select * from information_schema.engines where engine='sequence';
ENGINE SEQUENCE
SUPPORT YES
COMMENT Generated tables filled with sequential values
TRANSACTIONS YES
XA NO
SAVEPOINTS YES set sql_quote_show_create=0;
show create table seq_1_to_15_step_2;
Table Create Table
seq_1_to_15_step_2 CREATE TABLE seq_1_to_15_step_2 (
seq bigint(20) unsigned NOT NULL,
PRIMARY KEY (seq)
) ENGINE=SEQUENCE DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_uca1400_ai_ci
show create table seq_1_to_15_step; ERROR42S02: Table 'test.seq_1_to_15_step' doesn't exist
show create table seq_1_to_15_st; ERROR42S02: Table 'test.seq_1_to_15_st' doesn't exist
show create table seq_1_to_15;
Table Create Table
seq_1_to_15 CREATE TABLE seq_1_to_15 (
seq bigint(20) unsigned NOT NULL,
PRIMARY KEY (seq)
) ENGINE=SEQUENCE DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_uca1400_ai_ci
show create table seq_1_to_1;
Table Create Table
seq_1_to_1 CREATE TABLE seq_1_to_1 (
seq bigint(20) unsigned NOT NULL,
PRIMARY KEY (seq)
) ENGINE=SEQUENCE DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_uca1400_ai_ci
show create table seq_1_to_; ERROR42S02: Table 'test.seq_1_to_' doesn't exist
show create table seq_1_t; ERROR42S02: Table 'test.seq_1_t' doesn't exist
show create table seq_1; ERROR42S02: Table 'test.seq_1' doesn't exist
show create table seq_; ERROR42S02: Table 'test.seq_' doesn't exist
show create table se; ERROR42S02: Table 'test.se' doesn't exist
show create table seq_1_to_15_step_0; ERROR HY000: Got error140"Wrong create options" from storage engine SEQUENCE
show create table `seq_-1_to_15`; ERROR42S02: Table 'test.seq_-1_to_15' doesn't exist
show create table `seq_1_to_+2`; ERROR42S02: Table 'test.seq_1_to_+2' doesn't exist
select * from seq_1_to_15_step_2;
seq 1 3 5 7 9 11 13 15
select * from seq_1_to_15;
seq 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
select * from seq_1_to_1;
seq 1
select * from seq_15_to_1;
seq 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
select * from seq_15_to_1_step_2;
seq 15 13 11 9 7 5 3 1
select * from seq_1_to_15_step_12345;
seq 1
select * from seq_15_to_1_step_12345;
seq 15
explain select * from seq_15_to_1_step_12345;
id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE seq_15_to_1_step_12345 ALL NULL NULL NULL NULL 1
show open tables from test;
Database Table In_use Name_locked
test seq_15_to_1 00
test seq_15_to_1_step_12345 00
test seq_15_to_1_step_2 00
test seq_1_to_1 00
test seq_1_to_15 00
test seq_1_to_15_step_12345 00
test seq_1_to_15_step_2 00
show tables;
Tables_in_test
explain select * from seq_1_to_15_step_2;
id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE seq_1_to_15_step_2 index NULL PRIMARY 8 NULL 8 Using index
explain select * from seq_1_to_15_step_2 where seq > 10;
id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE seq_1_to_15_step_2 range PRIMARY PRIMARY 8 NULL 3 Using where; Using index
explain select * from seq_1_to_15_step_2 where seq between 4and9;
id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE seq_1_to_15_step_2 range PRIMARY PRIMARY 8 NULL 3 Using where; Using index
explain select * from seq_1_to_15_step_2 where seq between 20and30;
id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables
explain select * from seq_1_to_15_step_2 where seq between 4and6;
id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE seq_1_to_15_step_2 range PRIMARY PRIMARY 8 NULL 1 Using where; Using index
explain select * from seq_1_to_15_step_2 where seq between 4and5;
id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE seq_1_to_15_step_2 range PRIMARY PRIMARY 8 NULL 1 Using where; Using index
explain select * from seq_1_to_15_step_2 where seq between 4and4;
id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables
explain select * from seq_1_to_15_step_2 where seq between 5and5;
id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE seq_1_to_15_step_2 const PRIMARY PRIMARY 8 const 1 Using index
create table t1 (a int, aa int, b varchar(100));
insert t1 select seq, seq*seq, if (seq % 2, 'odd', 'even') from seq_1_to_20;
select * from t1;
a aa b 11 odd 24 even 39 odd 416 even 525 odd 636 even 749 odd 864 even 981 odd 10100 even 11121 odd 12144 even 13169 odd 14196 even 15225 odd 16256 even 17289 odd 18324 even 19361 odd 20400 even
select aa, b from t1, seq_1_to_20_step_3 as seq where a=seq;
aa b 1 odd 16 even 49 odd 100 even 169 odd 256 even 361 odd
insert t1
select seq, seq*seq, if (seq % 2, 'odd', 'even') from seq_1_to_30
where seq > (select max(a) from t1);
select * from t1;
a aa b 11 odd 24 even 39 odd 416 even 525 odd 636 even 749 odd 864 even 981 odd 10100 even 11121 odd 12144 even 13169 odd 14196 even 15225 odd 16256 even 17289 odd 18324 even 19361 odd 20400 even 21441 odd 22484 even 23529 odd 24576 even 25625 odd 26676 even 27729 odd 28784 even 29841 odd 30900 even
drop table t1;
select seq from seq_2_to_50 s1 where 0not in
(select s1.seq % s2.seq from seq_2_to_50 s2 where s2.seq <= sqrt(s1.seq));
seq 2 3 5 7 11 13 17 19 23 29 31 37 41 43 47
explain select seq from seq_2_to_50 s1 where 0not in
(select s1.seq % s2.seq from seq_2_to_50 s2 where s2.seq <= sqrt(s1.seq));
id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY s1 index NULL PRIMARY 8 NULL 49 Using where; Using index 2 DEPENDENT SUBQUERY s2 index PRIMARY PRIMARY 8 NULL 49 Using where; Using index
select year(dt) from
(select '1901-02-28' + interval seq year as dt from seq_0_to_99) as seqdt
where weekday(dt) = 0;
year(dt) 1910 1916 1921 1927 1938 1944 1949 1955 1966 1972 1977 1983 1994 2000
create table t1 (a int) engine=innodb;
reset master;
start transaction;
insert t1 select * from seq_1_to_10;
savepoint s1;
insert t1 select * from seq_11_to_20;
rollback to savepoint s1;
commit;
select count(*) from t1;
count(*) 10
include/show_binlog_events.inc
Log_name Pos Event_type Server_id End_log_pos Info
master-bin.000001 # Gtid # # BEGIN GTID #-#-#
master-bin.000001 # Query # # use `test`; insert t1 select * from seq_1_to_10
master-bin.000001 # Query # # SAVEPOINT s1
master-bin.000001 # Xid # # COMMIT /* XID */
drop table t1;
drop table seq_1_to_1; set binlog_format=statement;
lock table seq_1_to_2 write; set binlog_format=row;
lock table seq_1_to_2 write;
Messung V0.5 in Prozent
¤ Dauer der Verarbeitung: 0.10 Sekunden
(vorverarbeitet am 2026-10-08)
¤
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