Backport into MariaDB-5.2 the following:

WL#2474 "Multi Range Read: Change the default MRR implementation to implement new MRR interface"
WL#2475 "Batched range read functions for MyISAM/InnoDb"
        "Index condition pushdown for MyISAM/InnoDB"
- Adjust test results (checked)
- Code cleanup.

14 files changed, 51 insertions, 55 deletions

diff --git a/mysql-test/r/myisam_mrr.result b/mysql-test/r/myisam_mrr.result
index f3f89966da2..e61d5484e27 100644
--- a/mysql-test/r/myisam_mrr.result
+++ b/mysql-test/r/myisam_mrr.result
@@ -3,9 +3,6 @@ set @read_rnd_buffer_size_save= @@read_rnd_buffer_size;
 set read_rnd_buffer_size=79;
 Warnings:
 Warning	1292	Truncated incorrect read_rnd_buffer_size value: '79'
-select @@read_rnd_buffer_size;
-@@read_rnd_buffer_size
-8228
 create table t1(a int);
 show create table t1;
 Table	Create Table
diff --git a/mysql-test/suite/maria/r/maria.result b/mysql-test/suite/maria/r/maria.result
index 5e33c3fa423..49f3bbcd07a 100644
--- a/mysql-test/suite/maria/r/maria.result
+++ b/mysql-test/suite/maria/r/maria.result
@@ -382,20 +382,20 @@ id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 explain select * from t1,t2 where t1.b=t2.b;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	SIMPLE	t2	ALL	b	NULL	NULL	NULL	2	
-1	SIMPLE	t1	ref	b	b	5	test.t2.b	1	Using where
+1	SIMPLE	t1	ref	b	b	5	test.t2.b	1	
 explain select * from t1,t2 force index(c) where t1.a=t2.a;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	SIMPLE	t2	ALL	NULL	NULL	NULL	NULL	2	
 1	SIMPLE	t1	ref	a	a	4	test.t2.a	3	
 explain select * from t1 where a=0 or a=2;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	a	a	4	NULL	4	Using where
+1	SIMPLE	t1	range	a	a	4	NULL	4	Using index condition; Using MRR
 explain select * from t1 force index (a) where a=0 or a=2;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	a	a	4	NULL	4	Using where
+1	SIMPLE	t1	range	a	a	4	NULL	4	Using index condition; Using MRR
 explain select * from t1 where c=1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	ref	c,c_2	c	5	const	1	Using where
+1	SIMPLE	t1	ref	c,c_2	c	5	const	1	
 explain select * from t1 use index() where c=1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	5	Using where
@@ -1131,7 +1131,7 @@ qq
 *a         *a*a         *
 explain select * from t1 where v='a';
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	ref	v,v_2	#	13	const	#	Using where
+1	SIMPLE	t1	ref	v,v_2	#	13	const	#	Using index condition
 select v,count(*) from t1 group by v limit 10;
 v	count(*)
 a
	1
@@ -1307,7 +1307,7 @@ id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	SIMPLE	t1	ref	v	v	303	const	#	Using where; Using index
 explain select * from t1 where v='a';
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	ref	v	v	303	const	#	Using where
+1	SIMPLE	t1	ref	v	v	303	const	#	Using index condition
 select v,count(*) from t1 group by v limit 10;
 v	count(*)
 a
	1
diff --git a/mysql-test/suite/parts/r/partition_special_innodb.result b/mysql-test/suite/parts/r/partition_special_innodb.result
index e73dd6609dc..64a18188888 100644
--- a/mysql-test/suite/parts/r/partition_special_innodb.result
+++ b/mysql-test/suite/parts/r/partition_special_innodb.result
@@ -31,9 +31,9 @@ a	b	c	d
 2000-06-15	jukg	zikhuk	m
 select * from t1 where a<19851231;
 a	b	c	d
-1983-12-31	cdef	srtbvsr	w
-1980-10-14	fgbbd	dtzndtz	w
 1975-01-01	abcde	abcde	m
+1980-10-14	fgbbd	dtzndtz	w
+1983-12-31	cdef	srtbvsr	w
 drop table t1;
 create table t1 (a date not null, b varchar(50) not null, c varchar(50) not null, d enum('m', 'w') not null, e int not null, f decimal (18,2) not null, g bigint not null, h tinyint not null, i char(255), primary key(a,b,c,d,e,f,g,h)) engine='InnoDB' 
 partition by key(a,b,c,d,e,f,g,h) (
@@ -73,9 +73,9 @@ a	b	c	d	e	f	g	h	i
 2000-06-15	jukg	zikhuk	m	45675	6465754.13	435242623462	18	pib mdotkbm.m
 select * from t1 where a<19851231;
 a	b	c	d	e	f	g	h	i
+1975-01-01	abcde	abcde	m	1234	123.45	32412341234	113	tbhth nrzh ztfghgfh fzh ftzhj fztjh
 1980-10-14	fgbbd	dtzndtz	w	67856	5463354.67	3567845333	124	d,f söierugsig msireg siug ei5ggth lrutluitgzeöjrtnb.rkjthuekuhzrkuthgjdnffjmbr
 1983-12-31	cdef	srtbvsr	w	45634	13452.56	3452346456	127	liuugbzvdmrlti b itiortudirtfgtibm dfi
-1975-01-01	abcde	abcde	m	1234	123.45	32412341234	113	tbhth nrzh ztfghgfh fzh ftzhj fztjh
 drop table t1;
 create table t1 (a date not null, b varchar(50) not null, c varchar(50) not null, d enum('m', 'w') not null, e int not null, f decimal (18,2) not null, g bigint not null, h tinyint not null, a1 date not null, b1 varchar(50) not null, c1 varchar(50) not null, d1 enum('m', 'w') not null, e1 int not null, f1 decimal (18,2) not null, g1 bigint not null, h1 tinyint not null, i char(255), primary key(a,b,c,d,e,f,g,h,a1,b1,c1,d1,e1,f1,g1,h1)) engine='InnoDB' 
 partition by key(a,b,c,d,e,f,g,h,a1,b1,c1,d1,e1,f1,g1,h1) (
@@ -123,9 +123,9 @@ a	b	c	d	e	f	g	h	a1	b1	c1	d1	e1	f1	g1	h1	i
 2000-06-15	jukg	zikhuk	m	45675	6465754.13	435242623462	18	2000-06-15	jukg	zikhuk	m	45675	6465754.13	435242623462	18	pib mdotkbm.m
 select * from t1 where a<19851231;
 a	b	c	d	e	f	g	h	a1	b1	c1	d1	e1	f1	g1	h1	i
-1983-12-31	cdef	srtbvsr	w	45634	13452.56	3452346456	127	1983-12-31	cdef	srtbvsr	w	45634	13452.56	3452346456	127	liuugbzvdmrlti b itiortudirtfgtibm dfi
-1980-10-14	fgbbd	dtzndtz	w	67856	5463354.67	3567845333	124	1980-10-14	fgbbd	dtzndtz	w	67856	5463354.67	3567845333	124	d,f söierugsig msireg siug ei5ggth lrutluitgzeöjrtnb.rkjthuekuhzrkuthgjdnffjmbr
 1975-01-01	abcde	abcde	m	1234	123.45	32412341234	113	1975-01-01	abcde	abcde	m	1234	123.45	32412341234	113	tbhth nrzh ztfghgfh fzh ftzhj fztjh
+1980-10-14	fgbbd	dtzndtz	w	67856	5463354.67	3567845333	124	1980-10-14	fgbbd	dtzndtz	w	67856	5463354.67	3567845333	124	d,f söierugsig msireg siug ei5ggth lrutluitgzeöjrtnb.rkjthuekuhzrkuthgjdnffjmbr
+1983-12-31	cdef	srtbvsr	w	45634	13452.56	3452346456	127	1983-12-31	cdef	srtbvsr	w	45634	13452.56	3452346456	127	liuugbzvdmrlti b itiortudirtfgtibm dfi
 drop table t1;
 create table t1 (a date not null, b varchar(50) not null, c varchar(50) not null, d enum('m', 'w') not null, e int not null, f decimal (18,2) not null, g bigint not null, h tinyint not null, a1 date not null, b1 varchar(50) not null, c1 varchar(50) not null, d1 enum('m', 'w') not null, e1 int not null, f1 decimal (18,2) not null, g1 bigint not null, h1 tinyint not null, a2 date not null, b2 varchar(50) not null, c2 varchar(50) not null, d2 enum('m', 'w') not null, e2 int not null, f2 decimal (18,2) not null, g2 bigint not null, h2 tinyint not null, a3 date not null, b3 varchar(50) not null, c3 varchar(50) not null, d3 enum('m', 'w') not null, e3 int not null, f3 decimal (18,2) not null, g3 bigint not null, h3 tinyint not null, i char(255), primary key(a,b,c,d,e,f,g,h,a1,b1,c1,d1,e1,f1,g1,h1,a2,b2,c2,d2,e2,f2,g2,h2,a3,b3,c3,d3,e3,f3,g3,h3,a4)) engine='InnoDB' 
 partition by key(a,b,c,d,e,f,g,h,a1,b1,c1,d1,e1,f1,g1,h1,a2,b2,c2,d2,e2,f2,g2,h2,a3,b3,c3,d3,e3,f3,g3,h3,a4) (
@@ -203,9 +203,9 @@ a	b	c	d	e	f	g	h	a1	b1	c1	d1	e1	f1	g1	h1	a2	b2	c2	d2	e2	f2	g2	h2	a3	b3	c3	d3	e3	f
 2000-06-15	jukg	zikhuk	m	45675	6465754.13	435242623462	18	2000-06-15	jukg	zikhuk	m	45675	6465754.13	435242623462	18	2000-06-15	jukg	zikhuk	m	45675	6465754.13	435242623462	18	2000-06-15	jukg	zikhuk	m	45675	6465754.13	435242623462	18	pib mdotkbm.m
 select * from t1 where a<19851231;
 a	b	c	d	e	f	g	h	a1	b1	c1	d1	e1	f1	g1	h1	a2	b2	c2	d2	e2	f2	g2	h2	a3	b3	c3	d3	e3	f3	g3	h3	i
+1975-01-01	abcde	abcde	m	1234	123.45	32412341234	113	1975-01-01	abcde	abcde	m	1234	123.45	32412341234	113	1975-01-01	abcde	abcde	m	1234	123.45	32412341234	113	1975-01-01	abcde	abcde	m	1234	123.45	32412341234	113	tbhth nrzh ztfghgfh fzh ftzhj fztjh
 1980-10-14	fgbbd	dtzndtz	w	67856	5463354.67	3567845333	124	1980-10-14	fgbbd	dtzndtz	w	67856	5463354.67	3567845333	124	1980-10-14	fgbbd	dtzndtz	w	67856	5463354.67	3567845333	124	1980-10-14	fgbbd	dtzndtz	w	67856	5463354.67	3567845333	124	d,f söierugsig msireg siug ei5ggth lrutluitgzeöjrtnb.rkjthuekuhzrkuthgjdnffjmbr
 1983-12-31	cdef	srtbvsr	w	45634	13452.56	3452346456	127	1983-12-31	cdef	srtbvsr	w	45634	13452.56	3452346456	127	1983-12-31	cdef	srtbvsr	w	45634	13452.56	3452346456	127	1983-12-31	cdef	srtbvsr	w	45634	13452.56	3452346456	127	liuugbzvdmrlti b itiortudirtfgtibm dfi
-1975-01-01	abcde	abcde	m	1234	123.45	32412341234	113	1975-01-01	abcde	abcde	m	1234	123.45	32412341234	113	1975-01-01	abcde	abcde	m	1234	123.45	32412341234	113	1975-01-01	abcde	abcde	m	1234	123.45	32412341234	113	tbhth nrzh ztfghgfh fzh ftzhj fztjh
 drop table t1;
 # Bug#34604 - Assertion 'inited==RND' failed in handler::ha_rnd_end
 CREATE TABLE t1 (
diff --git a/mysql-test/suite/parts/r/partition_special_myisam.result b/mysql-test/suite/parts/r/partition_special_myisam.result
index ca7f7aeb760..613f0716de4 100644
--- a/mysql-test/suite/parts/r/partition_special_myisam.result
+++ b/mysql-test/suite/parts/r/partition_special_myisam.result
@@ -73,9 +73,9 @@ a	b	c	d	e	f	g	h	i
 2000-06-15	jukg	zikhuk	m	45675	6465754.13	435242623462	18	pib mdotkbm.m
 select * from t1 where a<19851231;
 a	b	c	d	e	f	g	h	i
+1975-01-01	abcde	abcde	m	1234	123.45	32412341234	113	tbhth nrzh ztfghgfh fzh ftzhj fztjh
 1980-10-14	fgbbd	dtzndtz	w	67856	5463354.67	3567845333	124	d,f söierugsig msireg siug ei5ggth lrutluitgzeöjrtnb.rkjthuekuhzrkuthgjdnffjmbr
 1983-12-31	cdef	srtbvsr	w	45634	13452.56	3452346456	127	liuugbzvdmrlti b itiortudirtfgtibm dfi
-1975-01-01	abcde	abcde	m	1234	123.45	32412341234	113	tbhth nrzh ztfghgfh fzh ftzhj fztjh
 drop table t1;
 create table t1 (a date not null, b varchar(50) not null, c varchar(50) not null, d enum('m', 'w') not null, e int not null, f decimal (18,2) not null, g bigint not null, h tinyint not null, a1 date not null, b1 varchar(50) not null, c1 varchar(50) not null, d1 enum('m', 'w') not null, e1 int not null, f1 decimal (18,2) not null, g1 bigint not null, h1 tinyint not null, i char(255), primary key(a,b,c,d,e,f,g,h,a1,b1,c1,d1,e1,f1,g1,h1)) engine='MyISAM' 
 partition by key(a,b,c,d,e,f,g,h,a1,b1,c1,d1,e1,f1,g1,h1) (
@@ -123,9 +123,9 @@ a	b	c	d	e	f	g	h	a1	b1	c1	d1	e1	f1	g1	h1	i
 2000-06-15	jukg	zikhuk	m	45675	6465754.13	435242623462	18	2000-06-15	jukg	zikhuk	m	45675	6465754.13	435242623462	18	pib mdotkbm.m
 select * from t1 where a<19851231;
 a	b	c	d	e	f	g	h	a1	b1	c1	d1	e1	f1	g1	h1	i
-1983-12-31	cdef	srtbvsr	w	45634	13452.56	3452346456	127	1983-12-31	cdef	srtbvsr	w	45634	13452.56	3452346456	127	liuugbzvdmrlti b itiortudirtfgtibm dfi
-1980-10-14	fgbbd	dtzndtz	w	67856	5463354.67	3567845333	124	1980-10-14	fgbbd	dtzndtz	w	67856	5463354.67	3567845333	124	d,f söierugsig msireg siug ei5ggth lrutluitgzeöjrtnb.rkjthuekuhzrkuthgjdnffjmbr
 1975-01-01	abcde	abcde	m	1234	123.45	32412341234	113	1975-01-01	abcde	abcde	m	1234	123.45	32412341234	113	tbhth nrzh ztfghgfh fzh ftzhj fztjh
+1980-10-14	fgbbd	dtzndtz	w	67856	5463354.67	3567845333	124	1980-10-14	fgbbd	dtzndtz	w	67856	5463354.67	3567845333	124	d,f söierugsig msireg siug ei5ggth lrutluitgzeöjrtnb.rkjthuekuhzrkuthgjdnffjmbr
+1983-12-31	cdef	srtbvsr	w	45634	13452.56	3452346456	127	1983-12-31	cdef	srtbvsr	w	45634	13452.56	3452346456	127	liuugbzvdmrlti b itiortudirtfgtibm dfi
 drop table t1;
 create table t1 (a date not null, b varchar(50) not null, c varchar(50) not null, d enum('m', 'w') not null, e int not null, f decimal (18,2) not null, g bigint not null, h tinyint not null, a1 date not null, b1 varchar(50) not null, c1 varchar(50) not null, d1 enum('m', 'w') not null, e1 int not null, f1 decimal (18,2) not null, g1 bigint not null, h1 tinyint not null, a2 date not null, b2 varchar(50) not null, c2 varchar(50) not null, d2 enum('m', 'w') not null, e2 int not null, f2 decimal (18,2) not null, g2 bigint not null, h2 tinyint not null, a3 date not null, b3 varchar(50) not null, c3 varchar(50) not null, d3 enum('m', 'w') not null, e3 int not null, f3 decimal (18,2) not null, g3 bigint not null, h3 tinyint not null, i char(255), primary key(a,b,c,d,e,f,g,h,a1,b1,c1,d1,e1,f1,g1,h1,a2,b2,c2,d2,e2,f2,g2,h2,a3,b3,c3,d3,e3,f3,g3,h3,a4)) engine='MyISAM' 
 partition by key(a,b,c,d,e,f,g,h,a1,b1,c1,d1,e1,f1,g1,h1,a2,b2,c2,d2,e2,f2,g2,h2,a3,b3,c3,d3,e3,f3,g3,h3,a4) (
@@ -203,7 +203,7 @@ a	b	c	d	e	f	g	h	a1	b1	c1	d1	e1	f1	g1	h1	a2	b2	c2	d2	e2	f2	g2	h2	a3	b3	c3	d3	e3	f
 2000-06-15	jukg	zikhuk	m	45675	6465754.13	435242623462	18	2000-06-15	jukg	zikhuk	m	45675	6465754.13	435242623462	18	2000-06-15	jukg	zikhuk	m	45675	6465754.13	435242623462	18	2000-06-15	jukg	zikhuk	m	45675	6465754.13	435242623462	18	pib mdotkbm.m
 select * from t1 where a<19851231;
 a	b	c	d	e	f	g	h	a1	b1	c1	d1	e1	f1	g1	h1	a2	b2	c2	d2	e2	f2	g2	h2	a3	b3	c3	d3	e3	f3	g3	h3	i
+1975-01-01	abcde	abcde	m	1234	123.45	32412341234	113	1975-01-01	abcde	abcde	m	1234	123.45	32412341234	113	1975-01-01	abcde	abcde	m	1234	123.45	32412341234	113	1975-01-01	abcde	abcde	m	1234	123.45	32412341234	113	tbhth nrzh ztfghgfh fzh ftzhj fztjh
 1980-10-14	fgbbd	dtzndtz	w	67856	5463354.67	3567845333	124	1980-10-14	fgbbd	dtzndtz	w	67856	5463354.67	3567845333	124	1980-10-14	fgbbd	dtzndtz	w	67856	5463354.67	3567845333	124	1980-10-14	fgbbd	dtzndtz	w	67856	5463354.67	3567845333	124	d,f söierugsig msireg siug ei5ggth lrutluitgzeöjrtnb.rkjthuekuhzrkuthgjdnffjmbr
 1983-12-31	cdef	srtbvsr	w	45634	13452.56	3452346456	127	1983-12-31	cdef	srtbvsr	w	45634	13452.56	3452346456	127	1983-12-31	cdef	srtbvsr	w	45634	13452.56	3452346456	127	1983-12-31	cdef	srtbvsr	w	45634	13452.56	3452346456	127	liuugbzvdmrlti b itiortudirtfgtibm dfi
-1975-01-01	abcde	abcde	m	1234	123.45	32412341234	113	1975-01-01	abcde	abcde	m	1234	123.45	32412341234	113	1975-01-01	abcde	abcde	m	1234	123.45	32412341234	113	1975-01-01	abcde	abcde	m	1234	123.45	32412341234	113	tbhth nrzh ztfghgfh fzh ftzhj fztjh
 drop table t1;
diff --git a/mysql-test/suite/pbxt/r/distinct.result b/mysql-test/suite/pbxt/r/distinct.result
index c3e8342a6e1..d95a2bb3232 100644
--- a/mysql-test/suite/pbxt/r/distinct.result
+++ b/mysql-test/suite/pbxt/r/distinct.result
@@ -175,7 +175,7 @@ explain SELECT distinct t3.a FROM t3,t2,t1 WHERE t3.a=t1.b AND t1.a=t2.a;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	SIMPLE	t1	ALL	PRIMARY	NULL	NULL	NULL	4	Using temporary
 1	SIMPLE	t2	ref	a	a	4	test.t1.a	1	Using index
-1	SIMPLE	t3	ref	a	a	5	test.t1.b	1	Using where; Using index
+1	SIMPLE	t3	ref	a	a	5	test.t1.b	1	Using index
 SELECT distinct t3.a FROM t3,t2,t1 WHERE t3.a=t1.b AND t1.a=t2.a;
 a
 1
@@ -190,7 +190,7 @@ insert into t3 select * from t4;
 explain select distinct t1.a from t1,t3 where t1.a=t3.a;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	SIMPLE	t1	index	PRIMARY	PRIMARY	4	NULL	4	Using index; Using temporary
-1	SIMPLE	t3	ref	a	a	5	test.t1.a	1	Using where; Using index; Distinct
+1	SIMPLE	t3	ref	a	a	5	test.t1.a	1	Using index; Distinct
 select distinct t1.a from t1,t3 where t1.a=t3.a;
 a
 1
diff --git a/mysql-test/suite/pbxt/r/explain.result b/mysql-test/suite/pbxt/r/explain.result
index a9907aa33fe..cd9b1149c1d 100644
--- a/mysql-test/suite/pbxt/r/explain.result
+++ b/mysql-test/suite/pbxt/r/explain.result
@@ -50,7 +50,7 @@ insert into ÔÁÂ (ËÏÌ0) values (1);
 insert into ÔÁÂ (ËÏÌ0) values (2);
 explain select ËÏÌ0 from ÔÁÂ where ËÏÌ0=1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	ÔÁÂ	ref	ÉÎÄ0,ÉÎÄ01	ÉÎÄ0	5	const	1	Using where; Using index
+1	SIMPLE	ÔÁÂ	ref	ÉÎÄ0,ÉÎÄ01	ÉÎÄ0	5	const	1	Using index
 drop table ÔÁÂ;
 set names latin1;
 select 3 into @v1;
diff --git a/mysql-test/suite/pbxt/r/heap.result b/mysql-test/suite/pbxt/r/heap.result
index 57109f0d4c8..366258882ad 100644
--- a/mysql-test/suite/pbxt/r/heap.result
+++ b/mysql-test/suite/pbxt/r/heap.result
@@ -204,7 +204,7 @@ key a (a)
 INSERT INTO t1 VALUES (10), (10), (10);
 EXPLAIN SELECT * FROM t1 WHERE a=10;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	ref	a	a	5	const	3	Using where
+1	SIMPLE	t1	ref	a	a	5	const	3	
 SELECT * FROM t1 WHERE a=10;
 a
 10
diff --git a/mysql-test/suite/pbxt/r/join.result b/mysql-test/suite/pbxt/r/join.result
index a74ee3d3b35..6b6dba69b32 100644
--- a/mysql-test/suite/pbxt/r/join.result
+++ b/mysql-test/suite/pbxt/r/join.result
@@ -774,7 +774,7 @@ insert into t3 select * from t2 where a < 800;
 explain select * from t2,t3 where t2.a < 200 and t2.b=t3.b;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	SIMPLE	t2	range	a,b	a	5	NULL	1	Using where
-1	SIMPLE	t3	ref	b	b	5	test.t2.b	1	Using where
+1	SIMPLE	t3	ref	b	b	5	test.t2.b	1	
 drop table t1, t2, t3;
 create table t1 (a int);
 insert into t1 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
diff --git a/mysql-test/suite/pbxt/r/join_nested.result b/mysql-test/suite/pbxt/r/join_nested.result
index 92dc4f8acf2..370316465de 100644
--- a/mysql-test/suite/pbxt/r/join_nested.result
+++ b/mysql-test/suite/pbxt/r/join_nested.result
@@ -74,7 +74,7 @@ WHERE t3.a=1 OR t3.c IS NULL;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	SIMPLE	t2	ALL	NULL	NULL	NULL	NULL	3	100.00	
 1	SIMPLE	t3	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where
-1	SIMPLE	t4	ALL	NULL	NULL	NULL	NULL	2	100.00	
+1	SIMPLE	t4	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where
 Warnings:
 Note	1003	select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b` from `test`.`t2` left join (`test`.`t3` join `test`.`t4`) on((`test`.`t4`.`b` = `test`.`t2`.`b`)) where ((`test`.`t3`.`a` = 1) or isnull(`test`.`t3`.`c`))
 SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b
@@ -150,7 +150,7 @@ WHERE t3.a>1 OR t3.c IS NULL;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	SIMPLE	t2	ALL	NULL	NULL	NULL	NULL	3	100.00	
 1	SIMPLE	t3	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where
-1	SIMPLE	t4	ALL	NULL	NULL	NULL	NULL	2	100.00	
+1	SIMPLE	t4	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where
 1	SIMPLE	t5	ALL	NULL	NULL	NULL	NULL	3	100.00	
 Warnings:
 Note	1003	select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b` from `test`.`t2` left join (`test`.`t3` join `test`.`t4` join `test`.`t5`) on((`test`.`t4`.`b` = `test`.`t2`.`b`)) where ((`test`.`t3`.`a` > 1) or isnull(`test`.`t3`.`c`))
@@ -180,7 +180,7 @@ WHERE (t3.a>1 OR t3.c IS NULL) AND
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	SIMPLE	t2	ALL	NULL	NULL	NULL	NULL	3	100.00	
 1	SIMPLE	t3	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where
-1	SIMPLE	t4	ALL	NULL	NULL	NULL	NULL	2	100.00	
+1	SIMPLE	t4	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where
 1	SIMPLE	t5	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
 Warnings:
 Note	1003	select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b` from `test`.`t2` left join (`test`.`t3` join `test`.`t4` join `test`.`t5`) on((`test`.`t4`.`b` = `test`.`t2`.`b`)) where (((`test`.`t3`.`a` > 1) or isnull(`test`.`t3`.`c`)) and ((`test`.`t5`.`a` < 3) or isnull(`test`.`t5`.`c`)))
@@ -230,7 +230,7 @@ ON t7.b=t8.b AND t6.b < 10;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	SIMPLE	t7	ALL	NULL	NULL	NULL	NULL	2	100.00	
 1	SIMPLE	t6	ALL	NULL	NULL	NULL	NULL	3	100.00	Using join buffer
-1	SIMPLE	t8	ALL	NULL	NULL	NULL	NULL	2	100.00	
+1	SIMPLE	t8	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where
 Warnings:
 Note	1003	select `test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b` from `test`.`t6` join `test`.`t7` left join `test`.`t8` on(((`test`.`t7`.`b` = `test`.`t8`.`b`) and (`test`.`t6`.`b` < 10))) where 1
 SELECT t6.a,t6.b,t7.a,t7.b,t8.a,t8.b
@@ -546,12 +546,12 @@ id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	SIMPLE	t0	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
 1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where; Using join buffer
 1	SIMPLE	t2	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
-1	SIMPLE	t3	ALL	NULL	NULL	NULL	NULL	2	100.00	
-1	SIMPLE	t4	ALL	NULL	NULL	NULL	NULL	2	100.00	
+1	SIMPLE	t3	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where
+1	SIMPLE	t4	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where
 1	SIMPLE	t5	ALL	NULL	NULL	NULL	NULL	3	100.00	
-1	SIMPLE	t7	ALL	NULL	NULL	NULL	NULL	2	100.00	
-1	SIMPLE	t6	ALL	NULL	NULL	NULL	NULL	3	100.00	
-1	SIMPLE	t8	ALL	NULL	NULL	NULL	NULL	2	100.00	
+1	SIMPLE	t7	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where
+1	SIMPLE	t6	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
+1	SIMPLE	t8	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where
 Warnings:
 Note	1003	select `test`.`t0`.`a` AS `a`,`test`.`t0`.`b` AS `b`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b` from `test`.`t0` join `test`.`t1` left join (`test`.`t2` left join (`test`.`t3` join `test`.`t4`) on(((`test`.`t4`.`b` = `test`.`t2`.`b`) and (`test`.`t3`.`a` = 1))) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on(((`test`.`t8`.`b` = `test`.`t5`.`b`) and (`test`.`t6`.`b` < 10)))) on(((`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t6`.`b` >= 2)))) on((((`test`.`t3`.`b` = 2) or isnull(`test`.`t3`.`c`)) and ((`test`.`t6`.`b` = 2) or isnull(`test`.`t6`.`c`)) and ((`test`.`t5`.`b` = `test`.`t0`.`b`) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t6`.`c`) or isnull(`test`.`t8`.`c`)) and (`test`.`t1`.`a` <> 2))) where ((`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t0`.`a` = 1) and ((`test`.`t2`.`a` >= 4) or isnull(`test`.`t2`.`c`)))
 SELECT t0.a,t0.b,t1.a,t1.b,t2.a,t2.b,t3.a,t3.b,t4.a,t4.b,
@@ -837,8 +837,8 @@ WHERE t1.a <= 2;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
 1	SIMPLE	t2	ALL	NULL	NULL	NULL	NULL	3	100.00	Using join buffer
-1	SIMPLE	t3	ALL	NULL	NULL	NULL	NULL	2	100.00	
-1	SIMPLE	t4	ALL	NULL	NULL	NULL	NULL	2	100.00	
+1	SIMPLE	t3	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where
+1	SIMPLE	t4	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where
 Warnings:
 Note	1003	select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b` from `test`.`t1` join `test`.`t2` left join (`test`.`t3` join `test`.`t4`) on(((`test`.`t4`.`b` = `test`.`t2`.`b`) and (`test`.`t3`.`a` = 1))) where (`test`.`t1`.`a` <= 2)
 CREATE INDEX idx_b ON t2(b);
@@ -851,7 +851,7 @@ ON t3.a=1 AND t3.b=t2.b AND t2.b=t4.b;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	SIMPLE	t3	ALL	NULL	NULL	NULL	NULL	2	100.00	
 1	SIMPLE	t4	ALL	NULL	NULL	NULL	NULL	2	100.00	Using join buffer
-1	SIMPLE	t2	ref	idx_b	idx_b	5	test.t3.b	1	100.00	
+1	SIMPLE	t2	ref	idx_b	idx_b	5	test.t3.b	1	100.00	Using where
 1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	3	100.00	
 Warnings:
 Note	1003	select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b` from `test`.`t3` join `test`.`t4` left join (`test`.`t1` join `test`.`t2`) on(((`test`.`t3`.`a` = 1) and (`test`.`t3`.`b` = `test`.`t2`.`b`) and (`test`.`t2`.`b` = `test`.`t4`.`b`))) where 1
@@ -1054,8 +1054,8 @@ t0.b=t1.b AND
 (t8.b=t9.b OR t8.c IS NULL) AND
 (t9.a=1);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
-1	SIMPLE	t0	ref	idx_a	idx_a	5	const	1	100.00	Using where
-1	SIMPLE	t1	ref	idx_b	idx_b	5	test.t0.b	1	100.00	Using where
+1	SIMPLE	t0	ref	idx_a	idx_a	5	const	1	100.00	
+1	SIMPLE	t1	ref	idx_b	idx_b	5	test.t0.b	1	100.00	
 1	SIMPLE	t2	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
 1	SIMPLE	t3	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where
 1	SIMPLE	t4	ref	idx_b	idx_b	5	test.t2.b	1	100.00	
@@ -1202,13 +1202,13 @@ test.t3	analyze	status	OK
 EXPLAIN SELECT a, b, c FROM t1 LEFT JOIN (t2, t3) ON c < 3 and b = c;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	SIMPLE	t1	index	NULL	a	5	NULL	21	Using index
-1	SIMPLE	t3	index	c	c	5	NULL	6	Using index
+1	SIMPLE	t3	index	c	c	5	NULL	6	Using where; Using index
 1	SIMPLE	t2	ref	b	b	5	test.t3.c	1	Using index
 EXPLAIN SELECT a, b, c FROM t1 LEFT JOIN (t2, t3) ON b < 3 and b = c;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	SIMPLE	t1	index	NULL	a	5	NULL	#	Using index
 1	SIMPLE	t3	index	c	c	5	NULL	#	Using index
-1	SIMPLE	t2	ref	b	b	5	test.t3.c	#	Using index
+1	SIMPLE	t2	ref	b	b	5	test.t3.c	#	Using where; Using index
 SELECT a, b, c FROM t1 LEFT JOIN (t2, t3) ON b < 3 and b = c;
 a	b	c
 NULL	0	0
@@ -1279,7 +1279,7 @@ EXPLAIN SELECT a, b, c FROM t1 LEFT JOIN (t2, t3) ON b < 3 and b = c;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	SIMPLE	t1	index	NULL	a	5	NULL	#	Using index
 1	SIMPLE	t3	index	c	c	5	NULL	#	Using index
-1	SIMPLE	t2	ref	b	b	5	test.t3.c	#	Using index
+1	SIMPLE	t2	ref	b	b	5	test.t3.c	#	Using where; Using index
 SELECT a, b, c FROM t1 LEFT JOIN (t2, t3) ON b < 3 and b = c;
 a	b	c
 NULL	NULL	NULL
@@ -1323,8 +1323,8 @@ c11	c21	c31
 EXPLAIN SELECT * FROM t1 LEFT JOIN (t2 LEFT JOIN t3 ON c21=c31) ON c11=c21;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	2	
-1	SIMPLE	t2	ALL	NULL	NULL	NULL	NULL	0	
-1	SIMPLE	t3	ALL	NULL	NULL	NULL	NULL	0	
+1	SIMPLE	t2	ALL	NULL	NULL	NULL	NULL	0	Using where
+1	SIMPLE	t3	ALL	NULL	NULL	NULL	NULL	0	Using where
 DROP TABLE t1,t2,t3;
 CREATE TABLE t1 (goods int(12) NOT NULL, price varchar(128) NOT NULL);
 INSERT INTO t1 VALUES (23, 2340), (26, 9900);
diff --git a/mysql-test/suite/pbxt/r/key_cache.result b/mysql-test/suite/pbxt/r/key_cache.result
index 5ff41bd29d7..703389ac763 100644
--- a/mysql-test/suite/pbxt/r/key_cache.result
+++ b/mysql-test/suite/pbxt/r/key_cache.result
@@ -122,7 +122,7 @@ i
 explain select count(*) from t1, t2 where t1.p = t2.i;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	SIMPLE	t1	index	PRIMARY	PRIMARY	4	NULL	2	Using index
-1	SIMPLE	t2	ref	k1	k1	5	test.t1.p	1	Using where; Using index
+1	SIMPLE	t2	ref	k1	k1	5	test.t1.p	1	Using index
 select count(*) from t1, t2 where t1.p = t2.i;
 count(*)
 3
diff --git a/mysql-test/suite/pbxt/r/negation_elimination.result b/mysql-test/suite/pbxt/r/negation_elimination.result
index f8a6b0f764d..74fb4579806 100644
--- a/mysql-test/suite/pbxt/r/negation_elimination.result
+++ b/mysql-test/suite/pbxt/r/negation_elimination.result
@@ -79,7 +79,7 @@ a
 19
 explain select * from t1 where not(a != 10);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	ref	a	a	5	const	1	Using where; Using index
+1	SIMPLE	t1	ref	a	a	5	const	1	Using index
 select * from t1 where not(a != 1);
 a
 1
diff --git a/mysql-test/suite/pbxt/r/null.result b/mysql-test/suite/pbxt/r/null.result
index 036ba01ed1d..657022e6f2b 100644
--- a/mysql-test/suite/pbxt/r/null.result
+++ b/mysql-test/suite/pbxt/r/null.result
@@ -170,7 +170,7 @@ insert into t1 select i*2 from t1;
 insert into t1 values(null);
 explain select * from t1 where i=2 or i is null;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	ref_or_null	i	i	5	const	#	Using where; Using index
+1	SIMPLE	t1	ref_or_null	i	i	5	const	#	Using index
 select count(*) from t1 where i=2 or i is null;
 count(*)
 10
diff --git a/mysql-test/suite/pbxt/r/null_key.result b/mysql-test/suite/pbxt/r/null_key.result
index 753ebf31f1c..1d5dfa39761 100644
--- a/mysql-test/suite/pbxt/r/null_key.result
+++ b/mysql-test/suite/pbxt/r/null_key.result
@@ -21,10 +21,10 @@ id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	SIMPLE	t1	range	a,b	a	9	NULL	3	Using where; Using index
 explain select * from t1 where (a is null or a = 7) and b=7;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	ref_or_null	a,b	a	9	const,const	2	Using where; Using index
+1	SIMPLE	t1	ref_or_null	a,b	a	9	const,const	2	Using index
 explain select * from t1 where (a is null or a = 7) and b=7 order by a;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	ref_or_null	a,b	a	9	const,const	2	Using where; Using index; Using filesort
+1	SIMPLE	t1	ref_or_null	a,b	a	9	const,const	2	Using index; Using filesort
 explain select * from t1 where (a is null and b>a) or a is null and b=7 limit 2;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	SIMPLE	t1	ref	a,b	a	5	const	3	Using where; Using index
@@ -151,7 +151,7 @@ alter table t1 modify b int null;
 insert into t1 values (7,null), (8,null), (8,7);
 explain select * from t1 where a = 7 and (b=7 or b is null);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	ref_or_null	a,b	a	10	const,const	2	Using where; Using index
+1	SIMPLE	t1	ref_or_null	a,b	a	10	const,const	2	Using index
 select * from t1 where a = 7 and (b=7 or b is null);
 a	b
 7	7
@@ -166,7 +166,7 @@ a	b
 NULL	7
 explain select * from t1 where (a = 7 or a is null) and (a = 7 or a is null);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	ref_or_null	a	a	5	const	5	Using where; Using index
+1	SIMPLE	t1	ref_or_null	a	a	5	const	5	Using index
 select * from t1 where (a = 7 or a is null) and (a = 7 or a is null);
 a	b
 7	NULL
@@ -192,7 +192,7 @@ a	a	b
 explain select * from t2,t1 where t1.a=t2.a and (b= 7 or b is null);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	SIMPLE	t2	ALL	NULL	NULL	NULL	NULL	2	
-1	SIMPLE	t1	ref_or_null	a	a	10	test.t2.a,const	4	Using where; Using index
+1	SIMPLE	t1	ref_or_null	a	a	10	test.t2.a,const	4	Using index
 select * from t2,t1 where t1.a=t2.a and (b= 7 or b is null);
 a	a	b
 7	7	7
@@ -202,7 +202,7 @@ a	a	b
 explain select * from t2,t1 where (t1.a=t2.a or t1.a is null) and b= 7;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	SIMPLE	t2	ALL	NULL	NULL	NULL	NULL	2	
-1	SIMPLE	t1	ref_or_null	a	a	10	test.t2.a,const	4	Using where; Using index
+1	SIMPLE	t1	ref_or_null	a	a	10	test.t2.a,const	4	Using index
 select * from t2,t1 where (t1.a=t2.a or t1.a is null) and b= 7;
 a	a	b
 7	7	7
@@ -226,7 +226,7 @@ delete from t1 where a=8;
 explain select * from t2,t1 where t1.a=t2.a or t1.a is null;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	SIMPLE	t2	ALL	NULL	NULL	NULL	NULL	4	
-1	SIMPLE	t1	ref_or_null	a	a	5	test.t2.a	4	Using where; Using index
+1	SIMPLE	t1	ref_or_null	a	a	5	test.t2.a	4	Using index
 explain select * from t2,t1 where t1.a<=>t2.a or (t1.a is null and t1.b <> 9);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	SIMPLE	t2	ALL	NULL	NULL	NULL	NULL	4	
@@ -258,7 +258,7 @@ INSERT INTO t1 VALUES (1,NULL),(2,NULL),(3,1),(4,2),(5,NULL),(6,NULL),(7,3),(8,4
 INSERT INTO t2 VALUES (1,NULL),(2,NULL),(3,1),(4,2),(5,NULL),(6,NULL),(7,3),(8,4),(9,NULL),(10,NULL);
 explain select id from t1 where uniq_id is null;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	ref	idx1	idx1	5	const	5	Using where
+1	SIMPLE	t1	ref	idx1	idx1	5	const	5	Using index condition
 explain select id from t1 where uniq_id =1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	SIMPLE	t1	const	idx1	idx1	5	const	1	
diff --git a/mysql-test/t/myisam_mrr.test b/mysql-test/t/myisam_mrr.test
index 57616a8bc7c..25b0fc4af23 100644
--- a/mysql-test/t/myisam_mrr.test
+++ b/mysql-test/t/myisam_mrr.test
@@ -8,7 +8,6 @@ drop table if exists t1, t2, t3;
 
 set @read_rnd_buffer_size_save= @@read_rnd_buffer_size;
 set read_rnd_buffer_size=79;
-select @@read_rnd_buffer_size;
 
 -- source include/mrr_tests.inc