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MDEV-7950 Item_func::type() takes 0.26% in OLTP RO

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Step #8: Adding get_mm_tree() in Item_func, Item_func_between,
Item_func_in, Item_equal. This removes one virtual call item->type()
in queries like:
  SELECT * FROM t1 WHERE c BETWEEN const1 AND const2;
  SELECT * FROM t1 WHERE c>const;
  SELECT * FROM t1 WHERE c IN (const_list);
This commit is contained in:
Alexander Barkov 2015-05-27 21:32:35 +04:00
commit 5991efc382
3 changed files with 175 additions and 132 deletions
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3
sql/item_cmpfunc.h
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@ -655,6 +655,7 @@ public:
void add_key_fields(JOIN *join, KEY_FIELD **key_fields,
uint *and_level, table_map usable_tables,
SARGABLE_PARAM **sargables);
SEL_TREE *get_mm_tree(RANGE_OPT_PARAM *param, Item **cond_ptr);
};
@ -1337,6 +1338,7 @@ public:
{ return OPTIMIZE_KEY; }
void add_key_fields(JOIN *join, KEY_FIELD **key_fields, uint *and_level,
table_map usable_tables, SARGABLE_PARAM **sargables);
SEL_TREE *get_mm_tree(RANGE_OPT_PARAM *param, Item **cond_ptr);
virtual void print(String *str, enum_query_type query_type);
enum Functype functype() const { return IN_FUNC; }
const char *func_name() const { return " IN "; }
@ -1927,6 +1929,7 @@ public:
void add_key_fields(JOIN *join, KEY_FIELD **key_fields,
uint *and_level, table_map usable_tables,
SARGABLE_PARAM **sargables);
SEL_TREE *get_mm_tree(RANGE_OPT_PARAM *param, Item **cond_ptr);
bool walk(Item_processor processor, bool walk_subquery, uchar *arg);
Item *transform(Item_transformer transformer, uchar *arg);
virtual void print(String *str, enum_query_type query_type);