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reset() split in 2 function clear() & add()

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aggregate function reinitialization (if no rows was found) made with help of clear()
(fixed BUG#860)
This commit is contained in:
bell@laptop.sanja.is.com.ua 2003-08-28 03:10:14 +03:00
parent 42171225eb
commit 3d2a3804a1
7 changed files with 69 additions and 45 deletions
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9
mysql-test/r/subselect.result
View File

@ -1352,3 +1352,12 @@ ERROR HY000: Illegal mix of collations (latin1_german1_ci,IMPLICIT) and (latin1_
select * from t1 where s1 > any (select max(s2) from t1);
ERROR HY000: Illegal mix of collations (latin1_german1_ci,IMPLICIT) and (latin1_swedish_ci,IMPLICIT) for operation '>'
drop table t1;
create table t1(toid int,rd int);
create table t2(userid int,pmnew int,pmtotal int);
insert into t2 values(1,0,0),(2,0,0);
insert into t1 values(1,0),(1,0),(1,0),(1,12),(1,15),(1,123),(1,12312),(1,12312),(1,123),(2,0),(2,0),(2,1),(2,2);
select userid,pmtotal,pmnew, (select count(rd) from t1 where toid=t2.userid) calc_total, (select count(rd) from t1 where rd=0 and toid=t2.userid) calc_new from t2 where userid in (select distinct toid from t1);
userid pmtotal pmnew calc_total calc_new
1 0 0 9 3
2 0 0 4 2
drop table t1, t2;

10
mysql-test/t/subselect.test
View File

@ -912,3 +912,13 @@ select * from t1 where s1 > (select max(s2) from t1);
-- error 1266
select * from t1 where s1 > any (select max(s2) from t1);
drop table t1;
#
# aggregate functions reinitialization
#
create table t1(toid int,rd int);
create table t2(userid int,pmnew int,pmtotal int);
insert into t2 values(1,0,0),(2,0,0);
insert into t1 values(1,0),(1,0),(1,0),(1,12),(1,15),(1,123),(1,12312),(1,12312),(1,123),(2,0),(2,0),(2,1),(2,2);
select userid,pmtotal,pmnew, (select count(rd) from t1 where toid=t2.userid) calc_total, (select count(rd) from t1 where rd=0 and toid=t2.userid) calc_new from t2 where userid in (select distinct toid from t1);
drop table t1, t2;

31
sql/item_sum.cc
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@ -223,10 +223,9 @@ Item *Item_sum_sum::copy_or_same(THD* thd)
}
bool Item_sum_sum::reset()
void Item_sum_sum::clear()
{
null_value=1; sum=0.0;
return Item_sum_sum::add();
}
@ -251,10 +250,9 @@ Item *Item_sum_count::copy_or_same(THD* thd)
}
bool Item_sum_count::reset()
void Item_sum_count::clear()
{
count=0;
return add();
count= 0;
}
@ -286,10 +284,9 @@ Item *Item_sum_avg::copy_or_same(THD* thd)
}
bool Item_sum_avg::reset()
void Item_sum_avg::clear()
{
sum=0.0; count=0;
return Item_sum_avg::add();
}
@ -342,11 +339,10 @@ Item *Item_sum_variance::copy_or_same(THD* thd)
}
bool Item_sum_variance::reset()
void Item_sum_variance::clear()
{
sum=sum_sqr=0.0;
count=0;
return Item_sum_variance::add();
}
bool Item_sum_variance::add()
@ -592,10 +588,9 @@ longlong Item_sum_bit::val_int()
}
bool Item_sum_bit::reset()
void Item_sum_bit::clear()
{
bits=reset_bits;
return add();
bits= reset_bits;
}
Item *Item_sum_or::copy_or_same(THD* thd)
@ -1280,7 +1275,7 @@ Item *Item_sum_count_distinct::copy_or_same(THD* thd)
}
bool Item_sum_count_distinct::reset()
void Item_sum_count_distinct::clear()
{
if (use_tree)
reset_tree(tree);
@ -1290,7 +1285,6 @@ bool Item_sum_count_distinct::reset()
table->file->delete_all_rows();
table->file->extra(HA_EXTRA_WRITE_CACHE);
}
return add();
}
bool Item_sum_count_distinct::add()
@ -1353,11 +1347,11 @@ longlong Item_sum_count_distinct::val_int()
#ifdef HAVE_DLOPEN
bool Item_udf_sum::clear()
void Item_udf_sum::clear()
{
DBUG_ENTER("Item_udf_sum::reset");
DBUG_ENTER("Item_udf_sum::clear");
udf.clear();
DBUG_RETURN(0);
DBUG_VOID_RETURN;
}
bool Item_udf_sum::add()
@ -1685,7 +1679,7 @@ Item *Item_func_group_concat::copy_or_same(THD* thd)
}
bool Item_func_group_concat::reset()
void Item_func_group_concat::clear()
{
result.length(0);
result.copy();
@ -1699,7 +1693,6 @@ bool Item_func_group_concat::reset()
}
if (tree_mode)
reset_tree(tree);
return add();
}

29
sql/item_sum.h
View File

@ -62,7 +62,8 @@ public:
enum Type type() const { return SUM_FUNC_ITEM; }
virtual enum Sumfunctype sum_func () const=0;
virtual bool reset()=0;
inline bool reset() { clear(); return add(); };
virtual void clear()= 0;
virtual bool add()=0;
virtual void reset_field()=0;
virtual void update_field(int offset)=0;
@ -124,7 +125,7 @@ class Item_sum_sum :public Item_sum_num
Item_sum_sum(THD *thd, Item_sum_sum &item)
:Item_sum_num(thd, item), sum(item.sum) {}
enum Sumfunctype sum_func () const {return SUM_FUNC;}
bool reset();
void clear();
bool add();
double val();
void reset_field();
@ -151,7 +152,7 @@ class Item_sum_count :public Item_sum_int
table_map used_tables() const { return used_table_cache; }
bool const_item() const { return !used_table_cache; }
enum Sumfunctype sum_func () const { return COUNT_FUNC; }
bool reset();
void clear();
void no_rows_in_result() { count=0; }
bool add();
void make_const(longlong count_arg) { count=count_arg; used_table_cache=0; }
@ -225,7 +226,7 @@ class Item_sum_count_distinct :public Item_sum_int
table_map used_tables() const { return used_table_cache; }
enum Sumfunctype sum_func () const { return COUNT_DISTINCT_FUNC; }
bool reset();
void clear();
bool add();
longlong val_int();
void reset_field() { return ;} // Never called
@ -269,7 +270,7 @@ class Item_sum_avg :public Item_sum_num
Item_sum_avg(THD *thd, Item_sum_avg &item)
:Item_sum_num(thd, item), sum(item.sum), count(item.count) {}
enum Sumfunctype sum_func () const {return AVG_FUNC;}
bool reset();
void clear();
bool add();
double val();
void reset_field();
@ -322,7 +323,7 @@ class Item_sum_variance : public Item_sum_num
Item_sum_num(thd, item), sum(item.sum), sum_sqr(item.sum_sqr),
count(item.count) {}
enum Sumfunctype sum_func () const { return VARIANCE_FUNC; }
bool reset();
void clear();
bool add();
double val();
void reset_field();
@ -391,13 +392,12 @@ class Item_sum_hybrid :public Item_sum
table_map used_tables() const { return used_table_cache; }
bool const_item() const { return !used_table_cache; }
bool reset()
void clear()
{
sum=0.0;
sum_int=0;
value.length(0);
null_value=1;
return add();
}
double val();
longlong val_int();
@ -451,7 +451,7 @@ class Item_sum_bit :public Item_sum_int
Item_sum_bit(THD *thd, Item_sum_bit &item):
Item_sum_int(thd, item), reset_bits(item.reset_bits), bits(item.bits) {}
enum Sumfunctype sum_func () const {return SUM_BIT_FUNC;}
bool reset();
void clear();
longlong val_int();
void reset_field();
void fix_length_and_dec()
@ -509,8 +509,7 @@ public:
enum Sumfunctype sum_func () const { return UDF_SUM_FUNC; }
virtual bool have_field_update(void) const { return 0; }
bool reset() { return 0; } /* TO BE FIXED */
bool clear();
void clear();
bool add();
void reset_field() {};
void update_field(int offset_arg) {};
@ -592,7 +591,7 @@ class Item_sum_udf_float :public Item_sum_num
~Item_sum_udf_float() {}
enum Sumfunctype sum_func () const { return UDF_SUM_FUNC; }
double val() { return 0.0; }
bool reset() { return 0; }
bool clear() {}
bool add() { return 0; }
void update_field(int offset) {}
};
@ -609,7 +608,7 @@ public:
enum Sumfunctype sum_func () const { return UDF_SUM_FUNC; }
longlong val_int() { return 0; }
double val() { return 0; }
bool reset() { return 0; }
void clear() {}
bool add() { return 0; }
void update_field(int offset) {}
};
@ -629,7 +628,7 @@ public:
enum Item_result result_type () const { return STRING_RESULT; }
void fix_length_and_dec() { maybe_null=1; max_length=0; }
enum Sumfunctype sum_func () const { return UDF_SUM_FUNC; }
bool reset() { return 0; }
void clear() {}
bool add() { return 0; }
void update_field(int offset) {}
};
@ -715,7 +714,7 @@ class Item_func_group_concat : public Item_sum
const char *func_name() const { return "group_concat"; }
enum Type type() const { return SUM_FUNC_ITEM; }
virtual Item_result result_type () const { return STRING_RESULT; }
bool reset();
void clear();
bool add();
void reset_field();
bool fix_fields(THD *, TABLE_LIST *, Item **);

2
sql/item_uniq.h
View File

@ -41,7 +41,7 @@ public:
:Item_sum_num(thd, item) {}
double val() { return 0.0; }
enum Sumfunctype sum_func () const {return UNIQUE_USERS_FUNC;}
bool reset() { return 0;}
void clear() {}
bool add() { return 0; }
void reset_field() {}
void update_field(int offset) {}

32
sql/sql_select.cc
View File

@ -1003,12 +1003,6 @@ JOIN::reinit()
/* Reset of sum functions */
first_record= 0;
if (sum_funcs)
{
Item_sum *func, **func_ptr= sum_funcs;
while ((func= *(func_ptr++)))
func->null_value= 1;
}
if (exec_tmp_table1)
{
@ -5979,8 +5973,7 @@ end_send_group(JOIN *join, JOIN_TAB *join_tab __attribute__((unused)),
if (!join->first_record)
{
/* No matching rows for group function */
clear_tables(join);
copy_fields(&join->tmp_table_param);
join->clear();
}
if (join->having && join->having->val_int() == 0)
error= -1; // Didn't satisfy having
@ -6246,8 +6239,7 @@ end_write_group(JOIN *join, JOIN_TAB *join_tab __attribute__((unused)),
if (!join->first_record)
{
/* No matching rows for group function */
clear_tables(join);
copy_fields(&join->tmp_table_param);
join->clear();
}
copy_sum_funcs(join->sum_funcs);
if (!join->having || join->having->val_int())
@ -8542,6 +8534,26 @@ int JOIN::rollup_send_data(uint idx)
return 0;
}
/*
clear results if there are not rows found for group
(end_send_group/end_write_group)
SYNOPSYS
JOIN::clear()
*/
void JOIN::clear()
{
clear_tables(this);
copy_fields(&tmp_table_param);
if (sum_funcs)
{
Item_sum *func, **func_ptr= sum_funcs;
while ((func= *(func_ptr++)))
func->clear();
}
}
/****************************************************************************
EXPLAIN handling

1
sql/sql_select.h
View File

@ -279,6 +279,7 @@ class JOIN :public Sql_alloc
Item_sum ***func);
int rollup_send_data(uint idx);
bool test_in_subselect(Item **where);
void clear();
};