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MWL#89

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Merge 5.3 with 5.3-mwl89.
This commit is contained in:
unknown 2011-03-30 10:10:59 +03:00
commit 952556b345
72 changed files with 8719 additions and 1594 deletions
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15
sql/item_cmpfunc.h
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@ -266,6 +266,10 @@ public:
void keep_top_level_cache();
Item *transform(Item_transformer transformer, uchar *arg);
virtual Item *expr_cache_insert_transformer(uchar *thd_arg);
bool is_expensive_processor(uchar *arg);
bool is_expensive();
void set_join_tab_idx(uint join_tab_idx_arg)
{ args[1]->set_join_tab_idx(join_tab_idx_arg); }
};
class Comp_creator
@ -1303,8 +1307,6 @@ public:
class Item_func_isnull :public Item_bool_func
{
protected:
longlong cached_value;
public:
Item_func_isnull(Item *a) :Item_bool_func(a) {}
longlong val_int();
@ -1322,18 +1324,9 @@ public:
{
used_tables_cache= 0; /* is always false */
const_item_cache= 1;
cached_value= (longlong) 0;
}
else
{
args[0]->update_used_tables();
if ((const_item_cache= !(used_tables_cache= args[0]->used_tables()) &&
!with_subselect))
{
/* Remember if the value is always NULL or never NULL */
cached_value= (longlong) args[0]->is_null();
}
}
}
table_map not_null_tables() const { return 0; }
optimize_type select_optimize() const { return OPTIMIZE_NULL; }