Merge bodhi.local:/opt/local/work/mysql-5.0-runtime-safemerge

into  bodhi.local:/opt/local/work/mysql-5.1-runtime-merge


BitKeeper/deleted/.del-im_check_os.inc:
  Auto merged
BitKeeper/deleted/.del-im_options_set.imtest~b53d9d60e5684833:
  Auto merged
BitKeeper/deleted/.del-im_options_set.result~59278f56be61d921:
  Auto merged
BitKeeper/deleted/.del-im_options_unset.imtest~768eb186b51d0048:
  Auto merged
configure.in:
  Auto merged
BitKeeper/deleted/.del-im_options_unset.result~20a4790cd3c70a4f:
  Auto merged
include/mysql_com.h:
  Auto merged
mysql-test/lib/mtr_io.pl:
  Auto merged
mysql-test/r/im_daemon_life_cycle.result:
  Auto merged
mysql-test/r/im_life_cycle.result:
  Auto merged
mysql-test/r/im_utils.result:
  Auto merged
mysql-test/r/sp-error.result:
  Auto merged
mysql-test/r/trigger.result:
  Auto merged
mysql-test/r/type_varchar.result:
  Auto merged
mysql-test/r/view.result:
  Auto merged
mysql-test/t/im_daemon_life_cycle.imtest:
  Auto merged
mysql-test/t/im_life_cycle.imtest:
  Auto merged
mysql-test/t/im_utils.imtest:
  Auto merged
mysql-test/t/sp-error.test:
  Auto merged
mysql-test/t/trigger.test:
  Auto merged
mysql-test/t/type_varchar.test:
  Auto merged
mysql-test/t/view.test:
  Auto merged
sql/item.cc:
  Auto merged
sql/item.h:
  Auto merged
sql/item_cmpfunc.cc:
  Auto merged
sql/item_func.cc:
  Auto merged
sql/item_row.cc:
  Auto merged
sql/item_strfunc.cc:
  Auto merged
sql/item_strfunc.h:
  Auto merged
sql/mysql_priv.h:
  Auto merged
sql/net_serv.cc:
  Auto merged
sql/protocol.cc:
  Auto merged
sql/sp_head.cc:
  Auto merged
sql/sql_acl.cc:
  Auto merged
sql/sql_cache.cc:
  Auto merged
sql/sql_cache.h:
  Auto merged
sql/sql_class.cc:
  Auto merged
sql/sql_error.cc:
  Auto merged
sql/sql_parse.cc:
  Auto merged
sql/sql_trigger.h:
  Auto merged
sql/sql_yacc.yy:
  Auto merged
mysql-test/mysql-test-run.pl:
  Use local. Alik will merge his changes manually.
mysql-test/lib/mtr_process.pl:
  Use local.
mysql-test/r/grant.result:
  Use local.
mysql-test/r/sp.result:
  Use local.
mysql-test/r/ps.result:
  Manual merge.
mysql-test/t/grant.test:
  Manual merge.
mysql-test/t/ps.test:
  Manual merge.
mysql-test/t/sp.test:
  Manual merge.
sql/Makefile.am:
  Manual merge.
sql/field.cc:
  Manual merge.
sql/mysqld.cc:
  Manual merge.
sql/share/errmsg.txt:
  Manual merge.
sql/sp.cc:
  Manual merge.
sql/sp_head.h:
  Manual merge.
sql/sql_trigger.cc:
  Manual merge.
sql/sql_view.cc:
  Manual merge.

1 files changed, 11 insertions, 1 deletions

diff --git a/sql/item_row.cc b/sql/item_row.cc
index c7b678323a8..6e71ae0d4db 100644
--- a/sql/item_row.cc
+++ b/sql/item_row.cc
@@ -156,12 +156,22 @@ bool Item_row::walk(Item_processor processor, bool walk_subquery, byte *arg)
 
 Item *Item_row::transform(Item_transformer transformer, byte *arg)
 {
+  DBUG_ASSERT(!current_thd->is_stmt_prepare());
+
   for (uint i= 0; i < arg_count; i++)
   {
     Item *new_item= items[i]->transform(transformer, arg);
     if (!new_item)
       return 0;
-    items[i]= new_item;
+
+    /*
+      THD::change_item_tree() should be called only if the tree was
+      really transformed, i.e. when a new item has been created.
+      Otherwise we'll be allocating a lot of unnecessary memory for
+      change records at each execution.
+    */
+    if (items[i] != new_item)
+      current_thd->change_item_tree(&items[i], new_item);
   }
   return (this->*transformer)(arg);
 }