Adjusted some results from the vcol, pbxt, maria test suites after

the fix for bug 52636.

mysql-test/suite/maria/r/maria.result

@@ -381,7 +381,7 @@ id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	SIMPLE	t1	ref	a	a	4	test.t2.a	3	
 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	t2	ALL	b	NULL	NULL	NULL	2	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

mysql-test/suite/pbxt/r/select_safe.result

@@ -71,12 +71,12 @@ test.t1	analyze	status	OK
 insert into t1 values (null,"a"),(null,"a"),(null,"a"),(null,"a"),(null,"a"),(null,"a"),(null,"a"),(null,"a"),(null,"a"),(null,"a");
 explain select STRAIGHT_JOIN * from t1,t1 as t2 where t1.b=t2.b;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	ALL	b	NULL	NULL	NULL	21	
+1	SIMPLE	t1	ALL	b	NULL	NULL	NULL	21	Using where
 1	SIMPLE	t2	ref	b	b	21	test.t1.b	1	
 set MAX_SEEKS_FOR_KEY=1;
 explain select STRAIGHT_JOIN * from t1,t1 as t2 where t1.b=t2.b;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	ALL	b	NULL	NULL	NULL	21	
+1	SIMPLE	t1	ALL	b	NULL	NULL	NULL	21	Using where
 1	SIMPLE	t2	ref	b	b	21	test.t1.b	1	
 SET MAX_SEEKS_FOR_KEY=DEFAULT;
 drop table t1, t2;

mysql-test/suite/pbxt/r/subselect.result

@@ -1334,7 +1334,7 @@ a
 4
 explain extended select * from t2 where t2.a in (select a from t1);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
-1	PRIMARY	t2	index	a	a	5	NULL	4	100.00	Using index
+1	PRIMARY	t2	index	a	a	5	NULL	4	100.00	Using where; Using index
 1	PRIMARY	t1	ref	a	a	5	test.t2.a	1	100.00	Using index; FirstMatch(t2)
 Warnings:
 Note	1003	select `test`.`t2`.`a` AS `a` from `test`.`t2` semi join (`test`.`t1`) where (`test`.`t1`.`a` = `test`.`t2`.`a`)
@@ -1344,7 +1344,7 @@ a
 4
 explain extended select * from t2 where t2.a in (select a from t1 where t1.b <> 30);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
-1	PRIMARY	t2	index	a	a	5	NULL	4	100.00	Using index
+1	PRIMARY	t2	index	a	a	5	NULL	4	100.00	Using where; Using index
 1	PRIMARY	t1	ref	a	a	5	test.t2.a	1	100.00	Using where; Using index; FirstMatch(t2)
 Warnings:
 Note	1003	select `test`.`t2`.`a` AS `a` from `test`.`t2` semi join (`test`.`t1`) where ((`test`.`t1`.`a` = `test`.`t2`.`a`) and (`test`.`t1`.`b` <> 30))
@@ -1354,8 +1354,8 @@ a
 3
 explain extended select * from t2 where t2.a in (select t1.a from t1,t3 where t1.b=t3.a);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
-1	PRIMARY	t2	index	a	a	5	NULL	4	100.00	Using index
-1	PRIMARY	t1	ref	a	a	5	test.t2.a	1	100.00	Using index
+1	PRIMARY	t2	index	a	a	5	NULL	4	100.00	Using where; Using index
+1	PRIMARY	t1	ref	a	a	5	test.t2.a	1	100.00	Using where; Using index
 1	PRIMARY	t3	ref	a	a	5	test.t1.b	1	100.00	Using index; FirstMatch(t2)
 Warnings:
 Note	1003	select `test`.`t2`.`a` AS `a` from `test`.`t2` semi join (`test`.`t1` join `test`.`t3`) where ((`test`.`t1`.`a` = `test`.`t2`.`a`) and (`test`.`t3`.`a` = `test`.`t1`.`b`))
@@ -1371,7 +1371,7 @@ a
 4
 explain extended select * from t2 where t2.a in (select a from t1 where t1.b <> 30);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
-1	PRIMARY	t2	index	a	a	5	NULL	4	100.00	Using index
+1	PRIMARY	t2	index	a	a	5	NULL	4	100.00	Using where; Using index
 1	PRIMARY	t1	ref	a	a	5	test.t2.a	1	100.00	Using where; Using index; FirstMatch(t2)
 Warnings:
 Note	1003	select `test`.`t2`.`a` AS `a` from `test`.`t2` semi join (`test`.`t1`) where ((`test`.`t1`.`a` = `test`.`t2`.`a`) and (`test`.`t1`.`b` <> 30))
@@ -4222,7 +4222,7 @@ CREATE INDEX I1 ON t1 (a);
 CREATE INDEX I2 ON t1 (b);
 EXPLAIN SELECT a,b FROM t1 WHERE b IN (SELECT a FROM t1);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	PRIMARY	t1	index	I1	I1	2	NULL	2	Using index; LooseScan
+1	PRIMARY	t1	index	I1	I1	2	NULL	2	Using where; Using index; LooseScan
 1	PRIMARY	t1	ref	I2	I2	13	test.t1.a	1	Using where
 SELECT a,b FROM t1 WHERE b IN (SELECT a FROM t1);
 a	b
@@ -4232,7 +4232,7 @@ CREATE INDEX I1 ON t2 (a);
 CREATE INDEX I2 ON t2 (b);
 EXPLAIN SELECT a,b FROM t2 WHERE b IN (SELECT a FROM t2);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	PRIMARY	t2	index	I1	I1	4	NULL	2	Using index; LooseScan
+1	PRIMARY	t2	index	I1	I1	4	NULL	2	Using where; Using index; LooseScan
 1	PRIMARY	t2	ref	I2	I2	13	test.t2.a	1	Using where
 SELECT a,b FROM t2 WHERE b IN (SELECT a FROM t2);
 a	b

mysql-test/suite/vcol/r/vcol_misc.result

@@ -9,7 +9,7 @@ set join_cache_level=6;
 explain
 select * from t1,t2 where t1.b=t2.c and d <= 100;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	3	
+1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	3	Using where
 1	SIMPLE	t2	ref	idx	idx	5	test.t1.b	2	Using where; Using join buffer
 select * from t1,t2 where t1.b=t2.c and d <= 100;
 a	b	c	d	v