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drop table if exists t1;
Warnings:
Note 1051 Unknown table 'test.t1'
#
# Test alter sequence
#
CREATE SEQUENCE t1 nocache engine=myisam;
select * from t1;
next_not_cached_value minimum_value maximum_value start_value increment cache_size cycle_option cycle_count
1 1 9223372036854775806 1 1 0 0 0
select next value for t1;
next value for t1
1
alter sequence t1 start=50;
show create sequence t1;
Table Create Table
t1 CREATE SEQUENCE `t1` start with 50 minvalue 1 maxvalue 9223372036854775806 increment by 1 nocache nocycle ENGINE=MyISAM
select * from t1;
next_not_cached_value minimum_value maximum_value start_value increment cache_size cycle_option cycle_count
2 1 9223372036854775806 50 1 0 0 0
select next value for t1;
next value for t1
2
alter sequence t1 minvalue=-100;
show create sequence t1;
Table Create Table
t1 CREATE SEQUENCE `t1` start with 50 minvalue -100 maxvalue 9223372036854775806 increment by 1 nocache nocycle ENGINE=MyISAM
select * from t1;
next_not_cached_value minimum_value maximum_value start_value increment cache_size cycle_option cycle_count
3 -100 9223372036854775806 50 1 0 0 0
alter sequence t1 minvalue=100 start=100;
ERROR HY000: Sequence 'test.t1' values are conflicting
alter sequence t1 minvalue=100 start=100 restart=100;
show create sequence t1;
Table Create Table
t1 CREATE SEQUENCE `t1` start with 100 minvalue 100 maxvalue 9223372036854775806 increment by 1 nocache nocycle ENGINE=MyISAM
select * from t1;
next_not_cached_value minimum_value maximum_value start_value increment cache_size cycle_option cycle_count
100 100 9223372036854775806 100 1 0 0 0
alter sequence t1 maxvalue=500;
show create sequence t1;
Table Create Table
t1 CREATE SEQUENCE `t1` start with 100 minvalue 100 maxvalue 500 increment by 1 nocache nocycle ENGINE=MyISAM
select * from t1;
next_not_cached_value minimum_value maximum_value start_value increment cache_size cycle_option cycle_count
100 100 500 100 1 0 0 0
drop sequence t1;
CREATE SEQUENCE t1 engine=myisam;
alter sequence t1 nocache;
show create sequence t1;
Table Create Table
t1 CREATE SEQUENCE `t1` start with 1 minvalue 1 maxvalue 9223372036854775806 increment by 1 nocache nocycle ENGINE=MyISAM
alter sequence t1 cache=100;
flush tables;
show create sequence t1;
Table Create Table
t1 CREATE SEQUENCE `t1` start with 1 minvalue 1 maxvalue 9223372036854775806 increment by 1 cache 100 nocycle ENGINE=MyISAM
alter sequence t1 nocache;
show create sequence t1;
Table Create Table
t1 CREATE SEQUENCE `t1` start with 1 minvalue 1 maxvalue 9223372036854775806 increment by 1 nocache nocycle ENGINE=MyISAM
flush tables;
show create sequence t1;
Table Create Table
t1 CREATE SEQUENCE `t1` start with 1 minvalue 1 maxvalue 9223372036854775806 increment by 1 nocache nocycle ENGINE=MyISAM
select * from t1;
next_not_cached_value minimum_value maximum_value start_value increment cache_size cycle_option cycle_count
1 1 9223372036854775806 1 1 0 0 0
select next value for t1;
next value for t1
1
select next value for t1;
next value for t1
2
select next value for t1;
next value for t1
3
select next_not_cached_value, cycle_count from t1;
next_not_cached_value cycle_count
4 0
drop sequence t1;
CREATE SEQUENCE t1 maxvalue=100 engine=myisam;
alter sequence t1 no maxvalue;
show create sequence t1;
Table Create Table
t1 CREATE SEQUENCE `t1` start with 1 minvalue 1 maxvalue 9223372036854775806 increment by 1 cache 1000 nocycle ENGINE=MyISAM
select * from t1;
next_not_cached_value minimum_value maximum_value start_value increment cache_size cycle_option cycle_count
1 1 9223372036854775806 1 1 1000 0 0
alter sequence t1 cycle;
show create sequence t1;
Table Create Table
t1 CREATE SEQUENCE `t1` start with 1 minvalue 1 maxvalue 9223372036854775806 increment by 1 cache 1000 cycle ENGINE=MyISAM
alter sequence t1 nocycle;
alter sequence t1 start=15 restart minvalue=10 maxvalue=20 cycle;
show create sequence t1;
Table Create Table
t1 CREATE SEQUENCE `t1` start with 15 minvalue 10 maxvalue 20 increment by 1 cache 1000 cycle ENGINE=MyISAM
select * from t1;
next_not_cached_value minimum_value maximum_value start_value increment cache_size cycle_option cycle_count
15 10 20 15 1 1000 1 0
select NEXT VALUE for t1 from seq_1_to_10;
NEXT VALUE for t1
15
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20
10
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alter sequence t1 restart with 17 minvalue=10 maxvalue=20 cycle;
select NEXT VALUE for t1 from seq_1_to_10;
NEXT VALUE for t1
17
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drop sequence t1;
CREATE SEQUENCE t1 maxvalue=100;
alter sequence t1 increment=-2 start with 50 minvalue=-100;
show create sequence t1;
Table Create Table
t1 CREATE SEQUENCE `t1` start with 50 minvalue -100 maxvalue 100 increment by -2 cache 1000 nocycle ENGINE=MyISAM
select * from t1;
next_not_cached_value minimum_value maximum_value start_value increment cache_size cycle_option cycle_count
1 -100 100 50 -2 1000 0 0
select NEXT VALUE for t1 from seq_1_to_10;
NEXT VALUE for t1
1
-1
-3
-5
-7
-9
-11
-13
-15
-17
drop sequence t1;
#
# InnoDB (some things work different with InnoDB)
CREATE SEQUENCE t1 cache 10 engine=innodb;
select * from t1;
next_not_cached_value minimum_value maximum_value start_value increment cache_size cycle_option cycle_count
1 1 9223372036854775806 1 1 10 0 0
select next value for t1;
next value for t1
1
alter sequence t1 start=100;
show create sequence t1;
Table Create Table
t1 CREATE SEQUENCE `t1` start with 100 minvalue 1 maxvalue 9223372036854775806 increment by 1 cache 10 nocycle ENGINE=InnoDB
select * from t1;
next_not_cached_value minimum_value maximum_value start_value increment cache_size cycle_option cycle_count
11 1 9223372036854775806 100 1 10 0 0
select next value for t1;
next value for t1
11
drop sequence t1;
#
# ALTER TABLE
#
CREATE SEQUENCE t1 engine=innodb;
select next value for t1;
next value for t1
1
alter table t1 rename t2;
select next value for t2;
next value for t2
1001
rename table t2 to t1;
select next value for t1;
next value for t1
2001
alter table t1 comment="foo";
show create sequence t1;
Table Create Table
t1 CREATE SEQUENCE `t1` start with 1 minvalue 1 maxvalue 9223372036854775806 increment by 1 cache 1000 nocycle ENGINE=InnoDB COMMENT='foo'
alter table t1 engine=myisam;
show create sequence t1;
Table Create Table
t1 CREATE SEQUENCE `t1` start with 1 minvalue 1 maxvalue 9223372036854775806 increment by 1 cache 1000 nocycle ENGINE=MyISAM COMMENT='foo'
alter table t1 engine=innodb;
show create sequence t1;
Table Create Table
t1 CREATE SEQUENCE `t1` start with 1 minvalue 1 maxvalue 9223372036854775806 increment by 1 cache 1000 nocycle ENGINE=InnoDB COMMENT='foo'
select * from t1;
next_not_cached_value minimum_value maximum_value start_value increment cache_size cycle_option cycle_count
3001 1 9223372036854775806 1 1 1000 0 0
drop sequence t1;
CREATE SEQUENCE t1 engine=myisam;
alter sequence t1 minvalue=100;
ERROR HY000: Sequence 'test.t1' values are conflicting
drop sequence t1;
CREATE SEQUENCE t1 engine=myisam;
alter sequence t1 minvalue=25 maxvalue=20;
ERROR HY000: Sequence 'test.t1' values are conflicting
drop sequence t1;
create table t1 (a int);
alter sequence t1 minvalue=100;
ERROR 42S02: 'test.t1' is not a SEQUENCE
drop table t1;
alter sequence if exists t1 minvalue=100;
Warnings:
Note 4091 Unknown SEQUENCE: 'test.t1'
alter sequence t1 minvalue=100;
ERROR 42S02: Table 'test.t1' doesn't exist
create sequence t1;
alter sequence t1;
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near '' at line 1
drop sequence t1;
CREATE SEQUENCE t1 maxvalue=100;
alter sequence t1 increment=-2 start with 50;
select next value for t1;
next value for t1
1
select next value for t1;
ERROR HY000: Sequence 'test.t1' has run out
select * from t1;
next_not_cached_value minimum_value maximum_value start_value increment cache_size cycle_option cycle_count
0 1 100 50 -2 1000 0 0
alter sequence t1 restart;
select next value for t1;
next value for t1
50
alter sequence t1 restart with 90;
select next value for t1;
next value for t1
90
drop sequence t1;
CREATE SEQUENCE t1 engine=innodb;
ALTER IGNORE TABLE t1 ADD CHECK (start_value < minimum_value);
ERROR HY000: Sequence 'test.t1' table structure is invalid (Sequence tables cannot have any constraints)
DROP SEQUENCE t1;
CREATE SEQUENCE s;
ALTER TABLE s ORDER BY cache_size;
ERROR HY000: Sequence 'test.s' table structure is invalid (ORDER BY)
SELECT NEXTVAL(s);
NEXTVAL(s)
1
DROP SEQUENCE s;
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