bzr push into mysql-5.1 branch (tor.didriksen:3829 to 3830) Bug#14683676

[Tor Didriksen]

 3830 Tor Didriksen	2012-10-01
      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.

    modified:
      sql/sql_lex.cc
 3829 Joerg Bruehe	2012-10-01 [merge]
      Merge 5.1.66 into main 5.1

    modified:
      support-files/mysql.spec.sh
=== modified file 'sql/sql_lex.cc'
--- a/sql/sql_lex.cc	2012-04-18 11:14:05 +0000
+++ b/sql/sql_lex.cc	2012-10-01 11:12:38 +0000
@@ -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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