drop table if exists t1,t3,t4,t5;
create table t1 (a int, b char(10), key a(a), key b(a,b));
insert into t1 values
(17,"ddd"),(18,"eee"),(19,"fff"),(19,"yyy"),
(14,"aaa"),(15,"bbb"),(16,"ccc"),(16,"xxx"),
(20,"ggg"),(21,"hhh"),(22,"iii");
handler t1 open as t2;
handler t2 read a=(SELECT 1);
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'SELECT 1)' at line 1
handler t2 read a first;
a	b
14	aaa
handler t2 read a next;
a	b
15	bbb
handler t2 read a next;
a	b
16	ccc
handler t2 read a prev;
a	b
15	bbb
handler t2 read a last;
a	b
22	iii
handler t2 read a prev;
a	b
21	hhh
handler t2 read a prev;
a	b
20	ggg
handler t2 read a first;
a	b
14	aaa
handler t2 read a prev;
a	b
handler t2 read a last;
a	b
22	iii
handler t2 read a prev;
a	b
21	hhh
handler t2 read a next;
a	b
22	iii
handler t2 read a next;
a	b
handler t2 read a=(15);
a	b
15	bbb
handler t2 read a=(16);
a	b
16	ccc
handler t2 read a=(19,"fff");
ERROR 42000: Too many key parts specified; max 1 parts allowed
handler t2 read b=(19,"fff");
a	b
19	fff
handler t2 read b=(19,"yyy");
a	b
19	yyy
handler t2 read b=(19);
a	b
19	fff
handler t1 read a last;
ERROR 42S02: Unknown table 't1' in HANDLER
handler t2 read a=(11);
a	b
handler t2 read a>=(11);
a	b
14	aaa
handler t2 read a=(18);
a	b
18	eee
handler t2 read a>=(18);
a	b
18	eee
handler t2 read a>(18);
a	b
19	fff
handler t2 read a<=(18);
a	b
18	eee
handler t2 read a<(18);
a	b
17	ddd
handler t2 read a first limit 5;
a	b
14	aaa
15	bbb
16	ccc
16	xxx
17	ddd
handler t2 read a next  limit 3;
a	b
18	eee
19	fff
19	yyy
handler t2 read a prev  limit 10;
a	b
19	fff
18	eee
17	ddd
16	xxx
16	ccc
15	bbb
14	aaa
handler t2 read a>=(16) limit 4;
a	b
16	ccc
16	xxx
17	ddd
18	eee
handler t2 read a>=(16) limit 2,2;
a	b
17	ddd
18	eee
handler t2 read a last  limit 3;
a	b
22	iii
21	hhh
20	ggg
handler t2 read a=(19);
a	b
19	fff
handler t2 read a=(19) where b="yyy";
a	b
19	yyy
handler t2 read first;
a	b
17	ddd
handler t2 read next;
a	b
18	eee
handler t2 read next;
a	b
19	fff
handler t2 read last;
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '' at line 1
handler t2 close;
handler t1 open as t2;
drop table t1;
create table t1 (a int);
insert into t1 values (17);
handler t2 read first;
ERROR 42S02: Unknown table 't2' in HANDLER
handler t1 open as t2;
alter table t1 engine=MyISAM;
handler t2 read first;
ERROR 42S02: Unknown table 't2' in HANDLER
drop table t1;
create table t1 (a int);
insert into t1 values (1),(2),(3),(4),(5),(6);
delete from t1 limit 2;
handler t1 open;
handler t1 read first;
a
3
handler t1 read first limit 1,1;
a
4
handler t1 read first limit 2,2;
a
5
6
delete from t1 limit 3;
handler t1 read first;
a
6
drop table t1;
create table t1(a int, index(a));
insert into t1 values (1), (2), (3);
handler t1 open;
handler t1 read a=(W);
ERROR 42S22: Unknown column 'W' in 'field list'
handler t1 read a=(a);
ERROR HY000: Incorrect arguments to HANDLER ... READ
drop table t1;
create table t1 (a char(5));
insert into t1 values ("Ok");
handler t1 open as t;
handler t read first;
a
Ok
use mysql;
handler t read first;
a
Ok
handler t close;
handler test.t1 open as t;
handler t read first;
a
Ok
handler t close;
use test;
drop table t1;
create table t1 ( a int, b int, INDEX a (a) );
insert into t1 values (1,2), (2,1);
handler t1 open;
handler t1 read a=(1) where b=2;
a	b
1	2
handler t1 read a=(1) where b=3;
a	b
handler t1 read a=(1) where b=1;
a	b
handler t1 close;
drop table t1;
drop database if exists test_test;
create database test_test;
use test_test;
create table t1(table_id char(20) primary key);
insert into t1 values ('test_test.t1');
insert into t1 values ('');
handler t1 open;
handler t1 read first limit 9;
table_id
test_test.t1

create table t2(table_id char(20) primary key);
insert into t2 values ('test_test.t2');
insert into t2 values ('');
handler t2 open;
handler t2 read first limit 9;
table_id
test_test.t2

use test;
drop table if exists t1;
create table t1(table_id char(20) primary key);
insert into t1 values ('test.t1');
insert into t1 values ('');
handler t1 open;
ERROR 42000: Not unique table/alias: 't1'
use test;
handler test.t1 read first limit 9;
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'read first limit 9' at line 1
handler test_test.t1 read first limit 9;
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'read first limit 9' at line 1
handler t1 read first limit 9;
table_id
test_test.t1

handler test_test.t2 read first limit 9;
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'read first limit 9' at line 1
handler t2 read first limit 9;
table_id
test_test.t2

handler test_test.t1 close;
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'close' at line 1
handler t1 close;
drop table test_test.t1;
handler test_test.t2 close;
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'close' at line 1
handler t2 close;
drop table test_test.t2;
drop database test_test;
use test;
handler test.t1 close;
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'close' at line 1
handler t1 close;
ERROR 42S02: Unknown table 't1' in HANDLER
drop table test.t1;
drop database if exists test_test;
drop table if exists t1;
drop table if exists t2;
drop table if exists t3;
create database test_test;
use test_test;
create table t1 (c1 char(20));
insert into t1 values ('test_test.t1');
create table t3 (c1 char(20));
insert into t3 values ('test_test.t3');
handler t1 open;
handler t1 read first limit 9;
c1
test_test.t1
handler t1 open h1;
handler h1 read first limit 9;
c1
test_test.t1
use test;
create table t1 (c1 char(20));
create table t2 (c1 char(20));
create table t3 (c1 char(20));
insert into t1 values ('t1');
insert into t2 values ('t2');
insert into t3 values ('t3');
handler t1 open;
ERROR 42000: Not unique table/alias: 't1'
handler t2 open t1;
ERROR 42000: Not unique table/alias: 't1'
handler t3 open t1;
ERROR 42000: Not unique table/alias: 't1'
handler t1 read first limit 9;
c1
test_test.t1
handler test.t1 close;
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'close' at line 1
handler test.t1 open h1;
ERROR 42000: Not unique table/alias: 'h1'
handler test_test.t1 open h1;
ERROR 42000: Not unique table/alias: 'h1'
handler test_test.t3 open h3;
handler test.t1 open h2;
handler t1 read first limit 9;
c1
test_test.t1
handler h1 read first limit 9;
c1
test_test.t1
handler h2 read first limit 9;
c1
t1
handler h3 read first limit 9;
c1
test_test.t3
handler h2 read first limit 9;
c1
t1
handler test.h1 close;
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'close' at line 1
handler t1 close;
handler h1 close;
handler h2 close;
handler t1 read first limit 9;
ERROR 42S02: Unknown table 't1' in HANDLER
handler h1 read first limit 9;
ERROR 42S02: Unknown table 'h1' in HANDLER
handler h2 read first limit 9;
ERROR 42S02: Unknown table 'h2' in HANDLER
handler h3 read first limit 9;
c1
test_test.t3
handler h3 read first limit 9;
c1
test_test.t3
use test_test;
handler h3 read first limit 9;
c1
test_test.t3
handler test.h3 read first limit 9;
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'read first limit 9' at line 1
handler h3 close;
use test;
drop table t3;
drop table t2;
drop table t1;
drop database test_test;
create table t1 (c1 char(20));
insert into t1 values ("t1");
handler t1 open as h1;
handler h1 read first limit 9;
c1
t1
create table t2 (c1 char(20));
insert into t2 values ("t2");
handler t2 open as h2;
handler h2 read first limit 9;
c1
t2
create table t3 (c1 char(20));
insert into t3 values ("t3");
handler t3 open as h3;
handler h3 read first limit 9;
c1
t3
create table t4 (c1 char(20));
insert into t4 values ("t4");
handler t4 open as h4;
handler h4 read first limit 9;
c1
t4
create table t5 (c1 char(20));
insert into t5 values ("t5");
handler t5 open as h5;
handler h5 read first limit 9;
c1
t5
alter table t1 engine=MyISAM;
handler h1 read first limit 9;
ERROR 42S02: Unknown table 'h1' in HANDLER
handler h2 read first limit 9;
c1
t2
handler h3 read first limit 9;
c1
t3
handler h4 read first limit 9;
c1
t4
handler h5 read first limit 9;
c1
t5
alter table t5 engine=MyISAM;
handler h1 read first limit 9;
ERROR 42S02: Unknown table 'h1' in HANDLER
handler h2 read first limit 9;
c1
t2
handler h3 read first limit 9;
c1
t3
handler h4 read first limit 9;
c1
t4
handler h5 read first limit 9;
ERROR 42S02: Unknown table 'h5' in HANDLER
alter table t3 engine=MyISAM;
handler h1 read first limit 9;
ERROR 42S02: Unknown table 'h1' in HANDLER
handler h2 read first limit 9;
c1
t2
handler h3 read first limit 9;
ERROR 42S02: Unknown table 'h3' in HANDLER
handler h4 read first limit 9;
c1
t4
handler h5 read first limit 9;
ERROR 42S02: Unknown table 'h5' in HANDLER
handler h2 close;
handler h4 close;
handler t1 open as h1_1;
handler t1 open as h1_2;
handler t1 open as h1_3;
handler h1_1 read first limit 9;
c1
t1
handler h1_2 read first limit 9;
c1
t1
handler h1_3 read first limit 9;
c1
t1
alter table t1 engine=MyISAM;
handler h1_1 read first limit 9;
ERROR 42S02: Unknown table 'h1_1' in HANDLER
handler h1_2 read first limit 9;
ERROR 42S02: Unknown table 'h1_2' in HANDLER
handler h1_3 read first limit 9;
ERROR 42S02: Unknown table 'h1_3' in HANDLER
drop table t1;
drop table t2;
drop table t3;
drop table t4;
drop table t5;
create table t1 (c1 int);
insert into t1 values (1);
handler t1 open;
handler t1 read first;
c1
1
send the below to another connection, do not wait for the result
optimize table t1;
proceed with the normal connection
handler t1 read next;
c1
1
handler t1 close;
read the result from the other connection
Table	Op	Msg_type	Msg_text
test.t1	optimize	status	OK
proceed with the normal connection
drop table t1;
create table t1 (c1 int);
insert into t1 values (14397);
flush tables with read lock;
drop table t1;
ERROR HY000: Can't execute the query because you have a conflicting read lock
send the below to another connection, do not wait for the result
drop table t1;
proceed with the normal connection
select * from t1;
c1
14397
unlock tables;
read the result from the other connection
proceed with the normal connection
select * from t1;
ERROR 42S02: Table 'test.t1' doesn't exist
drop table if exists t1;
Warnings:
Note	1051	Unknown table 't1'
drop table if exists t1;
create table t1 (a int) ENGINE=MEMORY;
--> client 2
handler t1 open;
ERROR HY000: Table storage engine for 't1' doesn't have this option
--> client 1
drop table t1;
drop table if exists t1;
create table t1 (a int);
handler t1 open as t1_alias;
handler t1_alias read a next;
ERROR HY000: Key 'a' doesn't exist in table 't1_alias'
handler t1_alias READ a next where inexistent > 0;
ERROR 42S22: Unknown column 'inexistent' in 'field list'
handler t1_alias read a next;
ERROR HY000: Key 'a' doesn't exist in table 't1_alias'
handler t1_alias READ a next where inexistent > 0;
ERROR 42S22: Unknown column 'inexistent' in 'field list'
handler t1_alias close;
drop table t1;