATED ALWAYS AS (_utf8mb4'a') VIRTUAL
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin
drop table if exists t;
create table t(a int, b char(10) as (_utf8'a'));
show create table t;
Table	Create Table
t	CREATE TABLE `t` (
  `a` int(11) DEFAULT NULL,
  `b` char(10) GENERATED ALWAYS AS (_utf8'a') VIRTUAL
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin
set @@session.tidb_enable_list_partition = ON;
DROP TABLE IF EXISTS t;
create table t (id int, name varchar(10), unique index idx (id)) partition by list  (id) (
partition p0 values in (3,5,6,9,17),
partition p1 values in (1,2,10,11,19,20),
partition p2 values in (4,12,13,14,18),
partition p3 values in (7,8,15,16,null)
);
show create table t;
Table	Create Table
t	CREATE TABLE `t` (
  `id` int(11) DEFAULT NULL,
  `name` varchar(10) DEFAULT NULL,
  UNIQUE KEY `idx` (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin
PARTITION BY LIST (`id`)
(PARTITION `p0` VALUES IN (3,5,6,9,17),
 PARTITION `p1` VALUES IN (1,2,10,11,19,20),
 PARTITION `p2` VALUES IN (4,12,13,14,18),
 PARTITION `p3` VALUES IN (7,8,15,16,NULL))
DROP TABLE IF EXISTS t;
create table t (id int, name varchar(10), unique index idx (id)) partition by list columns (id) (
partition p0 values in (3,5,6,9,17),
partition p1 values in (1,2,10,11,19,20),
partition p2 values in (4,12,13,14,18),
partition p3 values in (7,8,15,16,null)
);
show create table t;
Table	Create Table
t	CREATE TABLE `t` (
  `id` int(11) DEFAULT NULL,
  `name` varchar(10) DEFAULT NULL,
  UNIQUE KEY `idx` (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin
PARTITION BY LIST COLUMNS(`id`)
(PARTITION `p0` VALUES IN (3,5,6,9,17),
 PARTITION `p1` VALUES IN (1,2,10,11,19,20),
 PARTITION `p2` VALUES IN (4,12,13,14,18),
 PARTITION `p3` VALUES IN (7,8,15,16,NULL))
DROP TABLE IF EXISTS t;
create table t (id int, name varchar(10), unique index idx (id, name)) partition by list columns (id, name) (
partition p0 values in ((3, '1'), (5, '5')),
partition p1 values in ((1, '1')));
show create table t;
Table	Create Table
t	CREATE TABLE `t` (
  `id` int(11) DEFAULT NULL,
  `name` varchar(10) DEFAULT NULL,
  UNIQUE KEY `idx` (`id`,`name`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin
PARTITION BY LIST COLUMNS(`id`,`name`)
(PARTITION `p0` VALUES IN ((3,'1'),(5,'5')),
 PARTITION `p1` VALUES IN ((1,'1')))
DROP TABLE IF EXISTS t;
create table t (id int primary key, v varchar(255) not null, key idx_v (v) comment 'foo\'bar');
show create table t;
Table	Create Table
t	CREATE TABLE `t` (
  `id` int(11) NOT NULL,
  `v` varchar(255) NOT NULL,
  PRIMARY KEY (`id`) /*T![clustered_index] CLUSTERED */,
  KEY `idx_v` (`v`) COMMENT 'foo''bar'
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin
CREATE TABLE `thash` (
`id` bigint unsigned NOT NULL,
`data` varchar(255) DEFAULT NULL,
PRIMARY KEY (`id`)
)
PARTITION BY HASH (`id`)
(PARTITION pEven COMMENT = "Even ids",
PARTITION pOdd COMMENT = "Odd ids");
show create table `thash`;
Table	Create Table
thash	CREATE TABLE `thash` (
  `id` bigint(20) unsigned NOT NULL,
  `data` varchar(255) DEFAULT NULL,
  PRIMARY KEY (`id`) /*T![clustered_index] CLUSTERED */
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin
PARTITION BY HASH (`id`)
(PARTITION `pEven` COMMENT 'Even ids',
 PARTITION `pOdd` COMMENT 'Odd ids')
drop table if exists `thash`;
CREATE TABLE `thash` (
`id` bigint unsigned NOT NULL,
`data` varchar(255) DEFAULT NULL,
PRIMARY KEY (`id`)
)
PARTITION BY HASH (`id`);
show create table `thash`;
Table	Create Table
thash	CREATE TABLE `thash` (
  `id` bigint(20) unsigned NOT NULL,
  `data` varchar(255) DEFAULT NULL,
  PRIMARY KEY (`id`) /*T![clustered_index] CLUSTERED */
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin
PARTITION BY HASH (`id`) PARTITIONS 1
drop table if exists t;
create table t(a int primary key, b varchar(20) default '\\');
show create table t;
Table	Create Table
t	CREATE TABLE `t` (
  `a` int(11) NOT NULL,
  `b` varchar(20) DEFAULT '\\',
  PRIMARY KEY (`a`) /*T![clustered_index] CLUSTERED */
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin
drop table if exists t;
create table t(a set('a', 'b') charset binary,b enum('a', 'b') charset ascii);
show create table t;
Table	Create Table
t	CREATE TABLE `t` (
  `a` set('a','b') CHARACTER SET binary COLLATE binary DEFAULT NULL,
  `b` enum('a','b') CHARACTER SET ascii COLLATE ascii_bin DEFAULT NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin
drop table if exists t;
create table t(a bit default (rand()));
show create table t;
Table	Create Table
t	CREATE TABLE `t` (
  `a` bit(1) DEFAULT (rand())
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin
drop table if exists t;
create table t (a varchar(255) character set ascii) partition by range columns (a) (partition p values less than (0xff));
Error 1654 (HY000): Partition column values of incorrect type
create table t (a varchar(255) character set ascii) partition by range columns (a) (partition p values less than (0x7f));
show create table t;
Table	Create Table
t	CREATE TABLE `t` (
  `a` varchar(255) CHARACTER SET ascii COLLATE ascii_bin DEFAULT NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin
PARTITION BY RANGE COLUMNS(`a`)
(PARTITION `p` VALUES LESS THAN (0x7f))
set @@session.tidb_enable_list_partition = default;
set @@foreign_key_checks=default;
create table if not exists show_errors (a int);
create table show_errors (a int);
Error 1050 (42S01): Table 'executor__show.show_errors' already exists
show errors;
Level	Code	Message
Error	1050	Table 'executor__show.show_errors' already exists
select 1;
1
1
create invalid;
Error 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your TiDB version for the right syntax to use line 1 column 14 near "invalid;" 
show errors;
Level	Code	Message
Error	1064	You have an error in your SQL syntax; check the manual that corresponds to your TiDB version for the right syntax to use line 1 column 14 near "invalid;" 
show tables;
Error 1046 (3D000): No database selected
show tables;
Error 1046 (3D000): No database selected
admin show slow recent 3;
admin show slow top 3;
admin show slow top internal 3;
admin show slow top all 3;
drop table if exists v1;
drop view if exists v1;
drop sequence if exists seq1;
drop table if exists seq1;
create view v1 as select 1;
create temporary table v1 (a int);
show create table v1;
Table	Create Table
v1	CREATE TEMPORARY TABLE `v1` (
  `a` int(11) DEFAULT NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin
drop view v1;
show create view v1;
Error 1146 (42S02): Table 'executor__show.v1' doesn't exist
drop view if exists seq1;
create sequence seq1;
create temporary table seq1 (a int);
show create sequence seq1;
Table	Create Table
seq1	CREATE SEQUENCE `seq1` start with 1 minvalue 1 maxvalue 9223372036854775806 increment by 1 cache 1000 nocycle ENGINE=InnoDB
drop sequence seq1;
show create sequence seq1;
Error 1146 (42S02): Table 'executor__show.seq1' doesn't exist
show builtins;
Supported_builtin_functions
abs
acos
adddate
addtime
aes_decrypt
aes_encrypt
and
any_value
ascii
asin
atan
atan2
benchmark
bin
bin_to_uuid
bit_count
bit_length
bitand
bitneg
bitor
bitxor
case
ceil
ceiling
char_func
char_length
character_length
charset
coalesce
coercibility
collation
compress
concat
concat_ws
connection_id
conv
convert
convert_tz
cos
cot
crc32
curdate
current_date
current_resource_group
current_role
current_time
current_timestamp
current_user
curtime
database
date
date_add
date_format
date_sub
datediff
day
dayname
dayofmonth
dayofweek
dayofyear
decode
default_func
degrees
des_decrypt
des_encrypt
div
elt
encode
encrypt
eq
exp
export_set
extract
field
find_in_set
floor
format
format_bytes
format_nano_time
found_rows
from_base64
from_days
from_unixtime
ge
get_format
get_lock
getparam
greatest
grouping
gt
hex
hour
if
ifnull
ilike
in
inet6_aton
inet6_ntoa
inet_aton
inet_ntoa
insert_func
instr
intdiv
interval
is_free_lock
is_ipv4
is_ipv4_compat
is_ipv4_mapped
is_ipv6
is_used_lock
is_uuid
isfalse
isnull
istrue
json_array
json_array_append
json_array_insert
json_contains
json_contains_path
json_depth
json_extract
json_insert
json_keys
json_length
json_memberof
json_merge
json_merge_patch
json_merge_preserve
json_object
json_overlaps
json_pretty
json_quote
json_remove
json_replace
json_schema_valid
json_search
json_set
json_storage_free
json_storage_size
json_type
json_unquote
json_valid
last_day
last_insert_id
lastval
lcase
le
least
left
leftshift
length
like
ln
load_file
localtime
localtimestamp
locate
log
log10
log2
lower
lpad
lt
ltrim
make_set
makedate
maketime
master_pos_wait
md5
microsecond
mid
minus
minute
mod
month
monthname
mul
name_const
ne
nextval
not
now
nulleq
oct
octet_length
old_password
or
ord
password_func
period_add
period_diff
pi
plus
position
pow
power
quarter
quote
radians
rand
random_bytes
regexp
regexp_instr
regexp_like
regexp_replace
regexp_substr
release_all_locks
release_lock
repeat
replace
reverse
right
rightshift
round
row_count
rpad
rtrim
schema
sec_to_time
second
session_user
setval
setvar
sha
sha1
sha2
sign
sin
sleep
sm3
space
sqrt
str_to_date
strcmp
subdate
substr
substring
substring_index
subtime
sysdate
system_user
tan
tidb_bounded_staleness
tidb_current_tso
tidb_decode_binary_plan
tidb_decode_key
tidb_decode_plan
tidb_decode_sql_digests
tidb_encode_index_key
tidb_encode_record_key
tidb_encode_sql_digest
tidb_is_ddl_owner
tidb_mvcc_info
tidb_parse_tso
tidb_parse_tso_logical
tidb_row_checksum
tidb_shard
tidb_version
time
time_format
time_to_sec
timediff
timestamp
timestampadd
timestampdiff
to_base64
to_days
to_seconds
translate
trim
truncate
ucase
unaryminus
uncompress
uncompressed_length
unhex
unix_timestamp
upper
user
utc_date
utc_time
utc_timestamp
uuid
uuid_short
uuid_to_bin
validate_password_strength
vec_as_text
vec_cosine_distance
vec_dims
vec_from_text
vec_l1_distance
vec_l2_distance
vec_l2_norm
vec_negative_inner_product
version
vitess_hash
week
weekday
weekofyear
weight_string
xor
year
yearweek
SHOW INDEX FROM performance_schema.events_statements_summary_by_digest;
Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment	Visible	Expression	Clustered
events_statements_summary_by_digest	0	SCHEMA_NAME	1	SCHEMA_NAME	A	0	NULL	NULL	YES	BTREE			YES	NULL	NO
events_statements_summary_by_digest	0	SCHEMA_NAME	2	DIGEST	A	0	NULL	NULL	YES	BTREE			YES	NULL	NO
drop table if exists t1, t3, t4, t5, t6, t7;
create global temporary table t1 (id int) on commit delete rows;
create global temporary table t3 (i int primary key, j int) on commit delete rows;
show create table t1;
Table	Create Table
t1	CREATE GLOBAL TEMPORARY TABLE `t1` (
  `id` int(11) DEFAULT NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin ON COMMIT DELETE ROWS
show create table t3;
Table	Create Table
t3	CREATE GLOBAL TEMPORARY TABLE `t3` (
  `i` int(11) NOT NULL,
  `j` int(11) DEFAULT NULL,
  PRIMARY KEY (`i`) /*T![clustered_index] CLUSTERED */
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin ON COMMIT DELETE ROWS
CREATE GLOBAL TEMPORARY TABLE `t4` (
`i` int(11) NOT NULL,
`j` int(11) DEFAULT NULL,
PRIMARY KEY (`i`) /*T![clustered_index] CLUSTERED */
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin ON COMMIT DELETE ROWS;
CREATE GLOBAL TEMPORARY TABLE t5 (
id int(11) NOT NULL AUTO_INCREMENT,
b int(11) NOT NULL,
pad varbinary(255) DEFAULT NULL,
PRIMARY KEY (id),
KEY b (b)) ON COMMIT DELETE ROWS;
show create table t5;
Table	Create Table
t5	CREATE GLOBAL TEMPORARY TABLE `t5` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `b` int(11) NOT NULL,
  `pad` varbinary(255) DEFAULT NULL,
  PRIMARY KEY (`id`) /*T![clustered_index] CLUSTERED */,
  KEY `b` (`b`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin ON COMMIT DELETE ROWS
create temporary table t6 (i int primary key, j int);
show create table t6;
Table	Create Table
t6	CREATE TEMPORARY TABLE `t6` (
  `i` int(11) NOT NULL,
  `j` int(11) DEFAULT NULL,
  PRIMARY KEY (`i`) /*T![clustered_index] CLUSTERED */
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin
create temporary table t7 (i int primary key auto_increment, j int);
begin;
insert into t7 (j) values (14);
insert into t7 (j) values (24);
select * from t7;
i	j
1	14
2	24
show create table t7;
Table	Create Table
t7	CREATE TEMPORARY TABLE `t7` (
  `i` int(11) NOT NULL AUTO_INCREMENT,
  `j` int(11) DEFAULT NULL,
  PRIMARY KEY (`i`) /*T![clustered_index] CLUSTERED */
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin AUTO_INCREMENT=3
commit;
drop table if exists t1;
create table t1 (id int);
alter table t1 cache;
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `id` int(11) DEFAULT NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin /* CACHED ON */
select create_options from information_schema.tables where table_schema = 'executor__show' and table_name = 't1';
create_options
cached=on
alter table t1 nocache;
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `id` int(11) DEFAULT NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin
select create_options from information_schema.tables where table_schema = 'executor__show' and table_name = 't1';
create_options

DROP DATABASE IF EXISTS `TEST_$1`;
DROP DATABASE IF EXISTS `test_$2`;
CREATE DATABASE `TEST_$1`;
CREATE DATABASE `test_$2`;
SHOW DATABASES LIKE 'TEST_$%';
Database (TEST_$%)
TEST_$1
test_$2
SHOW DATABASES LIKE 'test_$%';
Database (test_$%)
TEST_$1
test_$2
SHOW COLLATION LIKE 'UTF8MB4_BI%';
Collation	Charset	Id	Default	Compiled	Sortlen	Pad_attribute
utf8mb4_bin	utf8mb4	46	Yes	Yes	1	PAD SPACE
SHOW COLLATION LIKE 'utf8mb4_bi%';
Collation	Charset	Id	Default	Compiled	Sortlen	Pad_attribute
utf8mb4_bin	utf8mb4	46	Yes	Yes	1	PAD SPACE
drop user if exists 'show';
drop database if exists AAAA;
drop database if exists BBBB;
create user 'show'@'%';
show databases;
Database
INFORMATION_SCHEMA
create database AAAA;
create database BBBB;
grant select on AAAA.* to 'show'@'%';
grant select on BBBB.* to 'show'@'%';
show databases;
Database
INFORMATION_SCHEMA
AAAA
BBBB
drop user 'show'@'%';
drop database AAAA;
drop database BBBB;
DROP table IF EXISTS `T1`;
CREATE table `T1` (a int);
SHOW table status LIKE 't1';
Name	Engine	Version	Row_format	Rows	Avg_row_length	Data_length	Max_data_length	Index_length	Data_free	Auto_increment	Create_time	Update_time	Check_time	Collation	Checksum	Create_options	Comment
T1	InnoDB	10	Compact	0	0	0	0	0	0	NULL	1	NULL	NULL	utf8mb4_bin			
DROP table IF EXISTS `Li_1`;
DROP table IF EXISTS `li_2`;
CREATE table `Li_1` (a int);
CREATE table `li_2` (a int);
SHOW table status LIKE 'li%';
Name	Engine	Version	Row_format	Rows	Avg_row_length	Data_length	Max_data_length	Index_length	Data_free	Auto_increment	Create_time	Update_time	Check_time	Collation	Checksum	Create_options	Comment
Li_1	InnoDB	10	Compact	0	0	0	0	0	0	NULL	1	NULL	NULL	utf8mb4_bin			
li_2	InnoDB	10	Compact	0	0	0	0	0	0	NULL	1	NULL	NULL	utf8mb4_bin			
SET GLOBAL authentication_ldap_sasl_bind_root_pwd = '';
show variables like 'authentication_ldap_sasl_bind_root_pwd';
Variable_name	Value
authentication_ldap_sasl_bind_root_pwd	
SELECT current_value FROM information_schema.variables_info WHERE VARIABLE_NAME LIKE 'authentication_ldap_sasl_bind_root_pwd';
current_value

SET GLOBAL authentication_ldap_sasl_bind_root_pwd = password;
show variables like 'authentication_ldap_sasl_bind_root_pwd';
Variable_name	Value
authentication_ldap_sasl_bind_root_pwd	******
SELECT current_value FROM information_schema.variables_info WHERE VARIABLE_NAME LIKE 'authentication_ldap_sasl_bind_root_pwd';
current_value
******
SET GLOBAL authentication_ldap_simple_bind_root_pwd = '';
show variables like 'authentication_ldap_simple_bind_root_pwd';
Variable_name	Value
authentication_ldap_simple_bind_root_pwd	
SELECT current_value FROM information_schema.variables_info WHERE VARIABLE_NAME LIKE 'authentication_ldap_simple_bind_root_pwd';
current_value

SET GLOBAL authentication_ldap_simple_bind_root_pwd = password;
show variables like 'authentication_ldap_simple_bind_root_pwd';
Variable_name	Value
authentication_ldap_simple_bind_root_pwd	******
SELECT current_value FROM information_schema.variables_info WHERE VARIABLE_NAME LIKE 'authentication_ldap_simple_bind_root_pwd';
current_value
******
SET GLOBAL authentication_ldap_simple_bind_root_pwd = default;
SET GLOBAL authentication_ldap_sasl_bind_root_pwd = default;
show collation;
Collation	Charset	Id	Default	Compiled	Sortlen	Pad_attribute
ascii_bin	ascii	65	Yes	Yes	1	PAD SPACE
binary	binary	63	Yes	Yes	1	NO PAD
gbk_bin	gbk	87		Yes	1	PAD SPACE
gbk_chinese_ci	gbk	28	Yes	Yes	1	PAD SPACE
latin1_bin	latin1	47	Yes	Yes	1	PAD SPACE
utf8_bin	utf8	83	Yes	Yes	1	PAD SPACE
utf8_general_ci	utf8	33		Yes	1	PAD SPACE
utf8_unicode_ci	utf8	192		Yes	8	PAD SPACE
utf8mb4_0900_ai_ci	utf8mb4	255		Yes	0	NO PAD
utf8mb4_0900_bin	utf8mb4	309		Yes	1	NO PAD
utf8mb4_bin	utf8mb4	46	Yes	Yes	1	PAD SPACE
utf8mb4_general_ci	utf8mb4	45		Yes	1	PAD SPACE
utf8mb4_unicode_ci	utf8mb4	224		Yes	8	PAD SPACE
select * from information_schema.COLLATIONS;
COLLATION_NAME	CHARACTER_SET_NAME	ID	IS_DEFAULT	IS_COMPILED	SORTLEN	PAD_ATTRIBUTE
ascii_bin	ascii	65	Yes	Yes	1	PAD SPACE
binary	binary	63	Yes	Yes	1	NO PAD
gbk_bin	gbk	87		Yes	1	PAD SPACE
gbk_chinese_ci	gbk	28	Yes	Yes	1	PAD SPACE
latin1_bin	latin1	47	Yes	Yes	1	PAD SPACE
utf8_bin	utf8	83	Yes	Yes	1	PAD SPACE
utf8_general_ci	utf8	33		Yes	1	PAD SPACE
utf8_unicode_ci	utf8	192		Yes	8	PAD SPACE
utf8mb4_0900_ai_ci	utf8mb4	255		Yes	0	NO PAD
utf8mb4_0900_bin	utf8mb4	309		Yes	1	NO PAD
utf8mb4_bin	utf8mb4	46	Yes	Yes	1	PAD SPACE
utf8mb4_general_ci	utf8mb4	45		Yes	1	PAD SPACE
utf8mb4_unicode_ci	utf8mb4	224		Yes	8	PAD SPACE
show character set like '%utf8mb4%';
Charset	Description	Default collation	Maxlen
utf8mb4	UTF-8 Unicode	utf8mb4_bin	4
select * from information_schema.COLLATIONS where IS_DEFAULT='Yes' and CHARACTER_SET_NAME='utf8mb4';
COLLATION_NAME	CHARACTER_SET_NAME	ID	IS_DEFAULT	IS_COMPILED	SORTLEN	PAD_ATTRIBUTE
utf8mb4_bin	utf8mb4	46	Yes	Yes	1	PAD SPACE
set @@session.default_collation_for_utf8mb4='utf8mb4_0900_ai_ci';
show variables like 'default_collation_for_utf8mb4';
Variable_name	Value
default_collation_for_utf8mb4	utf8mb4_0900_ai_ci
show collation;
Collation	Charset	Id	Default	Compiled	Sortlen	Pad_attribute
ascii_bin	ascii	65	Yes	Yes	1	PAD SPACE
binary	binary	63	Yes	Yes	1	NO PAD
gbk_bin	gbk	87		Yes	1	PAD SPACE
gbk_chinese_ci	gbk	28	Yes	Yes	1	PAD SPACE
latin1_bin	latin1	47	Yes	Yes	1	PAD SPACE
utf8_bin	utf8	83	Yes	Yes	1	PAD SPACE
utf8_general_ci	utf8	33		Yes	1	PAD SPACE
utf8_unicode_ci	utf8	192		Yes	8	PAD SPACE
utf8mb4_0900_ai_ci	utf8mb4	255	Yes	Yes	0	NO PAD
utf8mb4_0900_bin	utf8mb4	309		Yes	1	NO PAD
utf8mb4_bin	utf8mb4	46		Yes	1	PAD SPACE
utf8mb4_general_ci	utf8mb4	45		Yes	1	PAD SPACE
utf8mb4_unicode_ci	utf8mb4	224		Yes	8	PAD SPACE
select * from information_schema.COLLATIONS;
COLLATION_NAME	CHARACTER_SET_NAME	ID	IS_DEFAULT	IS_COMPILED	SORTLEN	PAD_ATTRIBUTE
ascii_bin	ascii	65	Yes	Yes	1	PAD SPACE
binary	binary	63	Yes	Yes	1	NO PAD
gbk_bin	gbk	87		Yes	1	PAD SPACE
gbk_chinese_ci	gbk	28	Yes	Yes	1	PAD SPACE
latin1_bin	latin1	47	Yes	Yes	1	PAD SPACE
utf8_bin	utf8	83	Yes	Yes	1	PAD SPACE
utf8_general_ci	utf8	33		Yes	1	PAD SPACE
utf8_unicode_ci	utf8	192		Yes	8	PAD SPACE
utf8mb4_0900_ai_ci	utf8mb4	255		Yes	0	NO PAD
utf8mb4_0900_bin	utf8mb4	309		Yes	1	NO PAD
utf8mb4_bin	utf8mb4	46	Yes	Yes	1	PAD SPACE
utf8mb4_general_ci	utf8mb4	45		Yes	1	PAD SPACE
utf8mb4_unicode_ci	utf8mb4	224		Yes	8	PAD SPACE
show character set like '%utf8mb4%';
Charset	Description	Default collation	Maxlen
utf8mb4	UTF-8 Unicode	utf8mb4_0900_ai_ci	4
select * from information_schema.COLLATIONS where IS_DEFAULT='Yes' and CHARACTER_SET_NAME='utf8mb4';
COLLATION_NAME	CHARACTER_SET_NAME	ID	IS_DEFAULT	IS_COMPILED	SORTLEN	PAD_ATTRIBUTE
utf8mb4_bin	utf8mb4	46	Yes	Yes	1	PAD SPACE
set @@session.default_collation_for_utf8mb4=default;
DROP TABLE IF EXISTS `t`;
CREATE TABLE `t` (a BIGINT PRIMARY KEY AUTO_RANDOM(2), b INT) PRE_SPLIT_REGIONS=4;
SHOW CREATE TABLE `t`;
Table	Create Table
t	CREATE TABLE `t` (
  `a` bigint(20) NOT NULL /*T![auto_rand] AUTO_RANDOM(2) */,
  `b` int(11) DEFAULT NULL,
  PRIMARY KEY (`a`) /*T![clustered_index] CLUSTERED */
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin /*T! PRE_SPLIT_REGIONS=2 */