Merge epotemkin@bk-internal.mysql.com:/home/bk/mysql-5.0

into  moonbone.local:/work/mysql-5.0-bug-11111

sql/item.h

@@ -1352,7 +1352,13 @@ class Item_ref :public Item_ident
   {
     (*ref)->save_in_field(result_field, no_conversions);
   }
-  Item *real_item() { return *ref; }
+  Item *real_item() {
+    Item *item= this;
+    do
+      item= *((Item_ref *)item)->ref;
+    while (item->type() == Item::REF_ITEM);
+    return item;
+  }
   bool walk(Item_processor processor, byte *arg)
   { return (*ref)->walk(processor, arg); }
   void print(String *str);

sql/sql_select.cc

@@ -7957,6 +7957,19 @@ Field *create_tmp_field(THD *thd, TABLE *table,Item *item, Item::Type type,
                                        modify_item ? (Item_field*) item : NULL,
                                        convert_blob_length);
   }
+  case Item::REF_ITEM:
+    if ( ((Item_ref*)item)->real_item()->type() == Item::FIELD_ITEM)
+    {
+      Item_field *field= (Item_field*) *((Item_ref*)item)->ref;
+      Field *new_field= create_tmp_field_from_field(thd, 
+                               (*from_field= field->field),
+                               item->name, table,
+                               NULL,
+                               convert_blob_length);
+      if (modify_item)
+        item->set_result_field(new_field);
+      return new_field;
+    }
   case Item::FUNC_ITEM:
   case Item::COND_ITEM:
   case Item::FIELD_AVG_ITEM:
@@ -7968,7 +7981,6 @@ Field *create_tmp_field(THD *thd, TABLE *table,Item *item, Item::Type type,
   case Item::REAL_ITEM:
   case Item::DECIMAL_ITEM:
   case Item::STRING_ITEM:
-  case Item::REF_ITEM:
   case Item::NULL_ITEM:
   case Item::VARBIN_ITEM:
     return create_tmp_field_from_item(thd, item, table, copy_func, modify_item,

tests/mysql_client_test.c

@@ -13145,6 +13145,48 @@ static void test_bug9643()
   myquery(rc);
 }
 
+/*
+  Bug#11111: fetch from view returns wrong data
+*/
+
+static void test_bug11111()
+{
+  MYSQL_STMT 	*stmt;
+  MYSQL_BIND	bind[2];
+  char		buf[2][20];
+  long		len[2];
+  int i;
+  const char * query = "SELECT DISTINCT f1,ff2 FROM v1";
+
+  mysql_query(mysql, "drop table if exists t1, t2, v1");
+  mysql_query(mysql, "create table t1 (f1 int, f2 int)");
+  mysql_query(mysql, "create table t2 (ff1 int, ff2 int)");
+  mysql_query(mysql, "create view v1 as select * from t1, t2 where f1=ff1");
+  mysql_query(mysql, "insert into t1 values (1,1), (2,2), (3,3)");
+  mysql_query(mysql, "insert into t2 values (1,1), (2,2), (3,3)");
+
+  stmt = mysql_stmt_init(mysql);
+
+  mysql_stmt_prepare(stmt, query, strlen(query));
+  mysql_stmt_execute(stmt);
+
+  for (i=0; i < 2; i++) {
+    memset(&bind[i], '\0', sizeof(MYSQL_BIND));
+    bind[i].buffer_type= MYSQL_TYPE_STRING;
+    bind[i].buffer= (gptr *)&buf[i];
+    bind[i].buffer_length= 20;
+    bind[i].length= &len[i];
+  } 
+
+  if (mysql_stmt_bind_result(stmt, bind))
+    printf("Error: %s\n", mysql_stmt_error(stmt));
+
+  mysql_stmt_fetch(stmt);
+  DIE_UNLESS(!strcmp(buf[1],"1"));	
+  mysql_stmt_close(stmt);
+  mysql_query(mysql, "drop table t1, t2, v1");
+}
+
 /*
   Check that proper cleanups are done for prepared statement when
   fetching thorugh a cursor.
@@ -13439,6 +13481,7 @@ static struct my_tests_st my_tests[]= {
   { "test_bug9478", test_bug9478 },
   { "test_bug9643", test_bug9643 },
   { "test_bug10729", test_bug10729 },
+  { "test_bug11111", test_bug11111 },
   { 0, 0 }
 };