addition of "REFERENCED_TABLE_SCHEMA",

  "REFERENCED_TABLE_NAME", "REFERENCED_COLUMN_NAME" fields into
  KEY_COLUMN_USAGE table

mysql-test/r/information_schema.result

@@ -412,11 +412,11 @@ NULL	test	key_1	test	t1	UNIQUE
 NULL	test	key_2	test	t1	UNIQUE
 select * from information_schema.KEY_COLUMN_USAGE where
 TABLE_SCHEMA= "test";
-CONSTRAINT_CATALOG	CONSTRAINT_SCHEMA	CONSTRAINT_NAME	TABLE_CATALOG	TABLE_SCHEMA	TABLE_NAME	COLUMN_NAME	ORDINAL_POSITION	POSITION_IN_UNIQUE_CONSTRAINT
-NULL	test	PRIMARY	NULL	test	t1	a	1	NULL
-NULL	test	constraint_1	NULL	test	t1	a	1	NULL
-NULL	test	key_1	NULL	test	t1	a	1	NULL
-NULL	test	key_2	NULL	test	t1	a	1	NULL
+CONSTRAINT_CATALOG	CONSTRAINT_SCHEMA	CONSTRAINT_NAME	TABLE_CATALOG	TABLE_SCHEMA	TABLE_NAME	COLUMN_NAME	ORDINAL_POSITION	POSITION_IN_UNIQUE_CONSTRAINT	REFERENCED_TABLE_SCHEMA	REFERENCED_TABLE_NAME	REFERENCED_COLUMN_NAME
+NULL	test	PRIMARY	NULL	test	t1	a	1	NULL	NULL	NULL	NULL
+NULL	test	constraint_1	NULL	test	t1	a	1	NULL	NULL	NULL	NULL
+NULL	test	key_1	NULL	test	t1	a	1	NULL	NULL	NULL	NULL
+NULL	test	key_2	NULL	test	t1	a	1	NULL	NULL	NULL	NULL
 select table_name from information_schema.TABLES where table_schema like "test%";
 table_name
 t1
@@ -560,7 +560,7 @@ TABLE_NAME= "vo";
 CONSTRAINT_CATALOG	CONSTRAINT_SCHEMA	CONSTRAINT_NAME	TABLE_SCHEMA	TABLE_NAME	CONSTRAINT_TYPE
 select * from information_schema.KEY_COLUMN_USAGE where
 TABLE_NAME= "vo";
-CONSTRAINT_CATALOG	CONSTRAINT_SCHEMA	CONSTRAINT_NAME	TABLE_CATALOG	TABLE_SCHEMA	TABLE_NAME	COLUMN_NAME	ORDINAL_POSITION	POSITION_IN_UNIQUE_CONSTRAINT
+CONSTRAINT_CATALOG	CONSTRAINT_SCHEMA	CONSTRAINT_NAME	TABLE_CATALOG	TABLE_SCHEMA	TABLE_NAME	COLUMN_NAME	ORDINAL_POSITION	POSITION_IN_UNIQUE_CONSTRAINT	REFERENCED_TABLE_SCHEMA	REFERENCED_TABLE_NAME	REFERENCED_COLUMN_NAME
 drop view vo;
 select TABLE_NAME,TABLE_TYPE,ENGINE
 from information_schema.tables 

mysql-test/r/information_schema_inno.result

 DROP TABLE IF EXISTS t1,t2;
 CREATE TABLE t1 (id INT NOT NULL, PRIMARY KEY (id)) ENGINE=INNODB;
-CREATE TABLE t2 (id INT PRIMARY KEY, t1_id INT, INDEX par_ind (t1_id),
+CREATE TABLE t2 (id INT PRIMARY KEY, t1_id INT, INDEX par_ind (t1_id, id),
 FOREIGN KEY (t1_id) REFERENCES t1(id)  ON DELETE CASCADE,
 FOREIGN KEY (t1_id) REFERENCES t1(id)  ON UPDATE CASCADE) ENGINE=INNODB;
+CREATE TABLE t3 (id INT PRIMARY KEY, t2_id INT, INDEX par_ind (t2_id),
+FOREIGN KEY (id, t2_id) REFERENCES t2(t1_id, id)  ON DELETE CASCADE) ENGINE=INNODB;
 select * from information_schema.TABLE_CONSTRAINTS where
 TABLE_SCHEMA= "test";
 CONSTRAINT_CATALOG	CONSTRAINT_SCHEMA	CONSTRAINT_NAME	TABLE_SCHEMA	TABLE_NAME	CONSTRAINT_TYPE
@@ -10,11 +12,16 @@ NULL	test	PRIMARY	test	t1	PRIMARY KEY
 NULL	test	PRIMARY	test	t2	PRIMARY KEY
 NULL	test	t2_ibfk_1	test	t2	FOREIGN KEY
 NULL	test	t2_ibfk_2	test	t2	FOREIGN KEY
+NULL	test	PRIMARY	test	t3	PRIMARY KEY
+NULL	test	t3_ibfk_1	test	t3	FOREIGN KEY
 select * from information_schema.KEY_COLUMN_USAGE where
 TABLE_SCHEMA= "test";
-CONSTRAINT_CATALOG	CONSTRAINT_SCHEMA	CONSTRAINT_NAME	TABLE_CATALOG	TABLE_SCHEMA	TABLE_NAME	COLUMN_NAME	ORDINAL_POSITION	POSITION_IN_UNIQUE_CONSTRAINT
-NULL	test	PRIMARY	NULL	test	t1	id	1	NULL
-NULL	test	PRIMARY	NULL	test	t2	id	1	NULL
-NULL	test	t2_ibfk_1	NULL	test	t2	t1_id	1	1
-NULL	test	t2_ibfk_2	NULL	test	t2	t1_id	1	1
-drop table t2, t1;
+CONSTRAINT_CATALOG	CONSTRAINT_SCHEMA	CONSTRAINT_NAME	TABLE_CATALOG	TABLE_SCHEMA	TABLE_NAME	COLUMN_NAME	ORDINAL_POSITION	POSITION_IN_UNIQUE_CONSTRAINT	REFERENCED_TABLE_SCHEMA	REFERENCED_TABLE_NAME	REFERENCED_COLUMN_NAME
+NULL	test	PRIMARY	NULL	test	t1	id	1	NULL	NULL	NULL	NULL
+NULL	test	PRIMARY	NULL	test	t2	id	1	NULL	NULL	NULL	NULL
+NULL	test	t2_ibfk_1	NULL	test	t2	t1_id	1	1	test	t1	id
+NULL	test	t2_ibfk_2	NULL	test	t2	t1_id	1	1	test	t1	id
+NULL	test	PRIMARY	NULL	test	t3	id	1	NULL	NULL	NULL	NULL
+NULL	test	t3_ibfk_1	NULL	test	t3	id	1	1	test	t2	t1_id
+NULL	test	t3_ibfk_1	NULL	test	t3	t2_id	2	2	test	t2	id
+drop table t3, t2, t1;

mysql-test/t/information_schema_inno.test

@@ -8,12 +8,16 @@ DROP TABLE IF EXISTS t1,t2;
 #
 
 CREATE TABLE t1 (id INT NOT NULL, PRIMARY KEY (id)) ENGINE=INNODB;
-CREATE TABLE t2 (id INT PRIMARY KEY, t1_id INT, INDEX par_ind (t1_id),
+CREATE TABLE t2 (id INT PRIMARY KEY, t1_id INT, INDEX par_ind (t1_id, id),
 FOREIGN KEY (t1_id) REFERENCES t1(id)  ON DELETE CASCADE,
 FOREIGN KEY (t1_id) REFERENCES t1(id)  ON UPDATE CASCADE) ENGINE=INNODB;
+
+CREATE TABLE t3 (id INT PRIMARY KEY, t2_id INT, INDEX par_ind (t2_id),
+FOREIGN KEY (id, t2_id) REFERENCES t2(t1_id, id)  ON DELETE CASCADE) ENGINE=INNODB;
+
 select * from information_schema.TABLE_CONSTRAINTS where
 TABLE_SCHEMA= "test";
 select * from information_schema.KEY_COLUMN_USAGE where
 TABLE_SCHEMA= "test";
 
-drop table t2, t1;
+drop table t3, t2, t1;

sql/sql_show.cc

@@ -3009,12 +3009,13 @@ static int get_schema_key_column_usage_record(THD *thd,
     while ((f_key_info= it++))
     {
       LEX_STRING *f_info;
+      LEX_STRING *r_info;
       List_iterator_fast<LEX_STRING> it(f_key_info->foreign_fields),
         it1(f_key_info->referenced_fields);
       uint f_idx= 0;
       while ((f_info= it++))
       {
-        it1++;                                  // Ignore r_info
+        r_info= it1++;
         f_idx++;
         restore_record(table, s->default_values);
         store_key_column_usage(table, base_name, file_name,
@@ -3024,6 +3025,17 @@ static int get_schema_key_column_usage_record(THD *thd,
                                (longlong) f_idx);
         table->field[8]->store((longlong) f_idx);
         table->field[8]->set_notnull();
+        table->field[9]->store(f_key_info->referenced_db->str,
+                               f_key_info->referenced_db->length,
+                               system_charset_info);
+        table->field[9]->set_notnull();
+        table->field[10]->store(f_key_info->referenced_table->str,
+                                f_key_info->referenced_table->length, 
+                                system_charset_info);
+        table->field[10]->set_notnull();
+        table->field[11]->store(r_info->str, r_info->length,
+                                system_charset_info);
+        table->field[11]->set_notnull();
         if (schema_table_store_record(thd, table))
           DBUG_RETURN(1);
       }
@@ -3771,6 +3783,9 @@ ST_FIELD_INFO key_column_usage_fields_info[]=
   {"COLUMN_NAME", NAME_LEN, MYSQL_TYPE_STRING, 0, 0, 0},
   {"ORDINAL_POSITION", 10 ,MYSQL_TYPE_LONG, 0, 0, 0},
   {"POSITION_IN_UNIQUE_CONSTRAINT", 10 ,MYSQL_TYPE_LONG, 0, 1, 0},
+  {"REFERENCED_TABLE_SCHEMA", NAME_LEN, MYSQL_TYPE_STRING, 0, 1, 0},
+  {"REFERENCED_TABLE_NAME", NAME_LEN, MYSQL_TYPE_STRING, 0, 1, 0},
+  {"REFERENCED_COLUMN_NAME", NAME_LEN, MYSQL_TYPE_STRING, 0, 1, 0},
   {0, 0, MYSQL_TYPE_STRING, 0, 0, 0}
 };