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A bug with tables with different ref_length's whose order is

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changed in table initialization
This commit is contained in:
Sinisa@sinisa.nasamreza.org 2002-07-31 19:53:06 +03:00
parent 57f32cf816
commit aa7231af18
4 changed files with 72 additions and 13 deletions
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3
Docs/manual.texi
View file

@ -50064,6 +50064,9 @@ Our TODO section contains what we plan to have in 4.0. @xref{TODO MySQL 4.0}.
@itemize @bullet
@item
Fixed bug in multi-table delete when tables are re-ordered in table
initialization method and ref_length's are of different sizes
@item
Fixed bug in query cache initialisation with very small query cache size.
@item
Allow @code{DEFAULT} with @code{INSERT} statement.

30
mysql-test/r/multi_update.result
View file

@ -70,3 +70,33 @@ create table t1(id1 int not null primary key, t varchar(100)) pack_keys = 1;
create table t2(id2 int not null, t varchar(100), index(id2)) pack_keys = 1;
delete t1 from t1,t2 where t1.id1 = t2.id2 and t1.id1 > 500;
drop table t1,t2;
DROP TABLE IF EXISTS a,b,c;
CREATE TABLE a (
id int(11) NOT NULL default '0',
name varchar(10) default NULL,
PRIMARY KEY (id)
) TYPE=MyISAM;
INSERT INTO a VALUES (1,'aaa'),(2,'aaa'),(3,'aaa');
CREATE TABLE b (
id int(11) NOT NULL default '0',
name varchar(10) default NULL,
PRIMARY KEY (id)
) TYPE=MyISAM;
INSERT INTO b VALUES (2,'bbb'),(3,'bbb'),(4,'bbb');
CREATE TABLE c (
id int(11) NOT NULL default '0',
mydate datetime default NULL,
PRIMARY KEY (id)
) TYPE=MyISAM;
INSERT INTO c VALUES (1,'2002-02-04 00:00:00'),(3,'2002-05-12 00:00:00'),(5,'2002-05-12 00:00:00'),(6,'2002-06-22
00:00:00'),(7,'2002-07-22 00:00:00');
delete a,b,c from a,b,c
where to_days(now())-to_days(c.mydate)>=30
and c.id=a.id and c.id=b.id;
select * from c;
id mydate
1 2002-02-04 00:00:00
5 2002-05-12 00:00:00
6 2002-06-22 00:00:00
7 2002-07-22 00:00:00
DROP TABLE IF EXISTS a,b,c;

25
mysql-test/t/multi_update.test
View file

@ -80,3 +80,28 @@ while ($1)
enable_query_log;
delete t1 from t1,t2 where t1.id1 = t2.id2 and t1.id1 > 500;
drop table t1,t2;
DROP TABLE IF EXISTS a,b,c;
CREATE TABLE a (
id int(11) NOT NULL default '0',
name varchar(10) default NULL,
PRIMARY KEY (id)
) TYPE=MyISAM;
INSERT INTO a VALUES (1,'aaa'),(2,'aaa'),(3,'aaa');
CREATE TABLE b (
id int(11) NOT NULL default '0',
name varchar(10) default NULL,
PRIMARY KEY (id)
) TYPE=MyISAM;
INSERT INTO b VALUES (2,'bbb'),(3,'bbb'),(4,'bbb');
CREATE TABLE c (
id int(11) NOT NULL default '0',
mydate datetime default NULL,
PRIMARY KEY (id)
) TYPE=MyISAM;
INSERT INTO c VALUES (1,'2002-02-04 00:00:00'),(3,'2002-05-12 00:00:00'),(5,'2002-05-12 00:00:00'),(6,'2002-06-22
00:00:00'),(7,'2002-07-22 00:00:00');
delete a,b,c from a,b,c
where to_days(now())-to_days(c.mydate)>=30
and c.id=a.id and c.id=b.id;
select * from c;
DROP TABLE IF EXISTS a,b,c;

27
sql/sql_delete.cc
View file

@ -215,21 +215,8 @@ multi_delete::multi_delete(THD *thd_arg, TABLE_LIST *dt,
num_of_tables(num_of_tables_arg), error(0), lock_option(lock_option_arg),
do_delete(false)
{
uint counter=0;
not_trans_safe=false;
tempfiles = (Unique **) sql_calloc(sizeof(Unique *) * (num_of_tables-1));
/* Don't use key read with MULTI-TABLE-DELETE */
dt->table->used_keys=0;
for (dt=dt->next ; dt ; dt=dt->next,counter++)
{
TABLE *table=dt->table;
table->used_keys=0;
tempfiles[counter] = new Unique (refposcmp2,
(void *) &table->file->ref_length,
table->file->ref_length,
MEM_STRIP_BUF_SIZE);
}
}
@ -260,6 +247,7 @@ multi_delete::prepare(List<Item> &values)
void
multi_delete::initialize_tables(JOIN *join)
{
int counter=0;
TABLE_LIST *walk;
table_map tables_to_delete_from=0;
for (walk= delete_tables ; walk ; walk=walk->next)
@ -281,6 +269,19 @@ multi_delete::initialize_tables(JOIN *join)
not_trans_safe=true;
}
}
walk= delete_tables;
walk->table->used_keys=0;
for (walk=walk->next ; walk ; walk=walk->next, counter++)
{
tables_to_delete_from|= walk->table->map;
TABLE *table=walk->table;
/* Don't use key read with MULTI-TABLE-DELETE */
table->used_keys=0;
tempfiles[counter] = new Unique (refposcmp2,
(void *) &table->file->ref_length,
table->file->ref_length,
MEM_STRIP_BUF_SIZE);
}
init_ftfuncs(thd,1);
}