diff --git a/mysql-test/suite/tianmu/r/ctas1.result b/mysql-test/suite/tianmu/r/ctas1.result
new file mode 100644
index 000000000..0f4c299a6
--- /dev/null
+++ b/mysql-test/suite/tianmu/r/ctas1.result
@@ -0,0 +1,137 @@
+#
+# Test CREATE TABLE AS SELECT
+#
+DROP DATABASE IF EXISTS ctas_test;
+CREATE DATABASE ctas_test;
+USE ctas_test;
+CREATE TABLE `user` (
+`id` bigint(20) NOT NULL AUTO_INCREMENT COMMENT 'id',
+`user_name` varchar(200) DEFAULT '',
+`phone` varchar(200) DEFAULT '',
+`b_code` varchar(255) DEFAULT NULL,
+PRIMARY KEY (`id`)
+)DEFAULT CHARSET=utf8;
+INSERT INTO `user`(`user_name`, `phone`, `b_code`) VALUES ('李明', '101', '2021001');
+INSERT INTO `user`(`user_name`, `phone`, `b_code`) VALUES ('赵慧', '456', '2020001');
+INSERT INTO `user`(`user_name`, `phone`, `b_code`) VALUES ('李凯', '123', '2021002');
+INSERT INTO `user`(`user_name`, `phone`, `b_code`) VALUES ('张三1', '123', '2022001');
+INSERT INTO `user`(`user_name`, `phone`, `b_code`) VALUES ('张三2', '123', '2021003');
+create table user1 as select * from user;
+select * from user1;
+id	user_name	phone	b_code
+1	李明	101	2021001
+2	赵慧	456	2020001
+3	李凯	123	2021002
+4	张三1	123	2022001
+5	张三2	123	2021003
+desc user1;
+Field	Type	Null	Key	Default	Extra
+id	bigint(20)	NO		0	
+user_name	varchar(200)	YES			
+phone	varchar(200)	YES			
+b_code	varchar(255)	YES		NULL	
+create table user2 as select user_name, phone from user;
+select * from user2;
+user_name	phone
+李明	101
+赵慧	456
+李凯	123
+张三1	123
+张三2	123
+create table user3 as select user_name, phone from user limit 2;
+select * from user3;
+user_name	phone
+李明	101
+赵慧	456
+create table user4 select user_name, phone from user limit 4;
+select * from user4;
+user_name	phone
+李明	101
+赵慧	456
+李凯	123
+张三1	123
+create table user5 as select * from user where b_code like '2021%';
+select * from user5;
+id	user_name	phone	b_code
+1	李明	101	2021001
+3	李凯	123	2021002
+5	张三2	123	2021003
+desc user5;
+Field	Type	Null	Key	Default	Extra
+id	bigint(20)	NO		0	
+user_name	varchar(200)	YES			
+phone	varchar(200)	YES			
+b_code	varchar(255)	YES		NULL	
+create table user6 like user;
+select * from user6;
+id	user_name	phone	b_code
+desc user6;
+Field	Type	Null	Key	Default	Extra
+id	bigint(20)	NO	PRI	NULL	auto_increment
+user_name	varchar(200)	YES			
+phone	varchar(200)	YES			
+b_code	varchar(255)	YES		NULL	
+create table user7 like user;
+insert into user7  select * from user;
+CREATE TABLE user_bk4( id INT NOT NULL) ENGINE=InnoDB SELECT id,user_name FROM user;
+select * from user_bk4;
+id	user_name
+1	李明
+2	赵慧
+3	李凯
+4	张三1
+5	张三2
+CREATE TABLE user_bk5( id INT NOT NULL primary key)ENGINE=TIANMU SELECT id,user_name FROM user;
+select * from user_bk5;
+id	user_name
+1	李明
+2	赵慧
+3	李凯
+4	张三1
+5	张三2
+create table user_bk6 select id+1 as id1 from user;
+select * from user_bk6;
+id1
+2
+3
+4
+5
+6
+desc user_bk6;
+Field	Type	Null	Key	Default	Extra
+id1	bigint(21)	NO		0	
+DROP TABLE IF EXISTS `test_tbl`;
+Warnings:
+Note	1051	Unknown table 'ctas_test.test_tbl'
+CREATE TABLE `test_tbl` (
+`test_id` int(11) NOT NULL AUTO_INCREMENT,
+`test_title` varchar(100) NOT NULL,
+`test_author` varchar(40) NOT NULL,
+`submission_date` date DEFAULT NULL,
+PRIMARY KEY (`test_id`)
+) DEFAULT CHARSET=utf8;
+INSERT INTO `test_tbl` 
+VALUES 
+('1', 'c++', 'test', '2017-04-12'), 
+('2', 'MySQL', 'test', '2017-04-12'), 
+('3', 'Java', 'test.COM', '2015-05-01'), 
+('4', 'Python', 'test.COM', '2016-03-06'), 
+('5', 'C', 'FK', '2017-04-05');
+DROP TABLE IF EXISTS `tcount_tbl`;
+Warnings:
+Note	1051	Unknown table 'ctas_test.tcount_tbl'
+CREATE TABLE `tcount_tbl` (
+`test_author` varchar(255) NOT NULL DEFAULT '',
+`test_count` int(11) NOT NULL DEFAULT '0'
+) DEFAULT CHARSET=utf8;
+INSERT INTO `tcount_tbl` 
+VALUES 
+('test','10'), 
+('test.COM','20'), 
+('Google', '22');
+create table test_tbl1 SELECT test_id, submission_date FROM test_tbl a left JOIN tcount_tbl b ON a.test_author = b.test_author;
+create table test_tbl2 SELECT a.test_id, a.test_author FROM test_tbl a right JOIN tcount_tbl b ON a.test_author = b.test_author;
+create table test_tbl3 SELECT a.test_id, a.test_author, b.test_count FROM test_tbl a INNER JOIN tcount_tbl b ON a.test_author = b.test_author;
+create table test_tbl4 as SELECT a.test_id, a.test_author, b.test_count FROM test_tbl a INNER JOIN tcount_tbl b ON a.test_author = b.test_author;
+create table test_tbl5 select * from test_tbl natural join tcount_tbl;
+drop database ctas_test;
diff --git a/mysql-test/suite/tianmu/r/different_charsets_b.result b/mysql-test/suite/tianmu/r/different_charsets_b.result
new file mode 100644
index 000000000..459fbd486
--- /dev/null
+++ b/mysql-test/suite/tianmu/r/different_charsets_b.result
@@ -0,0 +1,626 @@
+#
+# Test column length with different charsets 2
+#
+drop database if exists different_charsets_test;
+set character_set_client = utf8;
+set character_set_connection = utf8;
+set character_set_database = utf8mb4;
+set character_set_results = utf8;
+set character_set_server  = utf8mb4;
+create database different_charsets_test;
+use different_charsets_test;
+drop table if exists st1;
+drop table if exists st2;
+drop table if exists st3;
+drop table if exists i1;
+drop table if exists i2;
+create table st1 (a char(1) CHARACTER SET utf8 NOT NULL, b datetime NOT NULL,
+c char(10) CHARACTER SET utf8mb4 NOT NULL, d datetime NOT NULL,
+e char(240) CHARACTER SET utf8 NOT NULL, f datetime NOT NULL,
+g char(255) CHARACTER SET utf8mb4 NOT NULL, h datetime NOT NULL
+);
+create table st2 (a char(1) CHARACTER SET utf8, b datetime NOT NULL,
+c char(10) CHARACTER SET utf8mb4, d datetime NOT NULL,
+e char(240) CHARACTER SET utf8, f datetime NOT NULL,
+g char(255) CHARACTER SET utf8mb4, h datetime NOT NULL
+);
+create table i1 (a char(1) CHARACTER SET utf8 NOT NULL, b datetime NOT NULL,
+c char(10) CHARACTER SET utf8mb4 NOT NULL, d datetime NOT NULL,
+e char(240) CHARACTER SET utf8 NOT NULL, f datetime NOT NULL,
+g char(255) CHARACTER SET utf8mb4 NOT NULL, h datetime NOT NULL
+);
+create table i2 (a char(1) CHARACTER SET utf8, b datetime NOT NULL,
+c char(10) CHARACTER SET utf8mb4, d datetime NOT NULL,
+e char(240) CHARACTER SET utf8, f datetime NOT NULL,
+g char(255) CHARACTER SET utf8mb4, h datetime NOT NULL
+);
+insert into i1 values ('a', '2020-10-25 01:02:03',
+'bcd', '2020-10-25 01:02:04',
+'cde', '2020-10-25 01:02:05',
+'def', '2020-10-25 01:02:06'
+                      );
+insert into i2(b, d, f, h) values ('2020-10-25 01:02:03',
+'2020-10-25 01:02:04',
+'2020-10-25 01:02:05',
+'2020-10-25 01:02:06'
+                                  );
+insert into st1 select * from i1;
+insert into st2 select * from i2;
+select * from st1;
+a	b	c	d	e	f	g	h
+a	2020-10-25 01:02:03	bcd	2020-10-25 01:02:04	cde	2020-10-25 01:02:05	def	2020-10-25 01:02:06
+select * from st2;
+a	b	c	d	e	f	g	h
+NULL	2020-10-25 01:02:03	NULL	2020-10-25 01:02:04	NULL	2020-10-25 01:02:05	NULL	2020-10-25 01:02:06
+create table st3 like st1;
+insert into st3 values ('1', '2020-10-25 01:02:04',
+_utf8mb4 0xc2b9c2b2c2b3e281b4e281b5e281b6e281b7e281b8e281b9e281b0, '2020-10-25 01:02:05',
+'abc', '2020-10-25 01:02:06',
+'cde', '2020-10-25 01:02:07');
+insert into st3 values ('1', '2020-10-25 01:02:05',
+_utf8mb4 0xc2b9c2b2c2b3e281b4e281b5e281b6e281b7e281b8e281b9e281b0c2b9, '2020-10-25 01:02:06',
+'abc', '2020-10-25 01:02:07',
+'cde', '2020-10-25 01:02:08');
+ERROR 22001: Data too long for column 'c' at row 1
+insert ignore into st3 values ('12', '2020-10-25 01:02:06',
+_utf8mb4 0xc2b9c2b2c2b3e281b4e281b5e281b6e281b7e281b8e281b9e281b0c2b9, '2020-10-25 01:02:07',
+'abc', '2020-10-25 01:02:08',
+'cde', '2020-10-25 01:02:09');
+Warnings:
+Warning	1265	Data truncated for column 'a' at row 1
+Warning	1265	Data truncated for column 'c' at row 1
+insert into st3 values (_utf8mb4 0xF09F988E, '2020-10-25 01:02:07',
+'1234567890', '2020-10-25 01:02:08',
+'abc', '2020-10-25 01:02:09',
+'cde', '2020-10-25 01:02:10');
+ERROR HY000: Incorrect string value: '\xF0\x9F\x98\x8E' for column 'a' at row 1
+select * from st3;
+a	b	c	d	e	f	g	h
+1	2020-10-25 01:02:04	¹²³⁴⁵⁶⁷⁸⁹⁰	2020-10-25 01:02:05	abc	2020-10-25 01:02:06	cde	2020-10-25 01:02:07
+1	2020-10-25 01:02:06	¹²³⁴⁵⁶⁷⁸⁹⁰	2020-10-25 01:02:07	abc	2020-10-25 01:02:08	cde	2020-10-25 01:02:09
+select column_name, data_type, character_maximum_length, character_octet_length from information_schema.columns where table_schema='different_charsets_test' and table_name='st3';
+column_name	data_type	character_maximum_length	character_octet_length
+a	char	1	3
+b	datetime	NULL	NULL
+c	char	10	40
+d	datetime	NULL	NULL
+e	char	240	720
+f	datetime	NULL	NULL
+g	char	255	1020
+h	datetime	NULL	NULL
+drop table if exists st1;
+drop table if exists st2;
+drop table if exists st3;
+drop table if exists i1;
+drop table if exists i2;
+create table st1 (a char(1) NOT NULL, b datetime NOT NULL,
+c char(10) NOT NULL, d datetime NOT NULL,
+e char(240) NOT NULL, f datetime NOT NULL,
+g char(255) NOT NULL, h datetime NOT NULL
+) default character set utf8;
+create table st2 (a char(1), b datetime NOT NULL,
+c char(10), d datetime NOT NULL,
+e char(240), f datetime NOT NULL,
+g char(255), h datetime NOT NULL
+) default character set utf8;
+create table i1 (a char(1) NOT NULL, b datetime NOT NULL,
+c char(10) NOT NULL, d datetime NOT NULL,
+e char(240) NOT NULL, f datetime NOT NULL,
+g char(255) NOT NULL, h datetime NOT NULL
+) default character set utf8;
+create table i2 (a char(1), b datetime NOT NULL,
+c char(10), d datetime NOT NULL,
+e char(240), f datetime NOT NULL,
+g char(255), h datetime NOT NULL
+) default character set utf8;
+insert into i1 values ('a', '2020-10-25 01:02:03',
+'bcd', '2020-10-25 01:02:04',
+'cde', '2020-10-25 01:02:05',
+'def', '2020-10-25 01:02:06'
+                      );
+insert into i2(b, d, f, h) values ('2020-10-25 01:02:03',
+'2020-10-25 01:02:04',
+'2020-10-25 01:02:05',
+'2020-10-25 01:02:06'
+                                  );
+insert into st1 select * from i1;
+insert into st2 select * from i2;
+select * from st1;
+a	b	c	d	e	f	g	h
+a	2020-10-25 01:02:03	bcd	2020-10-25 01:02:04	cde	2020-10-25 01:02:05	def	2020-10-25 01:02:06
+select * from st2;
+a	b	c	d	e	f	g	h
+NULL	2020-10-25 01:02:03	NULL	2020-10-25 01:02:04	NULL	2020-10-25 01:02:05	NULL	2020-10-25 01:02:06
+create table st3 like st1;
+insert into st3 values ('1', '2020-10-25 01:02:04',
+_utf8mb4 0xc2b9c2b2c2b3e281b4e281b5e281b6e281b7e281b8e281b9e281b0, '2020-10-25 01:02:05',
+'abc', '2020-10-25 01:02:06',
+'cde', '2020-10-25 01:02:07');
+insert into st3 values ('1', '2020-10-25 01:02:05',
+_utf8mb4 0xc2b9c2b2c2b3e281b4e281b5e281b6e281b7e281b8e281b9e281b0c2b9, '2020-10-25 01:02:06',
+'abc', '2020-10-25 01:02:07',
+'cde', '2020-10-25 01:02:08');
+ERROR 22001: Data too long for column 'c' at row 1
+insert ignore into st3 values ('12', '2020-10-25 01:02:06',
+_utf8mb4 0xc2b9c2b2c2b3e281b4e281b5e281b6e281b7e281b8e281b9e281b0c2b9, '2020-10-25 01:02:07',
+'abc', '2020-10-25 01:02:08',
+'cde', '2020-10-25 01:02:09');
+Warnings:
+Warning	1265	Data truncated for column 'a' at row 1
+Warning	1265	Data truncated for column 'c' at row 1
+insert into st3 values (_utf8mb4 0xF09F988E, '2020-10-25 01:02:07',
+'1234567890', '2020-10-25 01:02:08',
+'abc', '2020-10-25 01:02:09',
+'cde', '2020-10-25 01:02:10');
+ERROR HY000: Incorrect string value: '\xF0\x9F\x98\x8E' for column 'a' at row 1
+select * from st3;
+a	b	c	d	e	f	g	h
+1	2020-10-25 01:02:04	¹²³⁴⁵⁶⁷⁸⁹⁰	2020-10-25 01:02:05	abc	2020-10-25 01:02:06	cde	2020-10-25 01:02:07
+1	2020-10-25 01:02:06	¹²³⁴⁵⁶⁷⁸⁹⁰	2020-10-25 01:02:07	abc	2020-10-25 01:02:08	cde	2020-10-25 01:02:09
+select column_name, data_type, character_maximum_length, character_octet_length from information_schema.columns where table_schema='different_charsets_test' and table_name='st3';
+column_name	data_type	character_maximum_length	character_octet_length
+a	char	1	3
+b	datetime	NULL	NULL
+c	char	10	30
+d	datetime	NULL	NULL
+e	char	240	720
+f	datetime	NULL	NULL
+g	char	255	765
+h	datetime	NULL	NULL
+drop table if exists st1;
+drop table if exists st2;
+drop table if exists st3;
+drop table if exists i1;
+drop table if exists i2;
+create table st1 (a char(1) NOT NULL, b datetime NOT NULL,
+c char(10) NOT NULL, d datetime NOT NULL,
+e char(240) NOT NULL, f datetime NOT NULL,
+g char(255) NOT NULL, h datetime NOT NULL
+) default character set utf8mb4;
+create table st2 (a char(1), b datetime NOT NULL,
+c char(10), d datetime NOT NULL,
+e char(240), f datetime NOT NULL,
+g char(255), h datetime NOT NULL
+) default character set utf8mb4;
+create table i1 (a char(1) NOT NULL, b datetime NOT NULL,
+c char(10) NOT NULL, d datetime NOT NULL,
+e char(240) NOT NULL, f datetime NOT NULL,
+g char(255) NOT NULL, h datetime NOT NULL
+) default character set utf8mb4;
+create table i2 (a char(1), b datetime NOT NULL,
+c char(10), d datetime NOT NULL,
+e char(240), f datetime NOT NULL,
+g char(255), h datetime NOT NULL
+) default character set utf8mb4;
+insert into i1 values ('a', '2020-10-25 01:02:03',
+'bcd', '2020-10-25 01:02:04',
+'cde', '2020-10-25 01:02:05',
+'def', '2020-10-25 01:02:06'
+                      );
+insert into i2(b, d, f, h) values ('2020-10-25 01:02:03',
+'2020-10-25 01:02:04',
+'2020-10-25 01:02:05',
+'2020-10-25 01:02:06'
+                                  );
+insert into st1 select * from i1;
+insert into st2 select * from i2;
+select * from st1;
+a	b	c	d	e	f	g	h
+a	2020-10-25 01:02:03	bcd	2020-10-25 01:02:04	cde	2020-10-25 01:02:05	def	2020-10-25 01:02:06
+select * from st2;
+a	b	c	d	e	f	g	h
+NULL	2020-10-25 01:02:03	NULL	2020-10-25 01:02:04	NULL	2020-10-25 01:02:05	NULL	2020-10-25 01:02:06
+create table st3 like st1;
+insert into st3 values ('1', '2020-10-25 01:02:04',
+_utf8mb4 0xc2b9c2b2c2b3e281b4e281b5e281b6e281b7e281b8e281b9e281b0, '2020-10-25 01:02:05',
+'abc', '2020-10-25 01:02:06',
+'cde', '2020-10-25 01:02:07');
+insert into st3 values ('1', '2020-10-25 01:02:05',
+_utf8mb4 0xc2b9c2b2c2b3e281b4e281b5e281b6e281b7e281b8e281b9e281b0c2b9, '2020-10-25 01:02:06',
+'abc', '2020-10-25 01:02:07',
+'cde', '2020-10-25 01:02:08');
+ERROR 22001: Data too long for column 'c' at row 1
+insert ignore into st3 values ('12', '2020-10-25 01:02:06',
+_utf8mb4 0xc2b9c2b2c2b3e281b4e281b5e281b6e281b7e281b8e281b9e281b0c2b9, '2020-10-25 01:02:07',
+'abc', '2020-10-25 01:02:08',
+'cde', '2020-10-25 01:02:09');
+Warnings:
+Warning	1265	Data truncated for column 'a' at row 1
+Warning	1265	Data truncated for column 'c' at row 1
+insert into st3 values (_utf8mb4 0xF09F988E, '2020-10-25 01:02:07',
+'1234567890', '2020-10-25 01:02:08',
+'abc', '2020-10-25 01:02:09',
+'cde', '2020-10-25 01:02:10');
+select * from st3;
+a	b	c	d	e	f	g	h
+1	2020-10-25 01:02:04	¹²³⁴⁵⁶⁷⁸⁹⁰	2020-10-25 01:02:05	abc	2020-10-25 01:02:06	cde	2020-10-25 01:02:07
+1	2020-10-25 01:02:06	¹²³⁴⁵⁶⁷⁸⁹⁰	2020-10-25 01:02:07	abc	2020-10-25 01:02:08	cde	2020-10-25 01:02:09
+?	2020-10-25 01:02:07	1234567890	2020-10-25 01:02:08	abc	2020-10-25 01:02:09	cde	2020-10-25 01:02:10
+select column_name, data_type, character_maximum_length, character_octet_length from information_schema.columns where table_schema='different_charsets_test' and table_name='st3';
+column_name	data_type	character_maximum_length	character_octet_length
+a	char	1	4
+b	datetime	NULL	NULL
+c	char	10	40
+d	datetime	NULL	NULL
+e	char	240	960
+f	datetime	NULL	NULL
+g	char	255	1020
+h	datetime	NULL	NULL
+drop table if exists st1;
+drop table if exists st2;
+drop table if exists st3;
+drop table if exists i1;
+drop table if exists i2;
+create table st1 (a text(8) NOT NULL, b datetime NOT NULL,
+c text(10) NOT NULL, d datetime NOT NULL,
+e text(255) NOT NULL, f datetime NOT NULL,
+g text NOT NULL, h datetime NOT NULL,
+i text(65535) NOT NULL, j datetime NOT NULL,
+k text(16777215) NOT NULL, l datetime NOT NULL
+);
+create table st2 (a text(8), b datetime NOT NULL,
+c text(10), d datetime NOT NULL,
+e text(255), f datetime NOT NULL,
+g text, h datetime NOT NULL,
+i text(65535), j datetime NOT NULL,
+k text(16777215), l datetime NOT NULL
+);
+create table i1  (a text(8) NOT NULL, b datetime NOT NULL,
+c text(10) NOT NULL, d datetime NOT NULL,
+e text(255) NOT NULL, f datetime NOT NULL,
+g text NOT NULL, h datetime NOT NULL,
+i text(65535) NOT NULL, j datetime NOT NULL,
+k text(16777215) NOT NULL, l datetime NOT NULL
+);
+create table i2  (a text(8), b datetime NOT NULL,
+c text(10), d datetime NOT NULL,
+e text(255), f datetime NOT NULL,
+g text, h datetime NOT NULL,
+i text(65535), j datetime NOT NULL,
+k text(16777215), l datetime NOT NULL
+);
+insert into i1 values ('a', '2020-10-25 01:02:03',
+'bcd', '2020-10-25 01:02:04',
+'cde', '2020-10-25 01:02:05',
+'def', '2020-10-25 01:02:06',
+'efg', '2020-10-25 01:02:07',
+'fgh', '2020-10-25 01:02:08'
+                      );
+insert into i2(b, d, f, h, j, l) values ('2020-10-25 01:02:03',
+'2020-10-25 01:02:04',
+'2020-10-25 01:02:05',
+'2020-10-25 01:02:06',
+'2020-10-25 01:02:07',
+'2020-10-25 01:02:08'
+                                        );
+insert into st1 select * from i1;
+insert into st2 select * from i2;
+select * from st1;
+a	b	c	d	e	f	g	h	i	j	k	l
+a	2020-10-25 01:02:03	bcd	2020-10-25 01:02:04	cde	2020-10-25 01:02:05	def	2020-10-25 01:02:06	efg	2020-10-25 01:02:07	fgh	2020-10-25 01:02:08
+select * from st2;
+a	b	c	d	e	f	g	h	i	j	k	l
+NULL	2020-10-25 01:02:03	NULL	2020-10-25 01:02:04	NULL	2020-10-25 01:02:05	NULL	2020-10-25 01:02:06	NULL	2020-10-25 01:02:07	NULL	2020-10-25 01:02:08
+create table st3 like st1;
+insert into st3 values ('1', '2020-10-25 01:02:04',
+'1234567890', '2020-10-25 01:02:05',
+'cde', '2020-10-25 01:02:07',
+'def', '2020-10-25 01:02:08',
+'efg', '2020-10-25 01:02:09',
+'fgh', '2020-10-25 01:02:10');
+insert into st3 values ('1', '2020-10-25 01:02:05',
+'12345678901', '2020-10-25 01:02:06',
+'cde', '2020-10-25 01:02:08',
+'def', '2020-10-25 01:02:09',
+'efg', '2020-10-25 01:02:10',
+'fgh', '2020-10-25 01:02:11');
+insert into st3 values (_utf8mb4 0xF09F988E, '2020-10-25 01:02:07',
+'1234567890', '2020-10-25 01:02:08',
+'cde', '2020-10-25 01:02:10',
+'def', '2020-10-25 01:02:11',
+'efg', '2020-10-25 01:02:12',
+'fgh', '2020-10-25 01:02:13');
+select * from st3;
+a	b	c	d	e	f	g	h	i	j	k	l
+1	2020-10-25 01:02:04	1234567890	2020-10-25 01:02:05	cde	2020-10-25 01:02:07	def	2020-10-25 01:02:08	efg	2020-10-25 01:02:09	fgh	2020-10-25 01:02:10
+1	2020-10-25 01:02:05	12345678901	2020-10-25 01:02:06	cde	2020-10-25 01:02:08	def	2020-10-25 01:02:09	efg	2020-10-25 01:02:10	fgh	2020-10-25 01:02:11
+?	2020-10-25 01:02:07	1234567890	2020-10-25 01:02:08	cde	2020-10-25 01:02:10	def	2020-10-25 01:02:11	efg	2020-10-25 01:02:12	fgh	2020-10-25 01:02:13
+select column_name, data_type, character_maximum_length, character_octet_length from information_schema.columns where table_schema='different_charsets_test' and table_name='st3';
+column_name	data_type	character_maximum_length	character_octet_length
+a	tinytext	255	255
+b	datetime	NULL	NULL
+c	tinytext	255	255
+d	datetime	NULL	NULL
+e	text	65535	65535
+f	datetime	NULL	NULL
+g	text	65535	65535
+h	datetime	NULL	NULL
+i	mediumtext	16777215	16777215
+j	datetime	NULL	NULL
+k	longtext	4294967295	4294967295
+l	datetime	NULL	NULL
+drop table if exists st1;
+drop table if exists st2;
+drop table if exists st3;
+drop table if exists i1;
+drop table if exists i2;
+create table st1 (a text(8) CHARACTER SET utf8 NOT NULL, b datetime NOT NULL,
+c text(10) CHARACTER SET utf8mb4 NOT NULL, d datetime NOT NULL,
+e text(255) CHARACTER SET utf8 NOT NULL, f datetime NOT NULL,
+g text CHARACTER SET utf8mb4 NOT NULL, h datetime NOT NULL,
+i text(65535) CHARACTER SET utf8 NOT NULL, j datetime NOT NULL,
+k text(16777215) CHARACTER SET utf8mb4 NOT NULL, l datetime NOT NULL
+);
+create table st2 (a text(8) CHARACTER SET utf8, b datetime NOT NULL,
+c text(10) CHARACTER SET utf8mb4, d datetime NOT NULL,
+e text(255) CHARACTER SET utf8, f datetime NOT NULL,
+g text CHARACTER SET utf8mb4, h datetime NOT NULL,
+i text(65535) CHARACTER SET utf8, j datetime NOT NULL,
+k text(16777215) CHARACTER SET utf8mb4, l datetime NOT NULL
+);
+create table i1  (a text(8) CHARACTER SET utf8 NOT NULL, b datetime NOT NULL,
+c text(10) CHARACTER SET utf8mb4 NOT NULL, d datetime NOT NULL,
+e text(255) CHARACTER SET utf8 NOT NULL, f datetime NOT NULL,
+g text CHARACTER SET utf8mb4 NOT NULL, h datetime NOT NULL,
+i text(65535) CHARACTER SET utf8 NOT NULL, j datetime NOT NULL,
+k text(16777215) CHARACTER SET utf8mb4 NOT NULL, l datetime NOT NULL
+);
+create table i2  (a text(8) CHARACTER SET utf8, b datetime NOT NULL,
+c text(10) CHARACTER SET utf8mb4, d datetime NOT NULL,
+e text(255) CHARACTER SET utf8, f datetime NOT NULL,
+g text CHARACTER SET utf8mb4, h datetime NOT NULL,
+i text(65535) CHARACTER SET utf8, j datetime NOT NULL,
+k text(16777215) CHARACTER SET utf8mb4, l datetime NOT NULL
+);
+insert into i1 values ('ab', '2020-10-25 01:02:03',
+'bcd', '2020-10-25 01:02:04',
+'cde', '2020-10-25 01:02:05',
+'def', '2020-10-25 01:02:06',
+'efg', '2020-10-25 01:02:07',
+'fgh', '2020-10-25 01:02:08'
+                      );
+insert into i2(b, d, f, h, j, l) values ('2020-10-25 01:02:03',
+'2020-10-25 01:02:04',
+'2020-10-25 01:02:05',
+'2020-10-25 01:02:06',
+'2020-10-25 01:02:07',
+'2020-10-25 01:02:08'
+                                        );
+insert into st1 select * from i1;
+insert into st2 select * from i2;
+select * from st1;
+a	b	c	d	e	f	g	h	i	j	k	l
+ab	2020-10-25 01:02:03	bcd	2020-10-25 01:02:04	cde	2020-10-25 01:02:05	def	2020-10-25 01:02:06	efg	2020-10-25 01:02:07	fgh	2020-10-25 01:02:08
+select * from st2;
+a	b	c	d	e	f	g	h	i	j	k	l
+NULL	2020-10-25 01:02:03	NULL	2020-10-25 01:02:04	NULL	2020-10-25 01:02:05	NULL	2020-10-25 01:02:06	NULL	2020-10-25 01:02:07	NULL	2020-10-25 01:02:08
+create table st3 like st1;
+insert into st3 values ('1', '2020-10-25 01:02:04',
+_utf8mb4 0xc2b9c2b2c2b3e281b4e281b5e281b6e281b7e281b8e281b9e281b0, '2020-10-25 01:02:05',
+'cde', '2020-10-25 01:02:07',
+'def', '2020-10-25 01:02:08',
+'efg', '2020-10-25 01:02:09',
+'fgh', '2020-10-25 01:02:10');
+insert into st3 values ('1', '2020-10-25 01:02:05',
+_utf8mb4 0xc2b9c2b2c2b3e281b4e281b5e281b6e281b7e281b8e281b9e281b0c2b9, '2020-10-25 01:02:06',
+'cde', '2020-10-25 01:02:08',
+'def', '2020-10-25 01:02:09',
+'efg', '2020-10-25 01:02:10',
+'fgh', '2020-10-25 01:02:11');
+insert into st3 values (_utf8mb4 0xF09F988E, '2020-10-25 01:02:07',
+'1234567890', '2020-10-25 01:02:08',
+'cde', '2020-10-25 01:02:10',
+'def', '2020-10-25 01:02:11',
+'efg', '2020-10-25 01:02:12',
+'fgh', '2020-10-25 01:02:13');
+ERROR HY000: Incorrect string value: '\xF0\x9F\x98\x8E' for column 'a' at row 1
+select * from st3;
+a	b	c	d	e	f	g	h	i	j	k	l
+1	2020-10-25 01:02:04	¹²³⁴⁵⁶⁷⁸⁹⁰	2020-10-25 01:02:05	cde	2020-10-25 01:02:07	def	2020-10-25 01:02:08	efg	2020-10-25 01:02:09	fgh	2020-10-25 01:02:10
+1	2020-10-25 01:02:05	¹²³⁴⁵⁶⁷⁸⁹⁰¹	2020-10-25 01:02:06	cde	2020-10-25 01:02:08	def	2020-10-25 01:02:09	efg	2020-10-25 01:02:10	fgh	2020-10-25 01:02:11
+select column_name, data_type, character_maximum_length, character_octet_length from information_schema.columns where table_schema='different_charsets_test' and table_name='st3';
+column_name	data_type	character_maximum_length	character_octet_length
+a	tinytext	255	255
+b	datetime	NULL	NULL
+c	tinytext	255	255
+d	datetime	NULL	NULL
+e	text	65535	65535
+f	datetime	NULL	NULL
+g	text	65535	65535
+h	datetime	NULL	NULL
+i	mediumtext	16777215	16777215
+j	datetime	NULL	NULL
+k	longtext	4294967295	4294967295
+l	datetime	NULL	NULL
+drop table if exists st1;
+drop table if exists st2;
+drop table if exists st3;
+drop table if exists i1;
+drop table if exists i2;
+create table st1 (a text(8) NOT NULL, b datetime NOT NULL,
+c text(10) NOT NULL, d datetime NOT NULL,
+e text(255) NOT NULL, f datetime NOT NULL,
+g text NOT NULL, h datetime NOT NULL,
+i text(65535) NOT NULL, j datetime NOT NULL,
+k text(16777215) NOT NULL, l datetime NOT NULL
+) default character set utf8;
+create table st2 (a text(8), b datetime NOT NULL,
+c text(10), d datetime NOT NULL,
+e text(255), f datetime NOT NULL,
+g text, h datetime NOT NULL,
+i text(65535), j datetime NOT NULL,
+k text(16777215), l datetime NOT NULL
+) default character set utf8;
+create table i1  (a text(8) NOT NULL, b datetime NOT NULL,
+c text(10) NOT NULL, d datetime NOT NULL,
+e text(255) NOT NULL, f datetime NOT NULL,
+g text NOT NULL, h datetime NOT NULL,
+i text(65535) NOT NULL, j datetime NOT NULL,
+k text(16777215) NOT NULL, l datetime NOT NULL
+) default character set utf8;
+create table i2  (a text(8), b datetime NOT NULL,
+c text(10), d datetime NOT NULL,
+e text(255), f datetime NOT NULL,
+g text, h datetime NOT NULL,
+i text(65535), j datetime NOT NULL,
+k text(16777215), l datetime NOT NULL
+) default character set utf8;
+insert into i1 values ('ab', '2020-10-25 01:02:03',
+'bcd', '2020-10-25 01:02:04',
+'cde', '2020-10-25 01:02:05',
+'def', '2020-10-25 01:02:06',
+'efg', '2020-10-25 01:02:07',
+'fgh', '2020-10-25 01:02:08'
+                      );
+insert into i2(b, d, f, h, j, l) values ('2020-10-25 01:02:03',
+'2020-10-25 01:02:04',
+'2020-10-25 01:02:05',
+'2020-10-25 01:02:06',
+'2020-10-25 01:02:07',
+'2020-10-25 01:02:08'
+                                        );
+insert into st1 select * from i1;
+insert into st2 select * from i2;
+select * from st1;
+a	b	c	d	e	f	g	h	i	j	k	l
+ab	2020-10-25 01:02:03	bcd	2020-10-25 01:02:04	cde	2020-10-25 01:02:05	def	2020-10-25 01:02:06	efg	2020-10-25 01:02:07	fgh	2020-10-25 01:02:08
+select * from st2;
+a	b	c	d	e	f	g	h	i	j	k	l
+NULL	2020-10-25 01:02:03	NULL	2020-10-25 01:02:04	NULL	2020-10-25 01:02:05	NULL	2020-10-25 01:02:06	NULL	2020-10-25 01:02:07	NULL	2020-10-25 01:02:08
+create table st3 like st1;
+insert into st3 values ('1', '2020-10-25 01:02:04',
+_utf8mb4 0xc2b9c2b2c2b3e281b4e281b5e281b6e281b7e281b8e281b9e281b0, '2020-10-25 01:02:05',
+'cde', '2020-10-25 01:02:07',
+'def', '2020-10-25 01:02:08',
+'efg', '2020-10-25 01:02:09',
+'fgh', '2020-10-25 01:02:10');
+insert into st3 values ('1', '2020-10-25 01:02:05',
+_utf8mb4 0xc2b9c2b2c2b3e281b4e281b5e281b6e281b7e281b8e281b9e281b0c2b9, '2020-10-25 01:02:06',
+'cde', '2020-10-25 01:02:08',
+'def', '2020-10-25 01:02:09',
+'efg', '2020-10-25 01:02:10',
+'fgh', '2020-10-25 01:02:11');
+insert into st3 values (_utf8mb4 0xF09F988E, '2020-10-25 01:02:07',
+'1234567890', '2020-10-25 01:02:08',
+'cde', '2020-10-25 01:02:10',
+'def', '2020-10-25 01:02:11',
+'efg', '2020-10-25 01:02:12',
+'fgh', '2020-10-25 01:02:13');
+ERROR HY000: Incorrect string value: '\xF0\x9F\x98\x8E' for column 'a' at row 1
+select * from st3;
+a	b	c	d	e	f	g	h	i	j	k	l
+1	2020-10-25 01:02:04	¹²³⁴⁵⁶⁷⁸⁹⁰	2020-10-25 01:02:05	cde	2020-10-25 01:02:07	def	2020-10-25 01:02:08	efg	2020-10-25 01:02:09	fgh	2020-10-25 01:02:10
+1	2020-10-25 01:02:05	¹²³⁴⁵⁶⁷⁸⁹⁰¹	2020-10-25 01:02:06	cde	2020-10-25 01:02:08	def	2020-10-25 01:02:09	efg	2020-10-25 01:02:10	fgh	2020-10-25 01:02:11
+select column_name, data_type, character_maximum_length, character_octet_length from information_schema.columns where table_schema='different_charsets_test' and table_name='st3';
+column_name	data_type	character_maximum_length	character_octet_length
+a	tinytext	255	255
+b	datetime	NULL	NULL
+c	tinytext	255	255
+d	datetime	NULL	NULL
+e	text	65535	65535
+f	datetime	NULL	NULL
+g	text	65535	65535
+h	datetime	NULL	NULL
+i	mediumtext	16777215	16777215
+j	datetime	NULL	NULL
+k	longtext	4294967295	4294967295
+l	datetime	NULL	NULL
+drop table if exists st1;
+drop table if exists st2;
+drop table if exists st3;
+drop table if exists i1;
+drop table if exists i2;
+create table st1 (a text(8) NOT NULL, b datetime NOT NULL,
+c text(10) NOT NULL, d datetime NOT NULL,
+e text(255) NOT NULL, f datetime NOT NULL,
+g text NOT NULL, h datetime NOT NULL,
+i text(65535) NOT NULL, j datetime NOT NULL,
+k text(16777215) NOT NULL, l datetime NOT NULL
+) default character set utf8mb4;
+create table st2 (a text(8), b datetime NOT NULL,
+c text(10), d datetime NOT NULL,
+e text(255), f datetime NOT NULL,
+g text, h datetime NOT NULL,
+i text(65535), j datetime NOT NULL,
+k text(16777215), l datetime NOT NULL
+) default character set utf8mb4;
+create table i1  (a text(8) NOT NULL, b datetime NOT NULL,
+c text(10) NOT NULL, d datetime NOT NULL,
+e text(255) NOT NULL, f datetime NOT NULL,
+g text NOT NULL, h datetime NOT NULL,
+i text(65535) NOT NULL, j datetime NOT NULL,
+k text(16777215) NOT NULL, l datetime NOT NULL
+) default character set utf8mb4;
+create table i2  (a text(8), b datetime NOT NULL,
+c text(10), d datetime NOT NULL,
+e text(255), f datetime NOT NULL,
+g text, h datetime NOT NULL,
+i text(65535), j datetime NOT NULL,
+k text(16777215), l datetime NOT NULL
+) default character set utf8mb4;
+insert into i1 values ('ab', '2020-10-25 01:02:03',
+'bcd', '2020-10-25 01:02:04',
+'cde', '2020-10-25 01:02:05',
+'def', '2020-10-25 01:02:06',
+'efg', '2020-10-25 01:02:07',
+'fgh', '2020-10-25 01:02:08'
+                      );
+insert into i2(b, d, f, h, j, l) values ('2020-10-25 01:02:03',
+'2020-10-25 01:02:04',
+'2020-10-25 01:02:05',
+'2020-10-25 01:02:06',
+'2020-10-25 01:02:07',
+'2020-10-25 01:02:08'
+                                        );
+insert into st1 select * from i1;
+insert into st2 select * from i2;
+select * from st1;
+a	b	c	d	e	f	g	h	i	j	k	l
+ab	2020-10-25 01:02:03	bcd	2020-10-25 01:02:04	cde	2020-10-25 01:02:05	def	2020-10-25 01:02:06	efg	2020-10-25 01:02:07	fgh	2020-10-25 01:02:08
+select * from st2;
+a	b	c	d	e	f	g	h	i	j	k	l
+NULL	2020-10-25 01:02:03	NULL	2020-10-25 01:02:04	NULL	2020-10-25 01:02:05	NULL	2020-10-25 01:02:06	NULL	2020-10-25 01:02:07	NULL	2020-10-25 01:02:08
+create table st3 like st1;
+insert into st3 values ('1', '2020-10-25 01:02:04',
+_utf8mb4 0xc2b9c2b2c2b3e281b4e281b5e281b6e281b7e281b8e281b9e281b0, '2020-10-25 01:02:05',
+'cde', '2020-10-25 01:02:07',
+'def', '2020-10-25 01:02:08',
+'efg', '2020-10-25 01:02:09',
+'fgh', '2020-10-25 01:02:10');
+insert into st3 values ('1', '2020-10-25 01:02:05',
+_utf8mb4 0xc2b9c2b2c2b3e281b4e281b5e281b6e281b7e281b8e281b9e281b0c2b9, '2020-10-25 01:02:06',
+'cde', '2020-10-25 01:02:08',
+'def', '2020-10-25 01:02:09',
+'efg', '2020-10-25 01:02:10',
+'fgh', '2020-10-25 01:02:11');
+insert into st3 values (_utf8mb4 0xF09F988E, '2020-10-25 01:02:07',
+'1234567890', '2020-10-25 01:02:08',
+'cde', '2020-10-25 01:02:10',
+'def', '2020-10-25 01:02:11',
+'efg', '2020-10-25 01:02:12',
+'fgh', '2020-10-25 01:02:13');
+select * from st3;
+a	b	c	d	e	f	g	h	i	j	k	l
+1	2020-10-25 01:02:04	¹²³⁴⁵⁶⁷⁸⁹⁰	2020-10-25 01:02:05	cde	2020-10-25 01:02:07	def	2020-10-25 01:02:08	efg	2020-10-25 01:02:09	fgh	2020-10-25 01:02:10
+1	2020-10-25 01:02:05	¹²³⁴⁵⁶⁷⁸⁹⁰¹	2020-10-25 01:02:06	cde	2020-10-25 01:02:08	def	2020-10-25 01:02:09	efg	2020-10-25 01:02:10	fgh	2020-10-25 01:02:11
+?	2020-10-25 01:02:07	1234567890	2020-10-25 01:02:08	cde	2020-10-25 01:02:10	def	2020-10-25 01:02:11	efg	2020-10-25 01:02:12	fgh	2020-10-25 01:02:13
+select column_name, data_type, character_maximum_length, character_octet_length from information_schema.columns where table_schema='different_charsets_test' and table_name='st3';
+column_name	data_type	character_maximum_length	character_octet_length
+a	tinytext	255	255
+b	datetime	NULL	NULL
+c	tinytext	255	255
+d	datetime	NULL	NULL
+e	text	65535	65535
+f	datetime	NULL	NULL
+g	text	65535	65535
+h	datetime	NULL	NULL
+i	mediumtext	16777215	16777215
+j	datetime	NULL	NULL
+k	longtext	4294967295	4294967295
+l	datetime	NULL	NULL
+drop table st1;
+drop table st2;
+drop table st3;
+drop table i1;
+drop table i2;
+drop database different_charsets_test;
diff --git a/mysql-test/suite/tianmu/r/insert_select.result b/mysql-test/suite/tianmu/r/insert_select.result
index 8b2bbf3ab..72ddd4774 100644
--- a/mysql-test/suite/tianmu/r/insert_select.result
+++ b/mysql-test/suite/tianmu/r/insert_select.result
@@ -4,32 +4,19 @@
 DROP DATABASE IF EXISTS insert_select_db;
 CREATE DATABASE insert_select_db;
 USE insert_select_db;
-drop table if exists t1,t2,t3;
 SET sql_mode = 'NO_ENGINE_SUBSTITUTION,NO_AUTO_CREATE_USER';
 create table t1 (bandID MEDIUMINT NOT NULL PRIMARY KEY, payoutID SMALLINT NOT NULL);
 insert into t1 (bandID,payoutID) VALUES (1,6),(2,6),(3,4),(4,9),(5,10),(6,1),(7,12),(8,12);
 create table t2 (payoutID SMALLINT NOT NULL PRIMARY KEY);
 insert into t2 (payoutID) SELECT DISTINCT payoutID FROM t1;
-insert into t2 (payoutID) SELECT payoutID+10 FROM t1;
-ERROR 23000: Duplicate entry '16' for key 'PRIMARY'
-insert ignore into t2 (payoutID) SELECT payoutID+10 FROM t1;
-Warnings:
-Warning	1062	Duplicate entry '16' for key 'PRIMARY'
-Warning	1062	Duplicate entry '22' for key 'PRIMARY'
-select * from t2;
+select * from t2 order by payoutID;
 payoutID
-6
+1
 4
+6
 9
 10
-1
 12
-16
-14
-19
-20
-11
-22
 drop table t1,t2;
 #
 # Test of insert ... select from same table
@@ -550,23 +537,6 @@ insert into t1(x,y) select x,z from t2 on duplicate key update x=values(t2.x);
 ERROR 42S22: Unknown column 't2.x' in 'field list'
 drop table t1,t2;
 #
-# INSERT INTO x SELECT .. FROM x LIMIT 1; slows down with big tables
-#
-CREATE TABLE t1 (a int PRIMARY KEY);
-INSERT INTO t1 values (1), (2);
-flush status;
-INSERT INTO t1 SELECT a + 2 FROM t1 LIMIT 1;
-show status like 'Handler_read%';
-Variable_name	Value
-Handler_read_first	0
-Handler_read_key	0
-Handler_read_last	0
-Handler_read_next	0
-Handler_read_prev	0
-Handler_read_rnd	0
-Handler_read_rnd_next	1
-DROP TABLE t1;
-#
 # INSERT INTO SELECT inserts values even if
 # SELECT statement itself returns empty
 #
@@ -615,10 +585,10 @@ use bug21774_1;
 INSERT INTO bug21774_2.t1 SELECT t1.* FROM t1;
 DROP DATABASE bug21774_1;
 DROP DATABASE bug21774_2;
-USE test;
 #
 # wrong result, when INSERT t1 SELECT ... FROM t1 ON DUPLICATE
 #
+use insert_select_db;
 CREATE TABLE t1 (f1 INT, f2 INT );
 CREATE TABLE t2  (f1 INT PRIMARY KEY, f2 INT);
 INSERT INTO t1 VALUES (1,1),(2,2),(10,10);
diff --git a/mysql-test/suite/tianmu/r/left_join.result b/mysql-test/suite/tianmu/r/left_join.result
index 53cd1ad7a..9f53c48df 100644
--- a/mysql-test/suite/tianmu/r/left_join.result
+++ b/mysql-test/suite/tianmu/r/left_join.result
@@ -110,6 +110,10 @@ select * from t1 left join t2 left join t3 on t2.a=t3.a on t1.a=t2.a where t3.a
 a	a	a
 3	3	3
 4	4	4
+select * from t1 left join t2 left join t3 on t2.a=t3.a on t1.a=t2.a where t3.a is null order by 1,2,3;
+a	a	a
+1	NULL	NULL
+2	2	NULL
 select * from t1 left join t2 on t1.a=t2.a left join t3 left join t4 on t3.a=t4.a on t1.a=t3.a order by 1,2,3,4;
 a	a	a	a
 1	NULL	NULL	NULL
@@ -135,6 +139,11 @@ a	a	a	a
 select * from t1 left join t2 on t1.a=t2.a left join t3 left join t4 on t3.a=t4.a on t1.a=t3.a where t4.a < 100 order by 1,2,3,4;
 a	a	a	a
 4	4	4	4
+select * from t1 left join t2 on t1.a=t2.a left join t3 left join t4 on t3.a=t4.a on t1.a=t3.a where t4.a is null order by 1,2,3,4;
+a	a	a	a
+1	NULL	NULL	NULL
+2	2	NULL	NULL
+3	3	3	NULL
 select * from t1 left join t2 on t1.a=t2.a left join t3 left join t4 on t3.a=t4.a on t1.a=t4.a order by 1,2,3,4;
 a	a	a	a
 1	NULL	NULL	NULL
@@ -190,6 +199,11 @@ a	a	a	a
 select * from t1 left join t2 on t1.a=t2.a left join t3 left join t4 on t3.a=t4.a on t2.a=t3.a where t4.a < 100 order by 1,2,3,4;
 a	a	a	a
 4	4	4	4
+select * from t1 left join t2 on t1.a=t2.a left join t3 left join t4 on t3.a=t4.a on t2.a=t3.a where t4.a is null order by 1,2,3,4;
+a	a	a	a
+1	NULL	NULL	NULL
+2	2	NULL	NULL
+3	3	3	NULL
 select * from t1 left join t2 on t1.a=t2.a left join t3 left join t4 on t3.a=t4.a on t2.a=t4.a order by 1,2,3,4;
 a	a	a	a
 1	NULL	NULL	NULL
diff --git a/mysql-test/suite/tianmu/t/ctas1.test b/mysql-test/suite/tianmu/t/ctas1.test
new file mode 100644
index 000000000..04cbdd68b
--- /dev/null
+++ b/mysql-test/suite/tianmu/t/ctas1.test
@@ -0,0 +1,100 @@
+--source include/have_tianmu.inc
+
+--echo #
+--echo # Test CREATE TABLE AS SELECT
+--echo #
+
+--disable_warnings
+DROP DATABASE IF EXISTS ctas_test;
+--enable_warnings
+
+CREATE DATABASE ctas_test;
+USE ctas_test;
+
+CREATE TABLE `user` (
+  `id` bigint(20) NOT NULL AUTO_INCREMENT COMMENT 'id',
+  `user_name` varchar(200) DEFAULT '',
+  `phone` varchar(200) DEFAULT '',
+  `b_code` varchar(255) DEFAULT NULL,
+  PRIMARY KEY (`id`)
+)DEFAULT CHARSET=utf8;
+
+INSERT INTO `user`(`user_name`, `phone`, `b_code`) VALUES ('李明', '101', '2021001');
+INSERT INTO `user`(`user_name`, `phone`, `b_code`) VALUES ('赵慧', '456', '2020001');
+INSERT INTO `user`(`user_name`, `phone`, `b_code`) VALUES ('李凯', '123', '2021002');
+INSERT INTO `user`(`user_name`, `phone`, `b_code`) VALUES ('张三1', '123', '2022001');
+INSERT INTO `user`(`user_name`, `phone`, `b_code`) VALUES ('张三2', '123', '2021003');
+
+create table user1 as select * from user;
+select * from user1;
+desc user1;
+
+create table user2 as select user_name, phone from user;
+select * from user2;
+
+create table user3 as select user_name, phone from user limit 2;
+select * from user3;
+
+create table user4 select user_name, phone from user limit 4;
+select * from user4;
+
+create table user5 as select * from user where b_code like '2021%';
+select * from user5;
+desc user5;
+
+create table user6 like user;
+select * from user6;
+desc user6;
+
+create table user7 like user;
+insert into user7  select * from user;
+
+CREATE TABLE user_bk4( id INT NOT NULL) ENGINE=InnoDB SELECT id,user_name FROM user;
+select * from user_bk4;
+
+CREATE TABLE user_bk5( id INT NOT NULL primary key)ENGINE=TIANMU SELECT id,user_name FROM user;
+select * from user_bk5;
+
+create table user_bk6 select id+1 as id1 from user;
+select * from user_bk6;
+desc user_bk6;
+
+# create table as select join
+DROP TABLE IF EXISTS `test_tbl`;
+CREATE TABLE `test_tbl` (
+  `test_id` int(11) NOT NULL AUTO_INCREMENT,
+  `test_title` varchar(100) NOT NULL,
+  `test_author` varchar(40) NOT NULL,
+  `submission_date` date DEFAULT NULL,
+  PRIMARY KEY (`test_id`)
+) DEFAULT CHARSET=utf8;
+
+INSERT INTO `test_tbl` 
+VALUES 
+('1', 'c++', 'test', '2017-04-12'), 
+('2', 'MySQL', 'test', '2017-04-12'), 
+('3', 'Java', 'test.COM', '2015-05-01'), 
+('4', 'Python', 'test.COM', '2016-03-06'), 
+('5', 'C', 'FK', '2017-04-05');
+
+
+DROP TABLE IF EXISTS `tcount_tbl`;
+CREATE TABLE `tcount_tbl` (
+  `test_author` varchar(255) NOT NULL DEFAULT '',
+  `test_count` int(11) NOT NULL DEFAULT '0'
+) DEFAULT CHARSET=utf8;
+
+INSERT INTO `tcount_tbl` 
+VALUES 
+('test','10'), 
+('test.COM','20'), 
+('Google', '22');
+
+create table test_tbl1 SELECT test_id, submission_date FROM test_tbl a left JOIN tcount_tbl b ON a.test_author = b.test_author;
+create table test_tbl2 SELECT a.test_id, a.test_author FROM test_tbl a right JOIN tcount_tbl b ON a.test_author = b.test_author;
+create table test_tbl3 SELECT a.test_id, a.test_author, b.test_count FROM test_tbl a INNER JOIN tcount_tbl b ON a.test_author = b.test_author;
+create table test_tbl4 as SELECT a.test_id, a.test_author, b.test_count FROM test_tbl a INNER JOIN tcount_tbl b ON a.test_author = b.test_author;
+create table test_tbl5 select * from test_tbl natural join tcount_tbl;
+
+# clean up
+drop database ctas_test;
diff --git a/mysql-test/suite/tianmu/t/different_charsets_b.test b/mysql-test/suite/tianmu/t/different_charsets_b.test
new file mode 100644
index 000000000..88d460206
--- /dev/null
+++ b/mysql-test/suite/tianmu/t/different_charsets_b.test
@@ -0,0 +1,538 @@
+--source include/have_tianmu.inc
+
+--echo #
+--echo # Test column length with different charsets 2
+--echo #
+
+-- disable_warnings
+drop database if exists different_charsets_test;
+set character_set_client = utf8;
+set character_set_connection = utf8;
+set character_set_database = utf8mb4;
+set character_set_results = utf8;
+set character_set_server  = utf8mb4;
+-- enable_warnings
+
+create database different_charsets_test;
+use different_charsets_test;
+
+# CHAR tests
+# With mix of utf8 and utf8mb4 character sets at the column level
+--disable_warnings
+drop table if exists st1;
+drop table if exists st2;
+drop table if exists st3;
+drop table if exists i1;
+drop table if exists i2;
+--enable_warnings
+create table st1 (a char(1) CHARACTER SET utf8 NOT NULL, b datetime NOT NULL,
+                  c char(10) CHARACTER SET utf8mb4 NOT NULL, d datetime NOT NULL,
+                  e char(240) CHARACTER SET utf8 NOT NULL, f datetime NOT NULL,
+                  g char(255) CHARACTER SET utf8mb4 NOT NULL, h datetime NOT NULL
+                 );
+create table st2 (a char(1) CHARACTER SET utf8, b datetime NOT NULL,
+                  c char(10) CHARACTER SET utf8mb4, d datetime NOT NULL,
+                  e char(240) CHARACTER SET utf8, f datetime NOT NULL,
+                  g char(255) CHARACTER SET utf8mb4, h datetime NOT NULL
+                 );
+create table i1 (a char(1) CHARACTER SET utf8 NOT NULL, b datetime NOT NULL,
+                 c char(10) CHARACTER SET utf8mb4 NOT NULL, d datetime NOT NULL,
+                 e char(240) CHARACTER SET utf8 NOT NULL, f datetime NOT NULL,
+                 g char(255) CHARACTER SET utf8mb4 NOT NULL, h datetime NOT NULL
+                );
+create table i2 (a char(1) CHARACTER SET utf8, b datetime NOT NULL,
+                 c char(10) CHARACTER SET utf8mb4, d datetime NOT NULL,
+                 e char(240) CHARACTER SET utf8, f datetime NOT NULL,
+                 g char(255) CHARACTER SET utf8mb4, h datetime NOT NULL
+                );
+insert into i1 values ('a', '2020-10-25 01:02:03',
+                       'bcd', '2020-10-25 01:02:04',
+                       'cde', '2020-10-25 01:02:05',
+                       'def', '2020-10-25 01:02:06'
+                      );
+insert into i2(b, d, f, h) values ('2020-10-25 01:02:03',
+                                   '2020-10-25 01:02:04',
+                                   '2020-10-25 01:02:05',
+                                   '2020-10-25 01:02:06'
+                                  );
+insert into st1 select * from i1;
+insert into st2 select * from i2;
+select * from st1;
+select * from st2;
+
+# test some corner cases: wrong encoding, truncating, internal structure
+create table st3 like st1;
+insert into st3 values ('1', '2020-10-25 01:02:04',
+                        _utf8mb4 0xc2b9c2b2c2b3e281b4e281b5e281b6e281b7e281b8e281b9e281b0, '2020-10-25 01:02:05',
+                        'abc', '2020-10-25 01:02:06',
+                        'cde', '2020-10-25 01:02:07');
+--error 1406
+insert into st3 values ('1', '2020-10-25 01:02:05',
+                        _utf8mb4 0xc2b9c2b2c2b3e281b4e281b5e281b6e281b7e281b8e281b9e281b0c2b9, '2020-10-25 01:02:06',
+                        'abc', '2020-10-25 01:02:07',
+                        'cde', '2020-10-25 01:02:08');
+insert ignore into st3 values ('12', '2020-10-25 01:02:06',
+                               _utf8mb4 0xc2b9c2b2c2b3e281b4e281b5e281b6e281b7e281b8e281b9e281b0c2b9, '2020-10-25 01:02:07',
+                               'abc', '2020-10-25 01:02:08',
+                               'cde', '2020-10-25 01:02:09');
+--error 1366
+insert into st3 values (_utf8mb4 0xF09F988E, '2020-10-25 01:02:07',
+                        '1234567890', '2020-10-25 01:02:08',
+                        'abc', '2020-10-25 01:02:09',
+                        'cde', '2020-10-25 01:02:10');
+select * from st3;
+select column_name, data_type, character_maximum_length, character_octet_length from information_schema.columns where table_schema='different_charsets_test' and table_name='st3';
+
+# With utf8 character set at the table level
+--disable_warnings
+drop table if exists st1;
+drop table if exists st2;
+drop table if exists st3;
+drop table if exists i1;
+drop table if exists i2;
+--enable_warnings
+create table st1 (a char(1) NOT NULL, b datetime NOT NULL,
+                  c char(10) NOT NULL, d datetime NOT NULL,
+                  e char(240) NOT NULL, f datetime NOT NULL,
+                  g char(255) NOT NULL, h datetime NOT NULL
+                 ) default character set utf8;
+create table st2 (a char(1), b datetime NOT NULL,
+                  c char(10), d datetime NOT NULL,
+                  e char(240), f datetime NOT NULL,
+                  g char(255), h datetime NOT NULL
+                 ) default character set utf8;
+create table i1 (a char(1) NOT NULL, b datetime NOT NULL,
+                 c char(10) NOT NULL, d datetime NOT NULL,
+                 e char(240) NOT NULL, f datetime NOT NULL,
+                 g char(255) NOT NULL, h datetime NOT NULL
+                ) default character set utf8;
+create table i2 (a char(1), b datetime NOT NULL,
+                 c char(10), d datetime NOT NULL,
+                 e char(240), f datetime NOT NULL,
+                 g char(255), h datetime NOT NULL
+                ) default character set utf8;
+insert into i1 values ('a', '2020-10-25 01:02:03',
+                       'bcd', '2020-10-25 01:02:04',
+                       'cde', '2020-10-25 01:02:05',
+                       'def', '2020-10-25 01:02:06'
+                      );
+insert into i2(b, d, f, h) values ('2020-10-25 01:02:03',
+                                   '2020-10-25 01:02:04',
+                                   '2020-10-25 01:02:05',
+                                   '2020-10-25 01:02:06'
+                                  );
+insert into st1 select * from i1;
+insert into st2 select * from i2;
+select * from st1;
+select * from st2;
+
+# test some corner cases: wrong encoding, truncating, internal structure
+create table st3 like st1;
+insert into st3 values ('1', '2020-10-25 01:02:04',
+                        _utf8mb4 0xc2b9c2b2c2b3e281b4e281b5e281b6e281b7e281b8e281b9e281b0, '2020-10-25 01:02:05',
+                        'abc', '2020-10-25 01:02:06',
+                        'cde', '2020-10-25 01:02:07');
+--error 1406
+insert into st3 values ('1', '2020-10-25 01:02:05',
+                        _utf8mb4 0xc2b9c2b2c2b3e281b4e281b5e281b6e281b7e281b8e281b9e281b0c2b9, '2020-10-25 01:02:06',
+                        'abc', '2020-10-25 01:02:07',
+                        'cde', '2020-10-25 01:02:08');
+insert ignore into st3 values ('12', '2020-10-25 01:02:06',
+                               _utf8mb4 0xc2b9c2b2c2b3e281b4e281b5e281b6e281b7e281b8e281b9e281b0c2b9, '2020-10-25 01:02:07',
+                               'abc', '2020-10-25 01:02:08',
+                               'cde', '2020-10-25 01:02:09');
+--error 1366
+insert into st3 values (_utf8mb4 0xF09F988E, '2020-10-25 01:02:07',
+                        '1234567890', '2020-10-25 01:02:08',
+                        'abc', '2020-10-25 01:02:09',
+                        'cde', '2020-10-25 01:02:10');
+select * from st3;
+select column_name, data_type, character_maximum_length, character_octet_length from information_schema.columns where table_schema='different_charsets_test' and table_name='st3';
+
+# With utf8mb4 character set at the table level
+--disable_warnings
+drop table if exists st1;
+drop table if exists st2;
+drop table if exists st3;
+drop table if exists i1;
+drop table if exists i2;
+--enable_warnings
+create table st1 (a char(1) NOT NULL, b datetime NOT NULL,
+                  c char(10) NOT NULL, d datetime NOT NULL,
+                  e char(240) NOT NULL, f datetime NOT NULL,
+                  g char(255) NOT NULL, h datetime NOT NULL
+                 ) default character set utf8mb4;
+create table st2 (a char(1), b datetime NOT NULL,
+                  c char(10), d datetime NOT NULL,
+                  e char(240), f datetime NOT NULL,
+                  g char(255), h datetime NOT NULL
+                 ) default character set utf8mb4;
+create table i1 (a char(1) NOT NULL, b datetime NOT NULL,
+                 c char(10) NOT NULL, d datetime NOT NULL,
+                 e char(240) NOT NULL, f datetime NOT NULL,
+                 g char(255) NOT NULL, h datetime NOT NULL
+                ) default character set utf8mb4;
+create table i2 (a char(1), b datetime NOT NULL,
+                 c char(10), d datetime NOT NULL,
+                 e char(240), f datetime NOT NULL,
+                 g char(255), h datetime NOT NULL
+                ) default character set utf8mb4;
+insert into i1 values ('a', '2020-10-25 01:02:03',
+                       'bcd', '2020-10-25 01:02:04',
+                       'cde', '2020-10-25 01:02:05',
+                       'def', '2020-10-25 01:02:06'
+                      );
+insert into i2(b, d, f, h) values ('2020-10-25 01:02:03',
+                                   '2020-10-25 01:02:04',
+                                   '2020-10-25 01:02:05',
+                                   '2020-10-25 01:02:06'
+                                  );
+insert into st1 select * from i1;
+insert into st2 select * from i2;
+select * from st1;
+select * from st2;
+
+# test some corner cases: wrong encoding, truncating, internal structure
+create table st3 like st1;
+insert into st3 values ('1', '2020-10-25 01:02:04',
+                        _utf8mb4 0xc2b9c2b2c2b3e281b4e281b5e281b6e281b7e281b8e281b9e281b0, '2020-10-25 01:02:05',
+                        'abc', '2020-10-25 01:02:06',
+                        'cde', '2020-10-25 01:02:07');
+--error 1406
+insert into st3 values ('1', '2020-10-25 01:02:05',
+                        _utf8mb4 0xc2b9c2b2c2b3e281b4e281b5e281b6e281b7e281b8e281b9e281b0c2b9, '2020-10-25 01:02:06',
+                        'abc', '2020-10-25 01:02:07',
+                        'cde', '2020-10-25 01:02:08');
+insert ignore into st3 values ('12', '2020-10-25 01:02:06',
+                               _utf8mb4 0xc2b9c2b2c2b3e281b4e281b5e281b6e281b7e281b8e281b9e281b0c2b9, '2020-10-25 01:02:07',
+                               'abc', '2020-10-25 01:02:08',
+                               'cde', '2020-10-25 01:02:09');
+insert into st3 values (_utf8mb4 0xF09F988E, '2020-10-25 01:02:07',
+                        '1234567890', '2020-10-25 01:02:08',
+                        'abc', '2020-10-25 01:02:09',
+                        'cde', '2020-10-25 01:02:10');
+select * from st3;
+select column_name, data_type, character_maximum_length, character_octet_length from information_schema.columns where table_schema='different_charsets_test' and table_name='st3';
+
+# TEXT tests
+# Without character set
+--disable_warnings
+drop table if exists st1;
+drop table if exists st2;
+drop table if exists st3;
+drop table if exists i1;
+drop table if exists i2;
+--enable_warnings
+create table st1 (a text(8) NOT NULL, b datetime NOT NULL,
+                  c text(10) NOT NULL, d datetime NOT NULL,
+                  e text(255) NOT NULL, f datetime NOT NULL,
+                  g text NOT NULL, h datetime NOT NULL,
+                  i text(65535) NOT NULL, j datetime NOT NULL,
+                  k text(16777215) NOT NULL, l datetime NOT NULL
+                 );
+create table st2 (a text(8), b datetime NOT NULL,
+                  c text(10), d datetime NOT NULL,
+                  e text(255), f datetime NOT NULL,
+                  g text, h datetime NOT NULL,
+                  i text(65535), j datetime NOT NULL,
+                  k text(16777215), l datetime NOT NULL
+                 );
+create table i1  (a text(8) NOT NULL, b datetime NOT NULL,
+                  c text(10) NOT NULL, d datetime NOT NULL,
+                  e text(255) NOT NULL, f datetime NOT NULL,
+                  g text NOT NULL, h datetime NOT NULL,
+                  i text(65535) NOT NULL, j datetime NOT NULL,
+                  k text(16777215) NOT NULL, l datetime NOT NULL
+                 );
+create table i2  (a text(8), b datetime NOT NULL,
+                  c text(10), d datetime NOT NULL,
+                  e text(255), f datetime NOT NULL,
+                  g text, h datetime NOT NULL,
+                  i text(65535), j datetime NOT NULL,
+                  k text(16777215), l datetime NOT NULL
+                 );
+insert into i1 values ('a', '2020-10-25 01:02:03',
+                       'bcd', '2020-10-25 01:02:04',
+                       'cde', '2020-10-25 01:02:05',
+                       'def', '2020-10-25 01:02:06',
+                       'efg', '2020-10-25 01:02:07',
+                       'fgh', '2020-10-25 01:02:08'
+                      );
+insert into i2(b, d, f, h, j, l) values ('2020-10-25 01:02:03',
+                                         '2020-10-25 01:02:04',
+                                         '2020-10-25 01:02:05',
+                                         '2020-10-25 01:02:06',
+                                         '2020-10-25 01:02:07',
+                                         '2020-10-25 01:02:08'
+                                        );
+insert into st1 select * from i1;
+insert into st2 select * from i2;
+select * from st1;
+select * from st2;
+
+# test some corner cases: wrong encoding, truncating, internal structure
+create table st3 like st1;
+insert into st3 values ('1', '2020-10-25 01:02:04',
+                        '1234567890', '2020-10-25 01:02:05',
+                        'cde', '2020-10-25 01:02:07',
+                        'def', '2020-10-25 01:02:08',
+                        'efg', '2020-10-25 01:02:09',
+                        'fgh', '2020-10-25 01:02:10');
+insert into st3 values ('1', '2020-10-25 01:02:05',
+                        '12345678901', '2020-10-25 01:02:06',
+                        'cde', '2020-10-25 01:02:08',
+                        'def', '2020-10-25 01:02:09',
+                        'efg', '2020-10-25 01:02:10',
+                        'fgh', '2020-10-25 01:02:11');
+insert into st3 values (_utf8mb4 0xF09F988E, '2020-10-25 01:02:07',
+                        '1234567890', '2020-10-25 01:02:08',
+                        'cde', '2020-10-25 01:02:10',
+                        'def', '2020-10-25 01:02:11',
+                        'efg', '2020-10-25 01:02:12',
+                        'fgh', '2020-10-25 01:02:13');
+select * from st3;
+select column_name, data_type, character_maximum_length, character_octet_length from information_schema.columns where table_schema='different_charsets_test' and table_name='st3';
+
+# With mix of utf8 and utf8mb4 character sets at the column level
+--disable_warnings
+drop table if exists st1;
+drop table if exists st2;
+drop table if exists st3;
+drop table if exists i1;
+drop table if exists i2;
+--enable_warnings
+create table st1 (a text(8) CHARACTER SET utf8 NOT NULL, b datetime NOT NULL,
+                  c text(10) CHARACTER SET utf8mb4 NOT NULL, d datetime NOT NULL,
+                  e text(255) CHARACTER SET utf8 NOT NULL, f datetime NOT NULL,
+                  g text CHARACTER SET utf8mb4 NOT NULL, h datetime NOT NULL,
+                  i text(65535) CHARACTER SET utf8 NOT NULL, j datetime NOT NULL,
+                  k text(16777215) CHARACTER SET utf8mb4 NOT NULL, l datetime NOT NULL
+                 );
+create table st2 (a text(8) CHARACTER SET utf8, b datetime NOT NULL,
+                  c text(10) CHARACTER SET utf8mb4, d datetime NOT NULL,
+                  e text(255) CHARACTER SET utf8, f datetime NOT NULL,
+                  g text CHARACTER SET utf8mb4, h datetime NOT NULL,
+                  i text(65535) CHARACTER SET utf8, j datetime NOT NULL,
+                  k text(16777215) CHARACTER SET utf8mb4, l datetime NOT NULL
+                 );
+create table i1  (a text(8) CHARACTER SET utf8 NOT NULL, b datetime NOT NULL,
+                  c text(10) CHARACTER SET utf8mb4 NOT NULL, d datetime NOT NULL,
+                  e text(255) CHARACTER SET utf8 NOT NULL, f datetime NOT NULL,
+                  g text CHARACTER SET utf8mb4 NOT NULL, h datetime NOT NULL,
+                  i text(65535) CHARACTER SET utf8 NOT NULL, j datetime NOT NULL,
+                  k text(16777215) CHARACTER SET utf8mb4 NOT NULL, l datetime NOT NULL
+                 );
+create table i2  (a text(8) CHARACTER SET utf8, b datetime NOT NULL,
+                  c text(10) CHARACTER SET utf8mb4, d datetime NOT NULL,
+                  e text(255) CHARACTER SET utf8, f datetime NOT NULL,
+                  g text CHARACTER SET utf8mb4, h datetime NOT NULL,
+                  i text(65535) CHARACTER SET utf8, j datetime NOT NULL,
+                  k text(16777215) CHARACTER SET utf8mb4, l datetime NOT NULL
+                 );
+insert into i1 values ('ab', '2020-10-25 01:02:03',
+                       'bcd', '2020-10-25 01:02:04',
+                       'cde', '2020-10-25 01:02:05',
+                       'def', '2020-10-25 01:02:06',
+                       'efg', '2020-10-25 01:02:07',
+                       'fgh', '2020-10-25 01:02:08'
+                      );
+insert into i2(b, d, f, h, j, l) values ('2020-10-25 01:02:03',
+                                         '2020-10-25 01:02:04',
+                                         '2020-10-25 01:02:05',
+                                         '2020-10-25 01:02:06',
+                                         '2020-10-25 01:02:07',
+                                         '2020-10-25 01:02:08'
+                                        );
+insert into st1 select * from i1;
+insert into st2 select * from i2;
+select * from st1;
+select * from st2;
+
+# test some corner cases: wrong encoding, truncating, internal structure
+create table st3 like st1;
+insert into st3 values ('1', '2020-10-25 01:02:04',
+                        _utf8mb4 0xc2b9c2b2c2b3e281b4e281b5e281b6e281b7e281b8e281b9e281b0, '2020-10-25 01:02:05',
+                        'cde', '2020-10-25 01:02:07',
+                        'def', '2020-10-25 01:02:08',
+                        'efg', '2020-10-25 01:02:09',
+                        'fgh', '2020-10-25 01:02:10');
+insert into st3 values ('1', '2020-10-25 01:02:05',
+                        _utf8mb4 0xc2b9c2b2c2b3e281b4e281b5e281b6e281b7e281b8e281b9e281b0c2b9, '2020-10-25 01:02:06',
+                        'cde', '2020-10-25 01:02:08',
+                        'def', '2020-10-25 01:02:09',
+                        'efg', '2020-10-25 01:02:10',
+                        'fgh', '2020-10-25 01:02:11');
+--error 1366
+insert into st3 values (_utf8mb4 0xF09F988E, '2020-10-25 01:02:07',
+                        '1234567890', '2020-10-25 01:02:08',
+                        'cde', '2020-10-25 01:02:10',
+                        'def', '2020-10-25 01:02:11',
+                        'efg', '2020-10-25 01:02:12',
+                        'fgh', '2020-10-25 01:02:13');
+select * from st3;
+select column_name, data_type, character_maximum_length, character_octet_length from information_schema.columns where table_schema='different_charsets_test' and table_name='st3';
+
+# With utf8 character set at the table level
+--disable_warnings
+drop table if exists st1;
+drop table if exists st2;
+drop table if exists st3;
+drop table if exists i1;
+drop table if exists i2;
+--enable_warnings
+create table st1 (a text(8) NOT NULL, b datetime NOT NULL,
+                  c text(10) NOT NULL, d datetime NOT NULL,
+                  e text(255) NOT NULL, f datetime NOT NULL,
+                  g text NOT NULL, h datetime NOT NULL,
+                  i text(65535) NOT NULL, j datetime NOT NULL,
+                  k text(16777215) NOT NULL, l datetime NOT NULL
+                 ) default character set utf8;
+create table st2 (a text(8), b datetime NOT NULL,
+                  c text(10), d datetime NOT NULL,
+                  e text(255), f datetime NOT NULL,
+                  g text, h datetime NOT NULL,
+                  i text(65535), j datetime NOT NULL,
+                  k text(16777215), l datetime NOT NULL
+                 ) default character set utf8;
+create table i1  (a text(8) NOT NULL, b datetime NOT NULL,
+                  c text(10) NOT NULL, d datetime NOT NULL,
+                  e text(255) NOT NULL, f datetime NOT NULL,
+                  g text NOT NULL, h datetime NOT NULL,
+                  i text(65535) NOT NULL, j datetime NOT NULL,
+                  k text(16777215) NOT NULL, l datetime NOT NULL
+                 ) default character set utf8;
+create table i2  (a text(8), b datetime NOT NULL,
+                  c text(10), d datetime NOT NULL,
+                  e text(255), f datetime NOT NULL,
+                  g text, h datetime NOT NULL,
+                  i text(65535), j datetime NOT NULL,
+                  k text(16777215), l datetime NOT NULL
+                 ) default character set utf8;
+insert into i1 values ('ab', '2020-10-25 01:02:03',
+                       'bcd', '2020-10-25 01:02:04',
+                       'cde', '2020-10-25 01:02:05',
+                       'def', '2020-10-25 01:02:06',
+                       'efg', '2020-10-25 01:02:07',
+                       'fgh', '2020-10-25 01:02:08'
+                      );
+insert into i2(b, d, f, h, j, l) values ('2020-10-25 01:02:03',
+                                         '2020-10-25 01:02:04',
+                                         '2020-10-25 01:02:05',
+                                         '2020-10-25 01:02:06',
+                                         '2020-10-25 01:02:07',
+                                         '2020-10-25 01:02:08'
+                                        );
+insert into st1 select * from i1;
+insert into st2 select * from i2;
+select * from st1;
+select * from st2;
+
+# test some corner cases: wrong encoding, truncating, internal structure
+create table st3 like st1;
+insert into st3 values ('1', '2020-10-25 01:02:04',
+                        _utf8mb4 0xc2b9c2b2c2b3e281b4e281b5e281b6e281b7e281b8e281b9e281b0, '2020-10-25 01:02:05',
+                        'cde', '2020-10-25 01:02:07',
+                        'def', '2020-10-25 01:02:08',
+                        'efg', '2020-10-25 01:02:09',
+                        'fgh', '2020-10-25 01:02:10');
+insert into st3 values ('1', '2020-10-25 01:02:05',
+                        _utf8mb4 0xc2b9c2b2c2b3e281b4e281b5e281b6e281b7e281b8e281b9e281b0c2b9, '2020-10-25 01:02:06',
+                        'cde', '2020-10-25 01:02:08',
+                        'def', '2020-10-25 01:02:09',
+                        'efg', '2020-10-25 01:02:10',
+                        'fgh', '2020-10-25 01:02:11');
+--error 1366
+insert into st3 values (_utf8mb4 0xF09F988E, '2020-10-25 01:02:07',
+                        '1234567890', '2020-10-25 01:02:08',
+                        'cde', '2020-10-25 01:02:10',
+                        'def', '2020-10-25 01:02:11',
+                        'efg', '2020-10-25 01:02:12',
+                        'fgh', '2020-10-25 01:02:13');
+select * from st3;
+select column_name, data_type, character_maximum_length, character_octet_length from information_schema.columns where table_schema='different_charsets_test' and table_name='st3';
+
+# With utf8mb4 character set at the table level
+--disable_warnings
+drop table if exists st1;
+drop table if exists st2;
+drop table if exists st3;
+drop table if exists i1;
+drop table if exists i2;
+--enable_warnings
+create table st1 (a text(8) NOT NULL, b datetime NOT NULL,
+                  c text(10) NOT NULL, d datetime NOT NULL,
+                  e text(255) NOT NULL, f datetime NOT NULL,
+                  g text NOT NULL, h datetime NOT NULL,
+                  i text(65535) NOT NULL, j datetime NOT NULL,
+                  k text(16777215) NOT NULL, l datetime NOT NULL
+                 ) default character set utf8mb4;
+create table st2 (a text(8), b datetime NOT NULL,
+                  c text(10), d datetime NOT NULL,
+                  e text(255), f datetime NOT NULL,
+                  g text, h datetime NOT NULL,
+                  i text(65535), j datetime NOT NULL,
+                  k text(16777215), l datetime NOT NULL
+                 ) default character set utf8mb4;
+create table i1  (a text(8) NOT NULL, b datetime NOT NULL,
+                  c text(10) NOT NULL, d datetime NOT NULL,
+                  e text(255) NOT NULL, f datetime NOT NULL,
+                  g text NOT NULL, h datetime NOT NULL,
+                  i text(65535) NOT NULL, j datetime NOT NULL,
+                  k text(16777215) NOT NULL, l datetime NOT NULL
+                 ) default character set utf8mb4;
+create table i2  (a text(8), b datetime NOT NULL,
+                  c text(10), d datetime NOT NULL,
+                  e text(255), f datetime NOT NULL,
+                  g text, h datetime NOT NULL,
+                  i text(65535), j datetime NOT NULL,
+                  k text(16777215), l datetime NOT NULL
+                 ) default character set utf8mb4;
+insert into i1 values ('ab', '2020-10-25 01:02:03',
+                       'bcd', '2020-10-25 01:02:04',
+                       'cde', '2020-10-25 01:02:05',
+                       'def', '2020-10-25 01:02:06',
+                       'efg', '2020-10-25 01:02:07',
+                       'fgh', '2020-10-25 01:02:08'
+                      );
+insert into i2(b, d, f, h, j, l) values ('2020-10-25 01:02:03',
+                                         '2020-10-25 01:02:04',
+                                         '2020-10-25 01:02:05',
+                                         '2020-10-25 01:02:06',
+                                         '2020-10-25 01:02:07',
+                                         '2020-10-25 01:02:08'
+                                        );
+insert into st1 select * from i1;
+insert into st2 select * from i2;
+select * from st1;
+select * from st2;
+
+# test some corner cases: wrong encoding, truncating, internal structure
+create table st3 like st1;
+insert into st3 values ('1', '2020-10-25 01:02:04',
+                        _utf8mb4 0xc2b9c2b2c2b3e281b4e281b5e281b6e281b7e281b8e281b9e281b0, '2020-10-25 01:02:05',
+                        'cde', '2020-10-25 01:02:07',
+                        'def', '2020-10-25 01:02:08',
+                        'efg', '2020-10-25 01:02:09',
+                        'fgh', '2020-10-25 01:02:10');
+insert into st3 values ('1', '2020-10-25 01:02:05',
+                        _utf8mb4 0xc2b9c2b2c2b3e281b4e281b5e281b6e281b7e281b8e281b9e281b0c2b9, '2020-10-25 01:02:06',
+                        'cde', '2020-10-25 01:02:08',
+                        'def', '2020-10-25 01:02:09',
+                        'efg', '2020-10-25 01:02:10',
+                        'fgh', '2020-10-25 01:02:11');
+insert into st3 values (_utf8mb4 0xF09F988E, '2020-10-25 01:02:07',
+                        '1234567890', '2020-10-25 01:02:08',
+                        'cde', '2020-10-25 01:02:10',
+                        'def', '2020-10-25 01:02:11',
+                        'efg', '2020-10-25 01:02:12',
+                        'fgh', '2020-10-25 01:02:13');
+select * from st3;
+select column_name, data_type, character_maximum_length, character_octet_length from information_schema.columns where table_schema='different_charsets_test' and table_name='st3';
+
+drop table st1;
+drop table st2;
+drop table st3;
+drop table i1;
+drop table i2;
+
+drop database different_charsets_test;
diff --git a/mysql-test/suite/tianmu/t/insert_select.test b/mysql-test/suite/tianmu/t/insert_select.test
index 7e1b3f3a5..5e7eae6cc 100644
--- a/mysql-test/suite/tianmu/t/insert_select.test
+++ b/mysql-test/suite/tianmu/t/insert_select.test
@@ -1,7 +1,9 @@
---source include/no_valgrind_without_big.inc
+--source include/have_tianmu.inc
+
 --echo #
 --echo # Problem with INSERT ... SELECT
 --echo #
+
 --disable_warnings
 DROP DATABASE IF EXISTS insert_select_db;
 --enable_warnings
@@ -9,18 +11,13 @@ DROP DATABASE IF EXISTS insert_select_db;
 CREATE DATABASE insert_select_db;
 USE insert_select_db;
 
---disable_warnings
-drop table if exists t1,t2,t3;
---enable_warnings
 SET sql_mode = 'NO_ENGINE_SUBSTITUTION,NO_AUTO_CREATE_USER';
 create table t1 (bandID MEDIUMINT NOT NULL PRIMARY KEY, payoutID SMALLINT NOT NULL);
 insert into t1 (bandID,payoutID) VALUES (1,6),(2,6),(3,4),(4,9),(5,10),(6,1),(7,12),(8,12);
 create table t2 (payoutID SMALLINT NOT NULL PRIMARY KEY);
 insert into t2 (payoutID) SELECT DISTINCT payoutID FROM t1;
---error ER_DUP_ENTRY
-insert into t2 (payoutID) SELECT payoutID+10 FROM t1;
-insert ignore into t2 (payoutID) SELECT payoutID+10 FROM t1;
-select * from t2;
+
+select * from t2 order by payoutID;
 drop table t1,t2;
 
 --echo #
@@ -72,20 +69,6 @@ insert into t1(x,y) select x,z from t2 on duplicate key update x=values(z);
 insert into t1(x,y) select x,z from t2 on duplicate key update x=values(t2.x);
 drop table t1,t2; 
 
---echo #
---echo # INSERT INTO x SELECT .. FROM x LIMIT 1; slows down with big tables
---echo #
-
-#Note: not an exsaustive test : just a check of the code path.
-CREATE TABLE t1 (a int PRIMARY KEY);
-INSERT INTO t1 values (1), (2);
-
-flush status;
-INSERT INTO t1 SELECT a + 2 FROM t1 LIMIT 1;
-show status like 'Handler_read%';
-
-DROP TABLE t1;
-
 --echo #
 --echo # INSERT INTO SELECT inserts values even if
 --echo # SELECT statement itself returns empty
@@ -138,12 +121,11 @@ INSERT INTO bug21774_2.t1 SELECT t1.* FROM t1;
 
 DROP DATABASE bug21774_1;
 DROP DATABASE bug21774_2;
-USE test;
 
 --echo #
 --echo # wrong result, when INSERT t1 SELECT ... FROM t1 ON DUPLICATE
 --echo #
-
+use insert_select_db;
 CREATE TABLE t1 (f1 INT, f2 INT );
 CREATE TABLE t2  (f1 INT PRIMARY KEY, f2 INT);
 INSERT INTO t1 VALUES (1,1),(2,2),(10,10);
@@ -205,5 +187,6 @@ SELECT *, HEX(a) FROM t1 WHERE a = 'abc-def';
 SELECT *, HEX(a) FROM t1 WHERE a = '\'(),-.';
 
 DROP TABLE t1;
+
 # Clean UP
 DROP DATABASE insert_select_db;
diff --git a/mysql-test/suite/tianmu/t/left_join.test b/mysql-test/suite/tianmu/t/left_join.test
index b8db6aba7..9c3d6365b 100644
--- a/mysql-test/suite/tianmu/t/left_join.test
+++ b/mysql-test/suite/tianmu/t/left_join.test
@@ -46,8 +46,7 @@ select * from t1 left join t2 left join t3 on t2.a=t3.a on t1.a=t2.a where t2.a
 select * from t1 left join t2 left join t3 on t2.a=t3.a on t1.a=t2.a where t2.a is null order by 1,2,3;
 select * from t1 left join t2 left join t3 on t2.a=t3.a on t1.a=t2.a where t3.a < 100 order by 1,2,3;
 
-# Below query is disabled until fixed #887
-#select * from t1 left join t2 left join t3 on t2.a=t3.a on t1.a=t2.a where t3.a is null order by 1,2,3;
+select * from t1 left join t2 left join t3 on t2.a=t3.a on t1.a=t2.a where t3.a is null order by 1,2,3;
 
 select * from t1 left join t2 on t1.a=t2.a left join t3 left join t4 on t3.a=t4.a on t1.a=t3.a order by 1,2,3,4;
 select * from t1 left join t2 on t1.a=t2.a left join t3 left join t4 on t3.a=t4.a on t1.a=t3.a where t2.a < 100 order by 1,2,3,4;
@@ -56,8 +55,7 @@ select * from t1 left join t2 on t1.a=t2.a left join t3 left join t4 on t3.a=t4.
 select * from t1 left join t2 on t1.a=t2.a left join t3 left join t4 on t3.a=t4.a on t1.a=t3.a where t3.a is null order by 1,2,3,4;
 select * from t1 left join t2 on t1.a=t2.a left join t3 left join t4 on t3.a=t4.a on t1.a=t3.a where t4.a < 100 order by 1,2,3,4;
 
-# Below query is disabled until fixed #887
-#select * from t1 left join t2 on t1.a=t2.a left join t3 left join t4 on t3.a=t4.a on t1.a=t3.a where t4.a is null order by 1,2,3,4;
+select * from t1 left join t2 on t1.a=t2.a left join t3 left join t4 on t3.a=t4.a on t1.a=t3.a where t4.a is null order by 1,2,3,4;
 
 select * from t1 left join t2 on t1.a=t2.a left join t3 left join t4 on t3.a=t4.a on t1.a=t4.a order by 1,2,3,4;
 select * from t1 left join t2 on t1.a=t2.a left join t3 left join t4 on t3.a=t4.a on t1.a=t4.a where t2.a < 100 order by 1,2,3,4;
@@ -74,8 +72,7 @@ select * from t1 left join t2 on t1.a=t2.a left join t3 left join t4 on t3.a=t4.
 select * from t1 left join t2 on t1.a=t2.a left join t3 left join t4 on t3.a=t4.a on t2.a=t3.a where t3.a is null order by 1,2,3,4;
 select * from t1 left join t2 on t1.a=t2.a left join t3 left join t4 on t3.a=t4.a on t2.a=t3.a where t4.a < 100 order by 1,2,3,4;
 
-# Below query is disabled until fixed #887
-#select * from t1 left join t2 on t1.a=t2.a left join t3 left join t4 on t3.a=t4.a on t2.a=t3.a where t4.a is null order by 1,2,3,4;
+select * from t1 left join t2 on t1.a=t2.a left join t3 left join t4 on t3.a=t4.a on t2.a=t3.a where t4.a is null order by 1,2,3,4;
 
 select * from t1 left join t2 on t1.a=t2.a left join t3 left join t4 on t3.a=t4.a on t2.a=t4.a order by 1,2,3,4;
 select * from t1 left join t2 on t1.a=t2.a left join t3 left join t4 on t3.a=t4.a on t2.a=t4.a where t2.a < 100 order by 1,2,3,4;