MariaDB 5.2 -> MariaDB 5.3 merge

1 files changed, 21 insertions, 4 deletions

diff --git a/sql/item_subselect.cc b/sql/item_subselect.cc
index 741cd2e3e85..a20cc146531 100644
--- a/sql/item_subselect.cc
+++ b/sql/item_subselect.cc
@@ -121,6 +121,21 @@ void Item_subselect::cleanup()
   DBUG_VOID_RETURN;
 }
 
+
+/*
+   We cannot use generic Item::safe_charset_converter() because
+   Subselect transformation does not happen in view_prepare_mode
+   and thus we can not evaluate val_...() for const items.
+*/
+
+Item *Item_subselect::safe_charset_converter(CHARSET_INFO *tocs)
+{
+  Item_func_conv_charset *conv=
+    new Item_func_conv_charset(this, tocs, thd->lex->view_prepare_mode ? 0 : 1);
+  return conv->safe ? conv : NULL;
+}
+
+
 void Item_singlerow_subselect::cleanup()
 {
   DBUG_ENTER("Item_singlerow_subselect::cleanup");
@@ -447,11 +462,13 @@ bool Item_subselect::exec()
 {
   int res;
 
-  if (thd->is_error())
-  {
-    /* Do not execute subselect in case of a fatal error */
+  /*
+    Do not execute subselect in case of a fatal error
+    or if the query has been killed.
+  */
+  if (thd->is_error() || thd->killed)
     return 1;
-  }
+
   /*
     Simulate a failure in sub-query execution. Used to test e.g.
     out of memory or query being killed conditions.