new EXPLAIN

fixed bug in mysql-test/create-test-result
fixed bug in union-subselect engine


mysql-test/create-test-result:
  fixed bug in reject file name assembling
mysql-test/r/compare.result:
  new EXPLAIN
mysql-test/r/create.result:
  new EXPLAIN
mysql-test/r/distinct.result:
  new EXPLAIN
mysql-test/r/explain.result:
  new EXPLAIN
mysql-test/r/group_by.result:
  new EXPLAIN
mysql-test/r/heap.result:
  new EXPLAIN
mysql-test/r/heap_btree.result:
  new EXPLAIN
mysql-test/r/heap_hash.result:
  new EXPLAIN
mysql-test/r/innodb.result:
  new EXPLAIN
mysql-test/r/join_outer.result:
  new EXPLAIN
mysql-test/r/key_diff.result:
  new EXPLAIN
mysql-test/r/key_primary.result:
  new EXPLAIN
mysql-test/r/merge.result:
  new EXPLAIN
mysql-test/r/myisam.result:
  new EXPLAIN
mysql-test/r/null_key.result:
  new EXPLAIN
mysql-test/r/odbc.result:
  new EXPLAIN
mysql-test/r/order_by.result:
  new EXPLAIN
mysql-test/r/range.result:
  new EXPLAIN
mysql-test/r/select.result:
  new EXPLAIN
mysql-test/r/subselect.result:
  new EXPLAIN
mysql-test/r/type_datetime.result:
  new EXPLAIN
mysql-test/r/union.result:
  new EXPLAIN
mysql-test/r/user_var.result:
  new EXPLAIN
mysql-test/r/varbinary.result:
  new EXPLAIN
mysql-test/t/subselect.test:
  new EXPLAIN
mysql-test/t/union.test:
  new EXPLAIN
sql/mysql_priv.h:
  new EXPLAIN
sql/sql_class.cc:
  new EXPLAIN
sql/sql_class.h:
  new EXPLAIN
sql/sql_derived.cc:
  new EXPLAIN
sql/sql_lex.h:
  new EXPLAIN
sql/sql_parse.cc:
  new EXPLAIN
sql/sql_select.cc:
  new EXPLAIN
sql/sql_union.cc:
  fixed bug in subselect-UNION engine
sql/table.h:
  new EXPLAIN

1 files changed, 23 insertions, 0 deletions

diff --git a/mysql-test/r/subselect.result b/mysql-test/r/subselect.result
index dada87803ad..54528f58697 100644
--- a/mysql-test/r/subselect.result
+++ b/mysql-test/r/subselect.result
@@ -46,6 +46,13 @@ a	b
 2	7
 3	8
 4	8
+explain select * from t2 where t2.b=(select a from t3 order by 1 desc limit 1) 
+union (select * from t4 where t4.b=(select max(t2.a)*4 from t2) order by a);
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	FIRST	t2	ALL	NULL	NULL	NULL	NULL	2	where used
+3	UNION	t4	ALL	NULL	NULL	NULL	NULL	3	where used; Using filesort
+4	SUBSELECT	t2	ALL	NULL	NULL	NULL	NULL	2	
+2	SUBSELECT	t3	ALL	NULL	NULL	NULL	NULL	3	Using filesort
 select (select a from t3 where a<t2.a*4 order by 1 desc limit 1), a from t2;
 (select a from t3 where a<t2.a*4 order by 1 desc limit 1)	a
 3	1
@@ -54,6 +61,12 @@ select (select t3.a from t3 where a<8 order by 1 desc limit 1), a from
 (select * from t2 where a>1) as tt;
 (select t3.a from t3 where a<8 order by 1 desc limit 1)	a
 7	2
+explain select (select t3.a from t3 where a<8 order by 1 desc limit 1), a from 
+(select * from t2 where a>1) as tt;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+3	DERIVED	t2	ALL	NULL	NULL	NULL	NULL	2	where used
+1	FIRST	<derived3>	system	NULL	NULL	NULL	NULL	1	
+2	SUBSELECT	t3	ALL	NULL	NULL	NULL	NULL	3	where used; Using filesort
 select * from t1 where t1.a=(select t2.a from t2 where t2.b=(select max(a) from t3) order by 1 desc limit 1);
 a
 2
@@ -67,6 +80,11 @@ b	(select avg(t2.a+(select min(t3.a) from t3 where t3.a >= t4.a)) from t2)
 8	7.5000
 8	4.5000
 9	7.5000
+explain select b,(select avg(t2.a+(select min(t3.a) from t3 where t3.a >= t4.a)) from t2) from t4;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	FIRST	t4	ALL	NULL	NULL	NULL	NULL	3	
+2	DEPENDENT SUBSELECT	t2	ALL	NULL	NULL	NULL	NULL	2	
+3	DEPENDENT SUBSELECT	t3	ALL	NULL	NULL	NULL	NULL	3	where used
 select * from t3 where exists (select * from t2 where t2.b=t3.a);
 a
 7
@@ -97,6 +115,11 @@ select (select a from t1 where t1.a=t2.a union select a from t5 where t5.a=t2.a)
 (select a from t1 where t1.a=t2.a union select a from t5 where t5.a=t2.a)	a
 NULL	1
 2	2
+explain select (select a from t1 where t1.a=t2.a union select a from t5 where t5.a=t2.a), a from t2;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	FIRST	t2	ALL	NULL	NULL	NULL	NULL	2	
+2	DEPENDENT SUBSELECT	t1	system	NULL	NULL	NULL	NULL	1	where used
+3	DEPENDENT UNION	t5	ALL	NULL	NULL	NULL	NULL	2	where used
 select (select a from t1 where t1.a=t2.a union all select a from t5 where t5.a=t2.a), a from t2;
 Subselect return more than 1 record
 create table attend (patient_uq int, clinic_uq int, index i1 (clinic_uq));