Addemdum for bug #685952.

Also:
Changed the value of TIME_FOR_COMPARE_ROWID to make it the same as for MWL 21.
Changed some queries in range_vs_index_merge.test to make them generate
the same plans as earlier.

mysql-test/include/index_merge1.inc

@@ -194,7 +194,7 @@ alter table t2 add index i321(key3, key2, key1);
 explain select key3 from t2 where key1 = 100 or key2 = 100;
 
 #   index_merge vs 'index', 'index' is better.
-explain select key3 from t2 where key1 <100 or key2 < 100;
+explain select key3 from t2 where key1 < 500 or key2 < 500;
 
 #   index_merge vs 'all', index_merge is better.
 explain select key7 from t2 where key1 <100 or key2 < 100;

mysql-test/r/index_merge_myisam.result

@@ -203,12 +203,12 @@ alter table t2 add index i321(key3, key2, key1);
 explain select key3 from t2 where key1 = 100 or key2 = 100;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	SIMPLE	t2	index_merge	i1_3,i2_3	i1_3,i2_3	4,4	NULL	2	Using sort_union(i1_3,i2_3); Using where
-explain select key3 from t2 where key1 <100 or key2 < 100;
+explain select key3 from t2 where key1 < 500 or key2 < 500;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	SIMPLE	t2	index	i1_3,i2_3	i321	12	NULL	1024	Using where; Using index
 explain select key7 from t2 where key1 <100 or key2 < 100;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t2	ALL	i1_3,i2_3	NULL	NULL	NULL	1024	Using where
+1	SIMPLE	t2	index_merge	i1_3,i2_3	i1_3,i2_3	4,4	NULL	188	Using sort_union(i1_3,i2_3); Using where
 create table t4 (
 key1a int not null,
 key1b int not null,

mysql-test/r/range_vs_index_merge.result

@@ -71,9 +71,9 @@ id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	SIMPLE	City	range	Population	Population	4	NULL	459	Using where
 EXPLAIN 
 SELECT * FROM City
-WHERE (Population > 101000 AND Population < 103000);
+WHERE (Population > 101000 AND Population < 102000);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	City	range	Population	Population	4	NULL	81	Using where
+1	SIMPLE	City	range	Population	Population	4	NULL	39	Using where
 EXPLAIN 
 SELECT * FROM City
 WHERE ((Name > 'Ca' AND Name < 'Cf') OR (Country > 'E' AND Country < 'F'));
@@ -88,9 +88,9 @@ id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 EXPLAIN 
 SELECT * FROM City
 WHERE ((Name > 'Ca' AND Name < 'Cf') OR (Country > 'E' AND Country < 'F'))
-AND (Population > 101000 AND Population < 103000);
+AND (Population > 101000 AND Population < 102000);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	City	range	Population,Country,Name	Population	4	NULL	81	Using where
+1	SIMPLE	City	range	Population,Country,Name	Population	4	NULL	39	Using where
 SELECT * FROM City USE INDEX ()
 WHERE ((Name > 'Ca' AND Name < 'Cf') OR (Country > 'E' AND Country < 'F'))
 AND (Population > 101000 AND Population < 115000);
@@ -153,24 +153,20 @@ ID	Name	Country	Population
 4032	Cambridge	USA	101355
 SELECT * FROM City USE INDEX ()
 WHERE ((Name > 'Ca' AND Name < 'Cf') OR (Country > 'E' AND Country < 'F'))
-AND (Population > 101000 AND Population < 103000);
+AND (Population > 101000 AND Population < 102000);
 ID	Name	Country	Population
 637	Mit Ghamr	EGY	101801
 707	Marbella	ESP	101144
-3411	Ceyhan	TUR	102412
 3792	Tartu	EST	101246
-4027	Cape Coral	USA	102286
 4032	Cambridge	USA	101355
 SELECT * FROM City
 WHERE ((Name > 'Ca' AND Name < 'Cf') OR (Country > 'E' AND Country < 'F'))
-AND (Population > 101000 AND Population < 103000);
+AND (Population > 101000 AND Population < 102000);
 ID	Name	Country	Population
 707	Marbella	ESP	101144
 3792	Tartu	EST	101246
 4032	Cambridge	USA	101355
 637	Mit Ghamr	EGY	101801
-4027	Cape Coral	USA	102286
-3411	Ceyhan	TUR	102412
 EXPLAIN
 SELECT  * FROM City WHERE (Name < 'Ac');
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
@@ -328,15 +324,15 @@ ID	Name	Country	Population
 1003	Pemalang	IDN	103500
 2663	Río Bravo	MEX	103901
 EXPLAIN
-SELECT * FROM City WHERE (ID < 50) OR (ID BETWEEN 100 AND 110);
+SELECT * FROM City WHERE (ID < 10) OR (ID BETWEEN 100 AND 110);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	City	range	PRIMARY	PRIMARY	4	NULL	61	Using where
+1	SIMPLE	City	range	PRIMARY	PRIMARY	4	NULL	21	Using where
 EXPLAIN
-SELECT * FROM City WHERE (ID < 200) OR (ID BETWEEN 300 AND 600);
+SELECT * FROM City WHERE (ID < 200) OR (ID BETWEEN 100 AND 200);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	City	range	PRIMARY	PRIMARY	4	NULL	501	Using where
+1	SIMPLE	City	range	PRIMARY	PRIMARY	4	NULL	201	Using where
 EXPLAIN
-SELECT * FROM City WHERE (ID < 600) OR (ID BETWEEN 900 AND 1800);
+SELECT * FROM City WHERE (ID < 600) OR (ID BETWEEN 900 AND 1500);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	SIMPLE	City	ALL	PRIMARY	NULL	NULL	NULL	4079	Using where
 EXPLAIN
@@ -353,27 +349,27 @@ id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	SIMPLE	City	range	Name	Name	35	NULL	72	Using where
 EXPLAIN
 SELECT * FROM City
-WHERE ((ID < 50) AND (Name LIKE 'H%' OR (Country > 'A' AND Country < 'ARG')))
+WHERE ((ID < 10) AND (Name LIKE 'H%' OR (Country > 'A' AND Country < 'ARG')))
 OR ((ID BETWEEN 100 AND 110) AND 
 (Name LIKE 'P%' OR (Population > 103000 AND Population < 104000)));
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	City	range	PRIMARY,Population,Country,Name	PRIMARY	4	NULL	61	Using where
+1	SIMPLE	City	range	PRIMARY,Population,Country,Name	PRIMARY	4	NULL	21	Using where
 EXPLAIN
 SELECT * FROM City
 WHERE ((ID < 800) AND (Name LIKE 'Ha%' OR (Country > 'A' AND Country < 'ARG')))
-OR ((ID BETWEEN 900 AND 1800) AND 
+OR ((ID BETWEEN 900 AND 1500) AND 
 (Name LIKE 'Pa%' OR (Population > 103000 AND Population < 104000)));
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	SIMPLE	City	index_merge	PRIMARY,Population,Country,Name	Name,Country,Population	35,3,4	NULL	128	Using sort_union(Name,Country,Population); Using where
 EXPLAIN
 SELECT * FROM City
-WHERE ((ID < 600) AND (Name LIKE 'Ha%' OR (Country > 'A' AND Country < 'ARG')))
-OR ((ID BETWEEN 300 AND 600) AND 
+WHERE ((ID < 200) AND (Name LIKE 'Ha%' OR (Country > 'A' AND Country < 'ARG')))
+OR ((ID BETWEEN 100 AND 200) AND 
 (Name LIKE 'Pa%' OR (Population > 103000 AND Population < 104000)));
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	SIMPLE	City	index_merge	PRIMARY,Population,Country,Name	Name,Country,Population	35,3,4	NULL	128	Using sort_union(Name,Country,Population); Using where
 SELECT * FROM City USE INDEX ()
-WHERE ((ID < 50) AND (Name LIKE 'H%' OR (Country > 'A' AND Country < 'ARG')))
+WHERE ((ID < 10) AND (Name LIKE 'H%' OR (Country > 'A' AND Country < 'ARG')))
 OR ((ID BETWEEN 100 AND 110) AND 
 (Name LIKE 'P%' OR (Population > 103000 AND Population < 104000)));
 ID	Name	Country	Population
@@ -382,15 +378,10 @@ ID	Name	Country	Population
 3	Herat	AFG	186800
 4	Mazar-e-Sharif	AFG	127800
 7	Haag	NLD	440900
-16	Haarlem	NLD	148772
-25	Haarlemmermeer	NLD	110722
-31	Heerlen	NLD	95052
-33	Willemstad	ANT	2345
-34	Tirana	ALB	270000
 100	Paraná	ARG	207041
 102	Posadas	ARG	201273
 SELECT * FROM City
-WHERE ((ID < 50) AND (Name LIKE 'H%' OR (Country > 'A' AND Country < 'ARG')))
+WHERE ((ID < 10) AND (Name LIKE 'H%' OR (Country > 'A' AND Country < 'ARG')))
 OR ((ID BETWEEN 100 AND 110) AND 
 (Name LIKE 'P%' OR (Population > 103000 AND Population < 104000)));
 ID	Name	Country	Population
@@ -399,16 +390,11 @@ ID	Name	Country	Population
 3	Herat	AFG	186800
 4	Mazar-e-Sharif	AFG	127800
 7	Haag	NLD	440900
-16	Haarlem	NLD	148772
-25	Haarlemmermeer	NLD	110722
-31	Heerlen	NLD	95052
-33	Willemstad	ANT	2345
-34	Tirana	ALB	270000
 100	Paraná	ARG	207041
 102	Posadas	ARG	201273
 SELECT * FROM City USE INDEX()
 WHERE ((ID < 800) AND (Name LIKE 'Ha%' OR (Country > 'A' AND Country < 'ARG')))
-OR ((ID BETWEEN 900 AND 1800) AND 
+OR ((ID BETWEEN 900 AND 1500) AND 
 (Name LIKE 'Pa%' OR (Population > 103000 AND Population < 104000)));
 ID	Name	Country	Population
 1	Kabul	AFG	1780000
@@ -463,13 +449,9 @@ ID	Name	Country	Population
 1468	Palermo	ITA	683794
 1478	Padova	ITA	211391
 1484	Parma	ITA	168717
-1530	Kingston	JAM	103962
-1747	Toda	JPN	103969
-1748	Tajimi	JPN	103171
-1785	Ibb	YEM	103300
 SELECT * FROM City
 WHERE ((ID < 800) AND (Name LIKE 'Ha%' OR (Country > 'A' AND Country < 'ARG')))
-OR ((ID BETWEEN 900 AND 1800) AND 
+OR ((ID BETWEEN 900 AND 1500) AND 
 (Name LIKE 'Pa%' OR (Population > 103000 AND Population < 104000)));
 ID	Name	Country	Population
 1	Kabul	AFG	1780000
@@ -524,13 +506,9 @@ ID	Name	Country	Population
 1468	Palermo	ITA	683794
 1478	Padova	ITA	211391
 1484	Parma	ITA	168717
-1530	Kingston	JAM	103962
-1747	Toda	JPN	103969
-1748	Tajimi	JPN	103171
-1785	Ibb	YEM	103300
 SELECT * FROM City USE INDEX ()
 WHERE ((ID < 200) AND (Name LIKE 'Ha%' OR (Country > 'A' AND Country < 'ARG')))
-OR ((ID BETWEEN 300 AND 600) AND 
+OR ((ID BETWEEN 100 AND 200) AND 
 (Name LIKE 'Pa%' OR (Population > 103000 AND Population < 104000)));
 ID	Name	Country	Population
 1	Kabul	AFG	1780000
@@ -555,25 +533,15 @@ ID	Name	Country	Population
 66	Sharja	ARE	320095
 67	al-Ayn	ARE	225970
 68	Ajman	ARE	114395
+100	Paraná	ARG	207041
 129	Oranjestad	ABW	29034
+167	Jamalpur	BGD	103556
+168	Pabna	BGD	103277
+189	Parakou	BEN	103577
 191	Hamilton	BMU	1200
-339	Passo Fundo	BRA	166343
-364	Parnaíba	BRA	129756
-372	Paranaguá	BRA	126076
-379	Palmas	BRA	121919
-386	Patos de Minas	BRA	119262
-411	Guaratinguetá	BRA	103433
-412	Cachoeirinha	BRA	103240
-413	Codó	BRA	103153
-424	Passos	BRA	98570
-430	Paulo Afonso	BRA	97291
-435	Parnamirim	BRA	96210
-448	Patos	BRA	90519
-451	Palhoça	BRA	89465
-517	Oldham	GBR	103931
 SELECT * FROM City
 WHERE ((ID < 200) AND (Name LIKE 'Ha%' OR (Country > 'A' AND Country < 'ARG')))
-OR ((ID BETWEEN 300 AND 600) AND 
+OR ((ID BETWEEN 100 AND 200) AND 
 (Name LIKE 'Pa%' OR (Population > 103000 AND Population < 104000)));
 ID	Name	Country	Population
 1	Kabul	AFG	1780000
@@ -598,22 +566,12 @@ ID	Name	Country	Population
 66	Sharja	ARE	320095
 67	al-Ayn	ARE	225970
 68	Ajman	ARE	114395
+100	Paraná	ARG	207041
 129	Oranjestad	ABW	29034
+167	Jamalpur	BGD	103556
+168	Pabna	BGD	103277
+189	Parakou	BEN	103577
 191	Hamilton	BMU	1200
-339	Passo Fundo	BRA	166343
-364	Parnaíba	BRA	129756
-372	Paranaguá	BRA	126076
-379	Palmas	BRA	121919
-386	Patos de Minas	BRA	119262
-411	Guaratinguetá	BRA	103433
-412	Cachoeirinha	BRA	103240
-413	Codó	BRA	103153
-424	Passos	BRA	98570
-430	Paulo Afonso	BRA	97291
-435	Parnamirim	BRA	96210
-448	Patos	BRA	90519
-451	Palhoça	BRA	89465
-517	Oldham	GBR	103931
 EXPLAIN 
 SELECT * FROM City WHERE Population > 101000 AND Population < 102000;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
@@ -734,6 +692,10 @@ SELECT * FROM City WHERE Country='USA';
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	SIMPLE	City	ref	Country,CountryPopulation	Country	3	const	267	Using where
 EXPLAIN
+SELECT * FROM City WHERE Country='FIN';
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	City	ref	Country,CountryPopulation	Country	3	const	6	Using where
+EXPLAIN
 SELECT * FROM City 
 WHERE ((Population > 101000 AND Population < 103000) OR Name LIKE 'Pas%')
 AND Country='USA';
@@ -742,9 +704,9 @@ id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 EXPLAIN
 SELECT * FROM City 
 WHERE ((Population > 101000 AND Population < 103000) OR Name LIKE 'P%')
-AND Country='USA';
+AND Country='FIN';
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	City	ref	Population,Country,Name,CountryPopulation	Country	3	const	267	Using where
+1	SIMPLE	City	ref	Population,Country,Name,CountryPopulation	Country	3	const	6	Using where
 SELECT * FROM City 
 WHERE ((Population > 101000 AND Population < 103000) OR Name LIKE 'Pas%')
 AND Country='USA';
@@ -779,72 +741,22 @@ ID	Name	Country	Population
 4032	Cambridge	USA	101355
 SELECT * FROM City 
 WHERE ((Population > 101000 AND Population < 103000) OR Name LIKE 'P%')
-AND Country='USA';
+AND Country='FIN';
 ID	Name	Country	Population
-3797	Philadelphia	USA	1517550
-3798	Phoenix	USA	1321045
-3820	Portland	USA	529121
-3844	Pittsburgh	USA	334563
-3870	Plano	USA	222030
-3912	Providence	USA	173618
-3930	Pomona	USA	149473
-3932	Paterson	USA	149222
-3943	Pasadena	USA	141674
-3951	Pembroke Pines	USA	137427
-3953	Pasadena	USA	133936
-3967	Paradise	USA	124682
-3986	Palmdale	USA	116670
-3996	Peoria	USA	112936
-4007	Peoria	USA	108364
-4016	Provo	USA	105166
-4023	Gary	USA	102746
-4024	Berkeley	USA	102743
-4025	Santa Clara	USA	102361
-4026	Green Bay	USA	102313
-4027	Cape Coral	USA	102286
-4028	Arvada	USA	102153
-4029	Pueblo	USA	102121
-4030	Sandy	USA	101853
-4031	Athens-Clarke County	USA	101489
-4032	Cambridge	USA	101355
-4035	Portsmouth	USA	100565
 SELECT * FROM City USE INDEX ()
 WHERE ((Population > 101000 AND Population < 103000) OR Name LIKE 'P%')
-AND Country='USA';
+AND Country='FIN';
 ID	Name	Country	Population
-3797	Philadelphia	USA	1517550
-3798	Phoenix	USA	1321045
-3820	Portland	USA	529121
-3844	Pittsburgh	USA	334563
-3870	Plano	USA	222030
-3912	Providence	USA	173618
-3930	Pomona	USA	149473
-3932	Paterson	USA	149222
-3943	Pasadena	USA	141674
-3951	Pembroke Pines	USA	137427
-3953	Pasadena	USA	133936
-3967	Paradise	USA	124682
-3986	Palmdale	USA	116670
-3996	Peoria	USA	112936
-4007	Peoria	USA	108364
-4016	Provo	USA	105166
-4023	Gary	USA	102746
-4024	Berkeley	USA	102743
-4025	Santa Clara	USA	102361
-4026	Green Bay	USA	102313
-4027	Cape Coral	USA	102286
-4028	Arvada	USA	102153
-4029	Pueblo	USA	102121
-4030	Sandy	USA	101853
-4031	Athens-Clarke County	USA	101489
-4032	Cambridge	USA	101355
-4035	Portsmouth	USA	100565
 CREATE INDEX CountryName ON City(Country,Name);
 EXPLAIN
 SELECT * FROM City WHERE Country='USA';
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	SIMPLE	City	ref	Country,CountryPopulation,CountryName	Country	3	const	267	Using where
 EXPLAIN
+SELECT * FROM City WHERE Country='FIN';
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	City	ref	Country,CountryPopulation,CountryName	CountryName	3	const	5	Using where
+EXPLAIN
 SELECT * FROM City WHERE Country='BRA';
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	SIMPLE	City	ref	Country,CountryPopulation,CountryName	CountryName	3	const	221	Using where
@@ -901,10 +813,10 @@ id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 EXPLAIN
 SELECT * FROM City
 WHERE ((Population > 101000 AND Population < 110000) OR
-ID BETWEEN 3500 AND 3800) AND Country='USA'
+ID BETWEEN 3500 AND 3800) AND Country='FIN'
         AND (Name BETWEEN 'P' AND 'T' OR ID BETWEEN 4000 AND 4300);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	City	ref	PRIMARY,Population,Country,Name,CountryPopulation,CountryName	Country	3	const	267	Using where
+1	SIMPLE	City	ref	PRIMARY,Population,Country,Name,CountryPopulation,CountryName	CountryName	3	const	5	Using where
 SELECT * FROM City USE INDEX ()
 WHERE ((Population > 101000 AND Population < 102000) OR
 ID BETWEEN 3790 AND 3800) AND Country='USA'
@@ -939,20 +851,14 @@ ID	Name	Country	Population
 4032	Cambridge	USA	101355
 SELECT * FROM City USE INDEX ()
 WHERE ((Population > 101000 AND Population < 102000) OR
-ID BETWEEN 3790 AND 3800) AND Country='USA'
+ID BETWEEN 3790 AND 3800) AND Country='FIN'
         AND (Name LIKE 'Pa%' OR ID BETWEEN 4025 AND 4035);
 ID	Name	Country	Population
-4030	Sandy	USA	101853
-4031	Athens-Clarke County	USA	101489
-4032	Cambridge	USA	101355
 SELECT * FROM City
 WHERE ((Population > 101000 AND Population < 102000) OR
-ID BETWEEN 3790 AND 3800) AND Country='USA'
+ID BETWEEN 3790 AND 3800) AND Country='FIN'
         AND (Name LIKE 'Pa%' OR ID BETWEEN 4025 AND 4035);
 ID	Name	Country	Population
-4030	Sandy	USA	101853
-4031	Athens-Clarke County	USA	101489
-4032	Cambridge	USA	101355
 EXPLAIN
 SELECT * FROM City
 WHERE ((Population > 101000 and Population < 102000) OR

mysql-test/r/range_vs_index_merge_innodb.result

@@ -72,9 +72,9 @@ id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	SIMPLE	City	range	Population	Population	4	NULL	458	Using where
 EXPLAIN 
 SELECT * FROM City
-WHERE (Population > 101000 AND Population < 103000);
+WHERE (Population > 101000 AND Population < 102000);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	City	range	Population	Population	4	NULL	80	Using where
+1	SIMPLE	City	range	Population	Population	4	NULL	38	Using where
 EXPLAIN 
 SELECT * FROM City
 WHERE ((Name > 'Ca' AND Name < 'Cf') OR (Country > 'E' AND Country < 'F'));
@@ -89,9 +89,9 @@ id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 EXPLAIN 
 SELECT * FROM City
 WHERE ((Name > 'Ca' AND Name < 'Cf') OR (Country > 'E' AND Country < 'F'))
-AND (Population > 101000 AND Population < 103000);
+AND (Population > 101000 AND Population < 102000);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	City	range	Population,Country,Name	Population	4	NULL	80	Using where
+1	SIMPLE	City	range	Population,Country,Name	Population	4	NULL	38	Using where
 SELECT * FROM City USE INDEX ()
 WHERE ((Name > 'Ca' AND Name < 'Cf') OR (Country > 'E' AND Country < 'F'))
 AND (Population > 101000 AND Population < 115000);
@@ -154,24 +154,20 @@ ID	Name	Country	Population
 4032	Cambridge	USA	101355
 SELECT * FROM City USE INDEX ()
 WHERE ((Name > 'Ca' AND Name < 'Cf') OR (Country > 'E' AND Country < 'F'))
-AND (Population > 101000 AND Population < 103000);
+AND (Population > 101000 AND Population < 102000);
 ID	Name	Country	Population
 637	Mit Ghamr	EGY	101801
 707	Marbella	ESP	101144
-3411	Ceyhan	TUR	102412
 3792	Tartu	EST	101246
-4027	Cape Coral	USA	102286
 4032	Cambridge	USA	101355
 SELECT * FROM City
 WHERE ((Name > 'Ca' AND Name < 'Cf') OR (Country > 'E' AND Country < 'F'))
-AND (Population > 101000 AND Population < 103000);
+AND (Population > 101000 AND Population < 102000);
 ID	Name	Country	Population
 707	Marbella	ESP	101144
 3792	Tartu	EST	101246
 4032	Cambridge	USA	101355
 637	Mit Ghamr	EGY	101801
-4027	Cape Coral	USA	102286
-3411	Ceyhan	TUR	102412
 EXPLAIN
 SELECT  * FROM City WHERE (Name < 'Ac');
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
@@ -329,17 +325,17 @@ ID	Name	Country	Population
 1003	Pemalang	IDN	103500
 2663	Río Bravo	MEX	103901
 EXPLAIN
-SELECT * FROM City WHERE (ID < 50) OR (ID BETWEEN 100 AND 110);
+SELECT * FROM City WHERE (ID < 10) OR (ID BETWEEN 100 AND 110);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	City	range	PRIMARY	PRIMARY	4	NULL	60	Using where
+1	SIMPLE	City	range	PRIMARY	PRIMARY	4	NULL	20	Using where
 EXPLAIN
-SELECT * FROM City WHERE (ID < 200) OR (ID BETWEEN 300 AND 600);
+SELECT * FROM City WHERE (ID < 200) OR (ID BETWEEN 100 AND 200);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	City	range	PRIMARY	PRIMARY	4	NULL	1142	Using where
+1	SIMPLE	City	range	PRIMARY	PRIMARY	4	NULL	199	Using where
 EXPLAIN
-SELECT * FROM City WHERE (ID < 600) OR (ID BETWEEN 900 AND 1800);
+SELECT * FROM City WHERE (ID < 600) OR (ID BETWEEN 900 AND 1500);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	City	range	PRIMARY	PRIMARY	4	NULL	2950	Using where
+1	SIMPLE	City	range	PRIMARY	PRIMARY	4	NULL	2006	Using where
 EXPLAIN
 SELECT * FROM City WHERE Country > 'A' AND Country < 'ARG';
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
@@ -354,27 +350,27 @@ id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	SIMPLE	City	range	Name	Name	35	NULL	133	Using where
 EXPLAIN
 SELECT * FROM City
-WHERE ((ID < 50) AND (Name LIKE 'H%' OR (Country > 'A' AND Country < 'ARG')))
+WHERE ((ID < 10) AND (Name LIKE 'H%' OR (Country > 'A' AND Country < 'ARG')))
 OR ((ID BETWEEN 100 AND 110) AND 
 (Name LIKE 'P%' OR (Population > 103000 AND Population < 104000)));
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	City	range	PRIMARY,Population,Country,Name	PRIMARY	4	NULL	60	Using where
+1	SIMPLE	City	range	PRIMARY,Population,Country,Name	PRIMARY	4	NULL	20	Using where
 EXPLAIN
 SELECT * FROM City
 WHERE ((ID < 800) AND (Name LIKE 'Ha%' OR (Country > 'A' AND Country < 'ARG')))
-OR ((ID BETWEEN 900 AND 1800) AND 
+OR ((ID BETWEEN 900 AND 1500) AND 
 (Name LIKE 'Pa%' OR (Population > 103000 AND Population < 104000)));
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	SIMPLE	City	index_merge	PRIMARY,Population,Country,Name	Name,Country,Population	35,3,4	NULL	188	Using sort_union(Name,Country,Population); Using where
 EXPLAIN
 SELECT * FROM City
-WHERE ((ID < 600) AND (Name LIKE 'Ha%' OR (Country > 'A' AND Country < 'ARG')))
-OR ((ID BETWEEN 300 AND 600) AND 
+WHERE ((ID < 200) AND (Name LIKE 'Ha%' OR (Country > 'A' AND Country < 'ARG')))
+OR ((ID BETWEEN 100 AND 200) AND 
 (Name LIKE 'Pa%' OR (Population > 103000 AND Population < 104000)));
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	City	range	PRIMARY,Population,Country,Name	PRIMARY	4	NULL	1242	Using where
+1	SIMPLE	City	range	PRIMARY,Population,Country,Name	PRIMARY	4	NULL	199	Using where
 SELECT * FROM City USE INDEX ()
-WHERE ((ID < 50) AND (Name LIKE 'H%' OR (Country > 'A' AND Country < 'ARG')))
+WHERE ((ID < 10) AND (Name LIKE 'H%' OR (Country > 'A' AND Country < 'ARG')))
 OR ((ID BETWEEN 100 AND 110) AND 
 (Name LIKE 'P%' OR (Population > 103000 AND Population < 104000)));
 ID	Name	Country	Population
@@ -383,15 +379,10 @@ ID	Name	Country	Population
 3	Herat	AFG	186800
 4	Mazar-e-Sharif	AFG	127800
 7	Haag	NLD	440900
-16	Haarlem	NLD	148772
-25	Haarlemmermeer	NLD	110722
-31	Heerlen	NLD	95052
-33	Willemstad	ANT	2345
-34	Tirana	ALB	270000
 100	Paraná	ARG	207041
 102	Posadas	ARG	201273
 SELECT * FROM City
-WHERE ((ID < 50) AND (Name LIKE 'H%' OR (Country > 'A' AND Country < 'ARG')))
+WHERE ((ID < 10) AND (Name LIKE 'H%' OR (Country > 'A' AND Country < 'ARG')))
 OR ((ID BETWEEN 100 AND 110) AND 
 (Name LIKE 'P%' OR (Population > 103000 AND Population < 104000)));
 ID	Name	Country	Population
@@ -400,16 +391,11 @@ ID	Name	Country	Population
 3	Herat	AFG	186800
 4	Mazar-e-Sharif	AFG	127800
 7	Haag	NLD	440900
-16	Haarlem	NLD	148772
-25	Haarlemmermeer	NLD	110722
-31	Heerlen	NLD	95052
-33	Willemstad	ANT	2345
-34	Tirana	ALB	270000
 100	Paraná	ARG	207041
 102	Posadas	ARG	201273
 SELECT * FROM City USE INDEX()
 WHERE ((ID < 800) AND (Name LIKE 'Ha%' OR (Country > 'A' AND Country < 'ARG')))
-OR ((ID BETWEEN 900 AND 1800) AND 
+OR ((ID BETWEEN 900 AND 1500) AND 
 (Name LIKE 'Pa%' OR (Population > 103000 AND Population < 104000)));
 ID	Name	Country	Population
 1	Kabul	AFG	1780000
@@ -464,13 +450,9 @@ ID	Name	Country	Population
 1468	Palermo	ITA	683794
 1478	Padova	ITA	211391
 1484	Parma	ITA	168717
-1530	Kingston	JAM	103962
-1747	Toda	JPN	103969
-1748	Tajimi	JPN	103171
-1785	Ibb	YEM	103300
 SELECT * FROM City
 WHERE ((ID < 800) AND (Name LIKE 'Ha%' OR (Country > 'A' AND Country < 'ARG')))
-OR ((ID BETWEEN 900 AND 1800) AND 
+OR ((ID BETWEEN 900 AND 1500) AND 
 (Name LIKE 'Pa%' OR (Population > 103000 AND Population < 104000)));
 ID	Name	Country	Population
 1	Kabul	AFG	1780000
@@ -525,13 +507,9 @@ ID	Name	Country	Population
 1468	Palermo	ITA	683794
 1478	Padova	ITA	211391
 1484	Parma	ITA	168717
-1530	Kingston	JAM	103962
-1747	Toda	JPN	103969
-1748	Tajimi	JPN	103171
-1785	Ibb	YEM	103300
 SELECT * FROM City USE INDEX ()
 WHERE ((ID < 200) AND (Name LIKE 'Ha%' OR (Country > 'A' AND Country < 'ARG')))
-OR ((ID BETWEEN 300 AND 600) AND 
+OR ((ID BETWEEN 100 AND 200) AND 
 (Name LIKE 'Pa%' OR (Population > 103000 AND Population < 104000)));
 ID	Name	Country	Population
 1	Kabul	AFG	1780000
@@ -556,25 +534,15 @@ ID	Name	Country	Population
 66	Sharja	ARE	320095
 67	al-Ayn	ARE	225970
 68	Ajman	ARE	114395
+100	Paraná	ARG	207041
 129	Oranjestad	ABW	29034
+167	Jamalpur	BGD	103556
+168	Pabna	BGD	103277
+189	Parakou	BEN	103577
 191	Hamilton	BMU	1200
-339	Passo Fundo	BRA	166343
-364	Parnaíba	BRA	129756
-372	Paranaguá	BRA	126076
-379	Palmas	BRA	121919
-386	Patos de Minas	BRA	119262
-411	Guaratinguetá	BRA	103433
-412	Cachoeirinha	BRA	103240
-413	Codó	BRA	103153
-424	Passos	BRA	98570
-430	Paulo Afonso	BRA	97291
-435	Parnamirim	BRA	96210
-448	Patos	BRA	90519
-451	Palhoça	BRA	89465
-517	Oldham	GBR	103931
 SELECT * FROM City
 WHERE ((ID < 200) AND (Name LIKE 'Ha%' OR (Country > 'A' AND Country < 'ARG')))
-OR ((ID BETWEEN 300 AND 600) AND 
+OR ((ID BETWEEN 100 AND 200) AND 
 (Name LIKE 'Pa%' OR (Population > 103000 AND Population < 104000)));
 ID	Name	Country	Population
 1	Kabul	AFG	1780000
@@ -599,22 +567,12 @@ ID	Name	Country	Population
 66	Sharja	ARE	320095
 67	al-Ayn	ARE	225970
 68	Ajman	ARE	114395
+100	Paraná	ARG	207041
 129	Oranjestad	ABW	29034
+167	Jamalpur	BGD	103556
+168	Pabna	BGD	103277
+189	Parakou	BEN	103577
 191	Hamilton	BMU	1200
-339	Passo Fundo	BRA	166343
-364	Parnaíba	BRA	129756
-372	Paranaguá	BRA	126076
-379	Palmas	BRA	121919
-386	Patos de Minas	BRA	119262
-411	Guaratinguetá	BRA	103433
-412	Cachoeirinha	BRA	103240
-413	Codó	BRA	103153
-424	Passos	BRA	98570
-430	Paulo Afonso	BRA	97291
-435	Parnamirim	BRA	96210
-448	Patos	BRA	90519
-451	Palhoça	BRA	89465
-517	Oldham	GBR	103931
 EXPLAIN 
 SELECT * FROM City WHERE Population > 101000 AND Population < 102000;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
@@ -735,6 +693,10 @@ SELECT * FROM City WHERE Country='USA';
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	SIMPLE	City	ref	Country,CountryPopulation	Country	3	const	274	Using where
 EXPLAIN
+SELECT * FROM City WHERE Country='FIN';
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	City	ref	Country,CountryPopulation	Country	3	const	7	Using where
+EXPLAIN
 SELECT * FROM City 
 WHERE ((Population > 101000 AND Population < 103000) OR Name LIKE 'Pas%')
 AND Country='USA';
@@ -743,9 +705,9 @@ id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 EXPLAIN
 SELECT * FROM City 
 WHERE ((Population > 101000 AND Population < 103000) OR Name LIKE 'P%')
-AND Country='USA';
+AND Country='FIN';
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	City	ref	Population,Country,Name,CountryPopulation	Country	3	const	274	Using where
+1	SIMPLE	City	ref	Population,Country,Name,CountryPopulation	Country	3	const	7	Using where
 SELECT * FROM City 
 WHERE ((Population > 101000 AND Population < 103000) OR Name LIKE 'Pas%')
 AND Country='USA';
@@ -780,72 +742,22 @@ ID	Name	Country	Population
 4032	Cambridge	USA	101355
 SELECT * FROM City 
 WHERE ((Population > 101000 AND Population < 103000) OR Name LIKE 'P%')
-AND Country='USA';
+AND Country='FIN';
 ID	Name	Country	Population
-3797	Philadelphia	USA	1517550
-3798	Phoenix	USA	1321045
-3820	Portland	USA	529121
-3844	Pittsburgh	USA	334563
-3870	Plano	USA	222030
-3912	Providence	USA	173618
-3930	Pomona	USA	149473
-3932	Paterson	USA	149222
-3943	Pasadena	USA	141674
-3951	Pembroke Pines	USA	137427
-3953	Pasadena	USA	133936
-3967	Paradise	USA	124682
-3986	Palmdale	USA	116670
-3996	Peoria	USA	112936
-4007	Peoria	USA	108364
-4016	Provo	USA	105166
-4023	Gary	USA	102746
-4024	Berkeley	USA	102743
-4025	Santa Clara	USA	102361
-4026	Green Bay	USA	102313
-4027	Cape Coral	USA	102286
-4028	Arvada	USA	102153
-4029	Pueblo	USA	102121
-4030	Sandy	USA	101853
-4031	Athens-Clarke County	USA	101489
-4032	Cambridge	USA	101355
-4035	Portsmouth	USA	100565
 SELECT * FROM City USE INDEX ()
 WHERE ((Population > 101000 AND Population < 103000) OR Name LIKE 'P%')
-AND Country='USA';
+AND Country='FIN';
 ID	Name	Country	Population
-3797	Philadelphia	USA	1517550
-3798	Phoenix	USA	1321045
-3820	Portland	USA	529121
-3844	Pittsburgh	USA	334563
-3870	Plano	USA	222030
-3912	Providence	USA	173618
-3930	Pomona	USA	149473
-3932	Paterson	USA	149222
-3943	Pasadena	USA	141674
-3951	Pembroke Pines	USA	137427
-3953	Pasadena	USA	133936
-3967	Paradise	USA	124682
-3986	Palmdale	USA	116670
-3996	Peoria	USA	112936
-4007	Peoria	USA	108364
-4016	Provo	USA	105166
-4023	Gary	USA	102746
-4024	Berkeley	USA	102743
-4025	Santa Clara	USA	102361
-4026	Green Bay	USA	102313
-4027	Cape Coral	USA	102286
-4028	Arvada	USA	102153
-4029	Pueblo	USA	102121
-4030	Sandy	USA	101853
-4031	Athens-Clarke County	USA	101489
-4032	Cambridge	USA	101355
-4035	Portsmouth	USA	100565
 CREATE INDEX CountryName ON City(Country,Name);
 EXPLAIN
 SELECT * FROM City WHERE Country='USA';
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	SIMPLE	City	ref	Country,CountryPopulation,CountryName	Country	3	const	274	Using where
 EXPLAIN
+SELECT * FROM City WHERE Country='FIN';
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	City	ref	Country,CountryPopulation,CountryName	Country	3	const	7	Using where
+EXPLAIN
 SELECT * FROM City WHERE Country='BRA';
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	SIMPLE	City	ref	Country,CountryPopulation,CountryName	Country	3	const	250	Using where
@@ -902,10 +814,10 @@ id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 EXPLAIN
 SELECT * FROM City
 WHERE ((Population > 101000 AND Population < 110000) OR
-ID BETWEEN 3500 AND 3800) AND Country='USA'
+ID BETWEEN 3500 AND 3800) AND Country='FIN'
         AND (Name BETWEEN 'P' AND 'T' OR ID BETWEEN 4000 AND 4300);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	City	ref	PRIMARY,Population,Country,Name,CountryPopulation,CountryName	Country	3	const	274	Using where
+1	SIMPLE	City	ref	PRIMARY,Population,Country,Name,CountryPopulation,CountryName	Country	3	const	7	Using where
 SELECT * FROM City USE INDEX ()
 WHERE ((Population > 101000 AND Population < 102000) OR
 ID BETWEEN 3790 AND 3800) AND Country='USA'
@@ -940,20 +852,14 @@ ID	Name	Country	Population
 4032	Cambridge	USA	101355
 SELECT * FROM City USE INDEX ()
 WHERE ((Population > 101000 AND Population < 102000) OR
-ID BETWEEN 3790 AND 3800) AND Country='USA'
+ID BETWEEN 3790 AND 3800) AND Country='FIN'
         AND (Name LIKE 'Pa%' OR ID BETWEEN 4025 AND 4035);
 ID	Name	Country	Population
-4030	Sandy	USA	101853
-4031	Athens-Clarke County	USA	101489
-4032	Cambridge	USA	101355
 SELECT * FROM City
 WHERE ((Population > 101000 AND Population < 102000) OR
-ID BETWEEN 3790 AND 3800) AND Country='USA'
+ID BETWEEN 3790 AND 3800) AND Country='FIN'
         AND (Name LIKE 'Pa%' OR ID BETWEEN 4025 AND 4035);
 ID	Name	Country	Population
-4030	Sandy	USA	101853
-4031	Athens-Clarke County	USA	101489
-4032	Cambridge	USA	101355
 EXPLAIN
 SELECT * FROM City
 WHERE ((Population > 101000 and Population < 102000) OR

mysql-test/t/range_vs_index_merge.test

@@ -68,7 +68,7 @@ SELECT * FROM City
 
 EXPLAIN 
 SELECT * FROM City
-  WHERE (Population > 101000 AND Population < 103000);
+  WHERE (Population > 101000 AND Population < 102000);
 
 EXPLAIN 
 SELECT * FROM City
@@ -88,7 +88,7 @@ SELECT * FROM City
 EXPLAIN 
 SELECT * FROM City
   WHERE ((Name > 'Ca' AND Name < 'Cf') OR (Country > 'E' AND Country < 'F'))
-        AND (Population > 101000 AND Population < 103000);
+        AND (Population > 101000 AND Population < 102000);
 
 # The following 4 queries check that the plans
 # for the previous 2 plans are valid
@@ -103,11 +103,11 @@ SELECT * FROM City
 
 SELECT * FROM City USE INDEX ()
   WHERE ((Name > 'Ca' AND Name < 'Cf') OR (Country > 'E' AND Country < 'F'))
-        AND (Population > 101000 AND Population < 103000);
+        AND (Population > 101000 AND Population < 102000);
 
 SELECT * FROM City
   WHERE ((Name > 'Ca' AND Name < 'Cf') OR (Country > 'E' AND Country < 'F'))
-        AND (Population > 101000 AND Population < 103000);
+        AND (Population > 101000 AND Population < 102000);
 
 # The output of the next 7 commands tells us about selectivities
 # of the conditions utilized in 4 queries following after them  
@@ -197,11 +197,11 @@ SELECT  * FROM City
 # of the conditions utilized in 3 queries following after them  
 
 EXPLAIN
-SELECT * FROM City WHERE (ID < 50) OR (ID BETWEEN 100 AND 110);
+SELECT * FROM City WHERE (ID < 10) OR (ID BETWEEN 100 AND 110);
 EXPLAIN
-SELECT * FROM City WHERE (ID < 200) OR (ID BETWEEN 300 AND 600);
+SELECT * FROM City WHERE (ID < 200) OR (ID BETWEEN 100 AND 200);
 EXPLAIN
-SELECT * FROM City WHERE (ID < 600) OR (ID BETWEEN 900 AND 1800);
+SELECT * FROM City WHERE (ID < 600) OR (ID BETWEEN 900 AND 1500);
 EXPLAIN
 SELECT * FROM City WHERE Country > 'A' AND Country < 'ARG';
 EXPLAIN
@@ -219,20 +219,20 @@ SELECT * FROM City WHERE Name LIKE 'Ha%' OR Name LIKE 'Pa%' ;
 
 EXPLAIN
 SELECT * FROM City
-  WHERE ((ID < 50) AND (Name LIKE 'H%' OR (Country > 'A' AND Country < 'ARG')))
+  WHERE ((ID < 10) AND (Name LIKE 'H%' OR (Country > 'A' AND Country < 'ARG')))
         OR ((ID BETWEEN 100 AND 110) AND 
             (Name LIKE 'P%' OR (Population > 103000 AND Population < 104000)));
 
 EXPLAIN
 SELECT * FROM City
   WHERE ((ID < 800) AND (Name LIKE 'Ha%' OR (Country > 'A' AND Country < 'ARG')))
-        OR ((ID BETWEEN 900 AND 1800) AND 
+        OR ((ID BETWEEN 900 AND 1500) AND 
             (Name LIKE 'Pa%' OR (Population > 103000 AND Population < 104000)));
 
 EXPLAIN
 SELECT * FROM City
-  WHERE ((ID < 600) AND (Name LIKE 'Ha%' OR (Country > 'A' AND Country < 'ARG')))
-        OR ((ID BETWEEN 300 AND 600) AND 
+  WHERE ((ID < 200) AND (Name LIKE 'Ha%' OR (Country > 'A' AND Country < 'ARG')))
+        OR ((ID BETWEEN 100 AND 200) AND 
             (Name LIKE 'Pa%' OR (Population > 103000 AND Population < 104000)));
 
 
@@ -240,33 +240,33 @@ SELECT * FROM City
 # for the previous 3 plans are valid
 
 SELECT * FROM City USE INDEX ()
-  WHERE ((ID < 50) AND (Name LIKE 'H%' OR (Country > 'A' AND Country < 'ARG')))
+  WHERE ((ID < 10) AND (Name LIKE 'H%' OR (Country > 'A' AND Country < 'ARG')))
         OR ((ID BETWEEN 100 AND 110) AND 
             (Name LIKE 'P%' OR (Population > 103000 AND Population < 104000)));
 
 SELECT * FROM City
-  WHERE ((ID < 50) AND (Name LIKE 'H%' OR (Country > 'A' AND Country < 'ARG')))
+  WHERE ((ID < 10) AND (Name LIKE 'H%' OR (Country > 'A' AND Country < 'ARG')))
         OR ((ID BETWEEN 100 AND 110) AND 
             (Name LIKE 'P%' OR (Population > 103000 AND Population < 104000)));
 
 SELECT * FROM City USE INDEX()
   WHERE ((ID < 800) AND (Name LIKE 'Ha%' OR (Country > 'A' AND Country < 'ARG')))
-        OR ((ID BETWEEN 900 AND 1800) AND 
+        OR ((ID BETWEEN 900 AND 1500) AND 
             (Name LIKE 'Pa%' OR (Population > 103000 AND Population < 104000)));
 
 SELECT * FROM City
   WHERE ((ID < 800) AND (Name LIKE 'Ha%' OR (Country > 'A' AND Country < 'ARG')))
-        OR ((ID BETWEEN 900 AND 1800) AND 
+        OR ((ID BETWEEN 900 AND 1500) AND 
             (Name LIKE 'Pa%' OR (Population > 103000 AND Population < 104000)));
 
 SELECT * FROM City USE INDEX ()
   WHERE ((ID < 200) AND (Name LIKE 'Ha%' OR (Country > 'A' AND Country < 'ARG')))
-        OR ((ID BETWEEN 300 AND 600) AND 
+        OR ((ID BETWEEN 100 AND 200) AND 
             (Name LIKE 'Pa%' OR (Population > 103000 AND Population < 104000)));
 
 SELECT * FROM City
   WHERE ((ID < 200) AND (Name LIKE 'Ha%' OR (Country > 'A' AND Country < 'ARG')))
-        OR ((ID BETWEEN 300 AND 600) AND 
+        OR ((ID BETWEEN 100 AND 200) AND 
             (Name LIKE 'Pa%' OR (Population > 103000 AND Population < 104000)));
 
 
@@ -353,7 +353,7 @@ ANALYZE TABLE City;
 --enable_result_log
 --enable_query_log
 
-# The output of the next 4 commands tells us about selectivities
+# The output of the next 5 commands tells us about selectivities
 # of the conditions utilized in 2 queries following after them  
 
 EXPLAIN
@@ -364,6 +364,8 @@ EXPLAIN
 SELECT * FROM City WHERE (Population > 101000 AND Population < 103000);
 EXPLAIN
 SELECT * FROM City WHERE Country='USA';
+EXPLAIN
+SELECT * FROM City WHERE Country='FIN';
 
 # The pattern of the WHERE condition used in the following 3 queries is
 #   (range(key1_p2) OR (range(key2)) AND key1_p1=c
@@ -380,7 +382,7 @@ SELECT * FROM City
 EXPLAIN
 SELECT * FROM City 
   WHERE ((Population > 101000 AND Population < 103000) OR Name LIKE 'P%')
-        AND Country='USA';
+        AND Country='FIN';
 
 # The following 4 queries check that the plans
 # for the previous 2 plans are valid
@@ -395,11 +397,11 @@ SELECT * FROM City USE INDEX ()
 
 SELECT * FROM City 
   WHERE ((Population > 101000 AND Population < 103000) OR Name LIKE 'P%')
-        AND Country='USA';
+        AND Country='FIN';
 
 SELECT * FROM City USE INDEX ()
   WHERE ((Population > 101000 AND Population < 103000) OR Name LIKE 'P%')
-        AND Country='USA';
+        AND Country='FIN';
 
 
 CREATE INDEX CountryName ON City(Country,Name);
@@ -412,12 +414,14 @@ ANALYZE TABLE City;
 --enable_result_log
 --enable_query_log
 
-# The output of the next 11 commands tells us about selectivities
+# The output of the next 12 commands tells us about selectivities
 # of the conditions utilized in 3 queries following after them  
 
 EXPLAIN
 SELECT * FROM City WHERE Country='USA';
 EXPLAIN
+SELECT * FROM City WHERE Country='FIN';
+EXPLAIN
 SELECT * FROM City WHERE Country='BRA';
 EXPLAIN
 SELECT * FROM City WHERE ID BETWEEN 3790 AND 3800;
@@ -464,7 +468,7 @@ SELECT * FROM City
 EXPLAIN
 SELECT * FROM City
   WHERE ((Population > 101000 AND Population < 110000) OR
-          ID BETWEEN 3500 AND 3800) AND Country='USA'
+          ID BETWEEN 3500 AND 3800) AND Country='FIN'
         AND (Name BETWEEN 'P' AND 'T' OR ID BETWEEN 4000 AND 4300);
 
 # The following 6 queries check that the plans
@@ -492,12 +496,12 @@ SELECT * FROM City
 
 SELECT * FROM City USE INDEX ()
   WHERE ((Population > 101000 AND Population < 102000) OR
-          ID BETWEEN 3790 AND 3800) AND Country='USA'
+          ID BETWEEN 3790 AND 3800) AND Country='FIN'
         AND (Name LIKE 'Pa%' OR ID BETWEEN 4025 AND 4035);
 
 SELECT * FROM City
   WHERE ((Population > 101000 AND Population < 102000) OR
-          ID BETWEEN 3790 AND 3800) AND Country='USA'
+          ID BETWEEN 3790 AND 3800) AND Country='FIN'
         AND (Name LIKE 'Pa%' OR ID BETWEEN 4025 AND 4035);
 
 

sql/mysql_priv.h

@@ -338,7 +338,7 @@ protected:
   Number of comparisons of table rowids equivalent to reading one row from a 
   table.
 */
-#define TIME_FOR_COMPARE_ROWID  (TIME_FOR_COMPARE*2)
+#define TIME_FOR_COMPARE_ROWID  (TIME_FOR_COMPARE*100)
 
 /*
   For sequential disk seeks the cost formula is:

sql/opt_range.cc

@@ -1093,7 +1093,7 @@ int SEL_IMERGE::or_sel_tree_with_checks(RANGE_OPT_PARAM *param,
     {
       bool must_be_ored= sel_trees_must_be_ored(param, *or_tree, tree,
                                                 ored_keys);
-      if (must_be_ored == is_first_check_pass) 
+      if (must_be_ored || !is_first_check_pass) 
       {
         result_keys.clear_all();
         result= *or_tree;
@@ -1138,8 +1138,7 @@ int SEL_IMERGE::or_sel_tree_with_checks(RANGE_OPT_PARAM *param,
       *or_tree= result;
       if (is_first_check_pass)
         return 0;
-      else
-        was_ored= TRUE;
+      was_ored= TRUE;
     }
   }
   if (was_ored)