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igor@rurik.mysql.com 2005-07-28 21:28:20 -07:00
commit 64e53ec5c4
6 changed files with 181 additions and 11 deletions
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31
mysql-test/r/func_gconcat.result
View File

@ -524,3 +524,34 @@ group_concat(a)
ABW
ABW
drop table t1;
CREATE TABLE t1 (
aID smallint(5) unsigned NOT NULL auto_increment,
sometitle varchar(255) NOT NULL default '',
bID smallint(5) unsigned NOT NULL,
PRIMARY KEY (aID),
UNIQUE KEY sometitle (sometitle)
);
INSERT INTO t1 SET sometitle = 'title1', bID = 1;
INSERT INTO t1 SET sometitle = 'title2', bID = 1;
CREATE TABLE t2 (
bID smallint(5) unsigned NOT NULL auto_increment,
somename varchar(255) NOT NULL default '',
PRIMARY KEY (bID),
UNIQUE KEY somename (somename)
);
INSERT INTO t2 SET somename = 'test';
SELECT COUNT(*), GROUP_CONCAT(DISTINCT t2.somename SEPARATOR ' |')
FROM t1 JOIN t2 ON t1.bID = t2.bID;
COUNT(*) GROUP_CONCAT(DISTINCT t2.somename SEPARATOR ' |')
2 test
INSERT INTO t2 SET somename = 'test2';
SELECT COUNT(*), GROUP_CONCAT(DISTINCT t2.somename SEPARATOR ' |')
FROM t1 JOIN t2 ON t1.bID = t2.bID;
COUNT(*) GROUP_CONCAT(DISTINCT t2.somename SEPARATOR ' |')
2 test
DELETE FROM t2 WHERE somename = 'test2';
SELECT COUNT(*), GROUP_CONCAT(DISTINCT t2.somename SEPARATOR ' |')
FROM t1 JOIN t2 ON t1.bID = t2.bID;
COUNT(*) GROUP_CONCAT(DISTINCT t2.somename SEPARATOR ' |')
2 test
DROP TABLE t1,t2;

60
mysql-test/r/null_key.result
View File

@ -369,3 +369,63 @@ select * from t1;
id id2
1 1
drop table t1;
CREATE TABLE t1 (a int);
CREATE TABLE t2 (a int, b int, INDEX idx(a));
CREATE TABLE t3 (b int, INDEX idx(b));
CREATE TABLE t4 (b int, INDEX idx(b));
INSERT INTO t1 VALUES (1), (2), (3), (4);
INSERT INTO t2 VALUES (1, 1), (3, 1);
INSERT INTO t3 VALUES
(NULL), (NULL), (NULL), (NULL), (NULL),
(NULL), (NULL), (NULL), (NULL), (NULL);
INSERT INTO t4 SELECT * FROM t3;
INSERT INTO t3 SELECT * FROM t4;
INSERT INTO t4 SELECT * FROM t3;
INSERT INTO t3 SELECT * FROM t4;
INSERT INTO t4 SELECT * FROM t3;
INSERT INTO t3 SELECT * FROM t4;
INSERT INTO t4 SELECT * FROM t3;
INSERT INTO t3 SELECT * FROM t4;
INSERT INTO t4 SELECT * FROM t3;
INSERT INTO t3 SELECT * FROM t4;
INSERT INTO t4 SELECT * FROM t3;
INSERT INTO t3 SELECT * FROM t4;
INSERT INTO t4 SELECT * FROM t3;
INSERT INTO t3 SELECT * FROM t4;
INSERT INTO t4 SELECT * FROM t3;
INSERT INTO t3 SELECT * FROM t4;
INSERT INTO t3 VALUES (2), (3);
ANALYZE table t1, t2, t3;
Table Op Msg_type Msg_text
test.t1 analyze status OK
test.t2 analyze status OK
test.t3 analyze status OK
SELECT COUNT(*) FROM t3;
COUNT(*)
15972
EXPLAIN SELECT SQL_CALC_FOUND_ROWS * FROM t1 LEFT JOIN t2 ON t1.a=t2.a
LEFT JOIN t3 ON t2.b=t3.b;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 4
1 SIMPLE t2 ref idx idx 5 test.t1.a 1
1 SIMPLE t3 ref idx idx 5 test.t2.b 1 Using index
FLUSH STATUS ;
SELECT SQL_CALC_FOUND_ROWS * FROM t1 LEFT JOIN t2 ON t1.a=t2.a
LEFT JOIN t3 ON t2.b=t3.b;
a a b b
1 1 1 NULL
2 NULL NULL NULL
3 3 1 NULL
4 NULL NULL NULL
SHOW STATUS LIKE "handler_read%";
Variable_name Value
Handler_read_first 0
Handler_read_key 6
Handler_read_next 2
Handler_read_prev 0
Handler_read_rnd 0
Handler_read_rnd_next 5
SELECT FOUND_ROWS();
FOUND_ROWS()
4
DROP TABLE t1,t2,t3,t4;

41
mysql-test/t/func_gconcat.test
View File

@ -310,12 +310,37 @@ select a, group_concat(b order by b) from t1 group by a with rollup;
select a, group_concat(distinct b order by b) from t1 group by a with rollup;
drop table t1;
# End of 4.1 tests
#
# Bug #12095: GROUP_CONCAT for one row table
#
#
# Bug #6475
#
create table t1 (a char(3), b char(20), primary key (a, b));
insert into t1 values ('ABW', 'Dutch'), ('ABW', 'English');
select group_concat(a) from t1 group by b;
drop table t1;
CREATE TABLE t1 (
aID smallint(5) unsigned NOT NULL auto_increment,
sometitle varchar(255) NOT NULL default '',
bID smallint(5) unsigned NOT NULL,
PRIMARY KEY (aID),
UNIQUE KEY sometitle (sometitle)
);
INSERT INTO t1 SET sometitle = 'title1', bID = 1;
INSERT INTO t1 SET sometitle = 'title2', bID = 1;
CREATE TABLE t2 (
bID smallint(5) unsigned NOT NULL auto_increment,
somename varchar(255) NOT NULL default '',
PRIMARY KEY (bID),
UNIQUE KEY somename (somename)
);
INSERT INTO t2 SET somename = 'test';
SELECT COUNT(*), GROUP_CONCAT(DISTINCT t2.somename SEPARATOR ' |')
FROM t1 JOIN t2 ON t1.bID = t2.bID;
INSERT INTO t2 SET somename = 'test2';
SELECT COUNT(*), GROUP_CONCAT(DISTINCT t2.somename SEPARATOR ' |')
FROM t1 JOIN t2 ON t1.bID = t2.bID;
DELETE FROM t2 WHERE somename = 'test2';
SELECT COUNT(*), GROUP_CONCAT(DISTINCT t2.somename SEPARATOR ' |')
FROM t1 JOIN t2 ON t1.bID = t2.bID;
DROP TABLE t1,t2;
# End of 4.1 tests

45
mysql-test/t/null_key.test
View File

@ -194,4 +194,49 @@ delete from t1 where id <=> NULL;
select * from t1;
drop table t1;
#
# Test for bug #12144: optimizations for key access with null keys
# used for outer joins
#
CREATE TABLE t1 (a int);
CREATE TABLE t2 (a int, b int, INDEX idx(a));
CREATE TABLE t3 (b int, INDEX idx(b));
CREATE TABLE t4 (b int, INDEX idx(b));
INSERT INTO t1 VALUES (1), (2), (3), (4);
INSERT INTO t2 VALUES (1, 1), (3, 1);
INSERT INTO t3 VALUES
(NULL), (NULL), (NULL), (NULL), (NULL),
(NULL), (NULL), (NULL), (NULL), (NULL);
INSERT INTO t4 SELECT * FROM t3;
INSERT INTO t3 SELECT * FROM t4;
INSERT INTO t4 SELECT * FROM t3;
INSERT INTO t3 SELECT * FROM t4;
INSERT INTO t4 SELECT * FROM t3;
INSERT INTO t3 SELECT * FROM t4;
INSERT INTO t4 SELECT * FROM t3;
INSERT INTO t3 SELECT * FROM t4;
INSERT INTO t4 SELECT * FROM t3;
INSERT INTO t3 SELECT * FROM t4;
INSERT INTO t4 SELECT * FROM t3;
INSERT INTO t3 SELECT * FROM t4;
INSERT INTO t4 SELECT * FROM t3;
INSERT INTO t3 SELECT * FROM t4;
INSERT INTO t4 SELECT * FROM t3;
INSERT INTO t3 SELECT * FROM t4;
INSERT INTO t3 VALUES (2), (3);
ANALYZE table t1, t2, t3;
SELECT COUNT(*) FROM t3;
EXPLAIN SELECT SQL_CALC_FOUND_ROWS * FROM t1 LEFT JOIN t2 ON t1.a=t2.a
LEFT JOIN t3 ON t2.b=t3.b;
FLUSH STATUS ;
SELECT SQL_CALC_FOUND_ROWS * FROM t1 LEFT JOIN t2 ON t1.a=t2.a
LEFT JOIN t3 ON t2.b=t3.b;
SHOW STATUS LIKE "handler_read%";
SELECT FOUND_ROWS();
DROP TABLE t1,t2,t3,t4;
# End of 4.1 tests

3
sql/sql_class.h
View File

@ -1705,13 +1705,14 @@ public:
bool using_indirect_summary_function;
/* If >0 convert all blob fields to varchar(convert_blob_length) */
uint convert_blob_length;
bool need_const; /* <=> const items are saved in tmp table */
CHARSET_INFO *table_charset;
bool schema_table;
TMP_TABLE_PARAM()
:copy_field(0), group_parts(0),
group_length(0), group_null_parts(0), convert_blob_length(0),
schema_table(0)
need_const(0), schema_table(0)
{}
~TMP_TABLE_PARAM()
{

12
sql/sql_select.cc
View File

@ -2759,7 +2759,9 @@ add_key_field(KEY_FIELD **key_fields,uint and_level, Item_func *cond,
*/
(*key_fields)->null_rejecting= (cond->functype() == Item_func::EQ_FUNC) &&
((*value)->type() == Item::FIELD_ITEM) &&
((Item_field*)*value)->field->maybe_null();
(((Item_field*)*value)->field->maybe_null() ||
((Item_field *)*value)->field->table->maybe_null);
(*key_fields)++;
}
@ -8256,7 +8258,8 @@ create_tmp_table(THD *thd,TMP_TABLE_PARAM *param,List<Item> &fields,
param->using_indirect_summary_function=1;
continue;
}
if (item->const_item() && (int) hidden_field_count <= 0)
if (item->const_item() && (int) hidden_field_count <= 0 &&
!param->need_const)
continue; // We don't have to store this
}
if (type == Item::SUM_FUNC_ITEM && !group && !save_sum_fields)
@ -9857,6 +9860,11 @@ join_read_always_key(JOIN_TAB *tab)
int error;
TABLE *table= tab->table;
for (uint i= 0 ; i < tab->ref.key_parts ; i++)
{
if ((tab->ref.null_rejecting & 1 << i) && tab->ref.items[i]->is_null())
return -1;
}
if (!table->file->inited)
table->file->ha_index_init(tab->ref.key);
if (cp_buffer_from_ref(tab->join->thd, &tab->ref))