From 4d29767e6c57198eb4650421f730701b4dd4d2d7 Mon Sep 17 00:00:00 2001
From: Tor Didriksen <tor.didriksen@oracle.com>
Date: Mon, 1 Oct 2012 13:12:38 +0200
Subject: Bug#14683676 ENDLESS MEMORY CONSUMPTION IN SETUP_REF_ARRAY WITH MAX
 IN SUBQUERY

n_child_sum_items kept increasing.
Since it is used for calculating the size of ref_pointer_array,
we will allocate larger and larger chunks of memory, until we hit some
operating system limit.
The memory is free()d at disconnect, but is most likely *not*
returned to the operating system.
---
 sql/sql_lex.cc | 1 +
 1 file changed, 1 insertion(+)

(limited to 'sql')

diff --git a/sql/sql_lex.cc b/sql/sql_lex.cc
index fd9367b99f2..e171cf1c06d 100644
--- a/sql/sql_lex.cc
+++ b/sql/sql_lex.cc
@@ -1616,6 +1616,7 @@ void st_select_lex::init_query()
   ref_pointer_array= 0;
   select_n_where_fields= 0;
   select_n_having_items= 0;
+  n_child_sum_items= 0;
   subquery_in_having= explicit_limit= 0;
   is_item_list_lookup= 0;
   first_execution= 1;
-- 
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