Commit 9514ac9f authored by gkodinov/kgeorge@magare.gmz's avatar gkodinov/kgeorge@magare.gmz
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Bug #19372: 

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.
parent 204559cd

mysql-test/r/select.result

+9 −0
Original line number Diff line number Diff line
@@ -3986,4 +3986,13 @@ t2.access_id IN (1,4) AND t.access_id IS NULL AND t2.faq_id in (265); 
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

mysql-test/t/select.test

+13 −0
Original line number Diff line number Diff line
@@ -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