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Bug#40953 SELECT query throws "ERROR 1062 (23000): Duplicate entry..." error

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Table could be marked dependent because it is
either 1) an inner table of an outer join, or 2) it is a part of
STRAIGHT_JOIN. In case of STRAIGHT_JOIN table->maybe_null should not
be assigned. The fix is to set st_table::maybe_null to 'true' only
for those tables which are used in outer join.
This commit is contained in:
Sergey Glukhov 2008-12-24 19:24:11 +04:00
parent 026e9c3676
commit a31795b82d
4 changed files with 75 additions and 2 deletions
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33
mysql-test/r/select.result
View File

@ -4355,4 +4355,37 @@ Handler_read_prev 0
Handler_read_rnd 0
Handler_read_rnd_next 6
DROP TABLE t1, t2;
CREATE TABLE t1 (f1 bigint(20) NOT NULL default '0',
f2 int(11) NOT NULL default '0',
f3 bigint(20) NOT NULL default '0',
f4 varchar(255) NOT NULL default '',
PRIMARY KEY (f1),
KEY key1 (f4),
KEY key2 (f2));
CREATE TABLE t2 (f1 int(11) NOT NULL default '0',
f2 enum('A1','A2','A3') NOT NULL default 'A1',
f3 int(11) NOT NULL default '0',
PRIMARY KEY (f1),
KEY key1 (f3));
CREATE TABLE t3 (f1 bigint(20) NOT NULL default '0',
f2 datetime NOT NULL default '1980-01-01 00:00:00',
PRIMARY KEY (f1));
insert into t1 values (1, 1, 1, 'abc');
insert into t1 values (2, 1, 2, 'def');
insert into t1 values (3, 1, 2, 'def');
insert into t2 values (1, 'A1', 1);
insert into t3 values (1, '1980-01-01');
SELECT a.f3, cr.f4, count(*) count
FROM t2 a
STRAIGHT_JOIN t1 cr ON cr.f2 = a.f1
LEFT JOIN
(t1 cr2
JOIN t3 ae2 ON cr2.f3 = ae2.f1
) ON a.f1 = cr2.f2 AND ae2.f2 < now() - INTERVAL 7 DAY AND
cr.f4 = cr2.f4
GROUP BY a.f3, cr.f4;
f3 f4 count
1 abc 1
1 def 2
drop table t1, t2, t3;
End of 5.0 tests

36
mysql-test/t/select.test
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@ -3701,4 +3701,40 @@ SELECT DISTINCT b FROM t1 LEFT JOIN t2 USING(a) WHERE c <= 3;
SHOW STATUS LIKE 'Handler_read%';
DROP TABLE t1, t2;
#
# Bug#40953 SELECT query throws "ERROR 1062 (23000): Duplicate entry..." error
#
CREATE TABLE t1 (f1 bigint(20) NOT NULL default '0',
f2 int(11) NOT NULL default '0',
f3 bigint(20) NOT NULL default '0',
f4 varchar(255) NOT NULL default '',
PRIMARY KEY (f1),
KEY key1 (f4),
KEY key2 (f2));
CREATE TABLE t2 (f1 int(11) NOT NULL default '0',
f2 enum('A1','A2','A3') NOT NULL default 'A1',
f3 int(11) NOT NULL default '0',
PRIMARY KEY (f1),
KEY key1 (f3));
CREATE TABLE t3 (f1 bigint(20) NOT NULL default '0',
f2 datetime NOT NULL default '1980-01-01 00:00:00',
PRIMARY KEY (f1));
insert into t1 values (1, 1, 1, 'abc');
insert into t1 values (2, 1, 2, 'def');
insert into t1 values (3, 1, 2, 'def');
insert into t2 values (1, 'A1', 1);
insert into t3 values (1, '1980-01-01');
SELECT a.f3, cr.f4, count(*) count
FROM t2 a
STRAIGHT_JOIN t1 cr ON cr.f2 = a.f1
LEFT JOIN
(t1 cr2
JOIN t3 ae2 ON cr2.f3 = ae2.f1
) ON a.f1 = cr2.f2 AND ae2.f2 < now() - INTERVAL 7 DAY AND
cr.f4 = cr2.f4
GROUP BY a.f3, cr.f4;
drop table t1, t2, t3;
--echo End of 5.0 tests

2
sql/sql_select.cc
View File

@ -2489,7 +2489,7 @@ make_join_statistics(JOIN *join, TABLE_LIST *tables, COND *conds,
if (s->dependent & table->map)
s->dependent |= table->reginfo.join_tab->dependent;
}
if (s->dependent)
if (outer_join & s->table->map)
s->table->maybe_null= 1;
}
/* Catch illegal cross references for outer joins */

6
sql/sql_select.h
View File

@ -235,7 +235,11 @@ public:
fetching data from a cursor
*/
bool resume_nested_loop;
table_map const_table_map,found_const_table_map,outer_join;
table_map const_table_map,found_const_table_map;
/*
Bitmap of all inner tables from outer joins
*/
table_map outer_join;
ha_rows send_records,found_records,examined_rows,row_limit, select_limit;
/*
Used to fetch no more than given amount of rows per one