join_outer.result, join_outer.test:

  Added cases for bugs #6307 and #6460.
sql_select.cc:
  Fixed the problem of bug reports #6307 and #6460.
  The reported wrong result sets were due to the fact that
  the added call of the fix_fields method for the built
  AND condition that joined WHERE and ON conditions
  broke ON expression, as it removed extra AND levels
  in the built condition. 
  It looks like that no attributes of the built condition
  are needed, so we don't have to call fix_fields here.

mysql-test/r/join_outer.result

@@ -751,3 +751,68 @@ player_id	match_1_h	*	match_id	home	UUX
 7	4	*	1	2	2
 3	3	*	1	2	1
 drop table t1, t2;
+create table t1 (a int, b int, unique index idx (a, b));
+create table t2 (a int, b int, c int, unique index idx (a, b));
+insert into t1 values (1, 10), (1,11), (2,10), (2,11);
+insert into t2 values (1,10,3);
+select t1.a, t1.b, t2.c from t1 left join t2
+on t1.a=t2.a and t1.b=t2.b and t2.c=3
+where t1.a=1 and t2.c is null;
+a	b	c
+1	11	NULL
+drop table t1, t2;
+CREATE TABLE t1 (
+ts_id bigint(20) default NULL,
+inst_id tinyint(4) default NULL,
+flag_name varchar(64) default NULL,
+flag_value text,
+UNIQUE KEY ts_id (ts_id,inst_id,flag_name)
+) ENGINE=MyISAM DEFAULT CHARSET=utf8;
+CREATE TABLE t2 (
+ts_id bigint(20) default NULL,
+inst_id tinyint(4) default NULL,
+flag_name varchar(64) default NULL,
+flag_value text,
+UNIQUE KEY ts_id (ts_id,inst_id,flag_name)
+) ENGINE=MyISAM DEFAULT CHARSET=utf8;
+INSERT INTO t1 VALUES
+(111056548820001, 0, 'flag1', NULL),
+(111056548820001, 0, 'flag2', NULL),
+(2, 0, 'other_flag', NULL);
+INSERT INTO t2 VALUES
+(111056548820001, 3, 'flag1', 'sss');
+SELECT t1.flag_name,t2.flag_value 
+FROM t1 LEFT JOIN t2 
+ON (t1.ts_id = t2.ts_id AND t1.flag_name = t2.flag_name AND
+t2.inst_id = 3) 
+WHERE t1.inst_id = 0 AND t1.ts_id=111056548820001 AND
+t2.flag_value IS  NULL;
+flag_name	flag_value
+flag2	NULL
+DROP TABLE t1,t2;
+CREATE TABLE invoice (
+id int(11) unsigned NOT NULL auto_increment,
+text_id int(10) unsigned default NULL,
+PRIMARY KEY  (id)
+);
+INSERT INTO invoice VALUES("1", "0");
+INSERT INTO invoice VALUES("2", "10");
+CREATE TABLE text_table (
+text_id char(3) NOT NULL default '',
+language_id char(3) NOT NULL default '',
+text_data text,
+PRIMARY KEY  (text_id,language_id)
+);
+INSERT INTO text_table VALUES("0", "EN", "0-EN");
+INSERT INTO text_table VALUES("0", "SV", "0-SV");
+INSERT INTO text_table VALUES("10", "EN", "10-EN");
+INSERT INTO text_table VALUES("10", "SV", "10-SV");
+SELECT invoice.id, invoice.text_id, text_table.text_data
+FROM invoice LEFT JOIN text_table
+ON invoice.text_id = text_table.text_id
+AND text_table.language_id = 'SV'
+  WHERE (invoice.id LIKE '%' OR text_table.text_data LIKE '%');
+id	text_id	text_data
+1	0	0-SV
+2	10	10-SV
+DROP TABLE invoice, text_table;

mysql-test/t/join_outer.test

@@ -506,3 +506,79 @@ select s.*, '*', m.*, (s.match_1_h - m.home) UUX from
   order by UUX desc;
 
 drop table t1, t2;
+
+# Tests for bugs #6307 and 6460
+
+create table t1 (a int, b int, unique index idx (a, b));
+create table t2 (a int, b int, c int, unique index idx (a, b));
+
+insert into t1 values (1, 10), (1,11), (2,10), (2,11);
+insert into t2 values (1,10,3);
+
+select t1.a, t1.b, t2.c from t1 left join t2
+                                on t1.a=t2.a and t1.b=t2.b and t2.c=3
+   where t1.a=1 and t2.c is null;
+
+drop table t1, t2;
+
+CREATE TABLE t1 (
+  ts_id bigint(20) default NULL,
+  inst_id tinyint(4) default NULL,
+  flag_name varchar(64) default NULL,
+  flag_value text,
+  UNIQUE KEY ts_id (ts_id,inst_id,flag_name)
+) ENGINE=MyISAM DEFAULT CHARSET=utf8;
+
+CREATE TABLE t2 (
+  ts_id bigint(20) default NULL,
+  inst_id tinyint(4) default NULL,
+  flag_name varchar(64) default NULL,
+  flag_value text,
+  UNIQUE KEY ts_id (ts_id,inst_id,flag_name)
+) ENGINE=MyISAM DEFAULT CHARSET=utf8;
+
+INSERT INTO t1 VALUES
+  (111056548820001, 0, 'flag1', NULL),
+  (111056548820001, 0, 'flag2', NULL),
+  (2, 0, 'other_flag', NULL);
+
+INSERT INTO t2 VALUES
+  (111056548820001, 3, 'flag1', 'sss');
+
+SELECT t1.flag_name,t2.flag_value 
+  FROM t1 LEFT JOIN t2 
+          ON (t1.ts_id = t2.ts_id AND t1.flag_name = t2.flag_name AND
+              t2.inst_id = 3) 
+  WHERE t1.inst_id = 0 AND t1.ts_id=111056548820001 AND
+        t2.flag_value IS  NULL;
+
+DROP TABLE t1,t2;
+
+CREATE TABLE invoice (
+  id int(11) unsigned NOT NULL auto_increment,
+  text_id int(10) unsigned default NULL,
+  PRIMARY KEY  (id)
+);
+
+INSERT INTO invoice VALUES("1", "0");
+INSERT INTO invoice VALUES("2", "10");
+
+CREATE TABLE text_table (
+  text_id char(3) NOT NULL default '',
+  language_id char(3) NOT NULL default '',
+  text_data text,
+  PRIMARY KEY  (text_id,language_id)
+);
+
+INSERT INTO text_table VALUES("0", "EN", "0-EN");
+INSERT INTO text_table VALUES("0", "SV", "0-SV");
+INSERT INTO text_table VALUES("10", "EN", "10-EN");
+INSERT INTO text_table VALUES("10", "SV", "10-SV");
+
+SELECT invoice.id, invoice.text_id, text_table.text_data
+  FROM invoice LEFT JOIN text_table
+               ON invoice.text_id = text_table.text_id
+                  AND text_table.language_id = 'SV'
+  WHERE (invoice.id LIKE '%' OR text_table.text_data LIKE '%');
+
+DROP TABLE invoice, text_table;

sql/sql_select.cc

@@ -3507,8 +3507,17 @@ make_join_select(JOIN *join,SQL_SELECT *select,COND *cond)
 	    /* Join with outer join condition */
 	    COND *orig_cond=sel->cond;
 	    sel->cond= and_conds(sel->cond, tab->on_expr);
+
+	    /*
+              We can't call sel->cond->fix_fields,
+              as it will break tab->on_expr if it's AND condition
+              (fix_fields currently removes extra AND/OR levels).
+              Yet attributes of the just built condition are not needed.
+              Thus we call sel->cond->quick_fix_field for safety.
+	    */
 	    if (sel->cond && !sel->cond->fixed)
-	      sel->cond->fix_fields(join->thd, 0, &sel->cond);
+	      sel->cond->quick_fix_field();
+
 	    if (sel->test_quick_select(join->thd, tab->keys,
 				       used_tables & ~ current_map,
 				       (join->select_options &