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make it clear for optimizer that XOR's are not optimizable at the moment (BUG#992)

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This commit is contained in:
serg@serg.mylan 2003-08-05 16:29:09 +02:00
parent 5ac7f31b57
commit c0317ce66c
3 changed files with 18 additions and 2 deletions
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5
mysql-test/r/func_test.result
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@ -46,6 +46,11 @@ select 3 ^ 11, 1 ^ 1, 1 ^ 0, 1 ^ NULL, NULL ^ 1;
select 1 XOR 1, 1 XOR 0, 0 XOR 1, 0 XOR 0, NULL XOR 1, 1 XOR NULL, 0 XOR NULL; select 1 XOR 1, 1 XOR 0, 0 XOR 1, 0 XOR 0, NULL XOR 1, 1 XOR NULL, 0 XOR NULL;
1 XOR 1 1 XOR 0 0 XOR 1 0 XOR 0 NULL XOR 1 1 XOR NULL 0 XOR NULL 1 XOR 1 1 XOR 0 0 XOR 1 0 XOR 0 NULL XOR 1 1 XOR NULL 0 XOR NULL
0 1 1 0 NULL NULL NULL 0 1 1 0 NULL NULL NULL
create table t1 (a int);
insert t1 values (1);
select * from t1 where 1 xor 1;
a
drop table t1;
select 5 between 0 and 10 between 0 and 1,(5 between 0 and 10) between 0 and 1; select 5 between 0 and 10 between 0 and 1,(5 between 0 and 10) between 0 and 1;
5 between 0 and 10 between 0 and 1 (5 between 0 and 10) between 0 and 1 5 between 0 and 10 between 0 and 1 (5 between 0 and 10) between 0 and 1
0 1 0 1

5
mysql-test/t/func_test.test
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@ -18,6 +18,11 @@ select -1.49 or -1.49,0.6 or 0.6;
select 3 ^ 11, 1 ^ 1, 1 ^ 0, 1 ^ NULL, NULL ^ 1; select 3 ^ 11, 1 ^ 1, 1 ^ 0, 1 ^ NULL, NULL ^ 1;
select 1 XOR 1, 1 XOR 0, 0 XOR 1, 0 XOR 0, NULL XOR 1, 1 XOR NULL, 0 XOR NULL; select 1 XOR 1, 1 XOR 0, 0 XOR 1, 0 XOR 0, NULL XOR 1, 1 XOR NULL, 0 XOR NULL;
create table t1 (a int);
insert t1 values (1);
select * from t1 where 1 xor 1;
drop table t1;
# #
# Wrong usage of functions # Wrong usage of functions
# #

6
sql/item_cmpfunc.h
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@ -634,12 +634,18 @@ inline Item *and_conds(Item *a,Item *b)
return cond; return cond;
} }
/*
XOR is Item_cond, not an Item_int_func bevause we could like to
optimize (a XOR b) later on. It's low prio, though
*/
class Item_cond_xor :public Item_cond class Item_cond_xor :public Item_cond
{ {
public: public:
Item_cond_xor() :Item_cond() {} Item_cond_xor() :Item_cond() {}
Item_cond_xor(Item *i1,Item *i2) :Item_cond(i1,i2) {} Item_cond_xor(Item *i1,Item *i2) :Item_cond(i1,i2) {}
enum Functype functype() const { return COND_XOR_FUNC; } enum Functype functype() const { return COND_XOR_FUNC; }
/* TODO: remove the next line when implementing XOR optimization */
enum Type type() const { return FUNC_ITEM; }
longlong val_int(); longlong val_int();
const char *func_name() const { return "xor"; } const char *func_name() const { return "xor"; }
}; };