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Fixed range optimzier bug (Bug #1828)

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mysql-test/r/range.result:
  test for range optimzier bug
mysql-test/t/range.test:
  test for range optimzier bug
This commit is contained in:
unknown
2003-11-28 15:45:34 +02:00
parent e56d603a09
commit e5cc604eab
3 changed files with 23 additions and 2 deletions
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10
mysql-test/r/range.result
View File

@ -290,3 +290,13 @@ t1 range a,b a 5 NULL 2 Using where
SELECT * FROM t1 WHERE a IN(1,2) AND b=5; SELECT * FROM t1 WHERE a IN(1,2) AND b=5;
a b a b
DROP TABLE t1; DROP TABLE t1;
CREATE TABLE t1 (a int, b int, c int, INDEX (c,a,b));
INSERT INTO t1 VALUES (1,0,0),(1,0,0),(1,0,0);
INSERT INTO t1 VALUES (0,1,0),(0,1,0),(0,1,0);
SELECT COUNT(*) FROM t1 WHERE (c=0 and a=1) or (c=0 and b=1);
COUNT(*)
6
SELECT COUNT(*) FROM t1 WHERE (c=0 and b=1) or (c=0 and a=1);
COUNT(*)
6
DROP TABLE t1;

13
mysql-test/t/range.test
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@ -231,9 +231,20 @@ INSERT INTO t1 VALUES
(21,4),(22,5),(23,5),(24,5),(25,5),(26,5),(30,5),(31,5),(32,5),(33,5), (21,4),(22,5),(23,5),(24,5),(25,5),(26,5),(30,5),(31,5),(32,5),(33,5),
(33,5),(33,5),(33,5),(33,5),(34,5),(35,5); (33,5),(33,5),(33,5),(33,5),(34,5),(35,5);
# we expect that optimizer will choose index on A
EXPLAIN SELECT * FROM t1 WHERE a IN(1,2) AND b=5; EXPLAIN SELECT * FROM t1 WHERE a IN(1,2) AND b=5;
SELECT * FROM t1 WHERE a IN(1,2) AND b=5; SELECT * FROM t1 WHERE a IN(1,2) AND b=5;
DROP TABLE t1; DROP TABLE t1;
# we expect that optimizer will choose index on A #
# Test error with
#
CREATE TABLE t1 (a int, b int, c int, INDEX (c,a,b));
INSERT INTO t1 VALUES (1,0,0),(1,0,0),(1,0,0);
INSERT INTO t1 VALUES (0,1,0),(0,1,0),(0,1,0);
# -- First reports 3; second reports 6
SELECT COUNT(*) FROM t1 WHERE (c=0 and a=1) or (c=0 and b=1);
SELECT COUNT(*) FROM t1 WHERE (c=0 and b=1) or (c=0 and a=1);
DROP TABLE t1;

2
sql/opt_range.cc
View File

@ -70,7 +70,7 @@ public:
{} {}
inline bool is_same(SEL_ARG *arg) inline bool is_same(SEL_ARG *arg)
{ {
if (type != arg->type) if (type != arg->type || part != arg->part)
return 0; return 0;
if (type != KEY_RANGE) if (type != KEY_RANGE)
return 1; return 1;