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Fixed strict alias problem by replacing = with memcpy()

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This commit is contained in:
Michael Widenius 2011-06-07 10:29:08 +03:00
parent 059aff15cd
commit 370f79e389
1 changed files with 5 additions and 1 deletions
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6
sql/sql_class.h
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@ -2334,7 +2334,11 @@ public:
{ {
if (!stmt_arena->is_conventional()) if (!stmt_arena->is_conventional())
check_and_register_item_tree_change(place, new_value, mem_root); check_and_register_item_tree_change(place, new_value, mem_root);
*place= *new_value; /*
We have to use memcpy instead of *place= *new_value merge to
avoid problems with strict aliasing.
*/
memcpy((char*) place, new_value, sizeof(*new_value));
} }
void nocheck_register_item_tree_change(Item **place, Item *old_value, void nocheck_register_item_tree_change(Item **place, Item *old_value,
MEM_ROOT *runtime_memroot); MEM_ROOT *runtime_memroot);