~drizzle-trunk/drizzle/development

drop table if exists t1;

SET SQL_SELECT_LIMIT=4, MAX_JOIN_SIZE=9;

create table t1 (a int auto_increment primary key, b char(20));

insert into t1 values(1,"test");

SELECT SQL_BUFFER_RESULT * from t1;

a	b

1	test

update t1 set b="a" where a=1;

delete from t1 where a=1;

insert into t1 values(1,"test"),(2,"test2");

SELECT SQL_BUFFER_RESULT * from t1;

a	b

1	test

2	test2

update t1 set b="a" where a=1;

select 1 from t1,t1 as t2,t1 as t3;

1

1

1

1

1

update t1 set b="a";

update t1 set b="a" where b="test";

delete from t1;

delete from t1 where b="test";

delete from t1 where a+0=1;

select 1 from t1,t1 as t2,t1 as t3,t1 as t4,t1 as t5;

1

update t1 set b="a" limit 1;

update t1 set b="a" where b="b" limit 2;

delete from t1 where b="test" limit 1;

delete from t1 where a+0=1 limit 2;

alter table t1 add key b (b);

SET MAX_JOIN_SIZE=2;

SELECT @@MAX_JOIN_SIZE, @@SQL_BIG_SELECTS;

@@MAX_JOIN_SIZE	@@SQL_BIG_SELECTS

2	0

insert into t1 values (null,"a"),(null,"a"),(null,"a"),(null,"a"),(null,"a"),(null,"a"),(null,"a"),(null,"a"),(null,"a"),(null,"a");

SELECT * from t1 order by a;

ERROR 42000: The SELECT would examine more than MAX_JOIN_SIZE rows; check your WHERE and use SET SQL_BIG_SELECTS=1 or SET MAX_JOIN_SIZE=# if the SELECT is okay

SET SQL_BIG_SELECTS=1;

SELECT * from t1 order by a;

a	b

3	a

4	a

5	a

6	a

SET MAX_JOIN_SIZE=2;

SELECT * from t1;

ERROR 42000: The SELECT would examine more than MAX_JOIN_SIZE rows; check your WHERE and use SET SQL_BIG_SELECTS=1 or SET MAX_JOIN_SIZE=# if the SELECT is okay

SET MAX_JOIN_SIZE=DEFAULT;

SELECT * from t1;

a	b

3	a

4	a

5	a

6	a

analyze table t1;

Table	Op	Msg_type	Msg_text

test.t1	analyze	status	OK

insert into t1 values (null,"a"),(null,"a"),(null,"a"),(null,"a"),(null,"a"),(null,"a"),(null,"a"),(null,"a"),(null,"a"),(null,"a");

explain select STRAIGHT_JOIN * from t1,t1 as t2 where t1.b=t2.b;

id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra

1	SIMPLE	t1	index	b	PRIMARY	4	NULL	20	

1	SIMPLE	t2	ref	b	b	83	test.t1.b	10	Using where; Using index

set MAX_SEEKS_FOR_KEY=1;

explain select STRAIGHT_JOIN * from t1,t1 as t2 where t1.b=t2.b;

id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra

1	SIMPLE	t1	index	b	PRIMARY	4	NULL	20	

1	SIMPLE	t2	ref	b	b	83	test.t1.b	10	Using where; Using index

SET MAX_SEEKS_FOR_KEY=DEFAULT;

drop table t1;

create table t1 (a int);

insert into t1 values (1),(2),(3),(4),(5);

insert into t1 select * from t1;

insert into t1 select * from t1;

insert into t1 select * from t1;

set local  max_join_size=8;

select * from (select * from t1) x;

ERROR 42000: The SELECT would examine more than MAX_JOIN_SIZE rows; check your WHERE and use SET SQL_BIG_SELECTS=1 or SET MAX_JOIN_SIZE=# if the SELECT is okay

set local  max_join_size=1;

select * from (select a.a as aa, b.a as ba from t1 a, t1 b) x;

ERROR 42000: The SELECT would examine more than MAX_JOIN_SIZE rows; check your WHERE and use SET SQL_BIG_SELECTS=1 or SET MAX_JOIN_SIZE=# if the SELECT is okay

set local  max_join_size=1;

select * from (select 1 union select 2 union select 3) x;

ERROR 42000: The SELECT would examine more than MAX_JOIN_SIZE rows; check your WHERE and use SET SQL_BIG_SELECTS=1 or SET MAX_JOIN_SIZE=# if the SELECT is okay

drop table t1;

SET SQL_SELECT_LIMIT=DEFAULT, MAX_JOIN_SIZE=DEFAULT;