WL#2486 - natural and using join according to SQL:2003

* Provide backwards compatibility extension to name resolution of
  coalesced columns. The patch allows such columns to be qualified
  with a table (and db) name, as it is in 4.1.
  Based on a patch from Monty.

* Adjusted tests accordingly to test both backwards compatible name
  resolution of qualified columns, and ANSI-style resolution of
  non-qualified columns.
  For this, each affected test has two versions - one with qualified
  columns, and one without. 


mysql-test/include/ps_query.inc:
  Put back old tests to test that coalesced columns of natural joins can be qualified.
mysql-test/r/bdb.result:
  Put back old tests to test that coalesced columns of natural joins can be qualified.
mysql-test/r/innodb.result:
  Put back old tests to test that coalesced columns of natural joins can be qualified.
mysql-test/r/join.result:
  Put back old tests to test that coalesced columns of natural joins can be qualified.
mysql-test/r/join_nested.result:
  Put back old tests to test that coalesced columns of natural joins can be qualified.
mysql-test/r/join_outer.result:
  Put back old tests to test that coalesced columns of natural joins can be qualified.
mysql-test/r/null_key.result:
  Put back old tests to test that coalesced columns of natural joins can be qualified.
mysql-test/r/order_by.result:
  Put back old tests to test that coalesced columns of natural joins can be qualified.
mysql-test/r/ps_2myisam.result:
  Put back old tests to test that coalesced columns of natural joins can be qualified.
mysql-test/r/ps_3innodb.result:
  Put back old tests to test that coalesced columns of natural joins can be qualified.
mysql-test/r/ps_4heap.result:
  Put back old tests to test that coalesced columns of natural joins can be qualified.
mysql-test/r/ps_5merge.result:
  Put back old tests to test that coalesced columns of natural joins can be qualified.
mysql-test/r/ps_6bdb.result:
  Put back old tests to test that coalesced columns of natural joins can be qualified.
mysql-test/r/ps_7ndb.result:
  Put back old tests to test that coalesced columns of natural joins can be qualified.
mysql-test/r/select.result:
  Put back old tests to test that coalesced columns of natural joins can be qualified.
mysql-test/r/subselect.result:
  Put back old tests to test that coalesced columns of natural joins can be qualified.
mysql-test/r/type_ranges.result:
  Put back old tests to test that coalesced columns of natural joins can be qualified.
mysql-test/t/bdb.test:
  Put back old tests to test that coalesced columns of natural joins can be qualified.
mysql-test/t/innodb.test:
  Put back old tests to test that coalesced columns of natural joins can be qualified.
mysql-test/t/join.test:
  Put back old tests to test that coalesced columns of natural joins can be qualified.
mysql-test/t/join_nested.test:
  Put back old tests to test that coalesced columns of natural joins can be qualified.
mysql-test/t/join_outer.test:
  Put back old tests to test that coalesced columns of natural joins can be qualified.
mysql-test/t/null_key.test:
  Put back old tests to test that coalesced columns of natural joins can be qualified.
mysql-test/t/order_by.test:
  Put back old tests to test that coalesced columns of natural joins can be qualified.
mysql-test/t/select.test:
  Put back old tests to test that coalesced columns of natural joins can be qualified.
mysql-test/t/subselect.test:
  Put back old tests to test that coalesced columns of natural joins can be qualified.
mysql-test/t/type_ranges.test:
  Put back old tests to test that coalesced columns of natural joins can be qualified.
sql/sql_base.cc:
  * Applied Monty's patch for backwards compatible name resolution
    of qualified columns. The idea is:
    - When a column is qualified, search for the column in all
      tables/views underlying each natural join. In this case
      natural joins are *not* considered leaves.
    - If a column is not qualified, then consider natural joins
      as leaves, thus directly search the result columns of
      natural joins.
  * Simplified 'find_field_in_tables()' - unified two similar
    loops into one.
sql/table.cc:
  - Removed method & members not needed after Monty's patch.
sql/table.h:
  - Removed method & members not needed after Monty's patch.
tests/mysql_client_test.c:
  Put back old tests to test that coalesced columns of natural joins can be qualified.

mysql-test/include/ps_query.inc

@@ -349,14 +349,14 @@ drop table if exists t2 ;
 --enable_warnings
 create table t2 as select * from t1 ;
 set @query1= 'SELECT * FROM t2 join t1 on (t1.a=t2.a) order by t2.a ' ;
-set @query2= 'SELECT * FROM t2 natural join t1 order by a ' ;
-set @query3= 'SELECT * FROM t2 join t1 using(a) order by a ' ;
+set @query2= 'SELECT * FROM t2 natural join t1 order by t2.a ' ;
+set @query3= 'SELECT * FROM t2 join t1 using(a) order by t2.a ' ;
 set @query4= 'SELECT * FROM t2 left join t1 on(t1.a=t2.a) order by t2.a ' ;
-set @query5= 'SELECT * FROM t2 natural left join t1 order by a ' ;
-set @query6= 'SELECT * FROM t2 left join t1 using(a) order by a ' ;
+set @query5= 'SELECT * FROM t2 natural left join t1 order by t2.a ' ;
+set @query6= 'SELECT * FROM t2 left join t1 using(a) order by t2.a ' ;
 set @query7= 'SELECT * FROM t2 right join t1 on(t1.a=t2.a) order by t2.a ' ;
-set @query8= 'SELECT * FROM t2 natural right join t1 order by a ' ;
-set @query9= 'SELECT * FROM t2 right join t1 using(a) order by a ' ;
+set @query8= 'SELECT * FROM t2 natural right join t1 order by t2.a ' ;
+set @query9= 'SELECT * FROM t2 right join t1 using(a) order by t2.a ' ;
 let $1= 9 ;
 while ($1)
 {

mysql-test/r/bdb.result

@@ -732,6 +732,11 @@ drop table t1;
 set @a:=now();
 CREATE TABLE t1 (a int not null, b timestamp not null, primary key (a)) engine=bdb;
 insert into t1 (a) values(1),(2),(3);
+select t1.a from t1 natural join t1 as t2 where t1.b >= @a order by t1.a;
+a
+1
+2
+3
 select a from t1 natural join t1 as t2 where b >= @a order by a;
 a
 1
@@ -906,7 +911,7 @@ create temporary table tmp1
 select branch_id, target_id, platform_id, product_id
 from t1, t2, t3, t4 ;
 create temporary table tmp2 
-select branch_id, target_id, platform_id, product_id 
+select tmp1.branch_id, tmp1.target_id, tmp1.platform_id, tmp1.product_id 
 from tmp1 left join t8 
 using (branch_id,target_id,platform_id,product_id) 
 where t8.archive_id is null ;

mysql-test/r/innodb.result

@@ -750,6 +750,11 @@ drop table t1;
 set @a:=now();
 CREATE TABLE t1 (a int not null, b timestamp not null, primary key (a)) engine=innodb;
 insert into t1 (a) values(1),(2),(3);
+select t1.a from t1 natural join t1 as t2 where t1.b >= @a order by t1.a;
+a
+1
+2
+3
 select a from t1 natural join t1 as t2 where b >= @a order by a;
 a
 1

mysql-test/r/join.result

@@ -121,6 +121,12 @@ id	catid	stateid	countyid
 drop table t1, t2;
 create table t1 (a int primary key);
 insert into t1 values(1),(2);
+select t1.a from t1 as t1 left join t1 as t2 using (a) left join t1 as t3 using (a) left join t1 as t4 using (a) left join t1 as t5 using (a) left join t1 as t6 using (a) left join t1 as t7 using (a) left join t1 as t8 using (a) left join t1 as t9 using (a) left join t1 as t10 using (a) left join t1 as t11 using (a) left join t1 as t12 using (a) left join t1 as t13 using (a) left join t1 as t14 using (a) left join t1 as t15 using (a) left join t1 as t16 using (a) left join t1 as t17 using (a) left join t1 as t18 using (a) left join t1 as t19 using (a) left join t1 as t20 using (a) left join t1 as t21 using (a) left join t1 as t22 using (a) left join t1 as t23 using (a) left join t1 as t24 using (a) left join t1 as t25 using (a) left join t1 as t26 using (a) left join t1 as t27 using (a) left join t1 as t28 using (a) left join t1 as t29 using (a) left join t1 as t30 using (a) left join t1 as t31 using (a);
+a
+1
+2
+select t1.a from t1 as t1 left join t1 as t2 using (a) left join t1 as t3 using (a) left join t1 as t4 using (a) left join t1 as t5 using (a) left join t1 as t6 using (a) left join t1 as t7 using (a) left join t1 as t8 using (a) left join t1 as t9 using (a) left join t1 as t10 using (a) left join t1 as t11 using (a) left join t1 as t12 using (a) left join t1 as t13 using (a) left join t1 as t14 using (a) left join t1 as t15 using (a) left join t1 as t16 using (a) left join t1 as t17 using (a) left join t1 as t18 using (a) left join t1 as t19 using (a) left join t1 as t20 using (a) left join t1 as t21 using (a) left join t1 as t22 using (a) left join t1 as t23 using (a) left join t1 as t24 using (a) left join t1 as t25 using (a) left join t1 as t26 using (a) left join t1 as t27 using (a) left join t1 as t28 using (a) left join t1 as t29 using (a) left join t1 as t30 using (a) left join t1 as t31 using (a) left join t1 as t32 using (a) left join t1 as t33 using (a) left join t1 as t34 using (a) left join t1 as t35 using (a) left join t1 as t36 using (a) left join t1 as t37 using (a) left join t1 as t38 using (a) left join t1 as t39 using (a) left join t1 as t40 using (a) left join t1 as t41 using (a) left join t1 as t42 using (a) left join t1 as t43 using (a) left join t1 as t44 using (a) left join t1 as t45 using (a) left join t1 as t46 using (a) left join t1 as t47 using (a) left join t1 as t48 using (a) left join t1 as t49 using (a) left join t1 as t50 using (a) left join t1 as t51 using (a) left join t1 as t52 using (a) left join t1 as t53 using (a) left join t1 as t54 using (a) left join t1 as t55 using (a) left join t1 as t56 using (a) left join t1 as t57 using (a) left join t1 as t58 using (a) left join t1 as t59 using (a) left join t1 as t60 using (a) left join t1 as t61 using (a) left join t1 as t62 using (a) left join t1 as t63 using (a) left join t1 as t64 using (a) left join t1 as t65 using (a);
+ERROR HY000: Too many tables; MySQL can only use XX tables in a join
 select a from t1 as t1 left join t1 as t2 using (a) left join t1 as t3 using (a) left join t1 as t4 using (a) left join t1 as t5 using (a) left join t1 as t6 using (a) left join t1 as t7 using (a) left join t1 as t8 using (a) left join t1 as t9 using (a) left join t1 as t10 using (a) left join t1 as t11 using (a) left join t1 as t12 using (a) left join t1 as t13 using (a) left join t1 as t14 using (a) left join t1 as t15 using (a) left join t1 as t16 using (a) left join t1 as t17 using (a) left join t1 as t18 using (a) left join t1 as t19 using (a) left join t1 as t20 using (a) left join t1 as t21 using (a) left join t1 as t22 using (a) left join t1 as t23 using (a) left join t1 as t24 using (a) left join t1 as t25 using (a) left join t1 as t26 using (a) left join t1 as t27 using (a) left join t1 as t28 using (a) left join t1 as t29 using (a) left join t1 as t30 using (a) left join t1 as t31 using (a);
 a
 1
@@ -145,6 +151,10 @@ DROP TABLE t1, t2;
 CREATE TABLE t1 (d DATE NOT NULL);
 CREATE TABLE t2 (d DATE NOT NULL);
 INSERT INTO t1 (d) VALUES ('2001-08-01'),('0000-00-00');
+SELECT * FROM t1 LEFT JOIN t2 USING (d) WHERE t2.d IS NULL;
+d
+2001-08-01
+0000-00-00
 SELECT * FROM t1 LEFT JOIN t2 USING (d) WHERE d IS NULL;
 d
 0000-00-00
@@ -264,6 +274,12 @@ PRIMARY KEY  (siteid,rate_code),
 FULLTEXT KEY rate_code (rate_code)
 ) ENGINE=MyISAM;
 INSERT INTO t2 VALUES ('rivercats','cust',20);
+SELECT emp.rate_code, lr.base_rate FROM t1 AS emp LEFT JOIN t2 AS lr USING (siteid, rate_code) WHERE emp.emp_id = 'psmith' AND lr.siteid = 'rivercats';
+rate_code	base_rate
+cust	20
+SELECT emp.rate_code, lr.base_rate FROM t1 AS emp LEFT JOIN t2 AS lr USING (siteid, rate_code) WHERE lr.siteid = 'rivercats' AND emp.emp_id = 'psmith';
+rate_code	base_rate
+cust	20
 SELECT rate_code, lr.base_rate FROM t1 AS emp LEFT JOIN t2 AS lr USING (siteid, rate_code) WHERE emp.emp_id = 'psmith' AND siteid = 'rivercats';
 rate_code	base_rate
 cust	20
@@ -326,7 +342,7 @@ select * from t3 right join t2 on (t3.i=t2.i) right join t1 on (t2.i=t1.i);
 i	i	i
 NULL	NULL	1
 2	2	2
-select * from t1,t2 natural left join t3 order by 1,2;
+select * from t1,t2 natural left join t3 order by t1.i,t2.i,t3.i;
 i	i
 1	2
 1	3
@@ -338,36 +354,36 @@ i	i	i
 1	3	NULL
 2	2	2
 2	3	NULL
-select * from t2 natural left join t3,t1 order by t1.i;
-i	i
-2	1
-3	1
-2	2
-3	2
+select t1.i,t2.i,t3.i from t2 natural left join t3,t1 order by t1.i,t2.i,t3.i;
+i	i	i
+1	2	2
+1	3	NULL
+2	2	2
+2	3	NULL
 select t1.i,t2.i,t3.i from t2 left join t3 on (t2.i=t3.i),t1 order by t1.i,t2.i,t3.i;
 i	i	i
 1	2	2
 1	3	NULL
 2	2	2
 2	3	NULL
-select * from t1,t2 natural right join t3 order by 1,2;
+select * from t1,t2 natural right join t3 order by t1.i,t2.i,t3.i;
 i	i
-1	2
 1	4
-2	2
+1	2
 2	4
+2	2
 select * from t1,t2 right join t3 on (t2.i=t3.i) order by t1.i,t2.i,t3.i;
 i	i	i
 1	NULL	4
 1	2	2
 2	NULL	4
 2	2	2
-select * from t2 natural right join t3,t1 order by t1.i;
-i	i
-2	1
-4	1
-2	2
-4	2
+select t1.i,t2.i,t3.i from t2 natural right join t3,t1 order by t1.i,t2.i,t3.i;
+i	i	i
+1	NULL	4
+1	2	2
+2	NULL	4
+2	2	2
 select t1.i,t2.i,t3.i from t2 right join t3 on (t2.i=t3.i),t1 order by t1.i,t2.i,t3.i;
 i	i	i
 1	NULL	4

mysql-test/r/join_nested.result

@@ -1153,13 +1153,13 @@ a	b	a1	b
 4	2	1	2
 4	2	2	2
 5	3	NULL	NULL
-SELECT *
+SELECT t2.a,t2.b,t3.a1,t3.b
 FROM t2 NATURAL LEFT JOIN t3
 WHERE t2.a = 4 OR (t2.a > 4 AND t3.a1 IS NULL);
-b	a	c	a1	c1
-2	4	0	1	0
-2	4	0	2	0
-3	5	0	NULL	NULL
+a	b	a1	b
+4	2	1	2
+4	2	2	2
+5	3	NULL	NULL
 DROP TABLE t0,t1,t2,t3,t4,t5,t6,t7,t8,t9;
 CREATE TABLE t1 (a int);
 CREATE TABLE t2 (a int);

mysql-test/r/join_outer.result

@@ -36,16 +36,7 @@ grp	a	c	id	a	c	d
 3	5	C	3	5	B	5
 3	6	D	3	6	C	6
 NULL	NULL	NULL	4	7	D	7
-select * from t1 left join t2 using (a);
-a	grp	c	id	c	d
-1	1	a	1	a	1
-2	2	b	NULL	NULL	NULL
-3	2	c	NULL	NULL	NULL
-4	3	E	3	A	4
-5	3	C	3	B	5
-6	3	D	3	C	6
-NULL	NULL		NULL	NULL	NULL
-select t1.*,t2.* from t1 left join t2 on t1.a=t2.a;
+select t1.*,t2.* from t1 left join t2 using (a);
 grp	a	c	id	a	c	d
 1	1	a	1	1	a	1
 2	2	b	NULL	NULL	NULL	NULL
@@ -54,34 +45,40 @@ grp	a	c	id	a	c	d
 3	5	C	3	5	B	5
 3	6	D	3	6	C	6
 NULL	NULL		NULL	NULL	NULL	NULL
-select * from t1 left join t2 using (a,c);
-a	c	grp	id	d
-1	a	1	1	1
-2	b	2	NULL	NULL
-3	c	2	NULL	NULL
-4	E	3	NULL	NULL
-5	C	3	NULL	NULL
-6	D	3	NULL	NULL
-NULL		NULL	NULL	NULL
-select * from t1 left join t2 using (c);
-c	grp	a	id	a	d
-a	1	1	1	1	1
-a	1	1	3	4	4
-b	2	2	3	5	5
-c	2	3	3	6	6
-E	3	4	NULL	NULL	NULL
-C	3	5	3	6	6
-D	3	6	4	7	7
-	NULL	NULL	NULL	NULL	NULL
-select * from t1 natural left outer join t2;
-a	c	grp	id	d
-1	a	1	1	1
-2	b	2	NULL	NULL
-3	c	2	NULL	NULL
-4	E	3	NULL	NULL
-5	C	3	NULL	NULL
-6	D	3	NULL	NULL
-NULL		NULL	NULL	NULL
+select t1.*,t2.* from t1 left join t2 using (a) where t1.a=t2.a;
+grp	a	c	id	a	c	d
+1	1	a	1	1	a	1
+3	4	E	3	4	A	4
+3	5	C	3	5	B	5
+3	6	D	3	6	C	6
+select t1.*,t2.* from t1 left join t2 using (a,c);
+grp	a	c	id	a	c	d
+1	1	a	1	1	a	1
+2	2	b	NULL	NULL	NULL	NULL
+2	3	c	NULL	NULL	NULL	NULL
+3	4	E	NULL	NULL	NULL	NULL
+3	5	C	NULL	NULL	NULL	NULL
+3	6	D	NULL	NULL	NULL	NULL
+NULL	NULL		NULL	NULL	NULL	NULL
+select t1.*,t2.* from t1 left join t2 using (c);
+grp	a	c	id	a	c	d
+1	1	a	1	1	a	1
+1	1	a	3	4	A	4
+2	2	b	3	5	B	5
+2	3	c	3	6	C	6
+3	4	E	NULL	NULL	NULL	NULL
+3	5	C	3	6	C	6
+3	6	D	4	7	D	7
+NULL	NULL		NULL	NULL	NULL	NULL
+select t1.*,t2.* from t1 natural left outer join t2;
+grp	a	c	id	a	c	d
+1	1	a	1	1	a	1
+2	2	b	NULL	NULL	NULL	NULL
+2	3	c	NULL	NULL	NULL	NULL
+3	4	E	NULL	NULL	NULL	NULL
+3	5	C	NULL	NULL	NULL	NULL
+3	6	D	NULL	NULL	NULL	NULL
+NULL	NULL		NULL	NULL	NULL	NULL
 select t1.*,t2.* from t1 left join t2 on (t1.a=t2.a) where t2.id=3;
 grp	a	c	id	a	c	d
 3	4	E	3	4	A	4
@@ -114,21 +111,21 @@ select t1.*,t2.*,t3.a from t1 left join t2 on (t3.a=t2.a) left join t1 as t3 on
 ERROR 42S22: Unknown column 't3.a' in 'on clause'
 select t1.*,t2.*,t3.a from t1 left join t2 on (t3.a=t2.a) left join t1 as t3 on (t2.a=t3.a);
 ERROR 42S22: Unknown column 't3.a' in 'on clause'
-select * from t1 inner join t2 using (a);
-a	grp	c	id	c	d
-1	1	a	1	a	1
-4	3	E	3	A	4
-5	3	C	3	B	5
-6	3	D	3	C	6
+select t1.*,t2.* from t1 inner join t2 using (a);
+grp	a	c	id	a	c	d
+1	1	a	1	1	a	1
+3	4	E	3	4	A	4
+3	5	C	3	5	B	5
+3	6	D	3	6	C	6
 select t1.*,t2.* from t1 inner join t2 on (t1.a=t2.a);
 grp	a	c	id	a	c	d
 1	1	a	1	1	a	1
 3	4	E	3	4	A	4
 3	5	C	3	5	B	5
 3	6	D	3	6	C	6
-select * from t1 natural join t2;
-a	c	grp	id	d
-1	a	1	1	1
+select t1.*,t2.* from t1 natural join t2;
+grp	a	c	id	a	c	d
+1	1	a	1	1	a	1
 drop table t1,t2;
 CREATE TABLE t1 (
 usr_id INT unsigned NOT NULL,
@@ -435,7 +432,7 @@ INSERT INTO t2 VALUES (3,'z');
 SELECT t2.id2 FROM t2 LEFT OUTER JOIN t1 ON t1.id2 = t2.id2 WHERE id1 IS NULL;
 id2
 3
-SELECT id2 FROM t2 NATURAL LEFT OUTER JOIN t1 WHERE id1 IS NULL;
+SELECT t2.id2 FROM t2 NATURAL LEFT OUTER JOIN t1 WHERE id1 IS NULL;
 id2
 3
 drop table t1,t2;
@@ -653,6 +650,13 @@ select * from t1 natural left join t2 natural left join t3;
 i
 1
 2
+select * from t1 natural left join t2 where (t2.i is not null)=0;
+i
+1
+select * from t1 natural left join t2 where (t2.i is not null) is not null;
+i
+1
+2
 select * from t1 natural left join t2 where (i is not null)=0;
 i
 select * from t1 natural left join t2 where (i is not null) is not null;
@@ -931,6 +935,18 @@ create table t1 (a int, b varchar(20));
 create table t2 (a int, c varchar(20));
 insert into t1 values (1,"aaaaaaaaaa"),(2,"bbbbbbbbbb");
 insert into t2 values (1,"cccccccccc"),(2,"dddddddddd");
+select group_concat(t1.b,t2.c) from t1 left join t2 using(a) group by t1.a;
+group_concat(t1.b,t2.c)
+aaaaa
+bbbbb
+Warnings:
+Warning	1260	2 line(s) were cut by GROUP_CONCAT()
+select group_concat(t1.b,t2.c) from t1 inner join t2 using(a) group by t1.a;
+group_concat(t1.b,t2.c)
+aaaaa
+bbbbb
+Warnings:
+Warning	1260	2 line(s) were cut by GROUP_CONCAT()
 select group_concat(t1.b,t2.c) from t1 left join t2 using(a) group by a;
 group_concat(t1.b,t2.c)
 aaaaa

mysql-test/r/null_key.result

@@ -313,16 +313,12 @@ INSERT INTO t1 (order_id, product_id, product_type) VALUES
 ('9d9aad7764b5b2c53004348ef8d34500',2315652, 3);
 INSERT INTO t2 (order_id, product_id, product_type) VALUES
 ('9d9aad7764b5b2c53004348ef8d34500',2315652, 3);
-select t1.* from t1 left join t2
-on (t1.order_id = t2.order_id and
-t1.product_id = t2.product_id and
-t1.product_type = t2.product_type)
-where t2.order_id = NULL;
+select t1.* from t1
+left join t2 using(order_id, product_id, product_type)
+where t2.order_id=NULL;
 order_id	product_id	product_type
-select t1.* from t1 left join t2
-on (t1.order_id = t2.order_id and
-t1.product_id = t2.product_id and
-t1.product_type = t2.product_type)
+select t1.* from t1
+left join t2 using(order_id, product_id, product_type)
 where t2.order_id is NULL;
 order_id	product_id	product_type
 3d7ce39b5d4b3e3d22aaafe9b633de51	1206029	3

mysql-test/r/order_by.result

@@ -180,6 +180,15 @@ INSERT INTO t3 VALUES (1,'123 Park Place');
 INSERT INTO t3 VALUES (2,'453 Boardwalk');
 SELECT    a,b,if(b = 1,i,if(b = 2,v,''))
 FROM      t1
+LEFT JOIN t2 USING(c)
+LEFT JOIN t3 ON t3.c = t1.c;
+a	b	if(b = 1,i,if(b = 2,v,''))
+1	1	50
+2	1	25
+3	2	123 Park Place
+4	2	453 Boardwalk
+SELECT    a,b,if(b = 1,i,if(b = 2,v,''))
+FROM      t1
 LEFT JOIN t2 ON t1.c = t2.c
 LEFT JOIN t3 ON t3.c = t1.c;
 a	b	if(b = 1,i,if(b = 2,v,''))
@@ -189,6 +198,16 @@ a	b	if(b = 1,i,if(b = 2,v,''))
 4	2	453 Boardwalk
 SELECT    a,b,if(b = 1,i,if(b = 2,v,''))
 FROM      t1
+LEFT JOIN t2 USING(c)
+LEFT JOIN t3 ON t3.c = t1.c
+ORDER BY a;
+a	b	if(b = 1,i,if(b = 2,v,''))
+1	1	50
+2	1	25
+3	2	123 Park Place
+4	2	453 Boardwalk
+SELECT    a,b,if(b = 1,i,if(b = 2,v,''))
+FROM      t1
 LEFT JOIN t2 ON t1.c = t2.c
 LEFT JOIN t3 ON t3.c = t1.c
 ORDER BY a;
@@ -523,9 +542,15 @@ KEY `pseudo` (`pseudo`)
 );
 INSERT INTO t1 (titre,auteur,dest) VALUES ('test','joce','bug');
 INSERT INTO t2 (numeropost,pseudo) VALUES (1,'joce'),(1,'bug');
+SELECT titre,t1.numeropost,auteur,icone,nbrep,0,date,vue,ouvert,lastauteur,dest FROM t2 LEFT JOIN t1 USING(numeropost) WHERE t2.pseudo='joce' ORDER BY date DESC LIMIT 0,30;
+titre	numeropost	auteur	icone	nbrep	0	date	vue	ouvert	lastauteur	dest
+test	1	joce	0	0	0	0000-00-00 00:00:00	0	1		bug
 SELECT titre,numeropost,auteur,icone,nbrep,0,date,vue,ouvert,lastauteur,dest FROM t2 LEFT JOIN t1 USING(numeropost) WHERE t2.pseudo='joce' ORDER BY date DESC LIMIT 0,30;
 titre	numeropost	auteur	icone	nbrep	0	date	vue	ouvert	lastauteur	dest
 test	1	joce	0	0	0	0000-00-00 00:00:00	0	1		bug
+SELECT titre,t1.numeropost,auteur,icone,nbrep,'0',date,vue,ouvert,lastauteur,dest FROM t2 LEFT JOIN t1 USING(numeropost) WHERE t2.pseudo='joce' ORDER BY date DESC LIMIT 0,30;
+titre	numeropost	auteur	icone	nbrep	0	date	vue	ouvert	lastauteur	dest
+test	1	joce	0	0	0	0000-00-00 00:00:00	0	1		bug
 SELECT titre,numeropost,auteur,icone,nbrep,'0',date,vue,ouvert,lastauteur,dest FROM t2 LEFT JOIN t1 USING(numeropost) WHERE t2.pseudo='joce' ORDER BY date DESC LIMIT 0,30;
 titre	numeropost	auteur	icone	nbrep	0	date	vue	ouvert	lastauteur	dest
 test	1	joce	0	0	0	0000-00-00 00:00:00	0	1		bug

mysql-test/r/ps_2myisam.result

@@ -519,16 +519,16 @@ a	?	a
 drop table if exists t2 ;
 create table t2 as select * from t1 ;
 set @query1= 'SELECT * FROM t2 join t1 on (t1.a=t2.a) order by t2.a ' ;
-set @query2= 'SELECT * FROM t2 natural join t1 order by a ' ;
-set @query3= 'SELECT * FROM t2 join t1 using(a) order by a ' ;
+set @query2= 'SELECT * FROM t2 natural join t1 order by t2.a ' ;
+set @query3= 'SELECT * FROM t2 join t1 using(a) order by t2.a ' ;
 set @query4= 'SELECT * FROM t2 left join t1 on(t1.a=t2.a) order by t2.a ' ;
-set @query5= 'SELECT * FROM t2 natural left join t1 order by a ' ;
-set @query6= 'SELECT * FROM t2 left join t1 using(a) order by a ' ;
+set @query5= 'SELECT * FROM t2 natural left join t1 order by t2.a ' ;
+set @query6= 'SELECT * FROM t2 left join t1 using(a) order by t2.a ' ;
 set @query7= 'SELECT * FROM t2 right join t1 on(t1.a=t2.a) order by t2.a ' ;
-set @query8= 'SELECT * FROM t2 natural right join t1 order by a ' ;
-set @query9= 'SELECT * FROM t2 right join t1 using(a) order by a ' ;
+set @query8= 'SELECT * FROM t2 natural right join t1 order by t2.a ' ;
+set @query9= 'SELECT * FROM t2 right join t1 using(a) order by t2.a ' ;
 the join statement is:
-SELECT * FROM t2 right join t1 using(a) order by a 
+SELECT * FROM t2 right join t1 using(a) order by t2.a 
 prepare stmt1 from @query9  ;
 execute stmt1 ;
 a	b	b
@@ -549,7 +549,7 @@ a	b	b
 3	three	three
 4	four	four
 the join statement is:
-SELECT * FROM t2 natural right join t1 order by a 
+SELECT * FROM t2 natural right join t1 order by t2.a 
 prepare stmt1 from @query8 ;
 execute stmt1 ;
 a	b
@@ -591,7 +591,7 @@ a	b	a	b
 3	three	3	three
 4	four	4	four
 the join statement is:
-SELECT * FROM t2 left join t1 using(a) order by a 
+SELECT * FROM t2 left join t1 using(a) order by t2.a 
 prepare stmt1 from @query6 ;
 execute stmt1 ;
 a	b	b
@@ -612,7 +612,7 @@ a	b	b
 3	three	three
 4	four	four
 the join statement is:
-SELECT * FROM t2 natural left join t1 order by a 
+SELECT * FROM t2 natural left join t1 order by t2.a 
 prepare stmt1 from @query5 ;
 execute stmt1 ;
 a	b
@@ -654,7 +654,7 @@ a	b	a	b
 3	three	3	three
 4	four	4	four
 the join statement is:
-SELECT * FROM t2 join t1 using(a) order by a 
+SELECT * FROM t2 join t1 using(a) order by t2.a 
 prepare stmt1 from @query3 ;
 execute stmt1 ;
 a	b	b
@@ -675,7 +675,7 @@ a	b	b
 3	three	three
 4	four	four
 the join statement is:
-SELECT * FROM t2 natural join t1 order by a 
+SELECT * FROM t2 natural join t1 order by t2.a 
 prepare stmt1 from @query2 ;
 execute stmt1 ;
 a	b

mysql-test/r/ps_3innodb.result

@@ -519,16 +519,16 @@ a	?	a
 drop table if exists t2 ;
 create table t2 as select * from t1 ;
 set @query1= 'SELECT * FROM t2 join t1 on (t1.a=t2.a) order by t2.a ' ;
-set @query2= 'SELECT * FROM t2 natural join t1 order by a ' ;
-set @query3= 'SELECT * FROM t2 join t1 using(a) order by a ' ;
+set @query2= 'SELECT * FROM t2 natural join t1 order by t2.a ' ;
+set @query3= 'SELECT * FROM t2 join t1 using(a) order by t2.a ' ;
 set @query4= 'SELECT * FROM t2 left join t1 on(t1.a=t2.a) order by t2.a ' ;
-set @query5= 'SELECT * FROM t2 natural left join t1 order by a ' ;
-set @query6= 'SELECT * FROM t2 left join t1 using(a) order by a ' ;
+set @query5= 'SELECT * FROM t2 natural left join t1 order by t2.a ' ;
+set @query6= 'SELECT * FROM t2 left join t1 using(a) order by t2.a ' ;
 set @query7= 'SELECT * FROM t2 right join t1 on(t1.a=t2.a) order by t2.a ' ;
-set @query8= 'SELECT * FROM t2 natural right join t1 order by a ' ;
-set @query9= 'SELECT * FROM t2 right join t1 using(a) order by a ' ;
+set @query8= 'SELECT * FROM t2 natural right join t1 order by t2.a ' ;
+set @query9= 'SELECT * FROM t2 right join t1 using(a) order by t2.a ' ;
 the join statement is:
-SELECT * FROM t2 right join t1 using(a) order by a 
+SELECT * FROM t2 right join t1 using(a) order by t2.a 
 prepare stmt1 from @query9  ;
 execute stmt1 ;
 a	b	b
@@ -549,7 +549,7 @@ a	b	b
 3	three	three
 4	four	four
 the join statement is:
-SELECT * FROM t2 natural right join t1 order by a 
+SELECT * FROM t2 natural right join t1 order by t2.a 
 prepare stmt1 from @query8 ;
 execute stmt1 ;
 a	b
@@ -591,7 +591,7 @@ a	b	a	b
 3	three	3	three
 4	four	4	four
 the join statement is:
-SELECT * FROM t2 left join t1 using(a) order by a 
+SELECT * FROM t2 left join t1 using(a) order by t2.a 
 prepare stmt1 from @query6 ;
 execute stmt1 ;
 a	b	b
@@ -612,7 +612,7 @@ a	b	b
 3	three	three
 4	four	four
 the join statement is:
-SELECT * FROM t2 natural left join t1 order by a 
+SELECT * FROM t2 natural left join t1 order by t2.a 
 prepare stmt1 from @query5 ;
 execute stmt1 ;
 a	b
@@ -654,7 +654,7 @@ a	b	a	b
 3	three	3	three
 4	four	4	four
 the join statement is:
-SELECT * FROM t2 join t1 using(a) order by a 
+SELECT * FROM t2 join t1 using(a) order by t2.a 
 prepare stmt1 from @query3 ;
 execute stmt1 ;
 a	b	b
@@ -675,7 +675,7 @@ a	b	b
 3	three	three
 4	four	four
 the join statement is:
-SELECT * FROM t2 natural join t1 order by a 
+SELECT * FROM t2 natural join t1 order by t2.a 
 prepare stmt1 from @query2 ;
 execute stmt1 ;
 a	b

mysql-test/r/ps_4heap.result

@@ -520,16 +520,16 @@ a	?	a
 drop table if exists t2 ;
 create table t2 as select * from t1 ;
 set @query1= 'SELECT * FROM t2 join t1 on (t1.a=t2.a) order by t2.a ' ;
-set @query2= 'SELECT * FROM t2 natural join t1 order by a ' ;
-set @query3= 'SELECT * FROM t2 join t1 using(a) order by a ' ;
+set @query2= 'SELECT * FROM t2 natural join t1 order by t2.a ' ;
+set @query3= 'SELECT * FROM t2 join t1 using(a) order by t2.a ' ;
 set @query4= 'SELECT * FROM t2 left join t1 on(t1.a=t2.a) order by t2.a ' ;
-set @query5= 'SELECT * FROM t2 natural left join t1 order by a ' ;
-set @query6= 'SELECT * FROM t2 left join t1 using(a) order by a ' ;
+set @query5= 'SELECT * FROM t2 natural left join t1 order by t2.a ' ;
+set @query6= 'SELECT * FROM t2 left join t1 using(a) order by t2.a ' ;
 set @query7= 'SELECT * FROM t2 right join t1 on(t1.a=t2.a) order by t2.a ' ;
-set @query8= 'SELECT * FROM t2 natural right join t1 order by a ' ;
-set @query9= 'SELECT * FROM t2 right join t1 using(a) order by a ' ;
+set @query8= 'SELECT * FROM t2 natural right join t1 order by t2.a ' ;
+set @query9= 'SELECT * FROM t2 right join t1 using(a) order by t2.a ' ;
 the join statement is:
-SELECT * FROM t2 right join t1 using(a) order by a 
+SELECT * FROM t2 right join t1 using(a) order by t2.a 
 prepare stmt1 from @query9  ;
 execute stmt1 ;
 a	b	b
@@ -550,7 +550,7 @@ a	b	b
 3	three	three
 4	four	four
 the join statement is:
-SELECT * FROM t2 natural right join t1 order by a 
+SELECT * FROM t2 natural right join t1 order by t2.a 
 prepare stmt1 from @query8 ;
 execute stmt1 ;
 a	b
@@ -592,7 +592,7 @@ a	b	a	b
 3	three	3	three
 4	four	4	four
 the join statement is:
-SELECT * FROM t2 left join t1 using(a) order by a 
+SELECT * FROM t2 left join t1 using(a) order by t2.a 
 prepare stmt1 from @query6 ;
 execute stmt1 ;
 a	b	b
@@ -613,7 +613,7 @@ a	b	b
 3	three	three
 4	four	four
 the join statement is:
-SELECT * FROM t2 natural left join t1 order by a 
+SELECT * FROM t2 natural left join t1 order by t2.a 
 prepare stmt1 from @query5 ;
 execute stmt1 ;
 a	b
@@ -655,7 +655,7 @@ a	b	a	b
 3	three	3	three
 4	four	4	four
 the join statement is:
-SELECT * FROM t2 join t1 using(a) order by a 
+SELECT * FROM t2 join t1 using(a) order by t2.a 
 prepare stmt1 from @query3 ;
 execute stmt1 ;
 a	b	b
@@ -676,7 +676,7 @@ a	b	b
 3	three	three
 4	four	four
 the join statement is:
-SELECT * FROM t2 natural join t1 order by a 
+SELECT * FROM t2 natural join t1 order by t2.a 
 prepare stmt1 from @query2 ;
 execute stmt1 ;
 a	b

mysql-test/r/ps_5merge.result

@@ -562,16 +562,16 @@ a	?	a
 drop table if exists t2 ;
 create table t2 as select * from t1 ;
 set @query1= 'SELECT * FROM t2 join t1 on (t1.a=t2.a) order by t2.a ' ;
-set @query2= 'SELECT * FROM t2 natural join t1 order by a ' ;
-set @query3= 'SELECT * FROM t2 join t1 using(a) order by a ' ;
+set @query2= 'SELECT * FROM t2 natural join t1 order by t2.a ' ;
+set @query3= 'SELECT * FROM t2 join t1 using(a) order by t2.a ' ;
 set @query4= 'SELECT * FROM t2 left join t1 on(t1.a=t2.a) order by t2.a ' ;
-set @query5= 'SELECT * FROM t2 natural left join t1 order by a ' ;
-set @query6= 'SELECT * FROM t2 left join t1 using(a) order by a ' ;
+set @query5= 'SELECT * FROM t2 natural left join t1 order by t2.a ' ;
+set @query6= 'SELECT * FROM t2 left join t1 using(a) order by t2.a ' ;
 set @query7= 'SELECT * FROM t2 right join t1 on(t1.a=t2.a) order by t2.a ' ;
-set @query8= 'SELECT * FROM t2 natural right join t1 order by a ' ;
-set @query9= 'SELECT * FROM t2 right join t1 using(a) order by a ' ;
+set @query8= 'SELECT * FROM t2 natural right join t1 order by t2.a ' ;
+set @query9= 'SELECT * FROM t2 right join t1 using(a) order by t2.a ' ;
 the join statement is:
-SELECT * FROM t2 right join t1 using(a) order by a 
+SELECT * FROM t2 right join t1 using(a) order by t2.a 
 prepare stmt1 from @query9  ;
 execute stmt1 ;
 a	b	b
@@ -592,7 +592,7 @@ a	b	b
 3	three	three
 4	four	four
 the join statement is:
-SELECT * FROM t2 natural right join t1 order by a 
+SELECT * FROM t2 natural right join t1 order by t2.a 
 prepare stmt1 from @query8 ;
 execute stmt1 ;
 a	b
@@ -634,7 +634,7 @@ a	b	a	b
 3	three	3	three
 4	four	4	four
 the join statement is:
-SELECT * FROM t2 left join t1 using(a) order by a 
+SELECT * FROM t2 left join t1 using(a) order by t2.a 
 prepare stmt1 from @query6 ;
 execute stmt1 ;
 a	b	b
@@ -655,7 +655,7 @@ a	b	b
 3	three	three
 4	four	four
 the join statement is:
-SELECT * FROM t2 natural left join t1 order by a 
+SELECT * FROM t2 natural left join t1 order by t2.a 
 prepare stmt1 from @query5 ;
 execute stmt1 ;
 a	b
@@ -697,7 +697,7 @@ a	b	a	b
 3	three	3	three
 4	four	4	four
 the join statement is:
-SELECT * FROM t2 join t1 using(a) order by a 
+SELECT * FROM t2 join t1 using(a) order by t2.a 
 prepare stmt1 from @query3 ;
 execute stmt1 ;
 a	b	b
@@ -718,7 +718,7 @@ a	b	b
 3	three	three
 4	four	four
 the join statement is:
-SELECT * FROM t2 natural join t1 order by a 
+SELECT * FROM t2 natural join t1 order by t2.a 
 prepare stmt1 from @query2 ;
 execute stmt1 ;
 a	b
@@ -3574,16 +3574,16 @@ a	?	a
 drop table if exists t2 ;
 create table t2 as select * from t1 ;
 set @query1= 'SELECT * FROM t2 join t1 on (t1.a=t2.a) order by t2.a ' ;
-set @query2= 'SELECT * FROM t2 natural join t1 order by a ' ;
-set @query3= 'SELECT * FROM t2 join t1 using(a) order by a ' ;
+set @query2= 'SELECT * FROM t2 natural join t1 order by t2.a ' ;
+set @query3= 'SELECT * FROM t2 join t1 using(a) order by t2.a ' ;
 set @query4= 'SELECT * FROM t2 left join t1 on(t1.a=t2.a) order by t2.a ' ;
-set @query5= 'SELECT * FROM t2 natural left join t1 order by a ' ;
-set @query6= 'SELECT * FROM t2 left join t1 using(a) order by a ' ;
+set @query5= 'SELECT * FROM t2 natural left join t1 order by t2.a ' ;
+set @query6= 'SELECT * FROM t2 left join t1 using(a) order by t2.a ' ;
 set @query7= 'SELECT * FROM t2 right join t1 on(t1.a=t2.a) order by t2.a ' ;
-set @query8= 'SELECT * FROM t2 natural right join t1 order by a ' ;
-set @query9= 'SELECT * FROM t2 right join t1 using(a) order by a ' ;
+set @query8= 'SELECT * FROM t2 natural right join t1 order by t2.a ' ;
+set @query9= 'SELECT * FROM t2 right join t1 using(a) order by t2.a ' ;
 the join statement is:
-SELECT * FROM t2 right join t1 using(a) order by a 
+SELECT * FROM t2 right join t1 using(a) order by t2.a 
 prepare stmt1 from @query9  ;
 execute stmt1 ;
 a	b	b
@@ -3604,7 +3604,7 @@ a	b	b
 3	three	three
 4	four	four
 the join statement is:
-SELECT * FROM t2 natural right join t1 order by a 
+SELECT * FROM t2 natural right join t1 order by t2.a 
 prepare stmt1 from @query8 ;
 execute stmt1 ;
 a	b
@@ -3646,7 +3646,7 @@ a	b	a	b
 3	three	3	three
 4	four	4	four
 the join statement is:
-SELECT * FROM t2 left join t1 using(a) order by a 
+SELECT * FROM t2 left join t1 using(a) order by t2.a 
 prepare stmt1 from @query6 ;
 execute stmt1 ;
 a	b	b
@@ -3667,7 +3667,7 @@ a	b	b
 3	three	three
 4	four	four
 the join statement is:
-SELECT * FROM t2 natural left join t1 order by a 
+SELECT * FROM t2 natural left join t1 order by t2.a 
 prepare stmt1 from @query5 ;
 execute stmt1 ;
 a	b
@@ -3709,7 +3709,7 @@ a	b	a	b
 3	three	3	three
 4	four	4	four
 the join statement is:
-SELECT * FROM t2 join t1 using(a) order by a 
+SELECT * FROM t2 join t1 using(a) order by t2.a 
 prepare stmt1 from @query3 ;
 execute stmt1 ;
 a	b	b
@@ -3730,7 +3730,7 @@ a	b	b
 3	three	three
 4	four	four
 the join statement is:
-SELECT * FROM t2 natural join t1 order by a 
+SELECT * FROM t2 natural join t1 order by t2.a 
 prepare stmt1 from @query2 ;
 execute stmt1 ;
 a	b

mysql-test/r/ps_6bdb.result

@@ -519,16 +519,16 @@ a	?	a
 drop table if exists t2 ;
 create table t2 as select * from t1 ;
 set @query1= 'SELECT * FROM t2 join t1 on (t1.a=t2.a) order by t2.a ' ;
-set @query2= 'SELECT * FROM t2 natural join t1 order by a ' ;
-set @query3= 'SELECT * FROM t2 join t1 using(a) order by a ' ;
+set @query2= 'SELECT * FROM t2 natural join t1 order by t2.a ' ;
+set @query3= 'SELECT * FROM t2 join t1 using(a) order by t2.a ' ;
 set @query4= 'SELECT * FROM t2 left join t1 on(t1.a=t2.a) order by t2.a ' ;
-set @query5= 'SELECT * FROM t2 natural left join t1 order by a ' ;
-set @query6= 'SELECT * FROM t2 left join t1 using(a) order by a ' ;
+set @query5= 'SELECT * FROM t2 natural left join t1 order by t2.a ' ;
+set @query6= 'SELECT * FROM t2 left join t1 using(a) order by t2.a ' ;
 set @query7= 'SELECT * FROM t2 right join t1 on(t1.a=t2.a) order by t2.a ' ;
-set @query8= 'SELECT * FROM t2 natural right join t1 order by a ' ;
-set @query9= 'SELECT * FROM t2 right join t1 using(a) order by a ' ;
+set @query8= 'SELECT * FROM t2 natural right join t1 order by t2.a ' ;
+set @query9= 'SELECT * FROM t2 right join t1 using(a) order by t2.a ' ;
 the join statement is:
-SELECT * FROM t2 right join t1 using(a) order by a 
+SELECT * FROM t2 right join t1 using(a) order by t2.a 
 prepare stmt1 from @query9  ;
 execute stmt1 ;
 a	b	b
@@ -549,7 +549,7 @@ a	b	b
 3	three	three
 4	four	four
 the join statement is:
-SELECT * FROM t2 natural right join t1 order by a 
+SELECT * FROM t2 natural right join t1 order by t2.a 
 prepare stmt1 from @query8 ;
 execute stmt1 ;
 a	b
@@ -591,7 +591,7 @@ a	b	a	b
 3	three	3	three
 4	four	4	four
 the join statement is:
-SELECT * FROM t2 left join t1 using(a) order by a 
+SELECT * FROM t2 left join t1 using(a) order by t2.a 
 prepare stmt1 from @query6 ;
 execute stmt1 ;
 a	b	b
@@ -612,7 +612,7 @@ a	b	b
 3	three	three
 4	four	four
 the join statement is:
-SELECT * FROM t2 natural left join t1 order by a 
+SELECT * FROM t2 natural left join t1 order by t2.a 
 prepare stmt1 from @query5 ;
 execute stmt1 ;
 a	b
@@ -654,7 +654,7 @@ a	b	a	b
 3	three	3	three
 4	four	4	four
 the join statement is:
-SELECT * FROM t2 join t1 using(a) order by a 
+SELECT * FROM t2 join t1 using(a) order by t2.a 
 prepare stmt1 from @query3 ;
 execute stmt1 ;
 a	b	b
@@ -675,7 +675,7 @@ a	b	b
 3	three	three
 4	four	four
 the join statement is:
-SELECT * FROM t2 natural join t1 order by a 
+SELECT * FROM t2 natural join t1 order by t2.a 
 prepare stmt1 from @query2 ;
 execute stmt1 ;
 a	b

mysql-test/r/ps_7ndb.result

@@ -519,16 +519,16 @@ a	?	a
 drop table if exists t2 ;
 create table t2 as select * from t1 ;
 set @query1= 'SELECT * FROM t2 join t1 on (t1.a=t2.a) order by t2.a ' ;
-set @query2= 'SELECT * FROM t2 natural join t1 order by a ' ;
-set @query3= 'SELECT * FROM t2 join t1 using(a) order by a ' ;
+set @query2= 'SELECT * FROM t2 natural join t1 order by t2.a ' ;
+set @query3= 'SELECT * FROM t2 join t1 using(a) order by t2.a ' ;
 set @query4= 'SELECT * FROM t2 left join t1 on(t1.a=t2.a) order by t2.a ' ;
-set @query5= 'SELECT * FROM t2 natural left join t1 order by a ' ;
-set @query6= 'SELECT * FROM t2 left join t1 using(a) order by a ' ;
+set @query5= 'SELECT * FROM t2 natural left join t1 order by t2.a ' ;
+set @query6= 'SELECT * FROM t2 left join t1 using(a) order by t2.a ' ;
 set @query7= 'SELECT * FROM t2 right join t1 on(t1.a=t2.a) order by t2.a ' ;
-set @query8= 'SELECT * FROM t2 natural right join t1 order by a ' ;
-set @query9= 'SELECT * FROM t2 right join t1 using(a) order by a ' ;
+set @query8= 'SELECT * FROM t2 natural right join t1 order by t2.a ' ;
+set @query9= 'SELECT * FROM t2 right join t1 using(a) order by t2.a ' ;
 the join statement is:
-SELECT * FROM t2 right join t1 using(a) order by a 
+SELECT * FROM t2 right join t1 using(a) order by t2.a 
 prepare stmt1 from @query9  ;
 execute stmt1 ;
 a	b	b
@@ -549,7 +549,7 @@ a	b	b
 3	three	three
 4	four	four
 the join statement is:
-SELECT * FROM t2 natural right join t1 order by a 
+SELECT * FROM t2 natural right join t1 order by t2.a 
 prepare stmt1 from @query8 ;
 execute stmt1 ;
 a	b
@@ -591,7 +591,7 @@ a	b	a	b
 3	three	3	three
 4	four	4	four
 the join statement is:
-SELECT * FROM t2 left join t1 using(a) order by a 
+SELECT * FROM t2 left join t1 using(a) order by t2.a 
 prepare stmt1 from @query6 ;
 execute stmt1 ;
 a	b	b
@@ -612,7 +612,7 @@ a	b	b
 3	three	three
 4	four	four
 the join statement is:
-SELECT * FROM t2 natural left join t1 order by a 
+SELECT * FROM t2 natural left join t1 order by t2.a 
 prepare stmt1 from @query5 ;
 execute stmt1 ;
 a	b
@@ -654,7 +654,7 @@ a	b	a	b
 3	three	3	three
 4	four	4	four
 the join statement is:
-SELECT * FROM t2 join t1 using(a) order by a 
+SELECT * FROM t2 join t1 using(a) order by t2.a 
 prepare stmt1 from @query3 ;
 execute stmt1 ;
 a	b	b
@@ -675,7 +675,7 @@ a	b	b
 3	three	three
 4	four	four
 the join statement is:
-SELECT * FROM t2 natural join t1 order by a 
+SELECT * FROM t2 natural join t1 order by t2.a 
 prepare stmt1 from @query2 ;
 execute stmt1 ;
 a	b

mysql-test/r/select.result

@@ -1350,6 +1350,20 @@ fld1	fld1
 250504	250505
 250505	250505
 insert into t2 (fld1, companynr) values (999999,99);
+select t2.companynr,companyname from t2 left join t4 using (companynr) where t4.companynr is null;
+companynr	companyname
+99	NULL
+select count(*) from t2 left join t4 using (companynr) where t4.companynr is not null;
+count(*)
+1199
+explain select t2.companynr,companyname from t2 left join t4 using (companynr) where t4.companynr is null;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t2	ALL	NULL	NULL	NULL	NULL	1200	
+1	SIMPLE	t4	eq_ref	PRIMARY	PRIMARY	1	test.t2.companynr	1	Using where; Not exists
+explain select t2.companynr,companyname from t4 left join t2 using (companynr) where t2.companynr is null;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t4	ALL	NULL	NULL	NULL	NULL	12	
+1	SIMPLE	t2	ALL	NULL	NULL	NULL	NULL	1200	Using where; Not exists
 select companynr,companyname from t2 left join t4 using (companynr) where companynr is null;
 companynr	companyname
 select count(*) from t2 left join t4 using (companynr) where companynr is not null;
@@ -1362,6 +1376,18 @@ explain select companynr,companyname from t4 left join t2 using (companynr) wher
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	SIMPLE	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Impossible WHERE
 delete from t2 where fld1=999999;
+explain select t2.companynr,companyname from t4 left join t2 using (companynr) where t2.companynr > 0;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t2	ALL	NULL	NULL	NULL	NULL	1199	Using where
+1	SIMPLE	t4	eq_ref	PRIMARY	PRIMARY	1	test.t2.companynr	1	
+explain select t2.companynr,companyname from t4 left join t2 using (companynr) where t2.companynr > 0 or t2.companynr < 0;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t2	ALL	NULL	NULL	NULL	NULL	1199	Using where
+1	SIMPLE	t4	eq_ref	PRIMARY	PRIMARY	1	test.t2.companynr	1	
+explain select t2.companynr,companyname from t4 left join t2 using (companynr) where t2.companynr > 0 and t4.companynr > 0;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t2	ALL	NULL	NULL	NULL	NULL	1199	Using where
+1	SIMPLE	t4	eq_ref	PRIMARY	PRIMARY	1	test.t2.companynr	1	
 explain select companynr,companyname from t4 left join t2 using (companynr) where companynr > 0;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	SIMPLE	t4	ALL	PRIMARY	NULL	NULL	NULL	12	Using where
@@ -1374,6 +1400,18 @@ explain select companynr,companyname from t4 left join t2 using (companynr) wher
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	SIMPLE	t4	ALL	PRIMARY	NULL	NULL	NULL	12	Using where
 1	SIMPLE	t2	ALL	NULL	NULL	NULL	NULL	1199	
+explain select t2.companynr,companyname from t4 left join t2 using (companynr) where t2.companynr > 0 or t2.companynr is null;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t4	ALL	NULL	NULL	NULL	NULL	12	
+1	SIMPLE	t2	ALL	NULL	NULL	NULL	NULL	1199	Using where
+explain select t2.companynr,companyname from t4 left join t2 using (companynr) where t2.companynr > 0 or t2.companynr < 0 or t4.companynr > 0;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t4	ALL	PRIMARY	NULL	NULL	NULL	12	
+1	SIMPLE	t2	ALL	NULL	NULL	NULL	NULL	1199	Using where
+explain select t2.companynr,companyname from t4 left join t2 using (companynr) where ifnull(t2.companynr,1)>0;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t4	ALL	NULL	NULL	NULL	NULL	12	
+1	SIMPLE	t2	ALL	NULL	NULL	NULL	NULL	1199	Using where
 explain select companynr,companyname from t4 left join t2 using (companynr) where companynr > 0 or companynr is null;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	SIMPLE	t4	ALL	PRIMARY	NULL	NULL	NULL	12	Using where

mysql-test/r/subselect.result

@@ -1789,10 +1789,18 @@ CREATE TABLE t1 (id INT);
 CREATE TABLE t2 (id INT);
 INSERT INTO t1 VALUES (1), (2);
 INSERT INTO t2 VALUES (1);
+SELECT t1.id, ( SELECT COUNT(t.id) FROM t2 AS t WHERE t.id = t1.id ) AS c FROM t1 LEFT JOIN t2 USING (id);
+id	c
+1	1
+2	0
 SELECT id, ( SELECT COUNT(t.id) FROM t2 AS t WHERE t.id = t1.id ) AS c FROM t1 LEFT JOIN t2 USING (id);
 id	c
 1	1
 2	0
+SELECT t1.id, ( SELECT COUNT(t.id) FROM t2 AS t WHERE t.id = t1.id ) AS c FROM t1 LEFT JOIN t2 USING (id) ORDER BY t1.id;
+id	c
+1	1
+2	0
 SELECT id, ( SELECT COUNT(t.id) FROM t2 AS t WHERE t.id = t1.id ) AS c FROM t1 LEFT JOIN t2 USING (id) ORDER BY id;
 id	c
 1	1

mysql-test/r/type_ranges.result

@@ -307,17 +307,33 @@ create table t1 ( id integer unsigned not null primary key );
 create table t2 ( id integer unsigned not null primary key );
 insert into t1 values (1), (2);
 insert into t2 values (1);
+select  t1.id as id_A,  t2.id as id_B from t1 left join t2 using ( id );
+id_A	id_B
+1	1
+2	NULL
 select  t1.id as id_A,  t2.id as id_B from t1 left join t2 on (t1.id = t2.id);
 id_A	id_B
 1	1
 2	NULL
 create table t3 (id_A integer unsigned not null, id_B integer unsigned null  );
+insert into t3 select t1.id as id_A,  t2.id as id_B from t1 left join t2 using ( id );
+select * from t3;
+id_A	id_B
+1	1
+2	NULL
+delete from t3;
 insert into t3 select t1.id as id_A,  t2.id as id_B from t1 left join t2 on (t1.id = t2.id);
 select * from t3;
 id_A	id_B
 1	1
 2	NULL
 drop table t3;
+create table t3 select t1.id as id_A,  t2.id as id_B from t1 left join t2 using ( id );
+select * from t3;
+id_A	id_B
+1	1
+2	NULL
+drop table t3;
 create table t3 select t1.id as id_A,  t2.id as id_B from t1 left join t2 on (t1.id = t2.id);
 select * from t3;
 id_A	id_B

mysql-test/t/bdb.test

@@ -400,6 +400,7 @@ drop table t1;
 set @a:=now();
 CREATE TABLE t1 (a int not null, b timestamp not null, primary key (a)) engine=bdb;
 insert into t1 (a) values(1),(2),(3);
+select t1.a from t1 natural join t1 as t2 where t1.b >= @a order by t1.a;
 select a from t1 natural join t1 as t2 where b >= @a order by a;
 update t1 set a=5 where a=1;
 select a from t1;
@@ -571,7 +572,7 @@ create temporary table tmp1
         select branch_id, target_id, platform_id, product_id
         from t1, t2, t3, t4 ;
 create temporary table tmp2 
-        select branch_id, target_id, platform_id, product_id 
+        select tmp1.branch_id, tmp1.target_id, tmp1.platform_id, tmp1.product_id 
         from tmp1 left join t8 
         using (branch_id,target_id,platform_id,product_id) 
         where t8.archive_id is null ;

mysql-test/t/innodb.test

@@ -440,6 +440,7 @@ drop table t1;
 set @a:=now();
 CREATE TABLE t1 (a int not null, b timestamp not null, primary key (a)) engine=innodb;
 insert into t1 (a) values(1),(2),(3);
+select t1.a from t1 natural join t1 as t2 where t1.b >= @a order by t1.a;
 select a from t1 natural join t1 as t2 where b >= @a order by a;
 update t1 set a=5 where a=1;
 select a from t1;

mysql-test/t/join.test

@@ -111,6 +111,10 @@ drop table t1, t2;
 
 create table t1 (a int primary key);
 insert into t1 values(1),(2);
+select t1.a from t1 as t1 left join t1 as t2 using (a) left join t1 as t3 using (a) left join t1 as t4 using (a) left join t1 as t5 using (a) left join t1 as t6 using (a) left join t1 as t7 using (a) left join t1 as t8 using (a) left join t1 as t9 using (a) left join t1 as t10 using (a) left join t1 as t11 using (a) left join t1 as t12 using (a) left join t1 as t13 using (a) left join t1 as t14 using (a) left join t1 as t15 using (a) left join t1 as t16 using (a) left join t1 as t17 using (a) left join t1 as t18 using (a) left join t1 as t19 using (a) left join t1 as t20 using (a) left join t1 as t21 using (a) left join t1 as t22 using (a) left join t1 as t23 using (a) left join t1 as t24 using (a) left join t1 as t25 using (a) left join t1 as t26 using (a) left join t1 as t27 using (a) left join t1 as t28 using (a) left join t1 as t29 using (a) left join t1 as t30 using (a) left join t1 as t31 using (a);
+--replace_result "31 tables" "XX tables" "61 tables" "XX tables"
+--error 1116
+select t1.a from t1 as t1 left join t1 as t2 using (a) left join t1 as t3 using (a) left join t1 as t4 using (a) left join t1 as t5 using (a) left join t1 as t6 using (a) left join t1 as t7 using (a) left join t1 as t8 using (a) left join t1 as t9 using (a) left join t1 as t10 using (a) left join t1 as t11 using (a) left join t1 as t12 using (a) left join t1 as t13 using (a) left join t1 as t14 using (a) left join t1 as t15 using (a) left join t1 as t16 using (a) left join t1 as t17 using (a) left join t1 as t18 using (a) left join t1 as t19 using (a) left join t1 as t20 using (a) left join t1 as t21 using (a) left join t1 as t22 using (a) left join t1 as t23 using (a) left join t1 as t24 using (a) left join t1 as t25 using (a) left join t1 as t26 using (a) left join t1 as t27 using (a) left join t1 as t28 using (a) left join t1 as t29 using (a) left join t1 as t30 using (a) left join t1 as t31 using (a) left join t1 as t32 using (a) left join t1 as t33 using (a) left join t1 as t34 using (a) left join t1 as t35 using (a) left join t1 as t36 using (a) left join t1 as t37 using (a) left join t1 as t38 using (a) left join t1 as t39 using (a) left join t1 as t40 using (a) left join t1 as t41 using (a) left join t1 as t42 using (a) left join t1 as t43 using (a) left join t1 as t44 using (a) left join t1 as t45 using (a) left join t1 as t46 using (a) left join t1 as t47 using (a) left join t1 as t48 using (a) left join t1 as t49 using (a) left join t1 as t50 using (a) left join t1 as t51 using (a) left join t1 as t52 using (a) left join t1 as t53 using (a) left join t1 as t54 using (a) left join t1 as t55 using (a) left join t1 as t56 using (a) left join t1 as t57 using (a) left join t1 as t58 using (a) left join t1 as t59 using (a) left join t1 as t60 using (a) left join t1 as t61 using (a) left join t1 as t62 using (a) left join t1 as t63 using (a) left join t1 as t64 using (a) left join t1 as t65 using (a);
 select a from t1 as t1 left join t1 as t2 using (a) left join t1 as t3 using (a) left join t1 as t4 using (a) left join t1 as t5 using (a) left join t1 as t6 using (a) left join t1 as t7 using (a) left join t1 as t8 using (a) left join t1 as t9 using (a) left join t1 as t10 using (a) left join t1 as t11 using (a) left join t1 as t12 using (a) left join t1 as t13 using (a) left join t1 as t14 using (a) left join t1 as t15 using (a) left join t1 as t16 using (a) left join t1 as t17 using (a) left join t1 as t18 using (a) left join t1 as t19 using (a) left join t1 as t20 using (a) left join t1 as t21 using (a) left join t1 as t22 using (a) left join t1 as t23 using (a) left join t1 as t24 using (a) left join t1 as t25 using (a) left join t1 as t26 using (a) left join t1 as t27 using (a) left join t1 as t28 using (a) left join t1 as t29 using (a) left join t1 as t30 using (a) left join t1 as t31 using (a);
 --replace_result "31 tables" "XX tables" "61 tables" "XX tables"
 --error 1116
@@ -144,6 +148,7 @@ DROP TABLE t1, t2;
 CREATE TABLE t1 (d DATE NOT NULL);
 CREATE TABLE t2 (d DATE NOT NULL);
 INSERT INTO t1 (d) VALUES ('2001-08-01'),('0000-00-00');
+SELECT * FROM t1 LEFT JOIN t2 USING (d) WHERE t2.d IS NULL;
 SELECT * FROM t1 LEFT JOIN t2 USING (d) WHERE d IS NULL;
 SELECT * from t1 WHERE t1.d IS NULL;
 SELECT * FROM t1 WHERE 1/0 IS NULL;
@@ -266,6 +271,8 @@ CREATE TABLE t2 (
   FULLTEXT KEY rate_code (rate_code)
 ) ENGINE=MyISAM;
 INSERT INTO t2 VALUES ('rivercats','cust',20);
+SELECT emp.rate_code, lr.base_rate FROM t1 AS emp LEFT JOIN t2 AS lr USING (siteid, rate_code) WHERE emp.emp_id = 'psmith' AND lr.siteid = 'rivercats';
+SELECT emp.rate_code, lr.base_rate FROM t1 AS emp LEFT JOIN t2 AS lr USING (siteid, rate_code) WHERE lr.siteid = 'rivercats' AND emp.emp_id = 'psmith';
 SELECT rate_code, lr.base_rate FROM t1 AS emp LEFT JOIN t2 AS lr USING (siteid, rate_code) WHERE emp.emp_id = 'psmith' AND siteid = 'rivercats';
 SELECT rate_code, lr.base_rate FROM t1 AS emp LEFT JOIN t2 AS lr USING (siteid, rate_code) WHERE siteid = 'rivercats' AND emp.emp_id = 'psmith';
 drop table t1,t2;
@@ -315,14 +322,14 @@ select * from t3 right join t2 on (t3.i=t2.i);
 select * from t3 natural right join t2 natural right join t1;
 select * from t3 right join t2 on (t3.i=t2.i) right join t1 on (t2.i=t1.i);
 
-select * from t1,t2 natural left join t3 order by 1,2;
+select * from t1,t2 natural left join t3 order by t1.i,t2.i,t3.i;
 select * from t1,t2 left join t3 on (t2.i=t3.i) order by t1.i,t2.i,t3.i;
-select * from t2 natural left join t3,t1 order by t1.i;
+select t1.i,t2.i,t3.i from t2 natural left join t3,t1 order by t1.i,t2.i,t3.i;
 select t1.i,t2.i,t3.i from t2 left join t3 on (t2.i=t3.i),t1 order by t1.i,t2.i,t3.i;
 
-select * from t1,t2 natural right join t3 order by 1,2;
+select * from t1,t2 natural right join t3 order by t1.i,t2.i,t3.i;
 select * from t1,t2 right join t3 on (t2.i=t3.i) order by t1.i,t2.i,t3.i;
-select * from t2 natural right join t3,t1 order by t1.i;
+select t1.i,t2.i,t3.i from t2 natural right join t3,t1 order by t1.i,t2.i,t3.i;
 select t1.i,t2.i,t3.i from t2 right join t3 on (t2.i=t3.i),t1 order by t1.i,t2.i,t3.i;
 drop table t1,t2,t3;
 

mysql-test/t/join_nested.test

@@ -678,7 +678,7 @@ SELECT t2.a,t2.b,t3.a1,t3.b
   FROM t2 LEFT JOIN t3 ON t2.b=t3.b
     WHERE t2.a = 4 OR (t2.a > 4 AND t3.a1 IS NULL);
 
-SELECT *
+SELECT t2.a,t2.b,t3.a1,t3.b
   FROM t2 NATURAL LEFT JOIN t3
     WHERE t2.a = 4 OR (t2.a > 4 AND t3.a1 IS NULL);
 

mysql-test/t/join_outer.test

@@ -19,11 +19,11 @@ select t1.*,t2.* from t1 JOIN t2 where t1.a=t2.a;
 select t1.*,t2.* from t1 left join t2 on (t1.a=t2.a) order by t1.grp,t1.a,t2.c;
 select t1.*,t2.* from { oj t2 left outer join t1 on (t1.a=t2.a) };
 select t1.*,t2.* from t1 as t0,{ oj t2 left outer join t1 on (t1.a=t2.a) } WHERE t0.a=2;
-select * from t1 left join t2 using (a);
-select t1.*,t2.* from t1 left join t2 on t1.a=t2.a;
-select * from t1 left join t2 using (a,c);
-select * from t1 left join t2 using (c);
-select * from t1 natural left outer join t2;
+select t1.*,t2.* from t1 left join t2 using (a);
+select t1.*,t2.* from t1 left join t2 using (a) where t1.a=t2.a;
+select t1.*,t2.* from t1 left join t2 using (a,c);
+select t1.*,t2.* from t1 left join t2 using (c);
+select t1.*,t2.* from t1 natural left outer join t2;
 
 select t1.*,t2.* from t1 left join t2 on (t1.a=t2.a) where t2.id=3;
 select t1.*,t2.* from t1 left join t2 on (t1.a=t2.a) where t2.id is null;
@@ -44,9 +44,9 @@ select t1.*,t2.*,t3.a from t1 left join t2 on (t3.a=t2.a) left join t1 as t3 on
 select t1.*,t2.*,t3.a from t1 left join t2 on (t3.a=t2.a) left join t1 as t3 on (t2.a=t3.a);
 
 # Test of inner join
-select * from t1 inner join t2 using (a);
+select t1.*,t2.* from t1 inner join t2 using (a);
 select t1.*,t2.* from t1 inner join t2 on (t1.a=t2.a);
-select * from t1 natural join t2;
+select t1.*,t2.* from t1 natural join t2;
 
 drop table t1,t2;
 
@@ -325,7 +325,7 @@ INSERT INTO t2 VALUES (2,'y');
 INSERT INTO t2 VALUES (3,'z');
 
 SELECT t2.id2 FROM t2 LEFT OUTER JOIN t1 ON t1.id2 = t2.id2 WHERE id1 IS NULL;
-SELECT id2 FROM t2 NATURAL LEFT OUTER JOIN t1 WHERE id1 IS NULL;
+SELECT t2.id2 FROM t2 NATURAL LEFT OUTER JOIN t1 WHERE id1 IS NULL;
 
 drop table t1,t2;
 
@@ -430,6 +430,8 @@ insert into t1 values(1),(2);
 insert into t2 values(2),(3);
 insert into t3 values(2),(4);
 select * from t1 natural left join t2 natural left join t3;
+select * from t1 natural left join t2 where (t2.i is not null)=0;
+select * from t1 natural left join t2 where (t2.i is not null) is not null;
 select * from t1 natural left join t2 where (i is not null)=0;
 select * from t1 natural left join t2 where (i is not null) is not null;
 drop table t1,t2,t3;
@@ -656,6 +658,8 @@ create table t1 (a int, b varchar(20));
 create table t2 (a int, c varchar(20));
 insert into t1 values (1,"aaaaaaaaaa"),(2,"bbbbbbbbbb");
 insert into t2 values (1,"cccccccccc"),(2,"dddddddddd");
+select group_concat(t1.b,t2.c) from t1 left join t2 using(a) group by t1.a;
+select group_concat(t1.b,t2.c) from t1 inner join t2 using(a) group by t1.a;
 select group_concat(t1.b,t2.c) from t1 left join t2 using(a) group by a;
 select group_concat(t1.b,t2.c) from t1 inner join t2 using(a) group by a;
 drop table t1, t2;

mysql-test/t/null_key.test

@@ -152,18 +152,12 @@ INSERT INTO t1 (order_id, product_id, product_type) VALUES
 INSERT INTO t2 (order_id, product_id, product_type) VALUES
 ('9d9aad7764b5b2c53004348ef8d34500',2315652, 3);
 
-select t1.* from t1 left join t2
-       on (t1.order_id = t2.order_id and
-           t1.product_id = t2.product_id and
-           t1.product_type = t2.product_type)
-where t2.order_id = NULL;
-
-select t1.* from t1 left join t2
-       on (t1.order_id = t2.order_id and
-           t1.product_id = t2.product_id and
-           t1.product_type = t2.product_type)
+select t1.* from t1
+left join t2 using(order_id, product_id, product_type)
+where t2.order_id=NULL;
+select t1.* from t1
+left join t2 using(order_id, product_id, product_type)
 where t2.order_id is NULL;
-
 drop table t1,t2;
 
 #

mysql-test/t/order_by.test

@@ -151,11 +151,22 @@ INSERT INTO t2 VALUES (2,25);
 INSERT INTO t3 VALUES (1,'123 Park Place');
 INSERT INTO t3 VALUES (2,'453 Boardwalk');
 
+SELECT    a,b,if(b = 1,i,if(b = 2,v,''))
+FROM      t1
+LEFT JOIN t2 USING(c)
+LEFT JOIN t3 ON t3.c = t1.c;
+
 SELECT    a,b,if(b = 1,i,if(b = 2,v,''))
 FROM      t1
 LEFT JOIN t2 ON t1.c = t2.c
 LEFT JOIN t3 ON t3.c = t1.c;
 
+SELECT    a,b,if(b = 1,i,if(b = 2,v,''))
+FROM      t1
+LEFT JOIN t2 USING(c)
+LEFT JOIN t3 ON t3.c = t1.c
+ORDER BY a;
+
 SELECT    a,b,if(b = 1,i,if(b = 2,v,''))
 FROM      t1
 LEFT JOIN t2 ON t1.c = t2.c
@@ -339,7 +350,9 @@ CREATE TABLE t2 (
 
 INSERT INTO t1 (titre,auteur,dest) VALUES ('test','joce','bug');
 INSERT INTO t2 (numeropost,pseudo) VALUES (1,'joce'),(1,'bug');
+SELECT titre,t1.numeropost,auteur,icone,nbrep,0,date,vue,ouvert,lastauteur,dest FROM t2 LEFT JOIN t1 USING(numeropost) WHERE t2.pseudo='joce' ORDER BY date DESC LIMIT 0,30;
 SELECT titre,numeropost,auteur,icone,nbrep,0,date,vue,ouvert,lastauteur,dest FROM t2 LEFT JOIN t1 USING(numeropost) WHERE t2.pseudo='joce' ORDER BY date DESC LIMIT 0,30;
+SELECT titre,t1.numeropost,auteur,icone,nbrep,'0',date,vue,ouvert,lastauteur,dest FROM t2 LEFT JOIN t1 USING(numeropost) WHERE t2.pseudo='joce' ORDER BY date DESC LIMIT 0,30;
 SELECT titre,numeropost,auteur,icone,nbrep,'0',date,vue,ouvert,lastauteur,dest FROM t2 LEFT JOIN t1 USING(numeropost) WHERE t2.pseudo='joce' ORDER BY date DESC LIMIT 0,30;
 drop table t1,t2;
 

mysql-test/t/select.test

@@ -1538,6 +1538,11 @@ select t2.fld1,t22.fld1 from t2,t2 t22 where t2.fld1 >= 250501 and t2.fld1 <= 25
 #
 insert into t2 (fld1, companynr) values (999999,99);
 
+select t2.companynr,companyname from t2 left join t4 using (companynr) where t4.companynr is null;
+select count(*) from t2 left join t4 using (companynr) where t4.companynr is not null;
+explain select t2.companynr,companyname from t2 left join t4 using (companynr) where t4.companynr is null;
+explain select t2.companynr,companyname from t4 left join t2 using (companynr) where t2.companynr is null;
+
 select companynr,companyname from t2 left join t4 using (companynr) where companynr is null;
 select count(*) from t2 left join t4 using (companynr) where companynr is not null;
 explain select companynr,companyname from t2 left join t4 using (companynr) where companynr is null;
@@ -1547,10 +1552,18 @@ delete from t2 where fld1=999999;
 #
 # Test left join optimization
 
+explain select t2.companynr,companyname from t4 left join t2 using (companynr) where t2.companynr > 0;
+explain select t2.companynr,companyname from t4 left join t2 using (companynr) where t2.companynr > 0 or t2.companynr < 0;
+explain select t2.companynr,companyname from t4 left join t2 using (companynr) where t2.companynr > 0 and t4.companynr > 0;
+
 explain select companynr,companyname from t4 left join t2 using (companynr) where companynr > 0;
 explain select companynr,companyname from t4 left join t2 using (companynr) where companynr > 0 or companynr < 0;
 explain select companynr,companyname from t4 left join t2 using (companynr) where companynr > 0 and companynr > 0;
 # Following can't be optimized
+explain select t2.companynr,companyname from t4 left join t2 using (companynr) where t2.companynr > 0 or t2.companynr is null;
+explain select t2.companynr,companyname from t4 left join t2 using (companynr) where t2.companynr > 0 or t2.companynr < 0 or t4.companynr > 0;
+explain select t2.companynr,companyname from t4 left join t2 using (companynr) where ifnull(t2.companynr,1)>0;
+
 explain select companynr,companyname from t4 left join t2 using (companynr) where companynr > 0 or companynr is null;
 explain select companynr,companyname from t4 left join t2 using (companynr) where companynr > 0 or companynr < 0 or companynr > 0;
 explain select companynr,companyname from t4 left join t2 using (companynr) where ifnull(companynr,1)>0;

mysql-test/t/subselect.test

@@ -1132,7 +1132,9 @@ CREATE TABLE t1 (id INT);
 CREATE TABLE t2 (id INT);
 INSERT INTO t1 VALUES (1), (2);
 INSERT INTO t2 VALUES (1);
+SELECT t1.id, ( SELECT COUNT(t.id) FROM t2 AS t WHERE t.id = t1.id ) AS c FROM t1 LEFT JOIN t2 USING (id);
 SELECT id, ( SELECT COUNT(t.id) FROM t2 AS t WHERE t.id = t1.id ) AS c FROM t1 LEFT JOIN t2 USING (id);
+SELECT t1.id, ( SELECT COUNT(t.id) FROM t2 AS t WHERE t.id = t1.id ) AS c FROM t1 LEFT JOIN t2 USING (id) ORDER BY t1.id;
 SELECT id, ( SELECT COUNT(t.id) FROM t2 AS t WHERE t.id = t1.id ) AS c FROM t1 LEFT JOIN t2 USING (id) ORDER BY id;
 DROP TABLE t1,t2;
 

mysql-test/t/type_ranges.test

@@ -157,11 +157,18 @@ create table t1 ( id integer unsigned not null primary key );
 create table t2 ( id integer unsigned not null primary key );
 insert into t1 values (1), (2);
 insert into t2 values (1);
+select  t1.id as id_A,  t2.id as id_B from t1 left join t2 using ( id ); 
 select  t1.id as id_A,  t2.id as id_B from t1 left join t2 on (t1.id = t2.id); 
 create table t3 (id_A integer unsigned not null, id_B integer unsigned null  );
+insert into t3 select t1.id as id_A,  t2.id as id_B from t1 left join t2 using ( id );
+select * from t3;
+delete from t3;
 insert into t3 select t1.id as id_A,  t2.id as id_B from t1 left join t2 on (t1.id = t2.id);
 select * from t3;
 drop table t3;
+create table t3 select t1.id as id_A,  t2.id as id_B from t1 left join t2 using ( id );
+select * from t3;
+drop table t3;
 create table t3 select t1.id as id_A,  t2.id as id_B from t1 left join t2 on (t1.id = t2.id);
 select * from t3;
 drop table t1,t2,t3;

sql/sql_base.cc

@@ -2587,8 +2587,6 @@ find_field_in_view(THD *thd, TABLE_LIST *table_list,
     thd			 [in]  thread handler
     table_ref            [in]  table reference to search
     name		 [in]  name of field
-    table_name           [in]  optional table name that qualifies the field
-    db_name              [in]  optional database name that qualifies the field
     length		 [in]  length of name
     ref                  [in/out] if 'name' is resolved to a view field, ref is
                                set to point to the found view field
@@ -2599,6 +2597,12 @@ find_field_in_view(THD *thd, TABLE_LIST *table_list,
                                belongs - differs from 'table_list' only for
                                NATURAL/USING joins
 
+  DESCRIPTION
+    Search for a field among the result fields of a NATURAL/USING join.
+    Notice that this procedure is called only for non-qualified field
+    names. In the case of qualified fields, we search directly the base
+    tables of a natural join.
+
   RETURN
     NULL        if the field was not found
     WRONG_GRANT if no access rights to the found field
@@ -2607,7 +2611,6 @@ find_field_in_view(THD *thd, TABLE_LIST *table_list,
 
 static Field *
 find_field_in_natural_join(THD *thd, TABLE_LIST *table_ref, const char *name,
-                           const char *table_name, const char *db_name,
                            uint length, Item **ref, bool check_grants,
                            bool register_tree_change,
                            TABLE_LIST **actual_table)
@@ -2629,27 +2632,6 @@ find_field_in_natural_join(THD *thd, TABLE_LIST *table_ref, const char *name,
     if (!(nj_col= field_it++))
       DBUG_RETURN(NULL);
 
-    if (table_name)
-    {
-      /*
-        Coalesced columns cannot be qualified unless this is the execute phase
-        of prepared statements. The reason is that they do not belong to any
-        table, but for PS the prepare phase already resolves and stores
-        items, so during the execution phase we resolve fully qualified items.
-      */
-      if (!thd->current_arena->is_stmt_execute() && nj_col->is_coalesced)
-        continue;
-      if (table_name[0] &&
-          my_strcasecmp(table_alias_charset, nj_col->table_name(), table_name))
-        continue;
-      if (db_name && db_name[0])
-      {
-        const char *cur_db_name= nj_col->db_name();
-        if (cur_db_name && strcmp(db_name, cur_db_name))
-          continue;
-      }
-    }
-
     if (!my_strcasecmp(system_charset_info, nj_col->name(), name))
       break;
   }
@@ -2842,11 +2824,35 @@ find_field_in_table_ref(THD *thd, TABLE_LIST *table_list,
       *actual_table= table_list;
   }
   else if (table_list->is_natural_join)
-    fld= find_field_in_natural_join(thd, table_list, name, table_name,
-                                    db_name,  length, ref,
+  {
+    if (table_name && table_name[0])
+    {
+      /*
+        Qualified field; Search for it in the tables used by the natural join.
+      */
+      List_iterator<TABLE_LIST> it(table_list->nested_join->join_list);
+      TABLE_LIST *table;
+      while ((table= it++))
+      {
+        if ((fld= find_field_in_table_ref(thd, table, name, item_name,
+                                          table_name, db_name, length, ref,
+                                          check_grants_table,
+                                          check_grants_view,
+                                          allow_rowid, cached_field_index_ptr,
+                                          register_tree_change, actual_table)))
+          DBUG_RETURN(fld);
+      }
+      DBUG_RETURN(0);
+    }
+    /*
+      Non-qualified field, search directly in the result columns of the
+      natural join.
+    */
+    fld= find_field_in_natural_join(thd, table_list, name, length, ref,
                                     /* TIMOUR_TODO: check this with Sanja */
                                     check_grants_table || check_grants_view,
                                     register_tree_change, actual_table);
+  }
   else
   {
     if ((fld= find_field_in_table(thd, table_list->table, name, length,
@@ -2915,9 +2921,11 @@ find_field_in_tables(THD *thd, Item_ident *item,
   const char *name= item->field_name;
   uint length=(uint) strlen(name);
   char name_buff[NAME_LEN+1];
-  bool allow_rowid;
   TABLE_LIST *cur_table= first_table;
   TABLE_LIST *actual_table;
+  bool is_qualified= table_name && table_name[0];
+  bool allow_rowid= is_qualified ?
+                    TRUE : (cur_table && !cur_table->next_local);
 
   if (item->cached_table)
   {
@@ -2988,81 +2996,13 @@ find_field_in_tables(THD *thd, Item_ident *item,
   if (last_table)
     last_table= last_table->next_name_resolution_table;
 
-  /* The field we search for is qualified with a table name and optional db. */
-  if (table_name && table_name[0])
-  {
-    for (; cur_table != last_table ;
-         cur_table= cur_table->next_name_resolution_table)
-    {
-      Field *cur_field= find_field_in_table_ref(thd, cur_table, name,
-                                                item->name, table_name,
-                                                db, length, ref,
-                                                (cur_table->table &&
-                                                 test(cur_table->table->grant.
-                                                      want_privilege) &&
-                                                 check_privileges),
-                                                (test(cur_table->grant.
-                                                      want_privilege) &&
-                                                 check_privileges),
-                                                1, &(item->cached_field_index),
-                                                register_tree_change,
-                                                &actual_table);
-      if (cur_field)
-      {
-        /*
-          Store the original table of the field, which may be different from
-          cur_table in the case of NATURAL/USING join.
-        */
-        item->cached_table= (!actual_table->cacheable_table) ? 0 : actual_table;
-
-        if (cur_field == WRONG_GRANT)
-          return (Field*) 0;
-        if (db || !thd->where)
-          return cur_field;
-        if (found)
-        {
-          if (report_error == REPORT_ALL_ERRORS ||
-              report_error == IGNORE_EXCEPT_NON_UNIQUE)
-            my_error(ER_NON_UNIQ_ERROR, MYF(0),
-                     item->full_name(),thd->where);
-          return (Field*) 0;
-        }
-        found= cur_field;
-      }
-    }
-    if (found)
-      return found;
-    /*
-      If there were no tables to search, we wouldn't go through the loop and
-      cur_table wouldn't be updated by the loop increment part.
-    */
-    if (cur_table == first_table && (report_error == REPORT_ALL_ERRORS ||
-                                     report_error == REPORT_EXCEPT_NON_UNIQUE))
-    {
-      char buff[NAME_LEN*2+1];
-      if (db && db[0])
-      {
-	strxnmov(buff,sizeof(buff)-1,db,".",table_name,NullS);
-	table_name=buff;
-      }
-      my_error(ER_UNKNOWN_TABLE, MYF(0), table_name, thd->where);
-    }
-    else
-      if (report_error == REPORT_ALL_ERRORS ||
-          report_error == REPORT_EXCEPT_NON_UNIQUE)
-	my_error(ER_BAD_FIELD_ERROR, MYF(0), item->full_name(),thd->where);
-      else
-	return (Field*) not_found_field;
-    return (Field*) 0;
-  }
-
-  /* The field we search for is not qualified. */
-  allow_rowid= cur_table && !cur_table->next_local;
   for (; cur_table != last_table ;
        cur_table= cur_table->next_name_resolution_table)
   {
     Field *cur_field= find_field_in_table_ref(thd, cur_table, name, item->name,
-                                              NULL, NULL, length, ref,
+                                              is_qualified ? table_name : NULL,
+                                              is_qualified ? db : NULL,
+                                              length, ref,
                                               (cur_table->table &&
                                                test(cur_table->table->grant.
                                                     want_privilege) &&
@@ -3086,26 +3026,57 @@ find_field_in_tables(THD *thd, Item_ident *item,
       item->cached_table= (!actual_table->cacheable_table || found) ?
                           0 : actual_table;
 
+      DBUG_ASSERT(thd->where);
+      /*
+        If we found a fully qualified field we return it directly as it can't
+        have duplicates.
+       */
+      if (is_qualified && db)
+        return cur_field;
+
       if (found)
       {
-	if (!thd->where)			// Returns first found
-	  break;
         if (report_error == REPORT_ALL_ERRORS ||
             report_error == IGNORE_EXCEPT_NON_UNIQUE)
-          my_error(ER_NON_UNIQ_ERROR, MYF(0), name, thd->where);
+          my_error(ER_NON_UNIQ_ERROR, MYF(0),
+                   is_qualified ? item->full_name() : name, thd->where);
 	return (Field*) 0;
       }
       found= cur_field;
     }
   }
+
   if (found)
     return found;
-  if (report_error == REPORT_ALL_ERRORS ||
-      report_error == REPORT_EXCEPT_NON_UNIQUE)
-    my_error(ER_BAD_FIELD_ERROR, MYF(0), item->full_name(), thd->where);
+
+  /*
+    If the field was qualified and there were no tables to search, issue
+    an error that an unknown table was given. The situation is detected
+    as follows: if there were no tables we wouldn't go through the loop
+    and cur_table wouldn't be updated by the loop increment part, so it
+    will be equal to the first table.
+  */
+  if (is_qualified && (cur_table == first_table) &&
+      (report_error == REPORT_ALL_ERRORS ||
+       report_error == REPORT_EXCEPT_NON_UNIQUE))
+  {
+    char buff[NAME_LEN*2+1];
+    if (db && db[0])
+    {
+      strxnmov(buff,sizeof(buff)-1,db,".",table_name,NullS);
+      table_name=buff;
+    }
+    my_error(ER_UNKNOWN_TABLE, MYF(0), table_name, thd->where);
+  }
   else
-    return (Field*) not_found_field;
-  return (Field*) 0;
+    if (report_error == REPORT_ALL_ERRORS ||
+        report_error == REPORT_EXCEPT_NON_UNIQUE)
+      my_error(ER_BAD_FIELD_ERROR, MYF(0), item->full_name(), thd->where);
+    else
+      found= not_found_field;
+
+  DBUG_ASSERT(!found || found == not_found_field);
+  return found;
 }
 
 
@@ -3510,10 +3481,6 @@ mark_common_columns(THD *thd, TABLE_LIST *table_ref_1, TABLE_LIST *table_ref_2,
       Item_ident *item_ident_1, *item_ident_2;
       Item_func_eq *eq_cond;
 
-      DBUG_PRINT("info", ("new equi-join condition:  %s.%s = %s.%s",
-                          table_ref_1->alias, field_1->field_name,
-                          table_ref_2->alias, field_2->field_name));
-
       if (!item_1 || !item_2)
         goto err;                               // out of memory
 
@@ -3560,7 +3527,6 @@ mark_common_columns(THD *thd, TABLE_LIST *table_ref_1, TABLE_LIST *table_ref_2,
                   eq_cond);
 
       nj_col_1->is_common= nj_col_2->is_common= TRUE;
-      nj_col_1->is_coalesced= nj_col_2->is_coalesced= TRUE;
 
       if (field_1)
       {
@@ -4310,29 +4276,28 @@ insert_fields(THD *thd, Name_resolution_context *context, const char *db_name,
   }
 
   found= FALSE;
-  for (TABLE_LIST *tables= context->first_name_resolution_table;
+
+  /*
+    If table names are qualified, then loop over all tables used in the query,
+    else treat natural joins as leaves and do not iterate over their underlying
+    tables.
+  */
+  for (TABLE_LIST *tables= (table_name ? context->table_list :
+                            context->first_name_resolution_table);
        tables;
-       tables= tables->next_name_resolution_table)
+       tables= (table_name ? tables->next_local :
+                tables->next_name_resolution_table)
+       )
   {
     Field *field;
     TABLE *table= tables->table;
 
     DBUG_ASSERT(tables->is_leaf_for_name_resolution());
 
-    /*
-      If optional table and db names do not match the ones used to qualify
-      the field being expanded, skip this table reference. However if this is
-      a NATURAL/USING join, we can't simply skip the whole table reference,
-      because  its columns may come from different tables/views. For NATURAL/
-      USING joins we perform this test for each column in the loop below.
-    */
-    if (!tables->is_natural_join)
-    {
-      if (table_name && my_strcasecmp(table_alias_charset, table_name,
-                                      tables->alias) ||
-          (db_name && strcmp(tables->db,db_name)))
-        continue;
-    }
+    if (table_name && my_strcasecmp(table_alias_charset, table_name,
+                                    tables->alias) ||
+        (db_name && strcmp(tables->db,db_name)))
+      continue;
 
 #ifndef NO_EMBEDDED_ACCESS_CHECKS
     /* Ensure that we have access rights to all fields to be inserted. */
@@ -4369,21 +4334,6 @@ insert_fields(THD *thd, Name_resolution_context *context, const char *db_name,
     {
       Item *item;
 
-      /*
-        If this is a column of a NATURAL/USING join, and the star was
-        qualified with a table (and database) name, check if the
-        column is not a coalesced one, and if not, that is belongs to
-        the same table.
-      */
-      if (tables->is_natural_join && table_name)
-      {
-        if (field_iterator.is_coalesced() ||
-            my_strcasecmp(table_alias_charset, table_name,
-                          field_iterator.table_name()) ||
-            (db_name && strcmp(db_name, field_iterator.db_name())))
-          continue;
-      }
-
       if (!(item= field_iterator.create_item(thd)))
         DBUG_RETURN(TRUE);
 
@@ -4410,18 +4360,18 @@ insert_fields(THD *thd, Name_resolution_context *context, const char *db_name,
                     tables->is_natural_join);
         DBUG_ASSERT(item->type() == Item::FIELD_ITEM);
         Item_field *fld= (Item_field*) item;
-        const char *table_name= field_iterator.table_name();
+        const char *field_table_name= field_iterator.table_name();
 
         if (!tables->schema_table && 
             !(fld->have_privileges=
               (get_column_grant(thd, field_iterator.grant(),
                                 field_iterator.db_name(),
-                                table_name, fld->field_name) &
+                                field_table_name, fld->field_name) &
                VIEW_ANY_ACL)))
         {
           my_error(ER_COLUMNACCESS_DENIED_ERROR, MYF(0), "ANY",
                    thd->priv_user, thd->host_or_ip,
-                   fld->field_name, table_name);
+                   fld->field_name, field_table_name);
           DBUG_RETURN(TRUE);
         }
       }

sql/table.cc

@@ -2289,7 +2289,6 @@ Natural_join_column::Natural_join_column(Field_translator *field_param,
   table_field= NULL;
   table_ref= tab;
   is_common= FALSE;
-  is_coalesced= FALSE;
 }
 
 
@@ -2301,7 +2300,6 @@ Natural_join_column::Natural_join_column(Field *field_param,
   view_field= NULL;
   table_ref= tab;
   is_common= FALSE;
-  is_coalesced= FALSE;
 }
 
 
@@ -2641,13 +2639,6 @@ GRANT_INFO *Field_iterator_table_ref::grant()
 }
 
 
-bool Field_iterator_table_ref::is_coalesced()
-{
-  if (table_ref->is_natural_join)
-    return natural_join_it.column_ref()->is_coalesced;
-  return FALSE;
-}
-
 /*
   Create new or return existing column reference to a column of a
   natural/using join.

sql/table.h

@@ -388,12 +388,6 @@ public:
     we are looking at some column.
   */
   bool is_common;
-  /*
-    A column is coalesced if it was common in some of several nested NATURAL/
-    USING joins. We have to know this, because according to ANSI, coalesced
-    columns cannot be qualified. 
-  */
-  bool is_coalesced;
 public:
   Natural_join_column(Field_translator *field_param, st_table_list *tab);
   Natural_join_column(Field *field_param, st_table_list *tab);
@@ -741,7 +735,6 @@ public:
   const char *table_name();
   const char *db_name();
   GRANT_INFO *grant();
-  bool is_coalesced();
   Item *create_item(THD *thd) { return field_it->create_item(thd); }
   Field *field() { return field_it->field(); }
   Natural_join_column *get_or_create_column_ref(THD *thd, bool *is_created);

tests/mysql_client_test.c

@@ -11801,8 +11801,8 @@ static void test_bug6046()
 
   stmt= mysql_stmt_init(mysql);
 
-  stmt_text= "SELECT a FROM t1 NATURAL JOIN t1 as X1 "
-             "WHERE b > ? ORDER BY a";
+  stmt_text= "SELECT t1.a FROM t1 NATURAL JOIN t1 as X1 "
+             "WHERE t1.b > ? ORDER BY t1.a";
 
   rc= mysql_stmt_prepare(stmt, stmt_text, strlen(stmt_text));
   check_execute(stmt, rc);