database/mariadb
1
0
Fork 0
mirror of https://github.com/MariaDB/server.git synced 2025-07-30 16:24:05 +03:00
Code Activity

IN subselect with ORDER BY, HAVING & sum functions

Browse Source
This commit is contained in:
bell@sanja.is.com.ua
2002-10-31 02:11:59 +02:00
parent 465664a124
commit 3e8a5e1d34
8 changed files with 58 additions and 19 deletions
Download Patch File Download Diff File Expand all files Collapse all files

11
mysql-test/r/subselect.result
View File

@ -230,4 +230,15 @@ id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY searchconthardwarefr3 index NULL topic 3 NULL 2 Using index
2 SUBSELECT No tables used
3 UNION No tables used
SELECT 1 IN (SELECT 1 FROM searchconthardwarefr3 HAVING a);
Unknown column 'a' in 'having clause'
SELECT * from searchconthardwarefr3 where topic IN (SELECT topic FROM searchconthardwarefr3 GROUP BY date);
topic date pseudo
40143 2002-08-03 joce
43506 2002-10-02 joce
SELECT * from searchconthardwarefr3 where topic IN (SELECT topic FROM searchconthardwarefr3 GROUP BY date HAVING topic < 4100);
topic date pseudo
43506 2002-10-02 joce
SELECT * from searchconthardwarefr3 where topic IN (SELECT SUM(topic) FROM searchconthardwarefr3);
topic date pseudo
drop table searchconthardwarefr3;

5
mysql-test/t/subselect.test
View File

@ -120,4 +120,9 @@ SELECT 1 FROM searchconthardwarefr3 WHERE 1=(SELECT 1 UNION SELECT 1) UNION ALL
-- error 1240
SELECT 1 FROM searchconthardwarefr3 WHERE 1=(SELECT 1 UNION ALL SELECT 1) UNION SELECT 1;
EXPLAIN SELECT 1 FROM searchconthardwarefr3 WHERE 1=(SELECT 1 UNION SELECT 1);
-- error 1054
SELECT 1 IN (SELECT 1 FROM searchconthardwarefr3 HAVING a);
SELECT * from searchconthardwarefr3 where topic IN (SELECT topic FROM searchconthardwarefr3 GROUP BY date);
SELECT * from searchconthardwarefr3 where topic IN (SELECT topic FROM searchconthardwarefr3 GROUP BY date HAVING topic < 4100);
SELECT * from searchconthardwarefr3 where topic IN (SELECT SUM(topic) FROM searchconthardwarefr3);
drop table searchconthardwarefr3;

10
sql/item.h
View File

@ -116,11 +116,10 @@ public:
*/
class Item_outer_select_context_saver :public Item_wrapper
{
Item *item;
public:
Item_outer_select_context_saver(Item *i):
item(i)
Item_outer_select_context_saver(Item *i)
{
item= i;
}
bool fix_fields(THD *, struct st_table_list *, Item ** ref);
};
@ -130,11 +129,10 @@ public:
*/
class Item_asterisk_remover :public Item_wrapper
{
Item *item;
public:
Item_asterisk_remover(Item *i):
item(i)
Item_asterisk_remover(Item *i)
{
item= i;
}
bool fix_fields(THD *, struct st_table_list *, Item ** ref);
};

29
sql/item_subselect.cc
View File

@ -254,15 +254,30 @@ void Item_in_subselect::select_transformer(st_select_lex *select_lex,
}
else
item= (Item*) sl->item_list.pop();
sl->item_list.empty();
sl->item_list.push_back(new Item_int(1));
left_expr= new Item_outer_select_context_saver(left_expr);
item= new Item_asterisk_remover(item);
if (sl->where)
sl->where= new Item_cond_and(sl->where,
new Item_func_eq(item, left_expr));
if (sl->having || sl->with_sum_func || sl->group_list.first)
{
sl->item_list.push_back(item);
item= new Item_ref(sl->item_list.head_ref(), 0, "<result>");
if (sl->having)
sl->having= new Item_cond_and(sl->having,
new Item_func_eq(item, left_expr));
else
sl->having= new Item_func_eq(item, left_expr);
}
else
sl->where= new Item_func_eq(item, left_expr);
{
sl->item_list.empty();
sl->item_list.push_back(new Item_int(1));
item= new Item_asterisk_remover(item);
if (sl->where)
sl->where= new Item_cond_and(sl->where,
new Item_func_eq(item, left_expr));
else
sl->where= new Item_func_eq(item, left_expr);
}
}
DBUG_VOID_RETURN;
}

7
sql/item_sum.cc
View File

@ -23,7 +23,6 @@
#include "mysql_priv.h"
Item_sum::Item_sum(List<Item> &list)
{
arg_count=list.elements;
@ -38,10 +37,14 @@ Item_sum::Item_sum(List<Item> &list)
args[i++]= item;
}
}
with_sum_func=1;
mark_as_sum_func();
list.empty(); // Fields are used
}
void Item_sum::mark_as_sum_func()
{
current_thd->lex.select->with_sum_func= with_sum_func= 1;
}
void Item_sum::make_field(Send_field *tmp_field)
{

11
sql/item_sum.h
View File

@ -34,23 +34,28 @@ public:
uint arg_count;
bool quick_group; /* If incremental update of fields */
Item_sum() : arg_count(0),quick_group(1) { with_sum_func=1; }
Item_sum() : arg_count(0),quick_group(1)
{
mark_as_sum_func();
}
Item_sum(Item *a) :quick_group(1)
{
arg_count=1;
args=tmp_args;
args[0]=a;
with_sum_func = 1;
mark_as_sum_func();
}
Item_sum( Item *a, Item *b ) :quick_group(1)
{
arg_count=2;
args=tmp_args;
args[0]=a; args[1]=b;
with_sum_func=1;
mark_as_sum_func();
}
Item_sum(List<Item> &list);
~Item_sum() { result_field=0; }
inline void mark_as_sum_func();
enum Type type() const { return SUM_FUNC_ITEM; }
virtual enum Sumfunctype sum_func () const=0;
virtual void reset()=0;

3
sql/sql_lex.cc
View File

@ -934,7 +934,8 @@ void st_select_lex_node::init_select()
order_list.first= 0;
order_list.next= (byte**) &order_list.first;
select_limit= HA_POS_ERROR;
offset_limit= 0;
offset_limit= 0;
with_sum_func= 0;
}
void st_select_lex_unit::init_query()

1
sql/sql_lex.h
View File

@ -196,6 +196,7 @@ public:
enum sub_select_type linkage;
SQL_LIST order_list; /* ORDER clause */
ha_rows select_limit, offset_limit; /* LIMIT clause parameters */
bool with_sum_func;
void init_query();
void init_select();
void include_down(st_select_lex_node *upper);