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mysql_priv.h:

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Fixed bug #12154: a query returned: Column <name> cannot be null.
  The problem was due to a bug in the function setup_table_map:
  the flag maybe_null was set up incorrectly for inner tables of
  nested outer joins.
join_nested.result, join_nested.test:
  Added a test case for bug #12154.
This commit is contained in:
igor@rurik.mysql.com
2005-08-05 16:43:35 -07:00
parent 56b91a8c15
commit 73db3fdf46
3 changed files with 109 additions and 0 deletions
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55
mysql-test/r/join_nested.result
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@ -1343,3 +1343,58 @@ id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t2 ALL NULL NULL NULL NULL 0
1 SIMPLE t3 ALL NULL NULL NULL NULL 0
DROP TABLE t1,t2,t3;
CREATE TABLE t1 (goods int(12) NOT NULL, price varchar(128) NOT NULL);
INSERT INTO t1 VALUES (23, 2340), (26, 9900);
CREATE TABLE t2 (goods int(12), name varchar(50), shop char(2));
INSERT INTO t2 VALUES (23, 'as300', 'fr'), (26, 'as600', 'fr');
create table t3 (groupid int(12) NOT NULL, goodsid int(12) NOT NULL);
INSERT INTO t3 VALUES (3,23), (6,26);
CREATE TABLE t4 (groupid int(12));
INSERT INTO t4 VALUES (1), (2), (3), (4), (5), (6);
SELECT * FROM
(SELECT DISTINCT gl.groupid, gp.price
FROM t4 gl
LEFT JOIN
(t3 g INNER JOIN t2 p ON g.goodsid = p.goods
INNER JOIN t1 gp ON p.goods = gp.goods)
ON gl.groupid = g.groupid and p.shop = 'fr') t;
groupid price
1 NULL
2 NULL
3 2340
4 NULL
5 NULL
6 9900
CREATE VIEW v1 AS
SELECT g.groupid groupid, p.goods goods,
p.name name, p.shop shop,
gp.price price
FROM t3 g INNER JOIN t2 p ON g.goodsid = p.goods
INNER JOIN t1 gp on p.goods = gp.goods;
CREATE VIEW v2 AS
SELECT DISTINCT g.groupid, fr.price
FROM t4 g
LEFT JOIN
v1 fr on g.groupid = fr.groupid and fr.shop = 'fr';
SELECT * FROM v2;
groupid price
1 NULL
2 NULL
3 2340
4 NULL
5 NULL
6 9900
SELECT * FROM
(SELECT DISTINCT g.groupid, fr.price
FROM t4 g
LEFT JOIN
v1 fr on g.groupid = fr.groupid and fr.shop = 'fr') t;
groupid price
1 NULL
2 NULL
3 2340
4 NULL
5 NULL
6 9900
DROP VIEW v1,v2;
DROP TABLE t1,t2,t3,t4;