Changed "const row not found" to "Const row not found"

Also changed Unique row not found to use uppercase first.
This was done to make these messages consistent with the rest

mysql-test/r/analyze_stmt_privileges2.result

@@ -1452,7 +1452,7 @@ id	select_type	table	type	possible_keys	key	key_len	ref	rows	r_rows	filtered	r_f
 DELETE FROM t1 USING t1, t2;
 EXPLAIN DELETE FROM t1 USING t1, t2;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	system	NULL	NULL	NULL	NULL	0	const row not found
+1	SIMPLE	t1	system	NULL	NULL	NULL	NULL	0	Const row not found
 1	SIMPLE	t2	ALL	NULL	NULL	NULL	NULL	3	
 ANALYZE DELETE FROM t1 USING t1, t2;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	r_rows	filtered	r_filtered	Extra
@@ -1797,7 +1797,7 @@ id	select_type	table	type	possible_keys	key	key_len	ref	rows	r_rows	filtered	r_f
 DELETE FROM t1 USING t1, t2;
 EXPLAIN DELETE FROM t1 USING t1, t2;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	system	NULL	NULL	NULL	NULL	0	const row not found
+1	SIMPLE	t1	system	NULL	NULL	NULL	NULL	0	Const row not found
 1	SIMPLE	t2	ALL	NULL	NULL	NULL	NULL	3	
 ANALYZE DELETE FROM t1 USING t1, t2;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	r_rows	filtered	r_filtered	Extra
@@ -1813,7 +1813,7 @@ SELECT * FROM t1;
 a	b
 EXPLAIN SELECT * FROM t1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	system	NULL	NULL	NULL	NULL	0	const row not found
+1	SIMPLE	t1	system	NULL	NULL	NULL	NULL	0	Const row not found
 ANALYZE SELECT * FROM t1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	r_rows	filtered	r_filtered	Extra
 1	SIMPLE	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	no matching row in const table

mysql-test/r/derived.result

@@ -896,34 +896,34 @@ WHERE REF IS NULL AND DIVISION="MIS" GROUP BY RECEIVABLE_GROUP,DIVISION,CLIENT_N
 A.DIVISION=C1.DIVISION AND A.RECEIVABLE_GROUP=C1.RECEIVABLE_GROUP AND A.CREDIT_LIMIT=C1.CREDIT_LIMIT
 ORDER BY TOTAL DESC;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	PRIMARY	<derived2>	system	NULL	NULL	NULL	NULL	0	const row not found
-1	PRIMARY	<derived3>	system	NULL	NULL	NULL	NULL	0	const row not found
-1	PRIMARY	<derived4>	system	NULL	NULL	NULL	NULL	0	const row not found
-1	PRIMARY	<derived5>	system	NULL	NULL	NULL	NULL	0	const row not found
-1	PRIMARY	<derived6>	system	NULL	NULL	NULL	NULL	0	const row not found
-1	PRIMARY	<derived7>	system	NULL	NULL	NULL	NULL	0	const row not found
-1	PRIMARY	<derived8>	system	NULL	NULL	NULL	NULL	0	const row not found
-1	PRIMARY	<derived9>	system	NULL	NULL	NULL	NULL	0	const row not found
-1	PRIMARY	<derived10>	system	NULL	NULL	NULL	NULL	0	const row not found
-1	PRIMARY	<derived11>	system	NULL	NULL	NULL	NULL	0	const row not found
-1	PRIMARY	<derived12>	system	NULL	NULL	NULL	NULL	0	const row not found
-1	PRIMARY	<derived13>	system	NULL	NULL	NULL	NULL	0	const row not found
-1	PRIMARY	<derived14>	system	NULL	NULL	NULL	NULL	0	const row not found
-1	PRIMARY	<derived15>	system	NULL	NULL	NULL	NULL	0	const row not found
-1	PRIMARY	<derived16>	system	NULL	NULL	NULL	NULL	0	const row not found
-1	PRIMARY	<derived17>	system	NULL	NULL	NULL	NULL	0	const row not found
-1	PRIMARY	<derived18>	system	NULL	NULL	NULL	NULL	0	const row not found
-1	PRIMARY	<derived19>	system	NULL	NULL	NULL	NULL	0	const row not found
-1	PRIMARY	<derived20>	system	NULL	NULL	NULL	NULL	0	const row not found
-1	PRIMARY	<derived21>	system	NULL	NULL	NULL	NULL	0	const row not found
-1	PRIMARY	<derived22>	system	NULL	NULL	NULL	NULL	0	const row not found
-1	PRIMARY	<derived23>	system	NULL	NULL	NULL	NULL	0	const row not found
-1	PRIMARY	<derived24>	system	NULL	NULL	NULL	NULL	0	const row not found
-1	PRIMARY	<derived25>	system	NULL	NULL	NULL	NULL	0	const row not found
-1	PRIMARY	<derived26>	system	NULL	NULL	NULL	NULL	0	const row not found
-1	PRIMARY	<derived27>	system	NULL	NULL	NULL	NULL	0	const row not found
-1	PRIMARY	<derived28>	system	NULL	NULL	NULL	NULL	0	const row not found
-1	PRIMARY	<derived29>	system	NULL	NULL	NULL	NULL	0	const row not found
+1	PRIMARY	<derived2>	system	NULL	NULL	NULL	NULL	0	Const row not found
+1	PRIMARY	<derived3>	system	NULL	NULL	NULL	NULL	0	Const row not found
+1	PRIMARY	<derived4>	system	NULL	NULL	NULL	NULL	0	Const row not found
+1	PRIMARY	<derived5>	system	NULL	NULL	NULL	NULL	0	Const row not found
+1	PRIMARY	<derived6>	system	NULL	NULL	NULL	NULL	0	Const row not found
+1	PRIMARY	<derived7>	system	NULL	NULL	NULL	NULL	0	Const row not found
+1	PRIMARY	<derived8>	system	NULL	NULL	NULL	NULL	0	Const row not found
+1	PRIMARY	<derived9>	system	NULL	NULL	NULL	NULL	0	Const row not found
+1	PRIMARY	<derived10>	system	NULL	NULL	NULL	NULL	0	Const row not found
+1	PRIMARY	<derived11>	system	NULL	NULL	NULL	NULL	0	Const row not found
+1	PRIMARY	<derived12>	system	NULL	NULL	NULL	NULL	0	Const row not found
+1	PRIMARY	<derived13>	system	NULL	NULL	NULL	NULL	0	Const row not found
+1	PRIMARY	<derived14>	system	NULL	NULL	NULL	NULL	0	Const row not found
+1	PRIMARY	<derived15>	system	NULL	NULL	NULL	NULL	0	Const row not found
+1	PRIMARY	<derived16>	system	NULL	NULL	NULL	NULL	0	Const row not found
+1	PRIMARY	<derived17>	system	NULL	NULL	NULL	NULL	0	Const row not found
+1	PRIMARY	<derived18>	system	NULL	NULL	NULL	NULL	0	Const row not found
+1	PRIMARY	<derived19>	system	NULL	NULL	NULL	NULL	0	Const row not found
+1	PRIMARY	<derived20>	system	NULL	NULL	NULL	NULL	0	Const row not found
+1	PRIMARY	<derived21>	system	NULL	NULL	NULL	NULL	0	Const row not found
+1	PRIMARY	<derived22>	system	NULL	NULL	NULL	NULL	0	Const row not found
+1	PRIMARY	<derived23>	system	NULL	NULL	NULL	NULL	0	Const row not found
+1	PRIMARY	<derived24>	system	NULL	NULL	NULL	NULL	0	Const row not found
+1	PRIMARY	<derived25>	system	NULL	NULL	NULL	NULL	0	Const row not found
+1	PRIMARY	<derived26>	system	NULL	NULL	NULL	NULL	0	Const row not found
+1	PRIMARY	<derived27>	system	NULL	NULL	NULL	NULL	0	Const row not found
+1	PRIMARY	<derived28>	system	NULL	NULL	NULL	NULL	0	Const row not found
+1	PRIMARY	<derived29>	system	NULL	NULL	NULL	NULL	0	Const row not found
 29	DERIVED	NULL	NULL	NULL	NULL	NULL	NULL	NULL	no matching row in const table
 28	DERIVED	NULL	NULL	NULL	NULL	NULL	NULL	NULL	no matching row in const table
 27	DERIVED	NULL	NULL	NULL	NULL	NULL	NULL	NULL	no matching row in const table

mysql-test/r/derived_view.result

@@ -2014,7 +2014,7 @@ SELECT t.b, t.c, t1.a
 FROM t1, (SELECT t2.b, t2.c FROM t3 RIGHT JOIN t2 ON t2.a = t3.b) AS t
 WHERE t.b AND t.c = t1.a;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
-1	SIMPLE	t3	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
+1	SIMPLE	t3	system	NULL	NULL	NULL	NULL	0	0.00	Const row not found
 1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	2	100.00	
 1	SIMPLE	t2	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where; Using join buffer (flat, BNL join)
 Warnings:
@@ -2029,7 +2029,7 @@ SELECT t.b, t.c, t1.a
 FROM t1, (SELECT t2.b, t2.c FROM t3 RIGHT JOIN t2 ON t2.a = t3.b) AS t
 WHERE t.b <> 0 AND t.c = t1.a;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
-1	SIMPLE	t3	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
+1	SIMPLE	t3	system	NULL	NULL	NULL	NULL	0	0.00	Const row not found
 1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	2	100.00	
 1	SIMPLE	t2	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where; Using join buffer (flat, BNL join)
 Warnings:

mysql-test/r/explain.result

@@ -2,7 +2,7 @@ drop table if exists t1;
 create table t1 (id int not null, str char(10), unique(str));
 explain select * from t1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	system	NULL	NULL	NULL	NULL	0	const row not found
+1	SIMPLE	t1	system	NULL	NULL	NULL	NULL	0	Const row not found
 insert into t1 values (1, null),(2, null),(3, "foo"),(4, "bar");
 select * from t1 where str is null;
 id	str
@@ -218,8 +218,8 @@ EXPLAIN EXTENDED SELECT 1 FROM t1
 WHERE f1 > ALL( SELECT t.f1 FROM t1,t1 AS t );
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	PRIMARY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Impossible WHERE noticed after reading const tables
-2	SUBQUERY	t1	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
-2	SUBQUERY	t	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
+2	SUBQUERY	t1	system	NULL	NULL	NULL	NULL	0	0.00	Const row not found
+2	SUBQUERY	t	system	NULL	NULL	NULL	NULL	0	0.00	Const row not found
 Warnings:
 Note	1003	/* select#1 */ select 1 AS `1` from `test`.`t1` where 0
 SET SESSION sql_mode=@old_sql_mode;
@@ -387,7 +387,7 @@ set optimizer_switch='derived_merge=off,derived_with_keys=off';
 EXPLAIN EXTENDED
 SELECT * FROM ( SELECT t1.a FROM t1,t2 WHERE t2.a = t1.a ) AS t;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
-1	PRIMARY	<derived2>	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
+1	PRIMARY	<derived2>	system	NULL	NULL	NULL	NULL	0	0.00	Const row not found
 2	DERIVED	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	no matching row in const table
 Warnings:
 Note	1003	/* select#1 */ select NULL AS `a` from (/* select#2 */ select NULL AS `a` from `test`.`t1` where 0) `t`

mysql-test/r/explain_json.result

@@ -1204,7 +1204,7 @@ create table t1 (i int) engine=myisam;
 explain 
 select * from t1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	system	NULL	NULL	NULL	NULL	0	const row not found
+1	SIMPLE	t1	system	NULL	NULL	NULL	NULL	0	Const row not found
 explain format=json
 select * from t1;
 EXPLAIN

mysql-test/r/func_group.result

@@ -2066,7 +2066,7 @@ HAVING ('m') IN (
 SELECT v
 FROM t2);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	PRIMARY	<derived2>	system	NULL	NULL	NULL	NULL	0	const row not found
+1	PRIMARY	<derived2>	system	NULL	NULL	NULL	NULL	0	Const row not found
 3	MATERIALIZED	t2	ALL	NULL	NULL	NULL	NULL	2	
 2	DERIVED	NULL	NULL	NULL	NULL	NULL	NULL	NULL	no matching row in const table
 set optimizer_switch=@tmp_optimizer_switch;

mysql-test/r/func_group_innodb.result

@@ -125,14 +125,14 @@ select 1, max(1) from t1i where 1=99;
 1	NULL
 explain select count(*), min(7), max(7) from t1m, t1i;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1m	system	NULL	NULL	NULL	NULL	0	const row not found
+1	SIMPLE	t1m	system	NULL	NULL	NULL	NULL	0	Const row not found
 1	SIMPLE	t1i	ALL	NULL	NULL	NULL	NULL	1	
 select count(*), min(7), max(7) from t1m, t1i;
 count(*)	min(7)	max(7)
 0	NULL	NULL
 explain select count(*), min(7), max(7) from t1m, t2i;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1m	system	NULL	NULL	NULL	NULL	0	const row not found
+1	SIMPLE	t1m	system	NULL	NULL	NULL	NULL	0	Const row not found
 1	SIMPLE	t2i	ALL	NULL	NULL	NULL	NULL	1	
 select count(*), min(7), max(7) from t1m, t2i;
 count(*)	min(7)	max(7)

mysql-test/r/func_str.result

@@ -1340,12 +1340,12 @@ DROP TABLE t1;
 create table t1(f1 varchar(4));
 explain extended select encode(f1,'zxcv') as 'enc' from t1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
-1	SIMPLE	t1	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
+1	SIMPLE	t1	system	NULL	NULL	NULL	NULL	0	0.00	Const row not found
 Warnings:
 Note	1003	select encode(NULL,'zxcv') AS `enc` from `test`.`t1`
 explain extended select decode(f1,'zxcv') as 'enc' from t1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
-1	SIMPLE	t1	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
+1	SIMPLE	t1	system	NULL	NULL	NULL	NULL	0	0.00	Const row not found
 Warnings:
 Note	1003	select decode(NULL,'zxcv') AS `enc` from `test`.`t1`
 drop table t1;

mysql-test/r/join_nested.result

@@ -1321,7 +1321,7 @@ c11	c21
 5	NULL
 EXPLAIN SELECT * FROM t1 LEFT JOIN t2 ON c11=c21;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t2	system	NULL	NULL	NULL	NULL	0	const row not found
+1	SIMPLE	t2	system	NULL	NULL	NULL	NULL	0	Const row not found
 1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	2	
 SELECT * FROM t1 LEFT JOIN (t2 LEFT JOIN t3 ON c21=c31) ON c11=c21;
 c11	c21	c31

mysql-test/r/join_nested_jcl6.result

@@ -1332,7 +1332,7 @@ c11	c21
 5	NULL
 EXPLAIN SELECT * FROM t1 LEFT JOIN t2 ON c11=c21;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t2	system	NULL	NULL	NULL	NULL	0	const row not found
+1	SIMPLE	t2	system	NULL	NULL	NULL	NULL	0	Const row not found
 1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	2	
 SELECT * FROM t1 LEFT JOIN (t2 LEFT JOIN t3 ON c21=c31) ON c11=c21;
 c11	c21	c31

mysql-test/r/limit_rows_examined.result

@@ -98,11 +98,11 @@ create table t0 (c0 int);
 explain
 select * from t0 LIMIT ROWS EXAMINED 0;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t0	system	NULL	NULL	NULL	NULL	0	const row not found
+1	SIMPLE	t0	system	NULL	NULL	NULL	NULL	0	Const row not found
 explain
 select * from t0 LIMIT ROWS EXAMINED 1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t0	system	NULL	NULL	NULL	NULL	0	const row not found
+1	SIMPLE	t0	system	NULL	NULL	NULL	NULL	0	Const row not found
 select * from t0 LIMIT ROWS EXAMINED 1;
 c0
 drop table t0;
@@ -592,7 +592,7 @@ create table t3_empty like t3;
 explain
 select max(c1) from t3_empty LIMIT ROWS EXAMINED 0;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t3_empty	system	NULL	NULL	NULL	NULL	0	const row not found
+1	SIMPLE	t3_empty	system	NULL	NULL	NULL	NULL	0	Const row not found
 select max(c1) from t3_empty LIMIT ROWS EXAMINED 0;
 max(c1)
 NULL

mysql-test/r/myisam_explain_non_select_all.result

@@ -2184,13 +2184,13 @@ INSERT INTO t1 VALUES (1, 1, 10), (2, 2, 20);
 #
 EXPLAIN UPDATE        t1 LEFT JOIN t2 ON t1.c1 = t2.c1 SET t2.c2 = 10;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t2	system	NULL	NULL	NULL	NULL	0	const row not found
+1	SIMPLE	t2	system	NULL	NULL	NULL	NULL	0	Const row not found
 1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	2	
 FLUSH STATUS;
 FLUSH TABLES;
 EXPLAIN EXTENDED UPDATE        t1 LEFT JOIN t2 ON t1.c1 = t2.c1 SET t2.c2 = 10;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
-1	SIMPLE	t2	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
+1	SIMPLE	t2	system	NULL	NULL	NULL	NULL	0	0.00	Const row not found
 1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	2	100.00	
 # Status of EXPLAIN EXTENDED query
 Variable_name	Value
@@ -2199,7 +2199,7 @@ FLUSH STATUS;
 FLUSH TABLES;
 EXPLAIN EXTENDED SELECT * FROM t1 LEFT JOIN t2 ON t1.c1 = t2.c1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
-1	SIMPLE	t2	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
+1	SIMPLE	t2	system	NULL	NULL	NULL	NULL	0	0.00	Const row not found
 1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	2	100.00	
 Warnings:
 Note	1003	select `test`.`t1`.`c1` AS `c1`,`test`.`t1`.`c2` AS `c2`,`test`.`t1`.`c3` AS `c3`,NULL AS `c1`,NULL AS `c2` from `test`.`t1`
@@ -2219,13 +2219,13 @@ Handler_read_rnd_next	4
 #
 EXPLAIN UPDATE        t1 LEFT JOIN t2 ON t1.c1 = t2.c1 SET t2.c2 = 10 WHERE t1.c3 = 10;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t2	system	NULL	NULL	NULL	NULL	0	const row not found
+1	SIMPLE	t2	system	NULL	NULL	NULL	NULL	0	Const row not found
 1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	2	Using where
 FLUSH STATUS;
 FLUSH TABLES;
 EXPLAIN EXTENDED UPDATE        t1 LEFT JOIN t2 ON t1.c1 = t2.c1 SET t2.c2 = 10 WHERE t1.c3 = 10;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
-1	SIMPLE	t2	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
+1	SIMPLE	t2	system	NULL	NULL	NULL	NULL	0	0.00	Const row not found
 1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where
 # Status of EXPLAIN EXTENDED query
 Variable_name	Value
@@ -2234,7 +2234,7 @@ FLUSH STATUS;
 FLUSH TABLES;
 EXPLAIN EXTENDED SELECT * FROM t1 LEFT JOIN t2 ON t1.c1 = t2.c1                WHERE t1.c3 = 10;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
-1	SIMPLE	t2	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
+1	SIMPLE	t2	system	NULL	NULL	NULL	NULL	0	0.00	Const row not found
 1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where
 Warnings:
 Note	1003	select `test`.`t1`.`c1` AS `c1`,`test`.`t1`.`c2` AS `c2`,`test`.`t1`.`c3` AS `c3`,NULL AS `c1`,NULL AS `c2` from `test`.`t1` where `test`.`t1`.`c3` = 10
@@ -2571,12 +2571,12 @@ CREATE VIEW v1 (x) AS SELECT b FROM t2;
 #
 EXPLAIN INSERT INTO v1 SELECT * FROM t1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	system	NULL	NULL	NULL	NULL	0	const row not found
+1	SIMPLE	t1	system	NULL	NULL	NULL	NULL	0	Const row not found
 FLUSH STATUS;
 FLUSH TABLES;
 EXPLAIN EXTENDED INSERT INTO v1 SELECT * FROM t1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
-1	SIMPLE	t1	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
+1	SIMPLE	t1	system	NULL	NULL	NULL	NULL	0	0.00	Const row not found
 # Status of EXPLAIN EXTENDED query
 Variable_name	Value
 Handler_read_rnd_next	1
@@ -2584,7 +2584,7 @@ FLUSH STATUS;
 FLUSH TABLES;
 EXPLAIN EXTENDED SELECT * FROM t1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
-1	SIMPLE	t1	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
+1	SIMPLE	t1	system	NULL	NULL	NULL	NULL	0	0.00	Const row not found
 Warnings:
 Note	1003	select NULL AS `a` from `test`.`t1`
 # Status of EXPLAIN EXTENDED "equivalent" SELECT query execution
@@ -2781,7 +2781,7 @@ CREATE TABLE t2 (id INT);
 INSERT INTO t1 VALUES (1), (2);
 EXPLAIN SELECT * FROM t1 LEFT JOIN t2 USING(id) GROUP BY t1.id;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t2	system	NULL	NULL	NULL	NULL	0	const row not found; Using temporary; Using filesort
+1	SIMPLE	t2	system	NULL	NULL	NULL	NULL	0	Const row not found; Using temporary; Using filesort
 1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	2	
 DROP TABLE t1,t2;
 #74
@@ -2879,7 +2879,7 @@ CALL p16();
 DROP PROCEDURE p16;
 CALL p15();
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	system	NULL	NULL	NULL	NULL	0	const row not found
+1	SIMPLE	t1	system	NULL	NULL	NULL	NULL	0	Const row not found
 DROP PROCEDURE p15;
 CALL p14();
 DROP PROCEDURE p14;

mysql-test/r/order_by.result

@@ -2635,7 +2635,7 @@ SELECT t1.*, t2.* FROM t1 JOIN t2 ON t1.i1 = t2.i2
 LEFT JOIN t3 ON t2.i2 = t3.i3
 ORDER BY t1.i1 LIMIT 5;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
-1	SIMPLE	t3	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
+1	SIMPLE	t3	system	NULL	NULL	NULL	NULL	0	0.00	Const row not found
 1	SIMPLE	t1	index	PRIMARY	PRIMARY	4	NULL	5	100.00	Using index
 1	SIMPLE	t2	eq_ref	PRIMARY	PRIMARY	4	test.t1.i1	1	100.00	Using index
 Warnings:

mysql-test/r/partition_pruning.result

@@ -3136,7 +3136,7 @@ drop table t2;
 create table t1 (s1 int);
 explain partitions select 1 from t1 union all select 2;
 id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	Extra
-1	PRIMARY	t1	NULL	system	NULL	NULL	NULL	NULL	0	const row not found
+1	PRIMARY	t1	NULL	system	NULL	NULL	NULL	NULL	0	Const row not found
 2	UNION	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used
 drop table t1;
 create table t1 (a bigint unsigned not null) partition by range(a) (

mysql-test/r/query_cache.result

@@ -235,7 +235,7 @@ select benchmark(1,1) from t1;
 benchmark(1,1)
 explain extended select benchmark(1,1) from t1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
-1	SIMPLE	t1	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
+1	SIMPLE	t1	system	NULL	NULL	NULL	NULL	0	0.00	Const row not found
 Warnings:
 Note	1003	select benchmark(1,1) AS `benchmark(1,1)` from `test`.`t1`
 show status like "Qcache_queries_in_cache";

mysql-test/r/select.result

@@ -2330,7 +2330,7 @@ insert into t4 values (1,1);
 explain select * from t1 left join t2 on id1 = id2 left join t3 on id1 = id3
 left join t4 on id3 = id4 where id2 = 1 or id4 = 1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t3	system	NULL	NULL	NULL	NULL	0	const row not found
+1	SIMPLE	t3	system	NULL	NULL	NULL	NULL	0	Const row not found
 1	SIMPLE	t4	const	id4	NULL	NULL	NULL	1	
 1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	2	
 1	SIMPLE	t2	ALL	NULL	NULL	NULL	NULL	1	Using where
@@ -4660,17 +4660,17 @@ DROP TABLE t1;
 CREATE TABLE t1 (a INT NOT NULL, b INT NOT NULL, c INT NOT NULL);
 EXPLAIN EXTENDED SELECT * FROM t1 WHERE (a=a AND b=b AND c=c) OR b > 20;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
-1	SIMPLE	t1	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
+1	SIMPLE	t1	system	NULL	NULL	NULL	NULL	0	0.00	Const row not found
 Warnings:
 Note	1003	select NULL AS `a`,NULL AS `b`,NULL AS `c` from `test`.`t1` where 1
 EXPLAIN EXTENDED SELECT * FROM t1 WHERE (a=a AND a=a AND b=b) OR b > 20;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
-1	SIMPLE	t1	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
+1	SIMPLE	t1	system	NULL	NULL	NULL	NULL	0	0.00	Const row not found
 Warnings:
 Note	1003	select NULL AS `a`,NULL AS `b`,NULL AS `c` from `test`.`t1` where 1
 EXPLAIN EXTENDED SELECT * FROM t1 WHERE (a=a AND b=b AND a=a) OR b > 20;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
-1	SIMPLE	t1	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
+1	SIMPLE	t1	system	NULL	NULL	NULL	NULL	0	0.00	Const row not found
 Warnings:
 Note	1003	select NULL AS `a`,NULL AS `b`,NULL AS `c` from `test`.`t1` where 1
 DROP TABLE t1;

mysql-test/r/select_found.result

@@ -83,7 +83,7 @@ UNIQUE KEY e_n (email,name)
 );
 EXPLAIN SELECT SQL_CALC_FOUND_ROWS DISTINCT email FROM t2 LEFT JOIN t1  ON kid = t2.id WHERE t1.id IS NULL LIMIT 10;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	system	PRIMARY,kid	NULL	NULL	NULL	0	const row not found; Using temporary
+1	SIMPLE	t1	system	PRIMARY,kid	NULL	NULL	NULL	0	Const row not found; Using temporary
 1	SIMPLE	t2	ALL	NULL	NULL	NULL	NULL	200	
 SELECT SQL_CALC_FOUND_ROWS DISTINCT email FROM t2 LEFT JOIN t1  ON kid = t2.id WHERE t1.id IS NULL LIMIT 10;
 email

mysql-test/r/select_jcl6.result

@@ -2341,7 +2341,7 @@ insert into t4 values (1,1);
 explain select * from t1 left join t2 on id1 = id2 left join t3 on id1 = id3
 left join t4 on id3 = id4 where id2 = 1 or id4 = 1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t3	system	NULL	NULL	NULL	NULL	0	const row not found
+1	SIMPLE	t3	system	NULL	NULL	NULL	NULL	0	Const row not found
 1	SIMPLE	t4	const	id4	NULL	NULL	NULL	1	
 1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	2	
 1	SIMPLE	t2	hash_ALL	NULL	#hash#$hj	4	test.t1.id1	1	Using where; Using join buffer (flat, BNLH join)
@@ -4671,17 +4671,17 @@ DROP TABLE t1;
 CREATE TABLE t1 (a INT NOT NULL, b INT NOT NULL, c INT NOT NULL);
 EXPLAIN EXTENDED SELECT * FROM t1 WHERE (a=a AND b=b AND c=c) OR b > 20;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
-1	SIMPLE	t1	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
+1	SIMPLE	t1	system	NULL	NULL	NULL	NULL	0	0.00	Const row not found
 Warnings:
 Note	1003	select NULL AS `a`,NULL AS `b`,NULL AS `c` from `test`.`t1` where 1
 EXPLAIN EXTENDED SELECT * FROM t1 WHERE (a=a AND a=a AND b=b) OR b > 20;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
-1	SIMPLE	t1	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
+1	SIMPLE	t1	system	NULL	NULL	NULL	NULL	0	0.00	Const row not found
 Warnings:
 Note	1003	select NULL AS `a`,NULL AS `b`,NULL AS `c` from `test`.`t1` where 1
 EXPLAIN EXTENDED SELECT * FROM t1 WHERE (a=a AND b=b AND a=a) OR b > 20;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
-1	SIMPLE	t1	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
+1	SIMPLE	t1	system	NULL	NULL	NULL	NULL	0	0.00	Const row not found
 Warnings:
 Note	1003	select NULL AS `a`,NULL AS `b`,NULL AS `c` from `test`.`t1` where 1
 DROP TABLE t1;

mysql-test/r/select_pkeycache.result

@@ -2330,7 +2330,7 @@ insert into t4 values (1,1);
 explain select * from t1 left join t2 on id1 = id2 left join t3 on id1 = id3
 left join t4 on id3 = id4 where id2 = 1 or id4 = 1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t3	system	NULL	NULL	NULL	NULL	0	const row not found
+1	SIMPLE	t3	system	NULL	NULL	NULL	NULL	0	Const row not found
 1	SIMPLE	t4	const	id4	NULL	NULL	NULL	1	
 1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	2	
 1	SIMPLE	t2	ALL	NULL	NULL	NULL	NULL	1	Using where
@@ -4660,17 +4660,17 @@ DROP TABLE t1;
 CREATE TABLE t1 (a INT NOT NULL, b INT NOT NULL, c INT NOT NULL);
 EXPLAIN EXTENDED SELECT * FROM t1 WHERE (a=a AND b=b AND c=c) OR b > 20;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
-1	SIMPLE	t1	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
+1	SIMPLE	t1	system	NULL	NULL	NULL	NULL	0	0.00	Const row not found
 Warnings:
 Note	1003	select NULL AS `a`,NULL AS `b`,NULL AS `c` from `test`.`t1` where 1
 EXPLAIN EXTENDED SELECT * FROM t1 WHERE (a=a AND a=a AND b=b) OR b > 20;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
-1	SIMPLE	t1	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
+1	SIMPLE	t1	system	NULL	NULL	NULL	NULL	0	0.00	Const row not found
 Warnings:
 Note	1003	select NULL AS `a`,NULL AS `b`,NULL AS `c` from `test`.`t1` where 1
 EXPLAIN EXTENDED SELECT * FROM t1 WHERE (a=a AND b=b AND a=a) OR b > 20;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
-1	SIMPLE	t1	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
+1	SIMPLE	t1	system	NULL	NULL	NULL	NULL	0	0.00	Const row not found
 Warnings:
 Note	1003	select NULL AS `a`,NULL AS `b`,NULL AS `c` from `test`.`t1` where 1
 DROP TABLE t1;

mysql-test/r/subselect.result

@@ -1161,20 +1161,20 @@ drop table t1;
 CREATE TABLE t1 (a int(1));
 EXPLAIN EXTENDED SELECT (SELECT RAND() FROM t1) FROM t1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
-1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
-2	UNCACHEABLE SUBQUERY	t1	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
+1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	0	0.00	Const row not found
+2	UNCACHEABLE SUBQUERY	t1	system	NULL	NULL	NULL	NULL	0	0.00	Const row not found
 Warnings:
 Note	1003	/* select#1 */ select (/* select#2 */ select rand() from `test`.`t1`) AS `(SELECT RAND() FROM t1)` from `test`.`t1`
 EXPLAIN EXTENDED SELECT (SELECT ENCRYPT('test') FROM t1) FROM t1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
-1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
-2	UNCACHEABLE SUBQUERY	t1	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
+1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	0	0.00	Const row not found
+2	UNCACHEABLE SUBQUERY	t1	system	NULL	NULL	NULL	NULL	0	0.00	Const row not found
 Warnings:
 Note	1003	/* select#1 */ select (/* select#2 */ select encrypt('test') from `test`.`t1`) AS `(SELECT ENCRYPT('test') FROM t1)` from `test`.`t1`
 EXPLAIN EXTENDED SELECT (SELECT BENCHMARK(1,1) FROM t1) FROM t1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
-1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
-2	UNCACHEABLE SUBQUERY	t1	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
+1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	0	0.00	Const row not found
+2	UNCACHEABLE SUBQUERY	t1	system	NULL	NULL	NULL	NULL	0	0.00	Const row not found
 Warnings:
 Note	1003	/* select#1 */ select (/* select#2 */ select benchmark(1,1) from `test`.`t1`) AS `(SELECT BENCHMARK(1,1) FROM t1)` from `test`.`t1`
 drop table t1;
@@ -1644,7 +1644,7 @@ a
 explain extended select * from t3 where a >= all (select b from t2);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
-2	SUBQUERY	t2	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
+2	SUBQUERY	t2	system	NULL	NULL	NULL	NULL	0	0.00	Const row not found
 Warnings:
 Note	1003	/* select#1 */ select `test`.`t3`.`a` AS `a` from `test`.`t3` where <not>(<in_optimizer>(`test`.`t3`.`a`,(/* select#2 */ select max(NULL) from `test`.`t2`) > <cache>(`test`.`t3`.`a`)))
 select * from t3 where a >= some (select b from t2);
@@ -1652,7 +1652,7 @@ a
 explain extended select * from t3 where a >= some (select b from t2);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
-2	SUBQUERY	t2	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
+2	SUBQUERY	t2	system	NULL	NULL	NULL	NULL	0	0.00	Const row not found
 Warnings:
 Note	1003	/* select#1 */ select `test`.`t3`.`a` AS `a` from `test`.`t3` where <nop>(<in_optimizer>(`test`.`t3`.`a`,(/* select#2 */ select min(NULL) from `test`.`t2`) <= <cache>(`test`.`t3`.`a`)))
 select * from t3 where a >= all (select b from t2 group by 1);
@@ -1663,7 +1663,7 @@ a
 explain extended select * from t3 where a >= all (select b from t2 group by 1);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
-2	SUBQUERY	t2	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
+2	SUBQUERY	t2	system	NULL	NULL	NULL	NULL	0	0.00	Const row not found
 Warnings:
 Note	1003	/* select#1 */ select `test`.`t3`.`a` AS `a` from `test`.`t3` where <not>(<in_optimizer>(`test`.`t3`.`a`,(/* select#2 */ select max(NULL) from `test`.`t2`) > <cache>(`test`.`t3`.`a`)))
 select * from t3 where a >= some (select b from t2 group by 1);
@@ -1671,7 +1671,7 @@ a
 explain extended select * from t3 where a >= some (select b from t2 group by 1);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
-2	SUBQUERY	t2	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
+2	SUBQUERY	t2	system	NULL	NULL	NULL	NULL	0	0.00	Const row not found
 Warnings:
 Note	1003	/* select#1 */ select `test`.`t3`.`a` AS `a` from `test`.`t3` where <nop>(<in_optimizer>(`test`.`t3`.`a`,(/* select#2 */ select min(NULL) from `test`.`t2`) <= <cache>(`test`.`t3`.`a`)))
 select * from t3 where NULL >= any (select b from t2);
@@ -3734,7 +3734,7 @@ from t1' at line 1
 explain select * from t1 where not exists
 ((select t11.i from t1 t11) union (select t12.i from t1 t12));
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	0	const row not found
+1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	0	Const row not found
 2	SUBQUERY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	no matching row in const table
 3	UNION	NULL	NULL	NULL	NULL	NULL	NULL	NULL	no matching row in const table
 NULL	UNION RESULT	<union2,3>	ALL	NULL	NULL	NULL	NULL	NULL	
@@ -6120,7 +6120,7 @@ FROM t1 AS sq4_alias1
 WHERE (sq4_alias1.col_varchar_key + NULL) IS NULL OR
 sq4_alias1.col_varchar_key = @var3;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	sq4_alias1	system	NULL	NULL	NULL	NULL	0	const row not found
+1	SIMPLE	sq4_alias1	system	NULL	NULL	NULL	NULL	0	Const row not found
 SELECT @var3:=12, sq4_alias1.*
 FROM t1 AS sq4_alias1
 WHERE (sq4_alias1.col_varchar_key + NULL) IS NULL OR
@@ -6134,7 +6134,7 @@ FROM t1 AS sq4_alias1
 WHERE (sq4_alias1.col_varchar_key + NULL) IS NULL OR
 sq4_alias1.col_varchar_key = @var3 ) AS alias3;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	PRIMARY	<derived2>	system	NULL	NULL	NULL	NULL	0	const row not found
+1	PRIMARY	<derived2>	system	NULL	NULL	NULL	NULL	0	Const row not found
 2	DERIVED	NULL	NULL	NULL	NULL	NULL	NULL	NULL	no matching row in const table
 SELECT * FROM ( SELECT @var3:=12, sq4_alias1.*
 FROM t1 AS sq4_alias1
@@ -6720,7 +6720,7 @@ CREATE TABLE t2 (b INT);
 EXPLAIN
 SELECT SUM(a) AS f1, a AS f2 FROM (t1, t2) HAVING f2 >= ALL (SELECT 4 UNION SELECT 5) AND f1 = 7;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	PRIMARY	t2	system	NULL	NULL	NULL	NULL	0	const row not found
+1	PRIMARY	t2	system	NULL	NULL	NULL	NULL	0	Const row not found
 1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	2	
 2	SUBQUERY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used
 3	UNION	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used

mysql-test/r/subselect4.result

@@ -21,7 +21,7 @@ ORDER BY count(*);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	PRIMARY	t1	index	NULL	a	5	NULL	2	Using index
 2	DEPENDENT SUBQUERY	t2	ALL	NULL	NULL	NULL	NULL	2	Using where
-3	DEPENDENT SUBQUERY	t3	system	NULL	NULL	NULL	NULL	0	const row not found
+3	DEPENDENT SUBQUERY	t3	system	NULL	NULL	NULL	NULL	0	Const row not found
 # should not crash the next statement
 SELECT 1 FROM t1
 WHERE NOT EXISTS (SELECT 1 FROM t2 WHERE 1 = (SELECT MIN(t2.b) FROM t3))
@@ -1261,7 +1261,7 @@ SET optimizer_switch='materialization=off';
 EXPLAIN
 SELECT * FROM t1 RIGHT JOIN t2 ON t1.c1 WHERE 's' IN (SELECT c1 FROM t2);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	0	const row not found
+1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	0	Const row not found
 1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	2	Using where; FirstMatch(t1)
 1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	2	Using join buffer (flat, BNL join)
 SELECT * FROM t1 RIGHT JOIN t2 ON t1.c1 WHERE 's' IN (SELECT c1 FROM t2);
@@ -1269,7 +1269,7 @@ c1	c1
 EXPLAIN
 SELECT * FROM t2 LEFT JOIN t1 ON t1.c1 WHERE 's' IN (SELECT c1 FROM t2);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	0	const row not found
+1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	0	Const row not found
 1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	2	Using where; FirstMatch(t1)
 1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	2	Using join buffer (flat, BNL join)
 SELECT * FROM t2 LEFT JOIN t1 ON t1.c1 WHERE 's' IN (SELECT c1 FROM t2);
@@ -1278,7 +1278,7 @@ SET optimizer_switch='materialization=on';
 EXPLAIN
 SELECT * FROM (t2 LEFT JOIN t1 ON t1.c1) LEFT JOIN t3 on t3.c1 WHERE 's' IN (SELECT c1 FROM t2);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	0	const row not found
+1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	0	Const row not found
 1	PRIMARY	<subquery2>	eq_ref	distinct_key	distinct_key	4	func	1	
 1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	2	Using join buffer (flat, BNL join)
 1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	3	Using where
@@ -2191,7 +2191,7 @@ INSERT INTO t2 VALUES (1);
 EXPLAIN
 SELECT MAX(a), ( SELECT 1 FROM t2 ) AS bb FROM t1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	0	const row not found
+1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	0	Const row not found
 2	SUBQUERY	t2	system	NULL	NULL	NULL	NULL	1	
 SELECT MAX(a), ( SELECT 1 FROM t2 ) AS bb FROM t1;
 MAX(a)	bb
@@ -2199,7 +2199,7 @@ NULL	1
 EXPLAIN
 SELECT MAX(a), 1 in ( SELECT b FROM t2 ) AS bb FROM t1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	0	const row not found
+1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	0	Const row not found
 2	SUBQUERY	t2	system	NULL	NULL	NULL	NULL	1	
 SELECT MAX(a), 1 in ( SELECT b FROM t2 ) AS bb FROM t1;
 MAX(a)	bb
@@ -2207,7 +2207,7 @@ NULL	1
 EXPLAIN
 SELECT MAX(a), 1 >= ALL ( SELECT b FROM t2 ) AS bb FROM t1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	0	const row not found
+1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	0	Const row not found
 2	SUBQUERY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Impossible WHERE noticed after reading const tables
 SELECT MAX(a), 1 >= ALL ( SELECT b FROM t2 ) AS bb FROM t1;
 MAX(a)	bb
@@ -2215,7 +2215,7 @@ NULL	1
 EXPLAIN
 SELECT MAX(a), ( SELECT 1 FROM t2 where b = a) AS bb FROM t1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	0	const row not found
+1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	0	Const row not found
 2	SUBQUERY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Impossible WHERE noticed after reading const tables
 SELECT MAX(a), ( SELECT 1 FROM t2 where b = a) AS bb FROM t1;
 MAX(a)	bb
@@ -2223,7 +2223,7 @@ NULL	NULL
 EXPLAIN
 SELECT MAX(a), a in ( SELECT b FROM t2 ) AS bb FROM t1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	0	const row not found
+1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	0	Const row not found
 2	DEPENDENT SUBQUERY	t2	system	NULL	NULL	NULL	NULL	1	
 SELECT MAX(a), a in ( SELECT b FROM t2 ) AS bb FROM t1;
 MAX(a)	bb
@@ -2231,7 +2231,7 @@ NULL	NULL
 EXPLAIN
 SELECT MAX(a), a >= ALL ( SELECT b FROM t2 ) AS bb FROM t1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	0	const row not found
+1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	0	Const row not found
 2	DEPENDENT SUBQUERY	t2	system	NULL	NULL	NULL	NULL	1	
 SELECT MAX(a), a >= ALL ( SELECT b FROM t2 ) AS bb FROM t1;
 MAX(a)	bb

mysql-test/r/subselect_mat.result

@@ -2544,7 +2544,7 @@ SELECT i FROM t1 LEFT JOIN t2 ON (j) IN (SELECT k FROM t3);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	1	
 1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	1	Using where
-2	MATERIALIZED	t3	system	NULL	NULL	NULL	NULL	0	const row not found
+2	MATERIALIZED	t3	system	NULL	NULL	NULL	NULL	0	Const row not found
 SELECT i FROM t1 LEFT JOIN t2 ON (j) IN (SELECT k FROM t3);
 i
 10
@@ -2553,7 +2553,7 @@ SELECT i FROM t1 LEFT JOIN t2 ON (j) IN (SELECT max(k) FROM t3);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	1	
 1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	1	Using where
-2	MATERIALIZED	t3	system	NULL	NULL	NULL	NULL	0	const row not found
+2	MATERIALIZED	t3	system	NULL	NULL	NULL	NULL	0	Const row not found
 SELECT i FROM t1 LEFT JOIN t2 ON (j) IN (SELECT max(k) FROM t3);
 i
 10

mysql-test/r/subselect_mat_cost_bugs.result

@@ -162,7 +162,7 @@ EXPLAIN
 SELECT * FROM (SELECT * FROM t2) AS a2
 WHERE (SELECT distinct SUM(distinct f3 ) FROM t1);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	PRIMARY	<derived2>	system	NULL	NULL	NULL	NULL	0	const row not found
+1	PRIMARY	<derived2>	system	NULL	NULL	NULL	NULL	0	Const row not found
 3	SUBQUERY	t1	index	NULL	f3	5	NULL	2	Using index
 2	DERIVED	NULL	NULL	NULL	NULL	NULL	NULL	NULL	no matching row in const table
 insert into t2 values (1),(2);

mysql-test/r/subselect_no_exists_to_in.result

@@ -1165,20 +1165,20 @@ drop table t1;
 CREATE TABLE t1 (a int(1));
 EXPLAIN EXTENDED SELECT (SELECT RAND() FROM t1) FROM t1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
-1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
-2	UNCACHEABLE SUBQUERY	t1	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
+1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	0	0.00	Const row not found
+2	UNCACHEABLE SUBQUERY	t1	system	NULL	NULL	NULL	NULL	0	0.00	Const row not found
 Warnings:
 Note	1003	/* select#1 */ select (/* select#2 */ select rand() from `test`.`t1`) AS `(SELECT RAND() FROM t1)` from `test`.`t1`
 EXPLAIN EXTENDED SELECT (SELECT ENCRYPT('test') FROM t1) FROM t1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
-1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
-2	UNCACHEABLE SUBQUERY	t1	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
+1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	0	0.00	Const row not found
+2	UNCACHEABLE SUBQUERY	t1	system	NULL	NULL	NULL	NULL	0	0.00	Const row not found
 Warnings:
 Note	1003	/* select#1 */ select (/* select#2 */ select encrypt('test') from `test`.`t1`) AS `(SELECT ENCRYPT('test') FROM t1)` from `test`.`t1`
 EXPLAIN EXTENDED SELECT (SELECT BENCHMARK(1,1) FROM t1) FROM t1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
-1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
-2	UNCACHEABLE SUBQUERY	t1	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
+1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	0	0.00	Const row not found
+2	UNCACHEABLE SUBQUERY	t1	system	NULL	NULL	NULL	NULL	0	0.00	Const row not found
 Warnings:
 Note	1003	/* select#1 */ select (/* select#2 */ select benchmark(1,1) from `test`.`t1`) AS `(SELECT BENCHMARK(1,1) FROM t1)` from `test`.`t1`
 drop table t1;
@@ -1648,7 +1648,7 @@ a
 explain extended select * from t3 where a >= all (select b from t2);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
-2	SUBQUERY	t2	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
+2	SUBQUERY	t2	system	NULL	NULL	NULL	NULL	0	0.00	Const row not found
 Warnings:
 Note	1003	/* select#1 */ select `test`.`t3`.`a` AS `a` from `test`.`t3` where <not>(<in_optimizer>(`test`.`t3`.`a`,(/* select#2 */ select max(NULL) from `test`.`t2`) > <cache>(`test`.`t3`.`a`)))
 select * from t3 where a >= some (select b from t2);
@@ -1656,7 +1656,7 @@ a
 explain extended select * from t3 where a >= some (select b from t2);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
-2	SUBQUERY	t2	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
+2	SUBQUERY	t2	system	NULL	NULL	NULL	NULL	0	0.00	Const row not found
 Warnings:
 Note	1003	/* select#1 */ select `test`.`t3`.`a` AS `a` from `test`.`t3` where <nop>(<in_optimizer>(`test`.`t3`.`a`,(/* select#2 */ select min(NULL) from `test`.`t2`) <= <cache>(`test`.`t3`.`a`)))
 select * from t3 where a >= all (select b from t2 group by 1);
@@ -1667,7 +1667,7 @@ a
 explain extended select * from t3 where a >= all (select b from t2 group by 1);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
-2	SUBQUERY	t2	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
+2	SUBQUERY	t2	system	NULL	NULL	NULL	NULL	0	0.00	Const row not found
 Warnings:
 Note	1003	/* select#1 */ select `test`.`t3`.`a` AS `a` from `test`.`t3` where <not>(<in_optimizer>(`test`.`t3`.`a`,(/* select#2 */ select max(NULL) from `test`.`t2`) > <cache>(`test`.`t3`.`a`)))
 select * from t3 where a >= some (select b from t2 group by 1);
@@ -1675,7 +1675,7 @@ a
 explain extended select * from t3 where a >= some (select b from t2 group by 1);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
-2	SUBQUERY	t2	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
+2	SUBQUERY	t2	system	NULL	NULL	NULL	NULL	0	0.00	Const row not found
 Warnings:
 Note	1003	/* select#1 */ select `test`.`t3`.`a` AS `a` from `test`.`t3` where <nop>(<in_optimizer>(`test`.`t3`.`a`,(/* select#2 */ select min(NULL) from `test`.`t2`) <= <cache>(`test`.`t3`.`a`)))
 select * from t3 where NULL >= any (select b from t2);
@@ -3737,7 +3737,7 @@ from t1' at line 1
 explain select * from t1 where not exists
 ((select t11.i from t1 t11) union (select t12.i from t1 t12));
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	0	const row not found
+1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	0	Const row not found
 2	SUBQUERY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	no matching row in const table
 3	UNION	NULL	NULL	NULL	NULL	NULL	NULL	NULL	no matching row in const table
 NULL	UNION RESULT	<union2,3>	ALL	NULL	NULL	NULL	NULL	NULL	
@@ -6120,7 +6120,7 @@ FROM t1 AS sq4_alias1
 WHERE (sq4_alias1.col_varchar_key + NULL) IS NULL OR
 sq4_alias1.col_varchar_key = @var3;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	sq4_alias1	system	NULL	NULL	NULL	NULL	0	const row not found
+1	SIMPLE	sq4_alias1	system	NULL	NULL	NULL	NULL	0	Const row not found
 SELECT @var3:=12, sq4_alias1.*
 FROM t1 AS sq4_alias1
 WHERE (sq4_alias1.col_varchar_key + NULL) IS NULL OR
@@ -6134,7 +6134,7 @@ FROM t1 AS sq4_alias1
 WHERE (sq4_alias1.col_varchar_key + NULL) IS NULL OR
 sq4_alias1.col_varchar_key = @var3 ) AS alias3;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	PRIMARY	<derived2>	system	NULL	NULL	NULL	NULL	0	const row not found
+1	PRIMARY	<derived2>	system	NULL	NULL	NULL	NULL	0	Const row not found
 2	DERIVED	NULL	NULL	NULL	NULL	NULL	NULL	NULL	no matching row in const table
 SELECT * FROM ( SELECT @var3:=12, sq4_alias1.*
 FROM t1 AS sq4_alias1
@@ -6720,7 +6720,7 @@ CREATE TABLE t2 (b INT);
 EXPLAIN
 SELECT SUM(a) AS f1, a AS f2 FROM (t1, t2) HAVING f2 >= ALL (SELECT 4 UNION SELECT 5) AND f1 = 7;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	PRIMARY	t2	system	NULL	NULL	NULL	NULL	0	const row not found
+1	PRIMARY	t2	system	NULL	NULL	NULL	NULL	0	Const row not found
 1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	2	
 2	SUBQUERY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used
 3	UNION	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used

mysql-test/r/subselect_no_mat.result

@@ -1168,20 +1168,20 @@ drop table t1;
 CREATE TABLE t1 (a int(1));
 EXPLAIN EXTENDED SELECT (SELECT RAND() FROM t1) FROM t1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
-1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
-2	UNCACHEABLE SUBQUERY	t1	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
+1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	0	0.00	Const row not found
+2	UNCACHEABLE SUBQUERY	t1	system	NULL	NULL	NULL	NULL	0	0.00	Const row not found
 Warnings:
 Note	1003	/* select#1 */ select (/* select#2 */ select rand() from `test`.`t1`) AS `(SELECT RAND() FROM t1)` from `test`.`t1`
 EXPLAIN EXTENDED SELECT (SELECT ENCRYPT('test') FROM t1) FROM t1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
-1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
-2	UNCACHEABLE SUBQUERY	t1	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
+1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	0	0.00	Const row not found
+2	UNCACHEABLE SUBQUERY	t1	system	NULL	NULL	NULL	NULL	0	0.00	Const row not found
 Warnings:
 Note	1003	/* select#1 */ select (/* select#2 */ select encrypt('test') from `test`.`t1`) AS `(SELECT ENCRYPT('test') FROM t1)` from `test`.`t1`
 EXPLAIN EXTENDED SELECT (SELECT BENCHMARK(1,1) FROM t1) FROM t1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
-1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
-2	UNCACHEABLE SUBQUERY	t1	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
+1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	0	0.00	Const row not found
+2	UNCACHEABLE SUBQUERY	t1	system	NULL	NULL	NULL	NULL	0	0.00	Const row not found
 Warnings:
 Note	1003	/* select#1 */ select (/* select#2 */ select benchmark(1,1) from `test`.`t1`) AS `(SELECT BENCHMARK(1,1) FROM t1)` from `test`.`t1`
 drop table t1;
@@ -1651,7 +1651,7 @@ a
 explain extended select * from t3 where a >= all (select b from t2);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
-2	SUBQUERY	t2	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
+2	SUBQUERY	t2	system	NULL	NULL	NULL	NULL	0	0.00	Const row not found
 Warnings:
 Note	1003	/* select#1 */ select `test`.`t3`.`a` AS `a` from `test`.`t3` where <not>(<in_optimizer>(`test`.`t3`.`a`,(/* select#2 */ select max(NULL) from `test`.`t2`) > <cache>(`test`.`t3`.`a`)))
 select * from t3 where a >= some (select b from t2);
@@ -1659,7 +1659,7 @@ a
 explain extended select * from t3 where a >= some (select b from t2);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
-2	SUBQUERY	t2	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
+2	SUBQUERY	t2	system	NULL	NULL	NULL	NULL	0	0.00	Const row not found
 Warnings:
 Note	1003	/* select#1 */ select `test`.`t3`.`a` AS `a` from `test`.`t3` where <nop>(<in_optimizer>(`test`.`t3`.`a`,(/* select#2 */ select min(NULL) from `test`.`t2`) <= <cache>(`test`.`t3`.`a`)))
 select * from t3 where a >= all (select b from t2 group by 1);
@@ -1670,7 +1670,7 @@ a
 explain extended select * from t3 where a >= all (select b from t2 group by 1);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
-2	SUBQUERY	t2	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
+2	SUBQUERY	t2	system	NULL	NULL	NULL	NULL	0	0.00	Const row not found
 Warnings:
 Note	1003	/* select#1 */ select `test`.`t3`.`a` AS `a` from `test`.`t3` where <not>(<in_optimizer>(`test`.`t3`.`a`,(/* select#2 */ select max(NULL) from `test`.`t2`) > <cache>(`test`.`t3`.`a`)))
 select * from t3 where a >= some (select b from t2 group by 1);
@@ -1678,7 +1678,7 @@ a
 explain extended select * from t3 where a >= some (select b from t2 group by 1);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
-2	SUBQUERY	t2	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
+2	SUBQUERY	t2	system	NULL	NULL	NULL	NULL	0	0.00	Const row not found
 Warnings:
 Note	1003	/* select#1 */ select `test`.`t3`.`a` AS `a` from `test`.`t3` where <nop>(<in_optimizer>(`test`.`t3`.`a`,(/* select#2 */ select min(NULL) from `test`.`t2`) <= <cache>(`test`.`t3`.`a`)))
 select * from t3 where NULL >= any (select b from t2);
@@ -3737,7 +3737,7 @@ from t1' at line 1
 explain select * from t1 where not exists
 ((select t11.i from t1 t11) union (select t12.i from t1 t12));
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	0	const row not found
+1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	0	Const row not found
 2	SUBQUERY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	no matching row in const table
 3	UNION	NULL	NULL	NULL	NULL	NULL	NULL	NULL	no matching row in const table
 NULL	UNION RESULT	<union2,3>	ALL	NULL	NULL	NULL	NULL	NULL	
@@ -6115,7 +6115,7 @@ FROM t1 AS sq4_alias1
 WHERE (sq4_alias1.col_varchar_key + NULL) IS NULL OR
 sq4_alias1.col_varchar_key = @var3;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	sq4_alias1	system	NULL	NULL	NULL	NULL	0	const row not found
+1	SIMPLE	sq4_alias1	system	NULL	NULL	NULL	NULL	0	Const row not found
 SELECT @var3:=12, sq4_alias1.*
 FROM t1 AS sq4_alias1
 WHERE (sq4_alias1.col_varchar_key + NULL) IS NULL OR
@@ -6129,7 +6129,7 @@ FROM t1 AS sq4_alias1
 WHERE (sq4_alias1.col_varchar_key + NULL) IS NULL OR
 sq4_alias1.col_varchar_key = @var3 ) AS alias3;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	PRIMARY	<derived2>	system	NULL	NULL	NULL	NULL	0	const row not found
+1	PRIMARY	<derived2>	system	NULL	NULL	NULL	NULL	0	Const row not found
 2	DERIVED	NULL	NULL	NULL	NULL	NULL	NULL	NULL	no matching row in const table
 SELECT * FROM ( SELECT @var3:=12, sq4_alias1.*
 FROM t1 AS sq4_alias1
@@ -6715,7 +6715,7 @@ CREATE TABLE t2 (b INT);
 EXPLAIN
 SELECT SUM(a) AS f1, a AS f2 FROM (t1, t2) HAVING f2 >= ALL (SELECT 4 UNION SELECT 5) AND f1 = 7;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	PRIMARY	t2	system	NULL	NULL	NULL	NULL	0	const row not found
+1	PRIMARY	t2	system	NULL	NULL	NULL	NULL	0	Const row not found
 1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	2	
 2	SUBQUERY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used
 3	UNION	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used

mysql-test/r/subselect_no_opts.result

@@ -1164,20 +1164,20 @@ drop table t1;
 CREATE TABLE t1 (a int(1));
 EXPLAIN EXTENDED SELECT (SELECT RAND() FROM t1) FROM t1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
-1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
-2	UNCACHEABLE SUBQUERY	t1	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
+1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	0	0.00	Const row not found
+2	UNCACHEABLE SUBQUERY	t1	system	NULL	NULL	NULL	NULL	0	0.00	Const row not found
 Warnings:
 Note	1003	/* select#1 */ select (/* select#2 */ select rand() from `test`.`t1`) AS `(SELECT RAND() FROM t1)` from `test`.`t1`
 EXPLAIN EXTENDED SELECT (SELECT ENCRYPT('test') FROM t1) FROM t1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
-1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
-2	UNCACHEABLE SUBQUERY	t1	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
+1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	0	0.00	Const row not found
+2	UNCACHEABLE SUBQUERY	t1	system	NULL	NULL	NULL	NULL	0	0.00	Const row not found
 Warnings:
 Note	1003	/* select#1 */ select (/* select#2 */ select encrypt('test') from `test`.`t1`) AS `(SELECT ENCRYPT('test') FROM t1)` from `test`.`t1`
 EXPLAIN EXTENDED SELECT (SELECT BENCHMARK(1,1) FROM t1) FROM t1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
-1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
-2	UNCACHEABLE SUBQUERY	t1	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
+1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	0	0.00	Const row not found
+2	UNCACHEABLE SUBQUERY	t1	system	NULL	NULL	NULL	NULL	0	0.00	Const row not found
 Warnings:
 Note	1003	/* select#1 */ select (/* select#2 */ select benchmark(1,1) from `test`.`t1`) AS `(SELECT BENCHMARK(1,1) FROM t1)` from `test`.`t1`
 drop table t1;
@@ -1647,7 +1647,7 @@ a
 explain extended select * from t3 where a >= all (select b from t2);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
-2	SUBQUERY	t2	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
+2	SUBQUERY	t2	system	NULL	NULL	NULL	NULL	0	0.00	Const row not found
 Warnings:
 Note	1003	/* select#1 */ select `test`.`t3`.`a` AS `a` from `test`.`t3` where <not>(<in_optimizer>(`test`.`t3`.`a`,(/* select#2 */ select max(NULL) from `test`.`t2`) > <cache>(`test`.`t3`.`a`)))
 select * from t3 where a >= some (select b from t2);
@@ -1655,7 +1655,7 @@ a
 explain extended select * from t3 where a >= some (select b from t2);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
-2	SUBQUERY	t2	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
+2	SUBQUERY	t2	system	NULL	NULL	NULL	NULL	0	0.00	Const row not found
 Warnings:
 Note	1003	/* select#1 */ select `test`.`t3`.`a` AS `a` from `test`.`t3` where <nop>(<in_optimizer>(`test`.`t3`.`a`,(/* select#2 */ select min(NULL) from `test`.`t2`) <= <cache>(`test`.`t3`.`a`)))
 select * from t3 where a >= all (select b from t2 group by 1);
@@ -1666,7 +1666,7 @@ a
 explain extended select * from t3 where a >= all (select b from t2 group by 1);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
-2	SUBQUERY	t2	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
+2	SUBQUERY	t2	system	NULL	NULL	NULL	NULL	0	0.00	Const row not found
 Warnings:
 Note	1003	/* select#1 */ select `test`.`t3`.`a` AS `a` from `test`.`t3` where <not>(<in_optimizer>(`test`.`t3`.`a`,(/* select#2 */ select max(NULL) from `test`.`t2`) > <cache>(`test`.`t3`.`a`)))
 select * from t3 where a >= some (select b from t2 group by 1);
@@ -1674,7 +1674,7 @@ a
 explain extended select * from t3 where a >= some (select b from t2 group by 1);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
-2	SUBQUERY	t2	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
+2	SUBQUERY	t2	system	NULL	NULL	NULL	NULL	0	0.00	Const row not found
 Warnings:
 Note	1003	/* select#1 */ select `test`.`t3`.`a` AS `a` from `test`.`t3` where <nop>(<in_optimizer>(`test`.`t3`.`a`,(/* select#2 */ select min(NULL) from `test`.`t2`) <= <cache>(`test`.`t3`.`a`)))
 select * from t3 where NULL >= any (select b from t2);
@@ -3733,7 +3733,7 @@ from t1' at line 1
 explain select * from t1 where not exists
 ((select t11.i from t1 t11) union (select t12.i from t1 t12));
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	0	const row not found
+1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	0	Const row not found
 2	SUBQUERY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	no matching row in const table
 3	UNION	NULL	NULL	NULL	NULL	NULL	NULL	NULL	no matching row in const table
 NULL	UNION RESULT	<union2,3>	ALL	NULL	NULL	NULL	NULL	NULL	
@@ -6111,7 +6111,7 @@ FROM t1 AS sq4_alias1
 WHERE (sq4_alias1.col_varchar_key + NULL) IS NULL OR
 sq4_alias1.col_varchar_key = @var3;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	sq4_alias1	system	NULL	NULL	NULL	NULL	0	const row not found
+1	SIMPLE	sq4_alias1	system	NULL	NULL	NULL	NULL	0	Const row not found
 SELECT @var3:=12, sq4_alias1.*
 FROM t1 AS sq4_alias1
 WHERE (sq4_alias1.col_varchar_key + NULL) IS NULL OR
@@ -6125,7 +6125,7 @@ FROM t1 AS sq4_alias1
 WHERE (sq4_alias1.col_varchar_key + NULL) IS NULL OR
 sq4_alias1.col_varchar_key = @var3 ) AS alias3;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	PRIMARY	<derived2>	system	NULL	NULL	NULL	NULL	0	const row not found
+1	PRIMARY	<derived2>	system	NULL	NULL	NULL	NULL	0	Const row not found
 2	DERIVED	NULL	NULL	NULL	NULL	NULL	NULL	NULL	no matching row in const table
 SELECT * FROM ( SELECT @var3:=12, sq4_alias1.*
 FROM t1 AS sq4_alias1
@@ -6711,7 +6711,7 @@ CREATE TABLE t2 (b INT);
 EXPLAIN
 SELECT SUM(a) AS f1, a AS f2 FROM (t1, t2) HAVING f2 >= ALL (SELECT 4 UNION SELECT 5) AND f1 = 7;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	PRIMARY	t2	system	NULL	NULL	NULL	NULL	0	const row not found
+1	PRIMARY	t2	system	NULL	NULL	NULL	NULL	0	Const row not found
 1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	2	
 2	SUBQUERY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used
 3	UNION	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used

mysql-test/r/subselect_no_scache.result

@@ -1167,20 +1167,20 @@ drop table t1;
 CREATE TABLE t1 (a int(1));
 EXPLAIN EXTENDED SELECT (SELECT RAND() FROM t1) FROM t1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
-1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
-2	UNCACHEABLE SUBQUERY	t1	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
+1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	0	0.00	Const row not found
+2	UNCACHEABLE SUBQUERY	t1	system	NULL	NULL	NULL	NULL	0	0.00	Const row not found
 Warnings:
 Note	1003	/* select#1 */ select (/* select#2 */ select rand() from `test`.`t1`) AS `(SELECT RAND() FROM t1)` from `test`.`t1`
 EXPLAIN EXTENDED SELECT (SELECT ENCRYPT('test') FROM t1) FROM t1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
-1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
-2	UNCACHEABLE SUBQUERY	t1	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
+1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	0	0.00	Const row not found
+2	UNCACHEABLE SUBQUERY	t1	system	NULL	NULL	NULL	NULL	0	0.00	Const row not found
 Warnings:
 Note	1003	/* select#1 */ select (/* select#2 */ select encrypt('test') from `test`.`t1`) AS `(SELECT ENCRYPT('test') FROM t1)` from `test`.`t1`
 EXPLAIN EXTENDED SELECT (SELECT BENCHMARK(1,1) FROM t1) FROM t1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
-1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
-2	UNCACHEABLE SUBQUERY	t1	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
+1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	0	0.00	Const row not found
+2	UNCACHEABLE SUBQUERY	t1	system	NULL	NULL	NULL	NULL	0	0.00	Const row not found
 Warnings:
 Note	1003	/* select#1 */ select (/* select#2 */ select benchmark(1,1) from `test`.`t1`) AS `(SELECT BENCHMARK(1,1) FROM t1)` from `test`.`t1`
 drop table t1;
@@ -1650,7 +1650,7 @@ a
 explain extended select * from t3 where a >= all (select b from t2);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
-2	SUBQUERY	t2	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
+2	SUBQUERY	t2	system	NULL	NULL	NULL	NULL	0	0.00	Const row not found
 Warnings:
 Note	1003	/* select#1 */ select `test`.`t3`.`a` AS `a` from `test`.`t3` where <not>(<in_optimizer>(`test`.`t3`.`a`,(/* select#2 */ select max(NULL) from `test`.`t2`) > <cache>(`test`.`t3`.`a`)))
 select * from t3 where a >= some (select b from t2);
@@ -1658,7 +1658,7 @@ a
 explain extended select * from t3 where a >= some (select b from t2);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
-2	SUBQUERY	t2	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
+2	SUBQUERY	t2	system	NULL	NULL	NULL	NULL	0	0.00	Const row not found
 Warnings:
 Note	1003	/* select#1 */ select `test`.`t3`.`a` AS `a` from `test`.`t3` where <nop>(<in_optimizer>(`test`.`t3`.`a`,(/* select#2 */ select min(NULL) from `test`.`t2`) <= <cache>(`test`.`t3`.`a`)))
 select * from t3 where a >= all (select b from t2 group by 1);
@@ -1669,7 +1669,7 @@ a
 explain extended select * from t3 where a >= all (select b from t2 group by 1);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
-2	SUBQUERY	t2	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
+2	SUBQUERY	t2	system	NULL	NULL	NULL	NULL	0	0.00	Const row not found
 Warnings:
 Note	1003	/* select#1 */ select `test`.`t3`.`a` AS `a` from `test`.`t3` where <not>(<in_optimizer>(`test`.`t3`.`a`,(/* select#2 */ select max(NULL) from `test`.`t2`) > <cache>(`test`.`t3`.`a`)))
 select * from t3 where a >= some (select b from t2 group by 1);
@@ -1677,7 +1677,7 @@ a
 explain extended select * from t3 where a >= some (select b from t2 group by 1);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
-2	SUBQUERY	t2	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
+2	SUBQUERY	t2	system	NULL	NULL	NULL	NULL	0	0.00	Const row not found
 Warnings:
 Note	1003	/* select#1 */ select `test`.`t3`.`a` AS `a` from `test`.`t3` where <nop>(<in_optimizer>(`test`.`t3`.`a`,(/* select#2 */ select min(NULL) from `test`.`t2`) <= <cache>(`test`.`t3`.`a`)))
 select * from t3 where NULL >= any (select b from t2);
@@ -3740,7 +3740,7 @@ from t1' at line 1
 explain select * from t1 where not exists
 ((select t11.i from t1 t11) union (select t12.i from t1 t12));
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	0	const row not found
+1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	0	Const row not found
 2	SUBQUERY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	no matching row in const table
 3	UNION	NULL	NULL	NULL	NULL	NULL	NULL	NULL	no matching row in const table
 NULL	UNION RESULT	<union2,3>	ALL	NULL	NULL	NULL	NULL	NULL	
@@ -6126,7 +6126,7 @@ FROM t1 AS sq4_alias1
 WHERE (sq4_alias1.col_varchar_key + NULL) IS NULL OR
 sq4_alias1.col_varchar_key = @var3;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	sq4_alias1	system	NULL	NULL	NULL	NULL	0	const row not found
+1	SIMPLE	sq4_alias1	system	NULL	NULL	NULL	NULL	0	Const row not found
 SELECT @var3:=12, sq4_alias1.*
 FROM t1 AS sq4_alias1
 WHERE (sq4_alias1.col_varchar_key + NULL) IS NULL OR
@@ -6140,7 +6140,7 @@ FROM t1 AS sq4_alias1
 WHERE (sq4_alias1.col_varchar_key + NULL) IS NULL OR
 sq4_alias1.col_varchar_key = @var3 ) AS alias3;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	PRIMARY	<derived2>	system	NULL	NULL	NULL	NULL	0	const row not found
+1	PRIMARY	<derived2>	system	NULL	NULL	NULL	NULL	0	Const row not found
 2	DERIVED	NULL	NULL	NULL	NULL	NULL	NULL	NULL	no matching row in const table
 SELECT * FROM ( SELECT @var3:=12, sq4_alias1.*
 FROM t1 AS sq4_alias1
@@ -6726,7 +6726,7 @@ CREATE TABLE t2 (b INT);
 EXPLAIN
 SELECT SUM(a) AS f1, a AS f2 FROM (t1, t2) HAVING f2 >= ALL (SELECT 4 UNION SELECT 5) AND f1 = 7;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	PRIMARY	t2	system	NULL	NULL	NULL	NULL	0	const row not found
+1	PRIMARY	t2	system	NULL	NULL	NULL	NULL	0	Const row not found
 1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	2	
 2	SUBQUERY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used
 3	UNION	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used

mysql-test/r/subselect_no_semijoin.result

@@ -1164,20 +1164,20 @@ drop table t1;
 CREATE TABLE t1 (a int(1));
 EXPLAIN EXTENDED SELECT (SELECT RAND() FROM t1) FROM t1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
-1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
-2	UNCACHEABLE SUBQUERY	t1	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
+1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	0	0.00	Const row not found
+2	UNCACHEABLE SUBQUERY	t1	system	NULL	NULL	NULL	NULL	0	0.00	Const row not found
 Warnings:
 Note	1003	/* select#1 */ select (/* select#2 */ select rand() from `test`.`t1`) AS `(SELECT RAND() FROM t1)` from `test`.`t1`
 EXPLAIN EXTENDED SELECT (SELECT ENCRYPT('test') FROM t1) FROM t1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
-1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
-2	UNCACHEABLE SUBQUERY	t1	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
+1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	0	0.00	Const row not found
+2	UNCACHEABLE SUBQUERY	t1	system	NULL	NULL	NULL	NULL	0	0.00	Const row not found
 Warnings:
 Note	1003	/* select#1 */ select (/* select#2 */ select encrypt('test') from `test`.`t1`) AS `(SELECT ENCRYPT('test') FROM t1)` from `test`.`t1`
 EXPLAIN EXTENDED SELECT (SELECT BENCHMARK(1,1) FROM t1) FROM t1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
-1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
-2	UNCACHEABLE SUBQUERY	t1	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
+1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	0	0.00	Const row not found
+2	UNCACHEABLE SUBQUERY	t1	system	NULL	NULL	NULL	NULL	0	0.00	Const row not found
 Warnings:
 Note	1003	/* select#1 */ select (/* select#2 */ select benchmark(1,1) from `test`.`t1`) AS `(SELECT BENCHMARK(1,1) FROM t1)` from `test`.`t1`
 drop table t1;
@@ -1647,7 +1647,7 @@ a
 explain extended select * from t3 where a >= all (select b from t2);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
-2	SUBQUERY	t2	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
+2	SUBQUERY	t2	system	NULL	NULL	NULL	NULL	0	0.00	Const row not found
 Warnings:
 Note	1003	/* select#1 */ select `test`.`t3`.`a` AS `a` from `test`.`t3` where <not>(<in_optimizer>(`test`.`t3`.`a`,(/* select#2 */ select max(NULL) from `test`.`t2`) > <cache>(`test`.`t3`.`a`)))
 select * from t3 where a >= some (select b from t2);
@@ -1655,7 +1655,7 @@ a
 explain extended select * from t3 where a >= some (select b from t2);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
-2	SUBQUERY	t2	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
+2	SUBQUERY	t2	system	NULL	NULL	NULL	NULL	0	0.00	Const row not found
 Warnings:
 Note	1003	/* select#1 */ select `test`.`t3`.`a` AS `a` from `test`.`t3` where <nop>(<in_optimizer>(`test`.`t3`.`a`,(/* select#2 */ select min(NULL) from `test`.`t2`) <= <cache>(`test`.`t3`.`a`)))
 select * from t3 where a >= all (select b from t2 group by 1);
@@ -1666,7 +1666,7 @@ a
 explain extended select * from t3 where a >= all (select b from t2 group by 1);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
-2	SUBQUERY	t2	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
+2	SUBQUERY	t2	system	NULL	NULL	NULL	NULL	0	0.00	Const row not found
 Warnings:
 Note	1003	/* select#1 */ select `test`.`t3`.`a` AS `a` from `test`.`t3` where <not>(<in_optimizer>(`test`.`t3`.`a`,(/* select#2 */ select max(NULL) from `test`.`t2`) > <cache>(`test`.`t3`.`a`)))
 select * from t3 where a >= some (select b from t2 group by 1);
@@ -1674,7 +1674,7 @@ a
 explain extended select * from t3 where a >= some (select b from t2 group by 1);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
-2	SUBQUERY	t2	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
+2	SUBQUERY	t2	system	NULL	NULL	NULL	NULL	0	0.00	Const row not found
 Warnings:
 Note	1003	/* select#1 */ select `test`.`t3`.`a` AS `a` from `test`.`t3` where <nop>(<in_optimizer>(`test`.`t3`.`a`,(/* select#2 */ select min(NULL) from `test`.`t2`) <= <cache>(`test`.`t3`.`a`)))
 select * from t3 where NULL >= any (select b from t2);
@@ -3733,7 +3733,7 @@ from t1' at line 1
 explain select * from t1 where not exists
 ((select t11.i from t1 t11) union (select t12.i from t1 t12));
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	0	const row not found
+1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	0	Const row not found
 2	SUBQUERY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	no matching row in const table
 3	UNION	NULL	NULL	NULL	NULL	NULL	NULL	NULL	no matching row in const table
 NULL	UNION RESULT	<union2,3>	ALL	NULL	NULL	NULL	NULL	NULL	
@@ -6111,7 +6111,7 @@ FROM t1 AS sq4_alias1
 WHERE (sq4_alias1.col_varchar_key + NULL) IS NULL OR
 sq4_alias1.col_varchar_key = @var3;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	sq4_alias1	system	NULL	NULL	NULL	NULL	0	const row not found
+1	SIMPLE	sq4_alias1	system	NULL	NULL	NULL	NULL	0	Const row not found
 SELECT @var3:=12, sq4_alias1.*
 FROM t1 AS sq4_alias1
 WHERE (sq4_alias1.col_varchar_key + NULL) IS NULL OR
@@ -6125,7 +6125,7 @@ FROM t1 AS sq4_alias1
 WHERE (sq4_alias1.col_varchar_key + NULL) IS NULL OR
 sq4_alias1.col_varchar_key = @var3 ) AS alias3;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	PRIMARY	<derived2>	system	NULL	NULL	NULL	NULL	0	const row not found
+1	PRIMARY	<derived2>	system	NULL	NULL	NULL	NULL	0	Const row not found
 2	DERIVED	NULL	NULL	NULL	NULL	NULL	NULL	NULL	no matching row in const table
 SELECT * FROM ( SELECT @var3:=12, sq4_alias1.*
 FROM t1 AS sq4_alias1
@@ -6711,7 +6711,7 @@ CREATE TABLE t2 (b INT);
 EXPLAIN
 SELECT SUM(a) AS f1, a AS f2 FROM (t1, t2) HAVING f2 >= ALL (SELECT 4 UNION SELECT 5) AND f1 = 7;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	PRIMARY	t2	system	NULL	NULL	NULL	NULL	0	const row not found
+1	PRIMARY	t2	system	NULL	NULL	NULL	NULL	0	Const row not found
 1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	2	
 2	SUBQUERY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used
 3	UNION	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used

mysql-test/r/union.result

@@ -1634,8 +1634,8 @@ UNION
 SELECT a FROM t1
 ORDER BY a;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
-1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
-2	UNION	t1	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
+1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	0	0.00	Const row not found
+2	UNION	t1	system	NULL	NULL	NULL	NULL	0	0.00	Const row not found
 NULL	UNION RESULT	<union1,2>	ALL	NULL	NULL	NULL	NULL	NULL	NULL	Using filesort
 Warnings:
 Note	1003	/* select#1 */ select NULL AS `a` from `test`.`t1` union /* select#2 */ select NULL AS `a` from `test`.`t1` order by `a`

mysql-test/r/view.result

@@ -2934,10 +2934,10 @@ CREATE TABLE t1 (s1 int);
 CREATE VIEW v1 AS SELECT * FROM t1;
 EXPLAIN SELECT * FROM t1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	system	NULL	NULL	NULL	NULL	0	const row not found
+1	SIMPLE	t1	system	NULL	NULL	NULL	NULL	0	Const row not found
 EXPLAIN SELECT * FROM v1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	system	NULL	NULL	NULL	NULL	0	const row not found
+1	SIMPLE	t1	system	NULL	NULL	NULL	NULL	0	Const row not found
 INSERT INTO t1 VALUES (1), (3), (2);
 EXPLAIN SELECT * FROM t1 t WHERE t.s1+1 < (SELECT MAX(t1.s1) FROM t1);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
@@ -4609,7 +4609,7 @@ WHERE t4.a >= t1.a);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	PRIMARY	t2	system	NULL	NULL	NULL	NULL	1	100.00	
 1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where
-2	DEPENDENT SUBQUERY	t3	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
+2	DEPENDENT SUBQUERY	t3	system	NULL	NULL	NULL	NULL	0	0.00	Const row not found
 2	DEPENDENT SUBQUERY	t4	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where
 Warnings:
 Note	1276	Field or reference 'test.t1.a' of SELECT #2 was resolved in SELECT #1
@@ -4625,7 +4625,7 @@ WHERE t4.a >= v1.a);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	PRIMARY	t2	system	NULL	NULL	NULL	NULL	1	100.00	
 1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where
-2	DEPENDENT SUBQUERY	t3	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
+2	DEPENDENT SUBQUERY	t3	system	NULL	NULL	NULL	NULL	0	0.00	Const row not found
 2	DEPENDENT SUBQUERY	t4	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where
 Warnings:
 Note	1276	Field or reference 'v1.a' of SELECT #2 was resolved in SELECT #1
@@ -4657,7 +4657,7 @@ id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	PRIMARY	t3	system	NULL	NULL	NULL	NULL	1	100.00	
 1	PRIMARY	t4	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where
 2	DEPENDENT SUBQUERY	t2	system	NULL	NULL	NULL	NULL	1	100.00	
-2	DEPENDENT SUBQUERY	t1	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
+2	DEPENDENT SUBQUERY	t1	system	NULL	NULL	NULL	NULL	0	0.00	Const row not found
 Warnings:
 Note	1276	Field or reference 'test.t4.b' of SELECT #2 was resolved in SELECT #1
 Note	1003	/* select#1 */ select 0 AS `c`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t4`.`c` AS `c` from `test`.`t4` where `test`.`t4`.`c` <= <expr_cache><`test`.`t4`.`b`>((/* select#2 */ select 0 from dual where 7 > `test`.`t4`.`b`))
@@ -4674,7 +4674,7 @@ id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	PRIMARY	t3	system	NULL	NULL	NULL	NULL	1	100.00	
 1	PRIMARY	t4	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where
 2	DEPENDENT SUBQUERY	t2	system	NULL	NULL	NULL	NULL	1	100.00	
-2	DEPENDENT SUBQUERY	t1	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
+2	DEPENDENT SUBQUERY	t1	system	NULL	NULL	NULL	NULL	0	0.00	Const row not found
 Warnings:
 Note	1276	Field or reference 'v4.b' of SELECT #2 was resolved in SELECT #1
 Note	1003	/* select#1 */ select 0 AS `c`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t4`.`c` AS `c` from `test`.`t4` where `test`.`t4`.`c` <= <expr_cache><`test`.`t4`.`b`>((/* select#2 */ select 0 from dual where 7 > `test`.`t4`.`b`))

mysql-test/r/view_grant.result

@@ -144,7 +144,7 @@ revoke select on mysqltest.v5 from mysqltest_1@localhost;
 connection user1;
 explain select c from mysqltest.v1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	system	NULL	NULL	NULL	NULL	0	const row not found
+1	SIMPLE	t1	system	NULL	NULL	NULL	NULL	0	Const row not found
 show create view mysqltest.v1;
 View	Create View	character_set_client	collation_connection
 v1	CREATE ALGORITHM=UNDEFINED DEFINER=`root`@`localhost` SQL SECURITY DEFINER VIEW `mysqltest`.`v1` AS select `mysqltest`.`t1`.`a` + 1 AS `c`,`mysqltest`.`t1`.`b` + 1 AS `d` from `mysqltest`.`t1`	latin1	latin1_swedish_ci
@@ -167,13 +167,13 @@ grant show view on mysqltest.* to mysqltest_1@localhost;
 connection user1;
 explain select c from mysqltest.v1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	system	NULL	NULL	NULL	NULL	0	const row not found
+1	SIMPLE	t1	system	NULL	NULL	NULL	NULL	0	Const row not found
 show create view mysqltest.v1;
 View	Create View	character_set_client	collation_connection
 v1	CREATE ALGORITHM=UNDEFINED DEFINER=`root`@`localhost` SQL SECURITY DEFINER VIEW `mysqltest`.`v1` AS select `mysqltest`.`t1`.`a` + 1 AS `c`,`mysqltest`.`t1`.`b` + 1 AS `d` from `mysqltest`.`t1`	latin1	latin1_swedish_ci
 explain select c from mysqltest.v2;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	PRIMARY	<derived2>	system	NULL	NULL	NULL	NULL	0	const row not found
+1	PRIMARY	<derived2>	system	NULL	NULL	NULL	NULL	0	Const row not found
 2	DERIVED	NULL	NULL	NULL	NULL	NULL	NULL	NULL	no matching row in const table
 show create view mysqltest.v2;
 View	Create View	character_set_client	collation_connection
@@ -1190,7 +1190,7 @@ select * from v1;
 i
 explain select * from v1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	system	NULL	NULL	NULL	NULL	0	const row not found
+1	SIMPLE	t1	system	NULL	NULL	NULL	NULL	0	Const row not found
 disconnect test11765687;
 ... as eugene
 connect  test11765687,localhost,eugene,,mysqltest1;
@@ -1238,12 +1238,12 @@ select k from t3;
 k
 explain select k from t3;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t3	system	NULL	NULL	NULL	NULL	0	const row not found
+1	SIMPLE	t3	system	NULL	NULL	NULL	NULL	0	Const row not found
 select * from v3;
 k
 explain select * from v3;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t3	system	NULL	NULL	NULL	NULL	0	const row not found
+1	SIMPLE	t3	system	NULL	NULL	NULL	NULL	0	Const row not found
 disconnect test11765687;
 ... as inga
 connect  test11765687,localhost,inga,,mysqltest1;
@@ -1284,8 +1284,8 @@ select * from v2;
 i	j
 explain select * from v2;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	system	NULL	NULL	NULL	NULL	0	const row not found
-1	SIMPLE	t2	system	NULL	NULL	NULL	NULL	0	const row not found
+1	SIMPLE	t1	system	NULL	NULL	NULL	NULL	0	Const row not found
+1	SIMPLE	t2	system	NULL	NULL	NULL	NULL	0	Const row not found
 disconnect test11765687;
 ... as noam
 connect  test11765687,localhost,noam,,mysqltest1;

mysql-test/suite/innodb/r/innodb_mysql.result

@@ -238,14 +238,14 @@ select 1, max(1) from t1i where 1=99;
 1	NULL
 explain select count(*), min(7), max(7) from t1m, t1i;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1m	system	NULL	NULL	NULL	NULL	0	const row not found
+1	SIMPLE	t1m	system	NULL	NULL	NULL	NULL	0	Const row not found
 1	SIMPLE	t1i	ALL	NULL	NULL	NULL	NULL	1	
 select count(*), min(7), max(7) from t1m, t1i;
 count(*)	min(7)	max(7)
 0	NULL	NULL
 explain select count(*), min(7), max(7) from t1m, t2i;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1m	system	NULL	NULL	NULL	NULL	0	const row not found
+1	SIMPLE	t1m	system	NULL	NULL	NULL	NULL	0	Const row not found
 1	SIMPLE	t2i	ALL	NULL	NULL	NULL	NULL	1	
 select count(*), min(7), max(7) from t1m, t2i;
 count(*)	min(7)	max(7)
@@ -1853,7 +1853,7 @@ explain
 select b from t1 where a not in (select max(b) from t1,t2 group by a) group by a;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	PRIMARY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Impossible WHERE noticed after reading const tables
-2	DEPENDENT SUBQUERY	t1	system	NULL	NULL	NULL	NULL	0	const row not found
+2	DEPENDENT SUBQUERY	t1	system	NULL	NULL	NULL	NULL	0	Const row not found
 2	DEPENDENT SUBQUERY	t2	ALL	NULL	NULL	NULL	NULL	1	
 set optimizer_switch=@save_optimizer_switch;
 DROP TABLE t1,t2;

sql/sql_explain.cc

@@ -1813,9 +1813,9 @@ const char * extra_tag_text[]=
 
   "Using join buffer", // special handling 
 
-  "const row not found",
-  "unique row not found",
-  "Impossible ON condition"
+  "Const row not found",
+  "Unique row not found",
+  "Impossible ON condition",
 };