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The problem was that during DROP TEMPORARY TABLE we tried to acquire the name lock, though temporary tables belongs to one connection, and no race is possible. The solution is to not use table name locking while executing DROP TEMPORARY TABLE. mysql-test/r/temp_table.result: Add result for bug#21096: locking issue ; temporary table conflicts. mysql-test/t/temp_table.test: Add test case for bug#21096: locking issue ; temporary table conflicts. sql/sql_table.cc: Do not use table name locking while executing DROP TEMPORARY TABLE.
127 lines
3.7 KiB
Text
127 lines
3.7 KiB
Text
drop table if exists t1,t2;
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CREATE TABLE t1 (c int not null, d char (10) not null);
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insert into t1 values(1,""),(2,"a"),(3,"b");
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CREATE TEMPORARY TABLE t1 (a int not null, b char (10) not null);
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insert into t1 values(4,"e"),(5,"f"),(6,"g");
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alter table t1 rename t2;
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select * from t1;
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c d
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1
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2 a
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3 b
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select * from t2;
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a b
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4 e
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5 f
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6 g
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CREATE TABLE t2 (x int not null, y int not null);
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alter table t2 rename t1;
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select * from t1;
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a b
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4 e
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5 f
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6 g
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create TEMPORARY TABLE t2 engine=heap select * from t1;
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create TEMPORARY TABLE IF NOT EXISTS t2 (a int) engine=heap;
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Warnings:
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Note 1050 Table 't2' already exists
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CREATE TEMPORARY TABLE t1 (a int not null, b char (10) not null);
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ERROR 42S01: Table 't1' already exists
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ALTER TABLE t1 RENAME t2;
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ERROR 42S01: Table 't2' already exists
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select * from t2;
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a b
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4 e
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5 f
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6 g
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alter table t2 add primary key (a,b);
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drop table t1,t2;
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select * from t1;
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c d
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1
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2 a
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3 b
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drop table t2;
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create temporary table t1 select *,2 as "e" from t1;
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select * from t1;
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c d e
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1 2
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2 a 2
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3 b 2
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drop table t1;
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drop table t1;
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CREATE TABLE t1 (pkCrash INTEGER PRIMARY KEY,strCrash VARCHAR(255));
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INSERT INTO t1 ( pkCrash, strCrash ) VALUES ( 1, '1');
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SELECT CONCAT_WS(pkCrash, strCrash) FROM t1;
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CONCAT_WS(pkCrash, strCrash)
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1
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drop table t1;
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create temporary table t1 select 1 as 'x';
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drop table t1;
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CREATE TABLE t1 (x INT);
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INSERT INTO t1 VALUES (1), (2), (3);
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CREATE TEMPORARY TABLE tmp SELECT *, NULL FROM t1;
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drop table t1;
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create temporary table t1 (id int(10) not null unique);
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create temporary table t2 (id int(10) not null primary key,
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val int(10) not null);
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insert into t1 values (1),(2),(4);
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insert into t2 values (1,1),(2,1),(3,1),(4,2);
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select one.id, two.val, elt(two.val,'one','two') from t1 one, t2 two where two.id=one.id order by one.id;
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id val elt(two.val,'one','two')
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1 1 one
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2 1 one
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4 2 two
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drop table t1,t2;
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create temporary table t1 (a int not null);
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insert into t1 values (1),(1);
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alter table t1 add primary key (a);
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ERROR 23000: Duplicate entry '1' for key 1
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drop table t1;
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CREATE TABLE t1 (
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d datetime default NULL
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) ENGINE=MyISAM;
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INSERT INTO t1 VALUES ('2002-10-24 14:50:32'),('2002-10-24 14:50:33'),('2002-10-24 14:50:34'),('2002-10-24 14:50:34'),('2002-10-24 14:50:34'),('2002-10-24 14:50:35'),('2002-10-24 14:50:35'),('2002-10-24 14:50:35'),('2002-10-24 14:50:35'),('2002-10-24 14:50:36'),('2002-10-24 14:50:36'),('2002-10-24 14:50:36'),('2002-10-24 14:50:36'),('2002-10-24 14:50:37'),('2002-10-24 14:50:37'),('2002-10-24 14:50:37'),('2002-10-24 14:50:37'),('2002-10-24 14:50:38'),('2002-10-24 14:50:38'),('2002-10-24 14:50:38'),('2002-10-24 14:50:39'),('2002-10-24 14:50:39'),('2002-10-24 14:50:39'),('2002-10-24 14:50:39'),('2002-10-24 14:50:40'),('2002-10-24 14:50:40'),('2002-10-24 14:50:40');
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flush status;
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select * from t1 group by d;
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d
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2002-10-24 14:50:32
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2002-10-24 14:50:33
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2002-10-24 14:50:34
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2002-10-24 14:50:35
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2002-10-24 14:50:36
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2002-10-24 14:50:37
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2002-10-24 14:50:38
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2002-10-24 14:50:39
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2002-10-24 14:50:40
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show status like "created_tmp%tables";
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Variable_name Value
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Created_tmp_disk_tables 0
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Created_tmp_tables 1
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drop table t1;
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create table t1 (a int, b int, index(a), index(b));
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create table t2 (c int auto_increment, d varchar(255), primary key (c));
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insert into t1 values (3,1),(3,2);
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insert into t2 values (NULL, 'foo'), (NULL, 'bar');
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select d, c from t1 left join t2 on b = c where a = 3 order by d;
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d c
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bar 2
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foo 1
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drop table t1, t2;
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DROP TABLE IF EXISTS t1;
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CREATE TABLE t1 (i INT);
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LOCK TABLE t1 WRITE;
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CREATE TEMPORARY TABLE t1 (i INT);
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The following command should not block
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DROP TEMPORARY TABLE t1;
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DROP TABLE t1;
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CREATE TABLE t1 (i INT);
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CREATE TEMPORARY TABLE t2 (i INT);
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DROP TEMPORARY TABLE t2, t1;
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ERROR 42S02: Unknown table 't1'
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SELECT * FROM t2;
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ERROR 42S02: Table 'test.t2' doesn't exist
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SELECT * FROM t1;
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i
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DROP TABLE t1;
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End of 4.1 tests.
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