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Manual merge

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configure.in:
  Auto merged
mysql-test/r/null_key.result:
  Auto merged
mysql-test/t/null_key.test:
  Auto merged
sql/sql_select.cc:
  Auto merged
support-files/mysql.spec.sh:
  Auto merged
This commit is contained in:
unknown 2005-07-28 21:28:20 -07:00
commit 48abe1d664
6 changed files with 180 additions and 10 deletions
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45
mysql-test/t/null_key.test
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@ -194,4 +194,49 @@ delete from t1 where id <=> NULL;
select * from t1;
drop table t1;
#
# Test for bug #12144: optimizations for key access with null keys
# used for outer joins
#
CREATE TABLE t1 (a int);
CREATE TABLE t2 (a int, b int, INDEX idx(a));
CREATE TABLE t3 (b int, INDEX idx(b));
CREATE TABLE t4 (b int, INDEX idx(b));
INSERT INTO t1 VALUES (1), (2), (3), (4);
INSERT INTO t2 VALUES (1, 1), (3, 1);
INSERT INTO t3 VALUES
(NULL), (NULL), (NULL), (NULL), (NULL),
(NULL), (NULL), (NULL), (NULL), (NULL);
INSERT INTO t4 SELECT * FROM t3;
INSERT INTO t3 SELECT * FROM t4;
INSERT INTO t4 SELECT * FROM t3;
INSERT INTO t3 SELECT * FROM t4;
INSERT INTO t4 SELECT * FROM t3;
INSERT INTO t3 SELECT * FROM t4;
INSERT INTO t4 SELECT * FROM t3;
INSERT INTO t3 SELECT * FROM t4;
INSERT INTO t4 SELECT * FROM t3;
INSERT INTO t3 SELECT * FROM t4;
INSERT INTO t4 SELECT * FROM t3;
INSERT INTO t3 SELECT * FROM t4;
INSERT INTO t4 SELECT * FROM t3;
INSERT INTO t3 SELECT * FROM t4;
INSERT INTO t4 SELECT * FROM t3;
INSERT INTO t3 SELECT * FROM t4;
INSERT INTO t3 VALUES (2), (3);
ANALYZE table t1, t2, t3;
SELECT COUNT(*) FROM t3;
EXPLAIN SELECT SQL_CALC_FOUND_ROWS * FROM t1 LEFT JOIN t2 ON t1.a=t2.a
LEFT JOIN t3 ON t2.b=t3.b;
FLUSH STATUS ;
SELECT SQL_CALC_FOUND_ROWS * FROM t1 LEFT JOIN t2 ON t1.a=t2.a
LEFT JOIN t3 ON t2.b=t3.b;
SHOW STATUS LIKE "handler_read%";
SELECT FOUND_ROWS();
DROP TABLE t1,t2,t3,t4;
# End of 4.1 tests