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131 lines
3.3 KiB
Text
131 lines
3.3 KiB
Text
#
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# Test of update and delete with limit
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#
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--disable_warnings
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drop table if exists t1;
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--enable_warnings
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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 (); # Testing default 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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update t1 set b=2 where b=1 limit 2;
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select * from t1;
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update t1 set b=4 where b=1;
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select * from t1;
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delete from t1 where b=2 limit 1;
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select * from t1;
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delete from t1 limit 1;
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select * from t1;
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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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drop table t1;
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# LIMIT 0
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select 0 limit 0;
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#
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# Test with DELETE, ORDER BY and limit (bug #1024)
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#
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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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DELETE FROM t1 WHERE id2 = 0 ORDER BY id LIMIT 1;
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# should have deleted WHERE id=2
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SELECT * FROM t1;
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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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DROP TABLE t1;
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#
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# Bug#8023 - limit on UNION with from DUAL, causes syntax error
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#
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create table t1 (a integer);
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insert into t1 values (1);
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# both queries must return one row
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select 1 as a from t1 union all select 1 from dual limit 1;
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(select 1 as a from t1) union all (select 1 from dual) limit 1;
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drop table t1;
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#
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# Bug #21787: COUNT(*) + ORDER BY + LIMIT returns wrong result
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#
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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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select count(*) c FROM t1 WHERE a > 0 ORDER BY c LIMIT 3;
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explain select sum(a) c FROM t1 WHERE a > 0 ORDER BY c LIMIT 3;
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select sum(a) c FROM t1 WHERE a > 0 ORDER BY c LIMIT 3;
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drop table t1;
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# End of 4.1 tests
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#
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# Bug #28464: a string argument to 'limit ?' PS
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#
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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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set @a=-1;
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--error ER_WRONG_ARGUMENTS
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execute s using @a;
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prepare s from "select 1 limit 1, ?";
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--error ER_WRONG_ARGUMENTS
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execute s using @a;
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prepare s from "select 1 limit ?, ?";
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--error ER_WRONG_ARGUMENTS
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execute s using @a, @a;
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set @a=14632475938453979136;
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execute s using @a, @a;
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set @a=-14632475938453979136;
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--error ER_WRONG_ARGUMENTS
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execute s using @a, @a;
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--echo End of 5.0 tests
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#
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# Bug#37075: offset of limit clause might be truncated to 0 on 32-bits server w/o big tables
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#
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select 1 as a limit 4294967296,10;
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#
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# Test for LIMIT X OFFSET Y
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#
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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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SELECT a FROM t1 ORDER BY a LIMIT 10 OFFSET 10;
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SELECT a FROM t1 ORDER BY a LIMIT 2 OFFSET 14;
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DROP TABLE t1;
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--echo End of 5.1 tests
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--echo #
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--echo # mdev-16235: SELECT over a table with LIMIT 0
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--echo #
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EXPLAIN
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SELECT * FROM mysql.slow_log WHERE sql_text != 'foo' LIMIT 0;
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SELECT * FROM mysql.slow_log WHERE sql_text != 'foo' LIMIT 0;
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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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SELECT * FROM mysql.help_topic WHERE help_category_id != example LIMIT 0;
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--echo End of 5.5 tests
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