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Fixed bug #37004.

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The value of JOIN::tables must be set to 0 when there
is no matching min/max row.
This commit is contained in:
Tatiana A. Nurnberg
2008-06-19 05:08:41 +02:00
parent 69662273cc
commit d6c476b8c8
3 changed files with 21 additions and 0 deletions
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7
mysql-test/r/subselect.result
View File

@ -4391,3 +4391,10 @@ SELECT * FROM t1 WHERE _utf8'a' = ANY (SELECT s1 FROM t1);
s1 s1
a a
DROP TABLE t1; DROP TABLE t1;
CREATE TABLE t1(c int, KEY(c));
CREATE TABLE t2(a int, b int);
INSERT INTO t2 VALUES (1, 10), (2, NULL);
INSERT INTO t1 VALUES (1), (3);
SELECT * FROM t2 WHERE b NOT IN (SELECT max(t.c) FROM t1, t1 t WHERE t.c>10);
a b
DROP TABLE t1,t2;

12
mysql-test/t/subselect.test
View File

@ -3273,3 +3273,15 @@ INSERT INTO t1 VALUES ('a');
SELECT * FROM t1 WHERE _utf8'a' = ANY (SELECT s1 FROM t1); SELECT * FROM t1 WHERE _utf8'a' = ANY (SELECT s1 FROM t1);
DROP TABLE t1; DROP TABLE t1;
#
# Bug #37004: NOT IN subquery with MAX over an empty set
#
CREATE TABLE t1(c int, KEY(c));
CREATE TABLE t2(a int, b int);
INSERT INTO t2 VALUES (1, 10), (2, NULL);
INSERT INTO t1 VALUES (1), (3);
SELECT * FROM t2 WHERE b NOT IN (SELECT max(t.c) FROM t1, t1 t WHERE t.c>10);
DROP TABLE t1,t2;

2
sql/sql_select.cc
View File

@ -888,6 +888,7 @@ JOIN::optimize()
{ {
DBUG_PRINT("info",("No matching min/max row")); DBUG_PRINT("info",("No matching min/max row"));
zero_result_cause= "No matching min/max row"; zero_result_cause= "No matching min/max row";
tables= 0;
error=0; error=0;
DBUG_RETURN(0); DBUG_RETURN(0);
} }
@ -901,6 +902,7 @@ JOIN::optimize()
{ {
DBUG_PRINT("info",("No matching min/max row")); DBUG_PRINT("info",("No matching min/max row"));
zero_result_cause= "No matching min/max row"; zero_result_cause= "No matching min/max row";
tables= 0;
error=0; error=0;
DBUG_RETURN(0); DBUG_RETURN(0);
} }