outer references in subqueries in INSERT

remove inconsistent limitation

mysql-test/main/insert.result

@@ -751,3 +751,19 @@ REPLACE INTO v1 SET f = NULL;
 ERROR 22007: Truncated incorrect DOUBLE value: 'foo'
 DROP VIEW v1;
 DROP TABLE t1;
+create table t1 (a int default 5);
+insert t1 values (1);
+insert t1 values (a);
+insert t1 values ((select a+1));
+insert t1 set a=2;
+insert t1 set a=a+2;
+insert t1 set a=(select a+3);
+select * from t1;
+a
+1
+5
+6
+2
+7
+8
+drop table t1;

mysql-test/main/insert.test

@@ -612,3 +612,16 @@ CREATE VIEW v1 AS SELECT * FROM t1 WHERE f <=> 'foo' WITH CHECK OPTION;
 REPLACE INTO v1 SET f = NULL;
 DROP VIEW v1;
 DROP TABLE t1;
+
+#
+# outer referencesin subqueries in INSERT
+#
+create table t1 (a int default 5);
+insert t1 values (1);
+insert t1 values (a);
+insert t1 values ((select a+1));
+insert t1 set a=2;
+insert t1 set a=a+2;
+insert t1 set a=(select a+3);
+select * from t1;
+drop table t1;

mysql-test/main/subselect.result

@@ -682,8 +682,6 @@ x
 3
 11
 11
-INSERT DELAYED INTO t1 (x) VALUES ((SELECT SUM(x) FROM t2));
-ERROR 42S22: Unknown column 'x' in 'field list'
 INSERT DELAYED INTO t1 (x) VALUES ((SELECT SUM(a) FROM t2));
 select * from t1;
 x

mysql-test/main/subselect.test

@@ -394,8 +394,6 @@ select * from t1;
 # After this, only data based on old t1 records should have been added.
 INSERT INTO t1 (x) select (SELECT SUM(x)+2 FROM t1) FROM t2;
 select * from t1;
--- error ER_BAD_FIELD_ERROR
-INSERT DELAYED INTO t1 (x) VALUES ((SELECT SUM(x) FROM t2));
 let $row_count_before= `SELECT COUNT(*) FROM t1`;
 INSERT DELAYED INTO t1 (x) VALUES ((SELECT SUM(a) FROM t2));
 let $wait_condition= SELECT COUNT(*) <> $row_count_before FROM t1;

mysql-test/main/subselect_no_exists_to_in.result

@@ -686,8 +686,6 @@ x
 3
 11
 11
-INSERT DELAYED INTO t1 (x) VALUES ((SELECT SUM(x) FROM t2));
-ERROR 42S22: Unknown column 'x' in 'field list'
 INSERT DELAYED INTO t1 (x) VALUES ((SELECT SUM(a) FROM t2));
 select * from t1;
 x

mysql-test/main/subselect_no_mat.result

@@ -689,8 +689,6 @@ x
 3
 11
 11
-INSERT DELAYED INTO t1 (x) VALUES ((SELECT SUM(x) FROM t2));
-ERROR 42S22: Unknown column 'x' in 'field list'
 INSERT DELAYED INTO t1 (x) VALUES ((SELECT SUM(a) FROM t2));
 select * from t1;
 x

mysql-test/main/subselect_no_opts.result

@@ -685,8 +685,6 @@ x
 3
 11
 11
-INSERT DELAYED INTO t1 (x) VALUES ((SELECT SUM(x) FROM t2));
-ERROR 42S22: Unknown column 'x' in 'field list'
 INSERT DELAYED INTO t1 (x) VALUES ((SELECT SUM(a) FROM t2));
 select * from t1;
 x

mysql-test/main/subselect_no_scache.result

@@ -688,8 +688,6 @@ x
 3
 11
 11
-INSERT DELAYED INTO t1 (x) VALUES ((SELECT SUM(x) FROM t2));
-ERROR 42S22: Unknown column 'x' in 'field list'
 INSERT DELAYED INTO t1 (x) VALUES ((SELECT SUM(a) FROM t2));
 select * from t1;
 x

mysql-test/main/subselect_no_semijoin.result

@@ -685,8 +685,6 @@ x
 3
 11
 11
-INSERT DELAYED INTO t1 (x) VALUES ((SELECT SUM(x) FROM t2));
-ERROR 42S22: Unknown column 'x' in 'field list'
 INSERT DELAYED INTO t1 (x) VALUES ((SELECT SUM(a) FROM t2));
 select * from t1;
 x

sql/sql_insert.cc

@@ -1512,25 +1512,6 @@ bool mysql_prepare_insert(THD *thd, TABLE_LIST *table_list,
     DBUG_RETURN(TRUE); 
   if (thd->lex->handle_list_of_derived(table_list, DT_PREPARE))
     DBUG_RETURN(TRUE); 
-  /*
-    For subqueries in VALUES() we should not see the table in which we are
-    inserting (for INSERT ... SELECT this is done by changing table_list,
-    because INSERT ... SELECT share SELECT_LEX it with SELECT.
-  */
-  if (!select_insert)
-  {
-    for (SELECT_LEX_UNIT *un= select_lex->first_inner_unit();
-         un;
-         un= un->next_unit())
-    {
-      for (SELECT_LEX *sl= un->first_select();
-           sl;
-           sl= sl->next_select())
-      {
-        sl->context.outer_context= 0;
-      }
-    }
-  }
 
   if (duplic == DUP_UPDATE)
   {