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Fix of MDEV-3874: Server crashes in Item_field::print on a SELECT from a MERGE view with materialization+semijoin, subquery, ORDER BY.

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The problem was that in debugging binaries it try to print item to assign human readable name to the item.
But subquery item was already freed (join_free/cleanup with full cleanup) so Item_field refers to temporary
table which memory had been already freed.
This commit is contained in:
unknown
2012-11-26 21:22:44 +02:00
parent 5e345281e3
commit b8b875cb79
4 changed files with 83 additions and 0 deletions
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3
sql/sql_select.h
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@ -1141,6 +1141,8 @@ public:
bool skip_sort_order;
bool need_tmp, hidden_group_fields;
/* TRUE if there was full cleunap of the JOIN */
bool cleaned;
DYNAMIC_ARRAY keyuse;
Item::cond_result cond_value, having_value;
List<Item> all_fields; ///< to store all fields that used in query
@ -1268,6 +1270,7 @@ public:
zero_result_cause= 0;
optimized= 0;
initialized= 0;
cleaned= 0;
cond_equal= 0;
having_equal= 0;
exec_const_cond= 0;