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164 lines
3.6 KiB
Text
164 lines
3.6 KiB
Text
drop table if exists t1;
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create table t1 (a int not null default 0 primary key, b int not null default 0);
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insert into t1 () values ();
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insert into t1 values (1,1),(2,1),(3,1);
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update t1 set a=4 where b=1 limit 1;
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select * from t1;
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a b
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0 0
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4 1
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2 1
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3 1
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update t1 set b=2 where b=1 limit 2;
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select * from t1;
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a b
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0 0
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4 2
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2 2
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3 1
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update t1 set b=4 where b=1;
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select * from t1;
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a b
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0 0
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4 2
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2 2
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3 4
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delete from t1 where b=2 limit 1;
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select * from t1;
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a b
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0 0
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2 2
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3 4
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delete from t1 limit 1;
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select * from t1;
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a b
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2 2
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3 4
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drop table t1;
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create table t1 (i int);
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insert into t1 (i) values(1),(1),(1);
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delete from t1 limit 1;
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update t1 set i=2 limit 1;
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delete from t1 limit 0;
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update t1 set i=3 limit 0;
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select * from t1;
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i
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2
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1
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drop table t1;
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select 0 limit 0;
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0
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CREATE TABLE t1(id int auto_increment primary key, id2 int, index(id2));
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INSERT INTO t1 (id2) values (0),(0),(0);
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DELETE FROM t1 WHERE id=1;
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INSERT INTO t1 SET id2=0;
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SELECT * FROM t1;
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id id2
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4 0
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2 0
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3 0
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DELETE FROM t1 WHERE id2 = 0 ORDER BY id LIMIT 1;
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SELECT * FROM t1;
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id id2
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4 0
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3 0
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DELETE FROM t1 WHERE id2 = 0 ORDER BY id desc LIMIT 1;
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SELECT * FROM t1;
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id id2
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3 0
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DROP TABLE t1;
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create table t1 (a integer);
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insert into t1 values (1);
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select 1 as a from t1 union all select 1 from dual limit 1;
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a
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1
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(select 1 as a from t1) union all (select 1 from dual) limit 1;
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a
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1
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drop table t1;
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create table t1 (a int);
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insert into t1 values (1),(2),(3),(4),(5),(6),(7);
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explain select count(*) c FROM t1 WHERE a > 0 ORDER BY c LIMIT 3;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 ALL NULL NULL NULL NULL 7 Using where
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select count(*) c FROM t1 WHERE a > 0 ORDER BY c LIMIT 3;
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c
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7
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explain select sum(a) c FROM t1 WHERE a > 0 ORDER BY c LIMIT 3;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 ALL NULL NULL NULL NULL 7 Using where
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select sum(a) c FROM t1 WHERE a > 0 ORDER BY c LIMIT 3;
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c
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28
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drop table t1;
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prepare s from "select 1 limit ?";
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set @a='qwe';
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execute s using @a;
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1
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set @a=-1;
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execute s using @a;
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ERROR HY000: Incorrect arguments to EXECUTE
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prepare s from "select 1 limit 1, ?";
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execute s using @a;
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ERROR HY000: Incorrect arguments to EXECUTE
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prepare s from "select 1 limit ?, ?";
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execute s using @a, @a;
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ERROR HY000: Incorrect arguments to EXECUTE
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set @a=14632475938453979136;
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execute s using @a, @a;
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1
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set @a=-14632475938453979136;
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execute s using @a, @a;
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ERROR HY000: Incorrect arguments to EXECUTE
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End of 5.0 tests
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select 1 as a limit 4294967296,10;
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a
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CREATE TABLE t1 (a int PRIMARY KEY auto_increment);
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INSERT INTO t1 VALUES (),(),(),(),(),(),(),(),(),();
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INSERT INTO t1 VALUES (),(),(),(),(),(),(),(),(),();
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SELECT a FROM t1 ORDER BY a LIMIT 10 OFFSET 1;
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a
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2
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3
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4
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5
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6
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7
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8
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9
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10
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11
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SELECT a FROM t1 ORDER BY a LIMIT 10 OFFSET 10;
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a
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11
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12
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13
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14
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15
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16
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17
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18
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19
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20
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SELECT a FROM t1 ORDER BY a LIMIT 2 OFFSET 14;
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a
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15
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16
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DROP TABLE t1;
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End of 5.1 tests
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#
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# mdev-16235: SELECT over a table with LIMIT 0
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#
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EXPLAIN
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SELECT * FROM mysql.slow_log WHERE sql_text != 'foo' LIMIT 0;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Zero limit
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SELECT * FROM mysql.slow_log WHERE sql_text != 'foo' LIMIT 0;
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start_time user_host query_time lock_time rows_sent rows_examined db last_insert_id insert_id server_id sql_text thread_id rows_affected
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EXPLAIN
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SELECT * FROM mysql.help_topic WHERE help_category_id != example LIMIT 0;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Zero limit
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SELECT * FROM mysql.help_topic WHERE help_category_id != example LIMIT 0;
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help_topic_id name help_category_id description example url
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End of 5.5 tests
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