127 lines
3.2 KiB
Plaintext
127 lines
3.2 KiB
Plaintext
create database seq_db;
|
|
use seq_db;
|
|
create table s_fake (a int, primary key (a));
|
|
create sequence s_nocache start with 1 maxvalue 1000 increment by 1 nocache;
|
|
create sequence s_cache start with 1 maxvalue 1000 increment by 3 cache 3;
|
|
create sequence s_time timestamp cache 2;
|
|
####################################
|
|
0. show cache parameters
|
|
####################################
|
|
select nextval_show();
|
|
ERROR 42000: Incorrect parameter count in the call to native function 'nextval_show'
|
|
select nextval_show(s_nocache, 1);
|
|
ERROR 42000: Incorrect parameter count in the call to native function 'nextval_show'
|
|
select nextval_show("table_err");
|
|
ERROR 42000: Incorrect parameters in the call to native function 'nextval_show'
|
|
select nextval_show(table_err);
|
|
ERROR 42S02: Table 'seq_db.table_err' doesn't exist
|
|
select nextval_show(s_fake);
|
|
ERROR HY000: Table 'seq_db.s_fake' should be sequence
|
|
####################################
|
|
1. base show cache
|
|
####################################
|
|
use seq_db;
|
|
select nextval_show(s_nocache);
|
|
nextval_show(s_nocache)
|
|
1
|
|
select nextval_show(s_cache);
|
|
nextval_show(s_cache)
|
|
1
|
|
select nextval_show(s_time);
|
|
nextval_show(s_time)
|
|
#
|
|
select nextval(s_nocache);
|
|
nextval(s_nocache)
|
|
1
|
|
select nextval(s_cache);
|
|
nextval(s_cache)
|
|
1
|
|
select nextval(s_time);
|
|
nextval(s_time)
|
|
#
|
|
select nextval_show(s_nocache);
|
|
nextval_show(s_nocache)
|
|
2
|
|
select nextval_show(s_cache);
|
|
nextval_show(s_cache)
|
|
4
|
|
use seq_db;
|
|
select nextval_show(s_nocache);
|
|
nextval_show(s_nocache)
|
|
2
|
|
select nextval_show(s_cache);
|
|
nextval_show(s_cache)
|
|
4
|
|
####################################
|
|
2.show cache will reload table for digest
|
|
####################################
|
|
select nextval(s_cache);
|
|
nextval(s_cache)
|
|
4
|
|
select nextval(s_cache);
|
|
nextval(s_cache)
|
|
7
|
|
select nextval(s_cache);
|
|
nextval(s_cache)
|
|
10
|
|
select * from s_cache;
|
|
currval nextval minvalue maxvalue start increment cache cycle round
|
|
0 13 1 1000 1 3 3 0 0
|
|
select nextval_show(s_cache);
|
|
nextval_show(s_cache)
|
|
13
|
|
select * from s_cache;
|
|
currval nextval minvalue maxvalue start increment cache cycle round
|
|
0 25 1 1000 1 3 3 0 0
|
|
####################################
|
|
3.show cache after skip
|
|
####################################
|
|
select nextval_skip(s_nocache, 10);
|
|
nextval_skip(s_nocache, 10)
|
|
2
|
|
select nextval_skip(s_cache, 30);
|
|
nextval_skip(s_cache, 30)
|
|
13
|
|
select nextval_show(s_nocache);
|
|
nextval_show(s_nocache)
|
|
11
|
|
select nextval_show(s_cache);
|
|
nextval_show(s_cache)
|
|
33
|
|
select nextval(s_nocache);
|
|
nextval(s_nocache)
|
|
11
|
|
select nextval(s_cache);
|
|
nextval(s_cache)
|
|
33
|
|
select nextval_show(s_nocache);
|
|
nextval_show(s_nocache)
|
|
12
|
|
select nextval_show(s_cache);
|
|
nextval_show(s_cache)
|
|
36
|
|
####################################
|
|
4.show cache when run out
|
|
####################################
|
|
select nextval_skip(s_nocache, 999);
|
|
nextval_skip(s_nocache, 999)
|
|
12
|
|
select nextval_skip(s_cache, 999);
|
|
nextval_skip(s_cache, 999)
|
|
36
|
|
select nextval(s_nocache);
|
|
nextval(s_nocache)
|
|
1000
|
|
select nextval(s_cache);
|
|
nextval(s_cache)
|
|
1000
|
|
select nextval(s_nocache);
|
|
ERROR HY000: Sequence 'seq_db.s_nocache' has run out.
|
|
select nextval(s_cache);
|
|
ERROR HY000: Sequence 'seq_db.s_cache' has run out.
|
|
select nextval_show(s_nocache);
|
|
ERROR HY000: Sequence 'seq_db.s_nocache' has run out.
|
|
select nextval_show(s_cache);
|
|
ERROR HY000: Sequence 'seq_db.s_cache' has run out.
|
|
drop database seq_db;
|