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Bug#14400 - Query joins wrong rows from table which is subject of

Browse Source 
"concurrent insert"
Additional fix for full keys and test case.


myisam/mi_rkey.c:
  Bug#14400 - Query joins wrong rows from table which is subject of
              "concurrent insert"
  Additional fix for full keys.
mysql-test/r/myisam.result:
  Bug#14400 - Query joins wrong rows from table which is subject of
              "concurrent insert"
  Additional results.
mysql-test/t/myisam.test:
  Bug#14400 - Query joins wrong rows from table which is subject of
              "concurrent insert"
  Additional test case.
This commit is contained in:
unknown
2006-09-07 15:39:31 +02:00
parent 7d600f7131
commit 71314617ae
3 changed files with 53 additions and 16 deletions
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36
myisam/mi_rkey.c
View File

@ -78,24 +78,18 @@ int mi_rkey(MI_INFO *info, byte *buf, int inx, const byte *key, uint key_len,
if (!_mi_search(info,keyinfo, key_buff, use_key_length,
myisam_read_vec[search_flag], info->s->state.key_root[inx]))
{
if (info->lastpos >= info->state->data_file_length)
/*
If we searching for a partial key (or using >, >=, < or <=) and
the data is outside of the data file, we need to continue searching
for the first key inside the data file
*/
if (info->lastpos >= info->state->data_file_length &&
(search_flag != HA_READ_KEY_EXACT ||
last_used_keyseg != keyinfo->seg + keyinfo->keysegs))
{
do
{
uint not_used;
/*
If we are searching for an exact key, abort if we find a bigger
key.
*/
if (search_flag == HA_READ_KEY_EXACT &&
(use_key_length == USE_WHOLE_KEY ||
_mi_key_cmp(keyinfo->seg, key_buff, info->lastkey, use_key_length,
SEARCH_FIND, &not_used)))
{
my_errno= HA_ERR_END_OF_FILE;
info->lastpos= HA_OFFSET_ERROR;
break;
}
/*
Skip rows that are inserted by other threads since we got a lock
Note that this can only happen if we are not searching after an
@ -107,8 +101,20 @@ int mi_rkey(MI_INFO *info, byte *buf, int inx, const byte *key, uint key_len,
myisam_readnext_vec[search_flag],
info->s->state.key_root[inx]))
break;
/*
Check that the found key does still match the search.
_mi_search_next() delivers the next key regardless of its
value.
*/
if (search_flag == HA_READ_KEY_EXACT &&
_mi_key_cmp(keyinfo->seg, key_buff, info->lastkey, use_key_length,
SEARCH_FIND, &not_used))
{
my_errno= HA_ERR_KEY_NOT_FOUND;
info->lastpos= HA_OFFSET_ERROR;
break;
}
while (info->lastpos >= info->state->data_file_length);
} while (info->lastpos >= info->state->data_file_length);
}
}
if (share->concurrent_insert)

13
mysql-test/r/myisam.result
View File

@ -487,3 +487,16 @@ a a b
1 1 1
2 2 1
drop table t1,t2;
CREATE TABLE t1 (c1 varchar(250) NOT NULL);
CREATE TABLE t2 (c1 varchar(250) NOT NULL, PRIMARY KEY (c1));
INSERT INTO t1 VALUES ('test000001'), ('test000002'), ('test000003');
INSERT INTO t2 VALUES ('test000002'), ('test000003'), ('test000004');
LOCK TABLES t1 READ LOCAL, t2 READ LOCAL;
SELECT t1.c1 AS t1c1, t2.c1 AS t2c1 FROM t1, t2
WHERE t1.c1 = t2.c1 HAVING t1c1 != t2c1;
t1c1 t2c1
INSERT INTO t2 VALUES ('test000001'), ('test000005');
SELECT t1.c1 AS t1c1, t2.c1 AS t2c1 FROM t1, t2
WHERE t1.c1 = t2.c1 HAVING t1c1 != t2c1;
t1c1 t2c1
DROP TABLE t1,t2;

18
mysql-test/t/myisam.test
View File

@ -461,6 +461,7 @@ drop table t1;
#
# Bug #14400 Join could miss concurrently inserted row
#
# Partial key.
create table t1 (a int not null, primary key(a));
create table t2 (a int not null, b int not null, primary key(a,b));
insert into t1 values (1),(2),(3),(4),(5),(6);
@ -473,5 +474,22 @@ disconnect root;
connection default;
select straight_join * from t1,t2 force index (primary) where t1.a=t2.a;
drop table t1,t2;
#
# Full key.
CREATE TABLE t1 (c1 varchar(250) NOT NULL);
CREATE TABLE t2 (c1 varchar(250) NOT NULL, PRIMARY KEY (c1));
INSERT INTO t1 VALUES ('test000001'), ('test000002'), ('test000003');
INSERT INTO t2 VALUES ('test000002'), ('test000003'), ('test000004');
LOCK TABLES t1 READ LOCAL, t2 READ LOCAL;
SELECT t1.c1 AS t1c1, t2.c1 AS t2c1 FROM t1, t2
WHERE t1.c1 = t2.c1 HAVING t1c1 != t2c1;
connect (con1,localhost,root,,);
connection con1;
INSERT INTO t2 VALUES ('test000001'), ('test000005');
disconnect con1;
connection default;
SELECT t1.c1 AS t1c1, t2.c1 AS t2c1 FROM t1, t2
WHERE t1.c1 = t2.c1 HAVING t1c1 != t2c1;
DROP TABLE t1,t2;
# end of 4.0 tests