diff --git a/mysql-test/suite/tianmu/r/aliases.result b/mysql-test/suite/tianmu/r/aliases.result
new file mode 100644
index 000000000..17ce57c58
--- /dev/null
+++ b/mysql-test/suite/tianmu/r/aliases.result
@@ -0,0 +1,91 @@
+#
+# aliases test case
+#
+DROP DATABASE IF EXISTS aliases_test;
+CREATE DATABASE aliases_test;
+USE aliases_test;
+CREATE TABLE t1
+(
+t1_tinyint TINYINT DEFAULT 0,
+t1_int INT DEFAULT NULL,
+t1_bigint BIGINT,
+t1_decimal DECIMAL(5,2),
+t1_text TEXT,
+t1_char CHAR(5),
+t1_varchar VARCHAR(255) DEFAULT 'hello world!',
+t1_datetime DATETIME
+)ENGINE=Tianmu;
+INSERT INTO t1 VALUES(NULL, NULL, NULL, NULL, '', '', '', NULL);
+INSERT INTO t1 VALUES(1, 11, 987654321, 122.32, repeat('z', 20), 'aaa', repeat('a', 20), '1111-11-09 11:11:11');
+INSERT INTO t1 VALUES(0, 12, 887654321, 222.32, repeat('y', 20), 'aaa', repeat('b', 20), '1111-11-11 11:11:12');
+INSERT INTO t1 VALUES(1, -12, -987654321, -122.32, repeat('z', 20), 'bbb', repeat('a', 20), '1111-11-10 11:11:10');
+INSERT INTO t1 VALUES(0, -11, -887654321, -222.32, repeat('x', 20), 'bbb', repeat('b', 20), '1111-11-1 11:11:19');
+SELECT * FROM t1;
+t1_tinyint	t1_int	t1_bigint	t1_decimal	t1_text	t1_char	t1_varchar	t1_datetime
+NULL	NULL	NULL	NULL				NULL
+1	11	987654321	122.32	zzzzzzzzzzzzzzzzzzzz	aaa	aaaaaaaaaaaaaaaaaaaa	1111-11-09 11:11:11
+0	12	887654321	222.32	yyyyyyyyyyyyyyyyyyyy	aaa	bbbbbbbbbbbbbbbbbbbb	1111-11-11 11:11:12
+1	-12	-987654321	-122.32	zzzzzzzzzzzzzzzzzzzz	bbb	aaaaaaaaaaaaaaaaaaaa	1111-11-10 11:11:10
+0	-11	-887654321	-222.32	xxxxxxxxxxxxxxxxxxxx	bbb	bbbbbbbbbbbbbbbbbbbb	1111-11-01 11:11:19
+SELECT COUNT(*) AS 'Total Rows' FROM t1;
+Total Rows
+5
+SELECT SUM(t1_int*t1_int) AS 'Sum of Squares of Integer values' FROM t1;
+Sum of Squares of Integer values
+530
+SELECT t1_int 'Serial no', t1_text 'Name of the Book', t1_datetime 'Publish Date' FROM t1;
+Serial no	Name of the Book	Publish Date
+NULL		NULL
+11	zzzzzzzzzzzzzzzzzzzz	1111-11-09 11:11:11
+12	yyyyyyyyyyyyyyyyyyyy	1111-11-11 11:11:12
+-12	zzzzzzzzzzzzzzzzzzzz	1111-11-10 11:11:10
+-11	xxxxxxxxxxxxxxxxxxxx	1111-11-01 11:11:19
+SELECT CONCAT(t1_char, t1_text, t1_varchar) 'Concatinating String Columns' FROM t1;
+Concatinating String Columns
+
+aaazzzzzzzzzzzzzzzzzzzzaaaaaaaaaaaaaaaaaaaa
+aaayyyyyyyyyyyyyyyyyyyybbbbbbbbbbbbbbbbbbbb
+bbbzzzzzzzzzzzzzzzzzzzzaaaaaaaaaaaaaaaaaaaa
+bbbxxxxxxxxxxxxxxxxxxxxbbbbbbbbbbbbbbbbbbbb
+SELECT t1_tinyint AS 'Boolean value' FROM t1;
+Boolean value
+NULL
+1
+0
+1
+0
+SELECT t1_tinyint 'Tinyint', t1_bigint 'Big Int', t1_decimal 'Decimal', t1_text AS 'Text', t1_varchar AS 'Varchar', t1_datetime AS 'Date' FROM t1 WHERE 'Decimal' >= -300 ORDER BY 'Date';
+Tinyint	Big Int	Decimal	Text	Varchar	Date
+NULL	NULL	NULL			NULL
+1	987654321	122.32	zzzzzzzzzzzzzzzzzzzz	aaaaaaaaaaaaaaaaaaaa	1111-11-09 11:11:11
+0	887654321	222.32	yyyyyyyyyyyyyyyyyyyy	bbbbbbbbbbbbbbbbbbbb	1111-11-11 11:11:12
+1	-987654321	-122.32	zzzzzzzzzzzzzzzzzzzz	aaaaaaaaaaaaaaaaaaaa	1111-11-10 11:11:10
+0	-887654321	-222.32	xxxxxxxxxxxxxxxxxxxx	bbbbbbbbbbbbbbbbbbbb	1111-11-01 11:11:19
+SELECT COUNT(*) AS 'Total rows' FROM t1 AS table1 , t1 AS table2 WHERE table1.t1_int = table2.t1_int;
+Total rows
+4
+SELECT table1.t1_tinyint, table2.t1_int FROM t1 AS table1 JOIN t1 AS table2 ON table1.t1_int = table2.t1_int;
+t1_tinyint	t1_int
+1	11
+0	12
+1	-12
+0	-11
+CREATE TABLE t2(col1 INT, col2 TEXT)ENGINE=Tianmu;
+INSERT INTO t2 VALUES(1, repeat('s',20)),(2, repeat('o',20)),(3, 'sss'),(4, 'ooo');
+CREATE TABLE t3(col1 INT, col2 DATETIME)ENGINE=Tianmu;
+INSERT INTO t3 VALUES(1, '2020-2-2'),(2, '2020-3-3');
+SELECT table1.col1, table1.col2 AS 'Text from table1', table2.col2 AS 'Date from table2' FROM t2 AS table1 JOIN t3 AS table2 ON table1.col1 =  table2.col1;
+col1	Text from table1	Date from table2
+1	ssssssssssssssssssss	2020-02-02 00:00:00
+2	oooooooooooooooooooo	2020-03-03 00:00:00
+SELECT table1.col1, table1.col2 AS 'Text from table1', table2.col2 AS 'Date from table2' FROM t2 AS table1 LEFT JOIN t3 AS table2 ON table1.col1 =  table2.col1;
+col1	Text from table1	Date from table2
+1	ssssssssssssssssssss	2020-02-02 00:00:00
+2	oooooooooooooooooooo	2020-03-03 00:00:00
+3	sss	NULL
+4	ooo	NULL
+SELECT table1.col1, table1.col2 AS 'Text from table1', table2.col2 AS 'Date from table2' FROM t2 AS table1 RIGHT JOIN t3 AS table2 ON table1.col1 =  table2.col1;
+col1	Text from table1	Date from table2
+1	ssssssssssssssssssss	2020-02-02 00:00:00
+2	oooooooooooooooooooo	2020-03-03 00:00:00
+DROP DATABASE aliases_test;
diff --git a/mysql-test/suite/tianmu/r/issue415.result b/mysql-test/suite/tianmu/r/issue415.result
index 249be6857..1fda9d870 100644
--- a/mysql-test/suite/tianmu/r/issue415.result
+++ b/mysql-test/suite/tianmu/r/issue415.result
@@ -1,3 +1,6 @@
+#
+# fix issue415
+#
 use test;
 CREATE TABLE `select_base_with_primary_key` (
 `pk` bigint(11) NOT NULL AUTO_INCREMENT,
diff --git a/mysql-test/suite/tianmu/r/type_timestamp.result b/mysql-test/suite/tianmu/r/type_timestamp.result
new file mode 100644
index 000000000..92bd3bc20
--- /dev/null
+++ b/mysql-test/suite/tianmu/r/type_timestamp.result
@@ -0,0 +1,111 @@
+#
+# Test cases for the TIMESTAMP datatype
+#
+DROP DATABASE IF EXISTS timestamp_test;
+set sql_mode='STRICT_TRANS_TABLES,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION';
+CREATE DATABASE timestamp_test;
+USE timestamp_test;
+CREATE TABLE ctimestamp (a timestamp);
+SET time_zone='-5:00';
+INSERT INTO ctimestamp VALUES ('2019-01-01 01:02:03'), ('2019-05-05 01:01:01');
+SET time_zone='+1:00';
+SELECT a FROM ctimestamp ORDER BY a;
+a
+2019-01-01 07:02:03
+2019-05-05 07:01:01
+SET time_zone='-2:00';
+SELECT a FROM ctimestamp ORDER BY a;
+a
+2019-01-01 04:02:03
+2019-05-05 04:01:01
+CREATE TABLE ctimestamp2 (a timestamp DEFAULT 0);
+INSERT INTO ctimestamp2 SELECT * FROM ctimestamp;
+SELECT a FROM ctimestamp2 ORDER BY a;
+a
+2019-01-01 04:02:03
+2019-05-05 04:01:01
+CREATE TABLE ctimestamp3 (a timestamp);
+INSERT INTO ctimestamp3 VALUES (19940101), (940101),
+(19940101010203), (940101010203), ('1994-01-01T01:02:03');
+SELECT a FROM ctimestamp3 ORDER BY a;
+a
+1994-01-01 00:00:00
+1994-01-01 00:00:00
+1994-01-01 01:02:03
+1994-01-01 01:02:03
+1994-01-01 01:02:03
+DROP DATABASE IF EXISTS timestamp_test;
+CREATE DATABASE timestamp_test;
+USE timestamp_test;
+CREATE TABLE ctimestamp (a timestamp);
+SET time_zone='+0:00';
+INSERT INTO ctimestamp VALUES ('2019-01-02 00:02:03'),
+('2019-01-02 01:02:03'), ('2019-01-02 10:11:12');
+SET time_zone='+1:00';
+SELECT a, a BETWEEN '2019-01-02 02:00:00' AND '2019-01-02 13:00:00'
+FROM ctimestamp ORDER BY a;
+a	a BETWEEN '2019-01-02 02:00:00' AND '2019-01-02 13:00:00'
+2019-01-02 01:02:03	0
+2019-01-02 02:02:03	1
+2019-01-02 11:11:12	1
+INSERT INTO ctimestamp VALUES ('2020-01-03 12:12:12'),
+('2020-05-06 12:12:12'), ('2020-10-28 12:12:12');
+SELECT a, DAYNAME(a), DAYOFWEEK(a), DATE_FORMAT(a, '%W %M %Y'),
+MONTHNAME(a), DATE(a), YEARWEEK(a), DAYOFYEAR(a), YEAR(a),
+a + INTERVAL 1 DAY, TIMESTAMPDIFF(DAY, a, '2020-01-01'),
+LAST_DAY(a), TRUNCATE(a, -2), a IN ('2019-01-02 01:02:03', a),
+TO_DAYS(a), DAY(a), WEEK(a), WEEKDAY(a), GREATEST(a, '2020-07-01'),
+MONTH(a), QUARTER(a), DATE_ADD(a, INTERVAL 1 SECOND)
+FROM ctimestamp WHERE a > '2020-01-01' ORDER BY a;
+a	DAYNAME(a)	DAYOFWEEK(a)	DATE_FORMAT(a, '%W %M %Y')	MONTHNAME(a)	DATE(a)	YEARWEEK(a)	DAYOFYEAR(a)	YEAR(a)	a + INTERVAL 1 DAY	TIMESTAMPDIFF(DAY, a, '2020-01-01')	LAST_DAY(a)	TRUNCATE(a, -2)	a IN ('2019-01-02 01:02:03', a)	TO_DAYS(a)	DAY(a)	WEEK(a)	WEEKDAY(a)	GREATEST(a, '2020-07-01')	MONTH(a)	QUARTER(a)	DATE_ADD(a, INTERVAL 1 SECOND)
+2020-01-03 12:12:12	Friday	6	Friday January 2020	January	2020-01-03	201952	3	2020	2020-01-04 12:12:12	-2	2020-01-31	20200103121200	1	737792	3	0	4	2020-07-01	1	1	2020-01-03 12:12:13
+2020-05-06 12:12:12	Wednesday	4	Wednesday May 2020	May	2020-05-06	202018	127	2020	2020-05-07 12:12:12	-126	2020-05-31	20200506121200	1	737916	6	18	2	2020-07-01	5	2	2020-05-06 12:12:13
+2020-10-28 12:12:12	Wednesday	4	Wednesday October 2020	October	2020-10-28	202043	302	2020	2020-10-29 12:12:12	-301	2020-10-31	20201028121200	1	738091	28	43	2	2020-10-28 12:12:12	10	4	2020-10-28 12:12:13
+SELECT UNIX_TIMESTAMP(a), TIME_TO_SEC(a), CEIL(a),
+CAST(LEAST(a, '2019-03-03 00:00:00') AS DATETIME),
+ROUND(a), SECOND(a), MINUTE(a), HOUR(a), FLOOR(a)
+FROM ctimestamp ORDER BY a;
+UNIX_TIMESTAMP(a)	TIME_TO_SEC(a)	CEIL(a)	CAST(LEAST(a, '2019-03-03 00:00:00') AS DATETIME)	ROUND(a)	SECOND(a)	MINUTE(a)	HOUR(a)	FLOOR(a)
+1546387323	3723	20190102010203	2019-01-02 01:02:03	20190102010203	3	2	1	20190102010203
+1546390923	7323	20190102020203	2019-01-02 02:02:03	20190102020203	3	2	2	20190102020203
+1546423872	40272	20190102111112	2019-01-02 11:11:12	20190102111112	12	11	11	20190102111112
+1578049932	43932	20200103121212	2019-03-03 00:00:00	20200103121212	12	12	12	20200103121212
+1588763532	43932	20200506121212	2019-03-03 00:00:00	20200506121212	12	12	12	20200506121212
+1603883532	43932	20201028121212	2019-03-03 00:00:00	20201028121212	12	12	12	20201028121212
+DROP DATABASE IF EXISTS timestamp_test;
+CREATE DATABASE timestamp_test;
+USE timestamp_test;
+CREATE TABLE ctimestamp (a timestamp, b int);
+SET time_zone='+0:00';
+INSERT INTO ctimestamp VALUES ('2019-01-03 12:12:12', 1),
+('2019-01-04 12:12:12', 2), ('2019-01-03 12:12:12', 4),
+('2019-01-03 12:12:12', 2), ('2019-01-04 12:12:12', 1);
+SELECT a, b, SUM(b)
+FROM ctimestamp;
+a	b	SUM(b)
+2019-01-03 12:12:12	1	10
+SELECT a, b, MAX(a)
+FROM ctimestamp;
+a	b	MAX(a)
+2019-01-03 12:12:12	1	2019-01-04 12:12:12
+DROP DATABASE IF EXISTS timestamp_test;
+CREATE DATABASE timestamp_test;
+USE timestamp_test;
+CREATE TABLE ctimestamp (a int, b timestamp);
+INSERT INTO ctimestamp VALUES (1, 20190101), (1, 20200202),
+(2, 20190202), (2, 20200202), (2, 20190101);
+SELECT b, count(*) FROM ctimestamp GROUP BY b ORDER BY b;
+b	count(*)
+2019-01-01 00:00:00	2
+2019-02-02 00:00:00	1
+2020-02-02 00:00:00	2
+SELECT b, max(a), min(a) FROM ctimestamp GROUP BY b ORDER BY b;
+b	max(a)	min(a)
+2019-01-01 00:00:00	2	1
+2019-02-02 00:00:00	2	2
+2020-02-02 00:00:00	2	1
+SELECT a, max(b), min(b) FROM ctimestamp GROUP BY a ORDER BY a;
+a	max(b)	min(b)
+1	2020-02-02 00:00:00	2019-01-01 00:00:00
+2	2020-02-02 00:00:00	2019-01-01 00:00:00
+DROP DATABASE timestamp_test;
diff --git a/mysql-test/suite/tianmu/t/aliases.test b/mysql-test/suite/tianmu/t/aliases.test
new file mode 100644
index 000000000..743086d64
--- /dev/null
+++ b/mysql-test/suite/tianmu/t/aliases.test
@@ -0,0 +1,54 @@
+--source include/have_tianmu.inc
+
+--echo #
+--echo # aliases test case
+--echo #
+
+--disable_warnings
+DROP DATABASE IF EXISTS aliases_test;
+--enable_warnings
+
+CREATE DATABASE aliases_test;
+USE aliases_test;
+
+CREATE TABLE t1
+(
+ t1_tinyint TINYINT DEFAULT 0,
+ t1_int INT DEFAULT NULL,
+ t1_bigint BIGINT,
+ t1_decimal DECIMAL(5,2),
+ t1_text TEXT,
+ t1_char CHAR(5),
+ t1_varchar VARCHAR(255) DEFAULT 'hello world!',
+ t1_datetime DATETIME
+)ENGINE=Tianmu;
+INSERT INTO t1 VALUES(NULL, NULL, NULL, NULL, '', '', '', NULL);
+INSERT INTO t1 VALUES(1, 11, 987654321, 122.32, repeat('z', 20), 'aaa', repeat('a', 20), '1111-11-09 11:11:11');
+INSERT INTO t1 VALUES(0, 12, 887654321, 222.32, repeat('y', 20), 'aaa', repeat('b', 20), '1111-11-11 11:11:12');
+INSERT INTO t1 VALUES(1, -12, -987654321, -122.32, repeat('z', 20), 'bbb', repeat('a', 20), '1111-11-10 11:11:10');
+INSERT INTO t1 VALUES(0, -11, -887654321, -222.32, repeat('x', 20), 'bbb', repeat('b', 20), '1111-11-1 11:11:19');
+
+SELECT * FROM t1;
+
+SELECT COUNT(*) AS 'Total Rows' FROM t1;
+SELECT SUM(t1_int*t1_int) AS 'Sum of Squares of Integer values' FROM t1;
+SELECT t1_int 'Serial no', t1_text 'Name of the Book', t1_datetime 'Publish Date' FROM t1;
+SELECT CONCAT(t1_char, t1_text, t1_varchar) 'Concatinating String Columns' FROM t1;
+SELECT t1_tinyint AS 'Boolean value' FROM t1;
+--disable_warnings
+SELECT t1_tinyint 'Tinyint', t1_bigint 'Big Int', t1_decimal 'Decimal', t1_text AS 'Text', t1_varchar AS 'Varchar', t1_datetime AS 'Date' FROM t1 WHERE 'Decimal' >= -300 ORDER BY 'Date';
+SELECT COUNT(*) AS 'Total rows' FROM t1 AS table1 , t1 AS table2 WHERE table1.t1_int = table2.t1_int;
+--enable_warnings
+SELECT table1.t1_tinyint, table2.t1_int FROM t1 AS table1 JOIN t1 AS table2 ON table1.t1_int = table2.t1_int;
+
+CREATE TABLE t2(col1 INT, col2 TEXT)ENGINE=Tianmu;
+INSERT INTO t2 VALUES(1, repeat('s',20)),(2, repeat('o',20)),(3, 'sss'),(4, 'ooo');
+CREATE TABLE t3(col1 INT, col2 DATETIME)ENGINE=Tianmu;
+INSERT INTO t3 VALUES(1, '2020-2-2'),(2, '2020-3-3');
+
+SELECT table1.col1, table1.col2 AS 'Text from table1', table2.col2 AS 'Date from table2' FROM t2 AS table1 JOIN t3 AS table2 ON table1.col1 =  table2.col1; 
+SELECT table1.col1, table1.col2 AS 'Text from table1', table2.col2 AS 'Date from table2' FROM t2 AS table1 LEFT JOIN t3 AS table2 ON table1.col1 =  table2.col1; 
+SELECT table1.col1, table1.col2 AS 'Text from table1', table2.col2 AS 'Date from table2' FROM t2 AS table1 RIGHT JOIN t3 AS table2 ON table1.col1 =  table2.col1; 
+
+# Clean UP
+DROP DATABASE aliases_test;
diff --git a/mysql-test/suite/tianmu/t/issue415.test b/mysql-test/suite/tianmu/t/issue415.test
index 9114b0123..9b477acaf 100644
--- a/mysql-test/suite/tianmu/t/issue415.test
+++ b/mysql-test/suite/tianmu/t/issue415.test
@@ -1,3 +1,9 @@
+--source include/have_tianmu.inc
+
+--echo #
+--echo # fix issue415
+--echo #
+
 use test;
 CREATE TABLE `select_base_with_primary_key` (
   `pk` bigint(11) NOT NULL AUTO_INCREMENT,
diff --git a/mysql-test/suite/tianmu/t/type_timestamp.test b/mysql-test/suite/tianmu/t/type_timestamp.test
new file mode 100644
index 000000000..cff43e755
--- /dev/null
+++ b/mysql-test/suite/tianmu/t/type_timestamp.test
@@ -0,0 +1,127 @@
+--source include/have_tianmu.inc
+
+--echo #
+--echo # Test cases for the TIMESTAMP datatype
+--echo #
+
+# Test insert/literals/microseconds
+--disable_warnings
+DROP DATABASE IF EXISTS timestamp_test;
+set sql_mode='STRICT_TRANS_TABLES,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION';
+--enable_warnings
+
+CREATE DATABASE timestamp_test;
+USE timestamp_test;
+
+## Test the effect of changing timezones on timestamp values
+CREATE TABLE ctimestamp (a timestamp);
+SET time_zone='-5:00';
+INSERT INTO ctimestamp VALUES ('2019-01-01 01:02:03'), ('2019-05-05 01:01:01');
+SET time_zone='+1:00';
+SELECT a FROM ctimestamp ORDER BY a;
+SET time_zone='-2:00';
+SELECT a FROM ctimestamp ORDER BY a;
+
+## Test insert
+CREATE TABLE ctimestamp2 (a timestamp DEFAULT 0);
+INSERT INTO ctimestamp2 SELECT * FROM ctimestamp;
+SELECT a FROM ctimestamp2 ORDER BY a;
+
+## Test literals
+CREATE TABLE ctimestamp3 (a timestamp);
+INSERT INTO ctimestamp3 VALUES (19940101), (940101),
+(19940101010203), (940101010203), ('1994-01-01T01:02:03');
+SELECT a FROM ctimestamp3 ORDER BY a;
+
+## Test microseconds error
+#CREATE TABLE ctimestamp4 (a timestamp(6) default 0);
+#INSERT INTO ctimestamp4 VALUES (0), ('2019-01-01 01:01:01.123456');
+#SELECT a, microsecond(a) FROM ctimestamp4 ORDER BY a;
+
+--disable_warnings
+DROP DATABASE IF EXISTS timestamp_test;
+--enable_warnings
+
+CREATE DATABASE timestamp_test;
+USE timestamp_test;
+
+CREATE TABLE ctimestamp (a timestamp);
+SET time_zone='+0:00';
+INSERT INTO ctimestamp VALUES ('2019-01-02 00:02:03'),
+('2019-01-02 01:02:03'), ('2019-01-02 10:11:12');
+SET time_zone='+1:00';
+
+SELECT a, a BETWEEN '2019-01-02 02:00:00' AND '2019-01-02 13:00:00'
+FROM ctimestamp ORDER BY a;
+
+#SELECT a, IF(a < '2019-01-02 02:00:00', 'yes', 'no'),
+#ADDTIME(a, '1:1:1'), STR_TO_DATE(a, '%Y-%m-%d %H:%i:%s'),
+#EXTRACT(DAY_HOUR FROM a), EXTRACT(MINUTE_SECOND FROM a),
+#TIME_FORMAT(a, '%H:\%i:\%s'), a RLIKE '02:03', IFNULL(NULL, a),
+#CASE a WHEN '2019-01-02 01:02:03' THEN 'found' WHEN '2019-01-02 11:11:12'
+#THEN 'found2' ELSE 'notfound' END, CHAR_LENGTH(a),
+#CAST(a AS UNSIGNED INT), CAST(a AS CHAR), CAST(a AS DATE),
+#TIME(CAST(a AS DATETIME)), TIME(COALESCE(NULL, a)), HEX(a),
+#NULLIF(a, '2019-01-02 01:02:03'), TIMEDIFF(a, '2019-01-01 01:02:03')
+#FROM ctimestamp ORDER BY a;
+
+INSERT INTO ctimestamp VALUES ('2020-01-03 12:12:12'),
+('2020-05-06 12:12:12'), ('2020-10-28 12:12:12');
+
+SELECT a, DAYNAME(a), DAYOFWEEK(a), DATE_FORMAT(a, '%W %M %Y'),
+MONTHNAME(a), DATE(a), YEARWEEK(a), DAYOFYEAR(a), YEAR(a),
+a + INTERVAL 1 DAY, TIMESTAMPDIFF(DAY, a, '2020-01-01'),
+LAST_DAY(a), TRUNCATE(a, -2), a IN ('2019-01-02 01:02:03', a),
+TO_DAYS(a), DAY(a), WEEK(a), WEEKDAY(a), GREATEST(a, '2020-07-01'),
+MONTH(a), QUARTER(a), DATE_ADD(a, INTERVAL 1 SECOND)
+FROM ctimestamp WHERE a > '2020-01-01' ORDER BY a;
+
+SELECT UNIX_TIMESTAMP(a), TIME_TO_SEC(a), CEIL(a),
+CAST(LEAST(a, '2019-03-03 00:00:00') AS DATETIME),
+ROUND(a), SECOND(a), MINUTE(a), HOUR(a), FLOOR(a)
+FROM ctimestamp ORDER BY a;
+
+--disable_warnings
+DROP DATABASE IF EXISTS timestamp_test;
+--enable_warnings
+
+CREATE DATABASE timestamp_test;
+USE timestamp_test;
+
+CREATE TABLE ctimestamp (a timestamp, b int);
+SET time_zone='+0:00';
+INSERT INTO ctimestamp VALUES ('2019-01-03 12:12:12', 1),
+('2019-01-04 12:12:12', 2), ('2019-01-03 12:12:12', 4),
+('2019-01-03 12:12:12', 2), ('2019-01-04 12:12:12', 1);
+
+## Test SUM
+
+SELECT a, b, SUM(b)
+FROM ctimestamp;
+
+## Test MAX
+
+SELECT a, b, MAX(a)
+FROM ctimestamp;
+
+# Test aggregate functions
+--disable_warnings
+DROP DATABASE IF EXISTS timestamp_test;
+--enable_warnings
+
+CREATE DATABASE timestamp_test;
+USE timestamp_test;
+
+CREATE TABLE ctimestamp (a int, b timestamp);
+INSERT INTO ctimestamp VALUES (1, 20190101), (1, 20200202),
+(2, 20190202), (2, 20200202), (2, 20190101);
+
+# Test count(*)
+SELECT b, count(*) FROM ctimestamp GROUP BY b ORDER BY b;
+
+# Test max/min
+SELECT b, max(a), min(a) FROM ctimestamp GROUP BY b ORDER BY b;
+SELECT a, max(b), min(b) FROM ctimestamp GROUP BY a ORDER BY a;
+
+# Cleanup
+DROP DATABASE timestamp_test;