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;