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

into  moonbone.local:/work/27990-bug-5.0-opt-mysql

sql/field.cc

@@ -1356,15 +1356,25 @@ void Field_num::add_zerofill_and_unsigned(String &res) const
 
 void Field::make_field(Send_field *field)
 {
-  if (orig_table->s->table_cache_key && *(orig_table->s->table_cache_key))
+  if (orig_table && orig_table->s->table_cache_key &&
+      *(orig_table->s->table_cache_key))
   {
     field->org_table_name= orig_table->s->table_name;
     field->db_name= orig_table->s->table_cache_key;
   }
   else
     field->org_table_name= field->db_name= "";
+  if (orig_table)
+  {
     field->table_name= orig_table->alias;
-  field->col_name= field->org_col_name= field_name;
+    field->org_col_name= field_name;
+  }
+  else
+  {
+    field->table_name= "";
+    field->org_col_name= "";
+  }
+  field->col_name= field_name;
   field->charsetnr= charset()->number;
   field->length=field_length;
   field->type=type();

sql/sql_select.cc

@@ -14330,6 +14330,9 @@ change_to_use_tmp_fields(THD *thd, Item **ref_pointer_array,
 	  item_field= (Item*) new Item_field(field);
 	if (!item_field)
 	  DBUG_RETURN(TRUE);                    // Fatal error
+
+        if (item->real_item()->type() != Item::FIELD_ITEM)
+          field->orig_table= 0;
 	item_field->name= item->name;
         if (item->type() == Item::REF_ITEM)
         {

tests/mysql_client_test.c

@@ -15490,7 +15490,7 @@ static void test_bug21635()
   char *query_end;
   MYSQL_RES *result;
   MYSQL_FIELD *field;
-  unsigned int field_count, i;
+  unsigned int field_count, i, j;
   int rc;
 
   DBUG_ENTER("test_bug21635");
@@ -15506,6 +15506,12 @@ static void test_bug21635()
   myquery(rc);
   rc= mysql_query(mysql, "CREATE TABLE t1 (i INT)");
   myquery(rc);
+  /*
+    We need this loop to ensure correct behavior with both constant and
+    non-constant tables.
+  */
+  for (j= 0; j < 2 ; j++)
+  {
     rc= mysql_query(mysql, "INSERT INTO t1 VALUES (1)");
     myquery(rc);
 
@@ -15528,6 +15534,7 @@ static void test_bug21635()
     }
 
     mysql_free_result(result);
+  }
   rc= mysql_query(mysql, "DROP TABLE t1");
   myquery(rc);