bk commit into 5.0 tree (gkodinov:1.2435) BUG#18940

[kgeorge]

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ChangeSet@stripped, 2007-04-10 19:04:41+03:00, gkodinov@stripped +2 -0
  Bug #18940:
  Added a test case.
  The problem was fixed by the fix for bug #17379.
  The problem was that because of some conditions 
  the optimizer always preferred range or full index
  scan access methods to lookup access methods even
  when the latter were much cheaper.

  mysql-test/r/select.result@stripped, 2007-04-10 19:04:40+03:00, gkodinov@stripped +9 -0
    Bug #19372: test case.
    The problem was fixed by the patch for bug #17379

  mysql-test/t/select.test@stripped, 2007-04-10 19:04:40+03:00, gkodinov@stripped +13 -0
    Bug #19372: test case.
    The problem was fixed by the patch for bug #17379

# This is a BitKeeper patch.  What follows are the unified diffs for the
# set of deltas contained in the patch.  The rest of the patch, the part
# that BitKeeper cares about, is below these diffs.
# User:	gkodinov
# Host:	magare.gmz
# Root:	/home/kgeorge/mysql/work/B19372-5.0-opt

--- 1.154/mysql-test/r/select.result	2007-03-26 16:52:51 +03:00
+++ 1.155/mysql-test/r/select.result	2007-04-10 19:04:40 +03:00
@@ -3986,4 +3986,13 @@ t2.access_id IN (1,4) AND t.access_id IS
 faq_id
 265
 DROP TABLE t1,t2;
+CREATE TABLE t1 (a INT, b INT, KEY inx (b,a));
+INSERT INTO t1 VALUES (1,1), (1,2), (1,3), (1,4), (1,5), (1, 6), (1,7);
+EXPLAIN SELECT COUNT(*) FROM t1 f1 INNER JOIN t1 f2
+ON ( f1.b=f2.b AND f1.a<f2.a ) 
+WHERE 1 AND f1.b NOT IN (100,2232,3343,51111);
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	f1	index	inx	inx	10	NULL	7	Using where; Using index
+1	SIMPLE	f2	ref	inx	inx	5	test.f1.b	1	Using where; Using index
+DROP TABLE t1;
 End of 5.0 tests

--- 1.128/mysql-test/t/select.test	2007-03-26 16:52:51 +03:00
+++ 1.129/mysql-test/t/select.test	2007-04-10 19:04:40 +03:00
@@ -3357,4 +3357,17 @@ SELECT t2.faq_id 
 
 DROP TABLE t1,t2;
 
+
+#
+# Bug #19372: Optimizer does not use index anymore when WHERE index NOT IN
+# () is added
+#
+CREATE TABLE t1 (a INT, b INT, KEY inx (b,a));
+
+INSERT INTO t1 VALUES (1,1), (1,2), (1,3), (1,4), (1,5), (1, 6), (1,7);
+EXPLAIN SELECT COUNT(*) FROM t1 f1 INNER JOIN t1 f2
+    ON ( f1.b=f2.b AND f1.a<f2.a ) 
+    WHERE 1 AND f1.b NOT IN (100,2232,3343,51111);
+DROP TABLE t1;    
+
 --echo End of 5.0 tests