create table t1 (a date not null, b varchar(50) not null, c varchar(50) not null, d enum('m', 'w'), primary key(a,b,c,d)) engine='MyISAM' 
partition by key (a,b,c,d) (
partition pa1 max_rows=20 min_rows=2,
partition pa2 max_rows=30 min_rows=3,
partition pa3 max_rows=30 min_rows=4,
partition pa4 max_rows=40 min_rows=2);
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `a` date NOT NULL,
  `b` varchar(50) NOT NULL,
  `c` varchar(50) NOT NULL,
  `d` enum('m','w') NOT NULL DEFAULT 'm',
  PRIMARY KEY (`a`,`b`,`c`,`d`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1
/*!50100 PARTITION BY KEY (a,b,c,d)
(PARTITION pa1 MAX_ROWS = 20 MIN_ROWS = 2 ENGINE = MyISAM,
 PARTITION pa2 MAX_ROWS = 30 MIN_ROWS = 3 ENGINE = MyISAM,
 PARTITION pa3 MAX_ROWS = 30 MIN_ROWS = 4 ENGINE = MyISAM,
 PARTITION pa4 MAX_ROWS = 40 MIN_ROWS = 2 ENGINE = MyISAM) */
insert into t1 values 
('1975-01-01', 'abcde', 'abcde','m'), 
('1983-12-31', 'cdef', 'srtbvsr', 'w'), 
('1980-10-14', 'fgbbd', 'dtzndtz', 'w'),
('2000-06-15', 'jukg','zikhuk','m');
select * from t1;
a	b	c	d
1983-12-31	cdef	srtbvsr	w
1980-10-14	fgbbd	dtzndtz	w
1975-01-01	abcde	abcde	m
2000-06-15	jukg	zikhuk	m
select * from t1 where a<19851231;
a	b	c	d
1983-12-31	cdef	srtbvsr	w
1980-10-14	fgbbd	dtzndtz	w
1975-01-01	abcde	abcde	m
drop table t1;
create table t1 (a date not null, b varchar(50) not null, c varchar(50) not null, d enum('m', 'w') not null, e int not null, f decimal (18,2) not null, g bigint not null, h tinyint not null, i char(255), primary key(a,b,c,d,e,f,g,h)) engine='MyISAM' 
partition by key(a,b,c,d,e,f,g,h) (
partition pa1 max_rows=20 min_rows=2,
partition pa2 max_rows=30 min_rows=3,
partition pa3 max_rows=30 min_rows=4,
partition pa4 max_rows=40 min_rows=2);
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `a` date NOT NULL,
  `b` varchar(50) NOT NULL,
  `c` varchar(50) NOT NULL,
  `d` enum('m','w') NOT NULL,
  `e` int(11) NOT NULL,
  `f` decimal(18,2) NOT NULL,
  `g` bigint(20) NOT NULL,
  `h` tinyint(4) NOT NULL,
  `i` char(255) DEFAULT NULL,
  PRIMARY KEY (`a`,`b`,`c`,`d`,`e`,`f`,`g`,`h`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1
/*!50100 PARTITION BY KEY (a,b,c,d,e,f,g,h)
(PARTITION pa1 MAX_ROWS = 20 MIN_ROWS = 2 ENGINE = MyISAM,
 PARTITION pa2 MAX_ROWS = 30 MIN_ROWS = 3 ENGINE = MyISAM,
 PARTITION pa3 MAX_ROWS = 30 MIN_ROWS = 4 ENGINE = MyISAM,
 PARTITION pa4 MAX_ROWS = 40 MIN_ROWS = 2 ENGINE = MyISAM) */
insert into t1 values 
('1975-01-01', 'abcde', 'abcde','m', 1234, 123.45, 32412341234, 113, 'tbhth nrzh ztfghgfh fzh ftzhj fztjh'), 
('1983-12-31', 'cdef', 'srtbvsr', 'w', 45634, 13452.56, 3452346456, 127, 'liuugbzvdmrlti b itiortudirtfgtibm dfi'), 
('1980-10-14', 'fgbbd', 'dtzndtz', 'w', 67856, 5463354.67, 3567845333, 124, 'd,f söierugsig msireg siug ei5ggth lrutluitgzeöjrtnb.rkjthuekuhzrkuthgjdnffjmbr'),
('2000-06-15', 'jukg','zikhuk','m', 45675, 6465754.13, 435242623462, 18, 'pib mdotkbm.m' );
select * from t1;
a	b	c	d	e	f	g	h	i
1980-10-14	fgbbd	dtzndtz	w	67856	5463354.67	3567845333	124	d,f söierugsig msireg siug ei5ggth lrutluitgzeöjrtnb.rkjthuekuhzrkuthgjdnffjmbr
1983-12-31	cdef	srtbvsr	w	45634	13452.56	3452346456	127	liuugbzvdmrlti b itiortudirtfgtibm dfi
1975-01-01	abcde	abcde	m	1234	123.45	32412341234	113	tbhth nrzh ztfghgfh fzh ftzhj fztjh
2000-06-15	jukg	zikhuk	m	45675	6465754.13	435242623462	18	pib mdotkbm.m
select * from t1 where a<19851231;
a	b	c	d	e	f	g	h	i
1980-10-14	fgbbd	dtzndtz	w	67856	5463354.67	3567845333	124	d,f söierugsig msireg siug ei5ggth lrutluitgzeöjrtnb.rkjthuekuhzrkuthgjdnffjmbr
1983-12-31	cdef	srtbvsr	w	45634	13452.56	3452346456	127	liuugbzvdmrlti b itiortudirtfgtibm dfi
1975-01-01	abcde	abcde	m	1234	123.45	32412341234	113	tbhth nrzh ztfghgfh fzh ftzhj fztjh
drop table t1;
create table t1 (a date not null, b varchar(50) not null, c varchar(50) not null, d enum('m', 'w') not null, e int not null, f decimal (18,2) not null, g bigint not null, h tinyint not null, a1 date not null, b1 varchar(50) not null, c1 varchar(50) not null, d1 enum('m', 'w') not null, e1 int not null, f1 decimal (18,2) not null, g1 bigint not null, h1 tinyint not null, i char(255), primary key(a,b,c,d,e,f,g,h,a1,b1,c1,d1,e1,f1,g1,h1)) engine='MyISAM' 
partition by key(a,b,c,d,e,f,g,h,a1,b1,c1,d1,e1,f1,g1,h1) (
partition pa1 max_rows=20 min_rows=2,
partition pa2 max_rows=30 min_rows=3,
partition pa3 max_rows=30 min_rows=4,
partition pa4 max_rows=40 min_rows=2);
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `a` date NOT NULL,
  `b` varchar(50) NOT NULL,
  `c` varchar(50) NOT NULL,
  `d` enum('m','w') NOT NULL,
  `e` int(11) NOT NULL,
  `f` decimal(18,2) NOT NULL,
  `g` bigint(20) NOT NULL,
  `h` tinyint(4) NOT NULL,
  `a1` date NOT NULL,
  `b1` varchar(50) NOT NULL,
  `c1` varchar(50) NOT NULL,
  `d1` enum('m','w') NOT NULL,
  `e1` int(11) NOT NULL,
  `f1` decimal(18,2) NOT NULL,
  `g1` bigint(20) NOT NULL,
  `h1` tinyint(4) NOT NULL,
  `i` char(255) DEFAULT NULL,
  PRIMARY KEY (`a`,`b`,`c`,`d`,`e`,`f`,`g`,`h`,`a1`,`b1`,`c1`,`d1`,`e1`,`f1`,`g1`,`h1`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1
/*!50100 PARTITION BY KEY (a,b,c,d,e,f,g,h,a1,b1,c1,d1,e1,f1,g1,h1)
(PARTITION pa1 MAX_ROWS = 20 MIN_ROWS = 2 ENGINE = MyISAM,
 PARTITION pa2 MAX_ROWS = 30 MIN_ROWS = 3 ENGINE = MyISAM,
 PARTITION pa3 MAX_ROWS = 30 MIN_ROWS = 4 ENGINE = MyISAM,
 PARTITION pa4 MAX_ROWS = 40 MIN_ROWS = 2 ENGINE = MyISAM) */
insert into t1 values 
('1975-01-01', 'abcde', 'abcde','m', 1234, 123.45, 32412341234, 113,'1975-01-01', 'abcde', 'abcde','m', 1234, 123.45, 32412341234, 113, 'tbhth nrzh ztfghgfh fzh ftzhj fztjh'), 
('1983-12-31', 'cdef', 'srtbvsr', 'w', 45634, 13452.56, 3452346456, 127,'1983-12-31', 'cdef', 'srtbvsr', 'w', 45634, 13452.56, 3452346456, 127, 'liuugbzvdmrlti b itiortudirtfgtibm dfi'), 
('1980-10-14', 'fgbbd', 'dtzndtz', 'w', 67856, 5463354.67, 3567845333, 124,'1980-10-14', 'fgbbd', 'dtzndtz', 'w', 67856, 5463354.67, 3567845333, 124, 'd,f söierugsig msireg siug ei5ggth lrutluitgzeöjrtnb.rkjthuekuhzrkuthgjdnffjmbr'),
('2000-06-15', 'jukg','zikhuk','m', 45675, 6465754.13, 435242623462, 18, '2000-06-15', 'jukg','zikhuk','m', 45675, 6465754.13, 435242623462, 18, 'pib mdotkbm.m');
select * from t1;
a	b	c	d	e	f	g	h	a1	b1	c1	d1	e1	f1	g1	h1	i
1983-12-31	cdef	srtbvsr	w	45634	13452.56	3452346456	127	1983-12-31	cdef	srtbvsr	w	45634	13452.56	3452346456	127	liuugbzvdmrlti b itiortudirtfgtibm dfi
1980-10-14	fgbbd	dtzndtz	w	67856	5463354.67	3567845333	124	1980-10-14	fgbbd	dtzndtz	w	67856	5463354.67	3567845333	124	d,f söierugsig msireg siug ei5ggth lrutluitgzeöjrtnb.rkjthuekuhzrkuthgjdnffjmbr
1975-01-01	abcde	abcde	m	1234	123.45	32412341234	113	1975-01-01	abcde	abcde	m	1234	123.45	32412341234	113	tbhth nrzh ztfghgfh fzh ftzhj fztjh
2000-06-15	jukg	zikhuk	m	45675	6465754.13	435242623462	18	2000-06-15	jukg	zikhuk	m	45675	6465754.13	435242623462	18	pib mdotkbm.m
select * from t1 where a<19851231;
a	b	c	d	e	f	g	h	a1	b1	c1	d1	e1	f1	g1	h1	i
1983-12-31	cdef	srtbvsr	w	45634	13452.56	3452346456	127	1983-12-31	cdef	srtbvsr	w	45634	13452.56	3452346456	127	liuugbzvdmrlti b itiortudirtfgtibm dfi
1980-10-14	fgbbd	dtzndtz	w	67856	5463354.67	3567845333	124	1980-10-14	fgbbd	dtzndtz	w	67856	5463354.67	3567845333	124	d,f söierugsig msireg siug ei5ggth lrutluitgzeöjrtnb.rkjthuekuhzrkuthgjdnffjmbr
1975-01-01	abcde	abcde	m	1234	123.45	32412341234	113	1975-01-01	abcde	abcde	m	1234	123.45	32412341234	113	tbhth nrzh ztfghgfh fzh ftzhj fztjh
drop table t1;
create table t1 (a date not null, b varchar(50) not null, c varchar(50) not null, d enum('m', 'w') not null, e int not null, f decimal (18,2) not null, g bigint not null, h tinyint not null, a1 date not null, b1 varchar(50) not null, c1 varchar(50) not null, d1 enum('m', 'w') not null, e1 int not null, f1 decimal (18,2) not null, g1 bigint not null, h1 tinyint not null, a2 date not null, b2 varchar(50) not null, c2 varchar(50) not null, d2 enum('m', 'w') not null, e2 int not null, f2 decimal (18,2) not null, g2 bigint not null, h2 tinyint not null, a3 date not null, b3 varchar(50) not null, c3 varchar(50) not null, d3 enum('m', 'w') not null, e3 int not null, f3 decimal (18,2) not null, g3 bigint not null, h3 tinyint not null, i char(255), primary key(a,b,c,d,e,f,g,h,a1,b1,c1,d1,e1,f1,g1,h1,a2,b2,c2,d2,e2,f2,g2,h2,a3,b3,c3,d3,e3,f3,g3,h3)) engine='MyISAM' 
partition by key(a,b,c,d,e,f,g,h,a1,b1,c1,d1,e1,f1,g1,h1,a2,b2,c2,d2,e2,f2,g2,h2,a3,b3,c3,d3,e3,f3,g3,h3) (
partition pa1 max_rows=20 min_rows=2,
partition pa2 max_rows=30 min_rows=3,
partition pa3 max_rows=30 min_rows=4,
partition pa4 max_rows=40 min_rows=2);
ERROR 42000: Too many key parts specified; max 16 parts allowed
create table t1 (a date not null, b varchar(50) not null, c varchar(50) not null, d enum('m', 'w') not null, e int not null, f decimal (18,2) not null, g bigint not null, h tinyint not null, a1 date not null, b1 varchar(50) not null, c1 varchar(50) not null, d1 enum('m', 'w') not null, e1 int not null, f1 decimal (18,2) not null, g1 bigint not null, h1 tinyint not null, a2 date not null, b2 varchar(50) not null, c2 varchar(50) not null, d2 enum('m', 'w') not null, e2 int not null, f2 decimal (18,2) not null, g2 bigint not null, h2 tinyint not null, a3 date not null, b3 varchar(50) not null, c3 varchar(50) not null, d3 enum('m', 'w') not null, e3 int not null, f3 decimal (18,2) not null, g3 bigint not null, h3 tinyint not null, i char(255), primary key(a,b,c,d,e,f,g,h,a1,b1,c1,d1,e1,f1,g1,h1)) engine='MyISAM' 
partition by key(a,b,c,d,e,f,g,h) (
partition pa1 max_rows=20 min_rows=2,
partition pa2 max_rows=30 min_rows=3,
partition pa3 max_rows=30 min_rows=4,
partition pa4 max_rows=40 min_rows=2);
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `a` date NOT NULL,
  `b` varchar(50) NOT NULL,
  `c` varchar(50) NOT NULL,
  `d` enum('m','w') NOT NULL,
  `e` int(11) NOT NULL,
  `f` decimal(18,2) NOT NULL,
  `g` bigint(20) NOT NULL,
  `h` tinyint(4) NOT NULL,
  `a1` date NOT NULL,
  `b1` varchar(50) NOT NULL,
  `c1` varchar(50) NOT NULL,
  `d1` enum('m','w') NOT NULL,
  `e1` int(11) NOT NULL,
  `f1` decimal(18,2) NOT NULL,
  `g1` bigint(20) NOT NULL,
  `h1` tinyint(4) NOT NULL,
  `a2` date NOT NULL,
  `b2` varchar(50) NOT NULL,
  `c2` varchar(50) NOT NULL,
  `d2` enum('m','w') NOT NULL,
  `e2` int(11) NOT NULL,
  `f2` decimal(18,2) NOT NULL,
  `g2` bigint(20) NOT NULL,
  `h2` tinyint(4) NOT NULL,
  `a3` date NOT NULL,
  `b3` varchar(50) NOT NULL,
  `c3` varchar(50) NOT NULL,
  `d3` enum('m','w') NOT NULL,
  `e3` int(11) NOT NULL,
  `f3` decimal(18,2) NOT NULL,
  `g3` bigint(20) NOT NULL,
  `h3` tinyint(4) NOT NULL,
  `i` char(255) DEFAULT NULL,
  PRIMARY KEY (`a`,`b`,`c`,`d`,`e`,`f`,`g`,`h`,`a1`,`b1`,`c1`,`d1`,`e1`,`f1`,`g1`,`h1`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1
/*!50100 PARTITION BY KEY (a,b,c,d,e,f,g,h)
(PARTITION pa1 MAX_ROWS = 20 MIN_ROWS = 2 ENGINE = MyISAM,
 PARTITION pa2 MAX_ROWS = 30 MIN_ROWS = 3 ENGINE = MyISAM,
 PARTITION pa3 MAX_ROWS = 30 MIN_ROWS = 4 ENGINE = MyISAM,
 PARTITION pa4 MAX_ROWS = 40 MIN_ROWS = 2 ENGINE = MyISAM) */
insert into t1 values 
('1975-01-01', 'abcde', 'abcde','m', 1234, 123.45, 32412341234, 113,'1975-01-01', 'abcde', 'abcde','m', 1234, 123.45, 32412341234, 113,'1975-01-01', 'abcde', 'abcde','m', 1234, 123.45, 32412341234, 113, '1975-01-01', 'abcde', 'abcde','m', 1234, 123.45, 32412341234, 113, 'tbhth nrzh ztfghgfh fzh ftzhj fztjh'), 
('1983-12-31', 'cdef', 'srtbvsr', 'w', 45634, 13452.56, 3452346456, 127,'1983-12-31', 'cdef', 'srtbvsr', 'w', 45634, 13452.56, 3452346456, 127, '1983-12-31', 'cdef', 'srtbvsr', 'w', 45634, 13452.56, 3452346456, 127, '1983-12-31', 'cdef', 'srtbvsr', 'w', 45634, 13452.56, 3452346456, 127, 'liuugbzvdmrlti b itiortudirtfgtibm dfi'), 
('1980-10-14', 'fgbbd', 'dtzndtz', 'w', 67856, 5463354.67, 3567845333, 124, '1980-10-14', 'fgbbd', 'dtzndtz', 'w', 67856, 5463354.67, 3567845333, 124, '1980-10-14', 'fgbbd', 'dtzndtz', 'w', 67856, 5463354.67, 3567845333, 124, '1980-10-14', 'fgbbd', 'dtzndtz', 'w', 67856, 5463354.67, 3567845333, 124, 'd,f söierugsig msireg siug ei5ggth lrutluitgzeöjrtnb.rkjthuekuhzrkuthgjdnffjmbr'),
('2000-06-15', 'jukg','zikhuk','m', 45675, 6465754.13, 435242623462, 18, '2000-06-15', 'jukg','zikhuk','m', 45675, 6465754.13, 435242623462, 18, '2000-06-15', 'jukg','zikhuk','m', 45675, 6465754.13, 435242623462, 18, '2000-06-15', 'jukg','zikhuk','m', 45675, 6465754.13, 435242623462, 18, 'pib mdotkbm.m');
select * from t1;
a	b	c	d	e	f	g	h	a1	b1	c1	d1	e1	f1	g1	h1	a2	b2	c2	d2	e2	f2	g2	h2	a3	b3	c3	d3	e3	f3	g3	h3	i
1980-10-14	fgbbd	dtzndtz	w	67856	5463354.67	3567845333	124	1980-10-14	fgbbd	dtzndtz	w	67856	5463354.67	3567845333	124	1980-10-14	fgbbd	dtzndtz	w	67856	5463354.67	3567845333	124	1980-10-14	fgbbd	dtzndtz	w	67856	5463354.67	3567845333	124	d,f söierugsig msireg siug ei5ggth lrutluitgzeöjrtnb.rkjthuekuhzrkuthgjdnffjmbr
1983-12-31	cdef	srtbvsr	w	45634	13452.56	3452346456	127	1983-12-31	cdef	srtbvsr	w	45634	13452.56	3452346456	127	1983-12-31	cdef	srtbvsr	w	45634	13452.56	3452346456	127	1983-12-31	cdef	srtbvsr	w	45634	13452.56	3452346456	127	liuugbzvdmrlti b itiortudirtfgtibm dfi
1975-01-01	abcde	abcde	m	1234	123.45	32412341234	113	1975-01-01	abcde	abcde	m	1234	123.45	32412341234	113	1975-01-01	abcde	abcde	m	1234	123.45	32412341234	113	1975-01-01	abcde	abcde	m	1234	123.45	32412341234	113	tbhth nrzh ztfghgfh fzh ftzhj fztjh
2000-06-15	jukg	zikhuk	m	45675	6465754.13	435242623462	18	2000-06-15	jukg	zikhuk	m	45675	6465754.13	435242623462	18	2000-06-15	jukg	zikhuk	m	45675	6465754.13	435242623462	18	2000-06-15	jukg	zikhuk	m	45675	6465754.13	435242623462	18	pib mdotkbm.m
select * from t1 where a<19851231;
a	b	c	d	e	f	g	h	a1	b1	c1	d1	e1	f1	g1	h1	a2	b2	c2	d2	e2	f2	g2	h2	a3	b3	c3	d3	e3	f3	g3	h3	i
1980-10-14	fgbbd	dtzndtz	w	67856	5463354.67	3567845333	124	1980-10-14	fgbbd	dtzndtz	w	67856	5463354.67	3567845333	124	1980-10-14	fgbbd	dtzndtz	w	67856	5463354.67	3567845333	124	1980-10-14	fgbbd	dtzndtz	w	67856	5463354.67	3567845333	124	d,f söierugsig msireg siug ei5ggth lrutluitgzeöjrtnb.rkjthuekuhzrkuthgjdnffjmbr
1983-12-31	cdef	srtbvsr	w	45634	13452.56	3452346456	127	1983-12-31	cdef	srtbvsr	w	45634	13452.56	3452346456	127	1983-12-31	cdef	srtbvsr	w	45634	13452.56	3452346456	127	1983-12-31	cdef	srtbvsr	w	45634	13452.56	3452346456	127	liuugbzvdmrlti b itiortudirtfgtibm dfi
1975-01-01	abcde	abcde	m	1234	123.45	32412341234	113	1975-01-01	abcde	abcde	m	1234	123.45	32412341234	113	1975-01-01	abcde	abcde	m	1234	123.45	32412341234	113	1975-01-01	abcde	abcde	m	1234	123.45	32412341234	113	tbhth nrzh ztfghgfh fzh ftzhj fztjh
drop table t1;