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Merge epotemkin@bk-internal.mysql.com:/home/bk/mysql-5.0-opt

Browse Source 
into  moonbone.local:/mnt/gentoo64/work/27590-bug-5.0-opt-mysql
This commit is contained in:
evgen@moonbone.local
2007-04-27 21:07:05 +04:00
parent f4ec0f1cbe 4747fa0c03
commit 72e53ede3a
15 changed files with 444 additions and 40 deletions
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4
mysql-test/include/ps_conv.inc
View File

@ -1171,7 +1171,7 @@ execute stmt1 using @arg00, @arg00, @arg00, @arg00, @arg00 ;
######## SELECT .. WHERE column(date/time/..)=value(DATETIME/LONGBLOB) ########
set @arg00= CAST('1991-01-01 01:01:01' as datetime) ;
select 'true' as found from t9
where c1= 20 and c13= CAST('1991-01-01 01:01:01' as datetime) and
where c1= 20 and c13= CAST('1991-01-01 00:00:00' as datetime) and
c14= CAST('1991-01-01 01:01:01' as datetime) and
c15= CAST('1991-01-01 01:01:01' as datetime) and
c16= CAST('1991-01-01 01:01:01' as datetime) and
@ -1180,7 +1180,7 @@ select 'true' as found from t9
where c1= 20 and c13= CAST(@arg00 AS DATE) and c14= @arg00 and c15= @arg00 and c16= @arg00
and c17= @arg00 ;
prepare stmt1 from "select 'true' as found from t9
where c1= 20 and c13= CAST('1991-01-01 01:01:01' as datetime) and
where c1= 20 and c13= CAST('1991-01-01 00:00:00' as datetime) and
c14= CAST('1991-01-01 01:01:01' as datetime) and
c15= CAST('1991-01-01 01:01:01' as datetime) and
c16= CAST('1991-01-01 01:01:01' as datetime) and

2
mysql-test/r/distinct.result
View File

@ -633,7 +633,7 @@ EXPLAIN SELECT (SELECT DISTINCT ADDDATE(a,1) FROM t1
WHERE ADDDATE(a,1) = '2002-08-03');
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY NULL NULL NULL NULL NULL NULL NULL No tables used
2 SUBQUERY t1 ALL NULL NULL NULL NULL 2 Using where; Using temporary
2 SUBQUERY t1 ALL NULL NULL NULL NULL 2 Using where
CREATE TABLE t2 (a CHAR(5) CHARACTER SET latin1 COLLATE latin1_general_ci);
INSERT INTO t2 VALUES (0xf6);
INSERT INTO t2 VALUES ('oe');

4
mysql-test/r/ps_2myisam.result
View File

@ -3070,7 +3070,7 @@ found
true
set @arg00= CAST('1991-01-01 01:01:01' as datetime) ;
select 'true' as found from t9
where c1= 20 and c13= CAST('1991-01-01 01:01:01' as datetime) and
where c1= 20 and c13= CAST('1991-01-01 00:00:00' as datetime) and
c14= CAST('1991-01-01 01:01:01' as datetime) and
c15= CAST('1991-01-01 01:01:01' as datetime) and
c16= CAST('1991-01-01 01:01:01' as datetime) and
@ -3083,7 +3083,7 @@ and c17= @arg00 ;
found
true
prepare stmt1 from "select 'true' as found from t9
where c1= 20 and c13= CAST('1991-01-01 01:01:01' as datetime) and
where c1= 20 and c13= CAST('1991-01-01 00:00:00' as datetime) and
c14= CAST('1991-01-01 01:01:01' as datetime) and
c15= CAST('1991-01-01 01:01:01' as datetime) and
c16= CAST('1991-01-01 01:01:01' as datetime) and

4
mysql-test/r/ps_3innodb.result
View File

@ -3053,7 +3053,7 @@ found
true
set @arg00= CAST('1991-01-01 01:01:01' as datetime) ;
select 'true' as found from t9
where c1= 20 and c13= CAST('1991-01-01 01:01:01' as datetime) and
where c1= 20 and c13= CAST('1991-01-01 00:00:00' as datetime) and
c14= CAST('1991-01-01 01:01:01' as datetime) and
c15= CAST('1991-01-01 01:01:01' as datetime) and
c16= CAST('1991-01-01 01:01:01' as datetime) and
@ -3066,7 +3066,7 @@ and c17= @arg00 ;
found
true
prepare stmt1 from "select 'true' as found from t9
where c1= 20 and c13= CAST('1991-01-01 01:01:01' as datetime) and
where c1= 20 and c13= CAST('1991-01-01 00:00:00' as datetime) and
c14= CAST('1991-01-01 01:01:01' as datetime) and
c15= CAST('1991-01-01 01:01:01' as datetime) and
c16= CAST('1991-01-01 01:01:01' as datetime) and

4
mysql-test/r/ps_4heap.result
View File

@ -3054,7 +3054,7 @@ found
true
set @arg00= CAST('1991-01-01 01:01:01' as datetime) ;
select 'true' as found from t9
where c1= 20 and c13= CAST('1991-01-01 01:01:01' as datetime) and
where c1= 20 and c13= CAST('1991-01-01 00:00:00' as datetime) and
c14= CAST('1991-01-01 01:01:01' as datetime) and
c15= CAST('1991-01-01 01:01:01' as datetime) and
c16= CAST('1991-01-01 01:01:01' as datetime) and
@ -3067,7 +3067,7 @@ and c17= @arg00 ;
found
true
prepare stmt1 from "select 'true' as found from t9
where c1= 20 and c13= CAST('1991-01-01 01:01:01' as datetime) and
where c1= 20 and c13= CAST('1991-01-01 00:00:00' as datetime) and
c14= CAST('1991-01-01 01:01:01' as datetime) and
c15= CAST('1991-01-01 01:01:01' as datetime) and
c16= CAST('1991-01-01 01:01:01' as datetime) and

8
mysql-test/r/ps_5merge.result
View File

@ -2990,7 +2990,7 @@ found
true
set @arg00= CAST('1991-01-01 01:01:01' as datetime) ;
select 'true' as found from t9
where c1= 20 and c13= CAST('1991-01-01 01:01:01' as datetime) and
where c1= 20 and c13= CAST('1991-01-01 00:00:00' as datetime) and
c14= CAST('1991-01-01 01:01:01' as datetime) and
c15= CAST('1991-01-01 01:01:01' as datetime) and
c16= CAST('1991-01-01 01:01:01' as datetime) and
@ -3003,7 +3003,7 @@ and c17= @arg00 ;
found
true
prepare stmt1 from "select 'true' as found from t9
where c1= 20 and c13= CAST('1991-01-01 01:01:01' as datetime) and
where c1= 20 and c13= CAST('1991-01-01 00:00:00' as datetime) and
c14= CAST('1991-01-01 01:01:01' as datetime) and
c15= CAST('1991-01-01 01:01:01' as datetime) and
c16= CAST('1991-01-01 01:01:01' as datetime) and
@ -6004,7 +6004,7 @@ found
true
set @arg00= CAST('1991-01-01 01:01:01' as datetime) ;
select 'true' as found from t9
where c1= 20 and c13= CAST('1991-01-01 01:01:01' as datetime) and
where c1= 20 and c13= CAST('1991-01-01 00:00:00' as datetime) and
c14= CAST('1991-01-01 01:01:01' as datetime) and
c15= CAST('1991-01-01 01:01:01' as datetime) and
c16= CAST('1991-01-01 01:01:01' as datetime) and
@ -6017,7 +6017,7 @@ and c17= @arg00 ;
found
true
prepare stmt1 from "select 'true' as found from t9
where c1= 20 and c13= CAST('1991-01-01 01:01:01' as datetime) and
where c1= 20 and c13= CAST('1991-01-01 00:00:00' as datetime) and
c14= CAST('1991-01-01 01:01:01' as datetime) and
c15= CAST('1991-01-01 01:01:01' as datetime) and
c16= CAST('1991-01-01 01:01:01' as datetime) and

4
mysql-test/r/subselect.result
View File

@ -394,13 +394,13 @@ EXPLAIN EXTENDED SELECT DISTINCT date FROM t1 WHERE date='2002-08-03';
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 index NULL PRIMARY 43 NULL 2 Using where; Using index
Warnings:
Note 1003 select distinct `test`.`t1`.`date` AS `date` from `test`.`t1` where (`test`.`t1`.`date` = 20020803)
Note 1003 select distinct `test`.`t1`.`date` AS `date` from `test`.`t1` where (`test`.`t1`.`date` = _latin1'2002-08-03')
EXPLAIN EXTENDED SELECT (SELECT DISTINCT date FROM t1 WHERE date='2002-08-03');
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY NULL NULL NULL NULL NULL NULL NULL No tables used
2 SUBQUERY t1 index NULL PRIMARY 43 NULL 2 Using where; Using index
Warnings:
Note 1003 select (select distinct `test`.`t1`.`date` AS `date` from `test`.`t1` where (`test`.`t1`.`date` = 20020803)) AS `(SELECT DISTINCT date FROM t1 WHERE date='2002-08-03')`
Note 1003 select (select distinct `test`.`t1`.`date` AS `date` from `test`.`t1` where (`test`.`t1`.`date` = _latin1'2002-08-03')) AS `(SELECT DISTINCT date FROM t1 WHERE date='2002-08-03')`
SELECT DISTINCT date FROM t1 WHERE date='2002-08-03';
date
2002-08-03

39
mysql-test/r/type_datetime.result
View File

@ -192,3 +192,42 @@ CAST(CAST('2006-08-10 10:11:12' AS DATETIME) + INTERVAL 14 MICROSECOND AS DECIMA
SELECT CAST(CAST('10:11:12.098700' AS TIME) AS DECIMAL(20,6));
CAST(CAST('10:11:12.098700' AS TIME) AS DECIMAL(20,6))
101112.098700
create table t1 (f1 date, f2 datetime, f3 timestamp);
insert into t1(f1) values(curdate());
select curdate() < now(), f1 < now(), cast(f1 as date) < now() from t1;
curdate() < now() f1 < now() cast(f1 as date) < now()
1 1 1
delete from t1;
insert into t1 values('2001-01-01','2001-01-01 01:01:01','2001-01-01 01:01:01');
insert into t1 values('2001-02-05','2001-02-05 00:00:00','2001-02-05 01:01:01');
insert into t1 values('2001-03-10','2001-03-09 01:01:01','2001-03-10 01:01:01');
insert into t1 values('2001-04-15','2001-04-15 00:00:00','2001-04-15 00:00:00');
insert into t1 values('2001-05-20','2001-05-20 01:01:01','2001-05-20 01:01:01');
select f1, f3 from t1 where f1 >= '2001-02-05 00:00:00' and f3 <= '2001-04-15';
f1 f3
2001-02-05 2001-02-05 01:01:01
2001-03-10 2001-03-10 01:01:01
2001-04-15 2001-04-15 00:00:00
select f1, f3 from t1 where f1 >= '2001-2-5 0:0:0' and f2 <= '2001-4-15';
f1 f3
2001-02-05 2001-02-05 01:01:01
2001-03-10 2001-03-10 01:01:01
2001-04-15 2001-04-15 00:00:00
select f1, f2 from t1 where if(1, f1, 0) >= f2;
f1 f2
2001-02-05 2001-02-05 00:00:00
2001-03-10 2001-03-09 01:01:01
2001-04-15 2001-04-15 00:00:00
select 1 from dual where cast('2001-1-1 2:3:4' as date) = cast('2001-01-01' as datetime);
1
1
select f1, f2, UNIX_TIMESTAMP(f2), UNIX_TIMESTAMP(f1),
f1 > f2, f1 = f2, f1 < f2
from t1;
f1 f2 UNIX_TIMESTAMP(f2) UNIX_TIMESTAMP(f1) f1 > f2 f1 = f2 f1 < f2
2001-01-01 2001-01-01 01:01:01 978300061 978296400 0 0 1
2001-02-05 2001-02-05 00:00:00 981320400 981320400 0 1 0
2001-03-10 2001-03-09 01:01:01 984088861 984171600 1 0 0
2001-04-15 2001-04-15 00:00:00 987282000 987282000 0 1 0
2001-05-20 2001-05-20 01:01:01 990309661 990306000 0 0 1
drop table t1;

20
mysql-test/t/type_datetime.test
View File

@ -141,3 +141,23 @@ SELECT CAST(CAST('2006-08-10 10:11:12' AS DATETIME) AS DECIMAL(20,6));
SELECT CAST(CAST('2006-08-10 10:11:12' AS DATETIME) + INTERVAL 14 MICROSECOND AS DECIMAL(20,6));
SELECT CAST(CAST('10:11:12.098700' AS TIME) AS DECIMAL(20,6));
#
# Bug#27590: Wrong DATE/DATETIME comparison.
#
create table t1 (f1 date, f2 datetime, f3 timestamp);
insert into t1(f1) values(curdate());
select curdate() < now(), f1 < now(), cast(f1 as date) < now() from t1;
delete from t1;
insert into t1 values('2001-01-01','2001-01-01 01:01:01','2001-01-01 01:01:01');
insert into t1 values('2001-02-05','2001-02-05 00:00:00','2001-02-05 01:01:01');
insert into t1 values('2001-03-10','2001-03-09 01:01:01','2001-03-10 01:01:01');
insert into t1 values('2001-04-15','2001-04-15 00:00:00','2001-04-15 00:00:00');
insert into t1 values('2001-05-20','2001-05-20 01:01:01','2001-05-20 01:01:01');
select f1, f3 from t1 where f1 >= '2001-02-05 00:00:00' and f3 <= '2001-04-15';
select f1, f3 from t1 where f1 >= '2001-2-5 0:0:0' and f2 <= '2001-4-15';
select f1, f2 from t1 where if(1, f1, 0) >= f2;
select 1 from dual where cast('2001-1-1 2:3:4' as date) = cast('2001-01-01' as datetime);
select f1, f2, UNIX_TIMESTAMP(f2), UNIX_TIMESTAMP(f1),
f1 > f2, f1 = f2, f1 < f2
from t1;
drop table t1;

23
sql/item.cc
View File

@ -4162,6 +4162,21 @@ enum_field_types Item::field_type() const
}
bool Item::is_datetime()
{
switch (field_type())
{
case MYSQL_TYPE_DATE:
case MYSQL_TYPE_DATETIME:
case MYSQL_TYPE_TIMESTAMP:
return TRUE;
default:
break;
}
return FALSE;
}
/*
Create a field to hold a string value from an item
@ -6142,6 +6157,14 @@ void Item_cache_int::store(Item *item)
}
void Item_cache_int::store(Item *item, longlong val_arg)
{
value= val_arg;
null_value= item->null_value;
unsigned_flag= item->unsigned_flag;
}
String *Item_cache_int::val_str(String *str)
{
DBUG_ASSERT(fixed == 1);

3
sql/item.h
View File

@ -847,6 +847,7 @@ public:
representation is more precise than the string one).
*/
virtual bool result_as_longlong() { return FALSE; }
bool is_datetime();
};
@ -2424,11 +2425,13 @@ public:
Item_cache_int(): Item_cache(), value(0) {}
void store(Item *item);
void store(Item *item, longlong val_arg);
double val_real() { DBUG_ASSERT(fixed == 1); return (double) value; }
longlong val_int() { DBUG_ASSERT(fixed == 1); return value; }
String* val_str(String *str);
my_decimal *val_decimal(my_decimal *);
enum Item_result result_type() const { return INT_RESULT; }
bool result_as_longlong() { return TRUE; }
};

318
sql/item_cmpfunc.cc
View File

@ -380,7 +380,9 @@ void Item_bool_func2::fix_length_and_dec()
if (arg_real_item->type() == FIELD_ITEM)
{
Field *field=((Item_field*) arg_real_item)->field;
if (field->can_be_compared_as_longlong())
if (field->can_be_compared_as_longlong() &&
!(arg_real_item->is_datetime() &&
args[1]->result_type() == STRING_RESULT))
{
if (convert_constant_item(thd, field,&args[1]))
{
@ -395,7 +397,9 @@ void Item_bool_func2::fix_length_and_dec()
if (arg_real_item->type() == FIELD_ITEM)
{
Field *field=((Item_field*) arg_real_item)->field;
if (field->can_be_compared_as_longlong())
if (field->can_be_compared_as_longlong() &&
!(arg_real_item->is_datetime() &&
args[0]->result_type() == STRING_RESULT))
{
if (convert_constant_item(thd, field,&args[0]))
{
@ -514,6 +518,316 @@ int Arg_comparator::set_compare_func(Item_bool_func2 *item, Item_result type)
}
/*
Convert date provided in a string to the int representation.
SYNOPSIS
get_date_from_str()
thd Thread handle
str a string to convert
warn_type type of the timestamp for issuing the warning
warn_name field name for issuing the warning
error_arg [out] TRUE if string isn't a DATETIME or clipping occur
DESCRIPTION
Convert date provided in the string str to the int representation.
if the string contains wrong date or doesn't contain it at all
then the warning is issued and TRUE returned in the error_arg argument.
The warn_type and the warn_name arguments are used as the name and the
type of the field when issuing the warning.
RETURN
converted value.
*/
static ulonglong
get_date_from_str(THD *thd, String *str, timestamp_type warn_type,
char *warn_name, bool *error_arg)
{
ulonglong value;
int error;
MYSQL_TIME l_time;
enum_mysql_timestamp_type ret;
*error_arg= TRUE;
ret= str_to_datetime(str->ptr(), str->length(), &l_time,
(TIME_FUZZY_DATE | MODE_INVALID_DATES |
(thd->variables.sql_mode &
(MODE_NO_ZERO_IN_DATE | MODE_NO_ZERO_DATE))),
&error);
if ((ret == MYSQL_TIMESTAMP_DATETIME || ret == MYSQL_TIMESTAMP_DATE))
{
value= TIME_to_ulonglong_datetime(&l_time);
*error_arg= FALSE;
}
if (error || *error_arg)
{
make_truncated_value_warning(thd, str->ptr(), str->length(), warn_type,
warn_name);
*error_arg= TRUE;
}
return value;
}
/*
Check whether compare_datetime() can be used to compare items.
SYNOPSIS
Arg_comparator::can_compare_as_dates()
a, b [in] items to be compared
const_value [out] converted value of the string constant, if any
DESCRIPTION
Check several cases when the DATE/DATETIME comparator should be used.
The following cases are checked:
1. Both a and b is a DATE/DATETIME field/function returning string or
int result.
2. Only a or b is a DATE/DATETIME field/function returning string or
int result and the other item (b or a) is an item with string result.
If the second item is a constant one then it's checked to be
convertible to the DATE/DATETIME type. If the constant can't be
converted to a DATE/DATETIME then the compare_datetime() comparator
isn't used and the warning about wrong DATE/DATETIME value is issued.
In all other cases (date-[int|real|decimal]/[int|real|decimal]-date)
the comparison is handled by other comparators.
If the datetime comparator can be used and one the operands of the
comparison is a string constant that was successfully converted to a
DATE/DATETIME type then the result of the conversion is returned in the
const_value if it is provided. If there is no constant or
compare_datetime() isn't applicable then the *const_value remains
unchanged.
RETURN
the found type of date comparison
*/
enum Arg_comparator::enum_date_cmp_type
Arg_comparator::can_compare_as_dates(Item *a, Item *b, ulonglong *const_value)
{
enum enum_date_cmp_type cmp_type= CMP_DATE_DFLT;
Item *str_arg= 0, *date_arg= 0;
if (a->type() == Item::ROW_ITEM || b->type() == Item::ROW_ITEM)
return CMP_DATE_DFLT;
if (a->is_datetime())
{
if (b->is_datetime())
cmp_type= CMP_DATE_WITH_DATE;
else if (b->result_type() == STRING_RESULT)
{
cmp_type= CMP_DATE_WITH_STR;
date_arg= a;
str_arg= b;
}
}
else if (b->is_datetime() && a->result_type() == STRING_RESULT)
{
cmp_type= CMP_STR_WITH_DATE;
date_arg= b;
str_arg= a;
}
if (cmp_type != CMP_DATE_DFLT)
{
if (cmp_type != CMP_DATE_WITH_DATE && str_arg->const_item())
{
THD *thd= current_thd;
ulonglong value;
bool error;
String tmp, *str_val= 0;
timestamp_type t_type= (date_arg->field_type() == MYSQL_TYPE_DATE ?
MYSQL_TIMESTAMP_DATE : MYSQL_TIMESTAMP_DATETIME);
str_val= str_arg->val_str(&tmp);
if (str_arg->null_value)
return CMP_DATE_DFLT;
value= get_date_from_str(thd, str_val, t_type, date_arg->name, &error);
if (error)
return CMP_DATE_DFLT;
if (const_value)
*const_value= value;
}
}
return cmp_type;
}
int Arg_comparator::set_cmp_func(Item_bool_func2 *owner_arg,
Item **a1, Item **a2,
Item_result type)
{
enum enum_date_cmp_type cmp_type;
ulonglong const_value;
a= a1;
b= a2;
if ((cmp_type= can_compare_as_dates(*a, *b, &const_value)))
{
thd= current_thd;
owner= owner_arg;
a_type= (*a)->field_type();
b_type= (*b)->field_type();
a_cache= 0;
b_cache= 0;
if (cmp_type != CMP_DATE_WITH_DATE &&
((*b)->const_item() || (*a)->const_item()))
{
Item_cache_int *cache= new Item_cache_int();
/* Mark the cache as non-const to prevent re-caching. */
cache->set_used_tables(1);
if (!(*a)->is_datetime())
{
cache->store((*a), const_value);
a_cache= cache;
a= (Item **)&a_cache;
}
else
{
cache->store((*b), const_value);
b_cache= cache;
b= (Item **)&b_cache;
}
}
is_nulls_eq= owner->functype() == Item_func::EQUAL_FUNC;
func= &Arg_comparator::compare_datetime;
return 0;
}
return set_compare_func(owner_arg, type);
}
/*
Retrieves correct DATETIME value from given item.
SYNOPSIS
get_datetime_value()
thd thread handle
item_arg [in/out] item to retrieve DATETIME value from
cache_arg [in/out] pointer to place to store the caching item to
warn_item [in] item for issuing the conversion warning
is_null [out] TRUE <=> the item_arg is null
DESCRIPTION
Retrieves the correct DATETIME value from given item for comparison by the
compare_datetime() function.
If item's result can be compared as longlong then its int value is used
and its string value is used otherwise. Strings are always parsed and
converted to int values by the get_date_from_str() function.
This allows us to compare correctly string dates with missed insignificant
zeros. If an item is a constant one then its value is cached and it isn't
get parsed again. An Item_cache_int object is used for caching values. It
seamlessly substitutes the original item. The cache item is marked as
non-constant to prevent re-caching it again. In order to compare
correctly DATE and DATETIME items the result of the former are treated as
a DATETIME with zero time (00:00:00).
RETURN
obtained value
*/
static ulonglong
get_datetime_value(THD *thd, Item ***item_arg, Item **cache_arg,
Item *warn_item, bool *is_null)
{
ulonglong value;
String buf, *str= 0;
Item *item= **item_arg;
if (item->result_as_longlong())
{
value= item->val_int();
*is_null= item->null_value;
if (item->field_type() == MYSQL_TYPE_DATE)
value*= 1000000L;
}
else
{
str= item->val_str(&buf);
*is_null= item->null_value;
}
if (*is_null)
return -1;
/*
Convert strings to the integer DATE/DATETIME representation.
Even if both dates provided in strings we can't compare them directly as
strings as there is no warranty that they are correct and do not miss
some insignificant zeros.
*/
if (str)
{
bool error;
enum_field_types f_type= warn_item->field_type();
timestamp_type t_type= f_type ==
MYSQL_TYPE_DATE ? MYSQL_TIMESTAMP_DATE : MYSQL_TIMESTAMP_DATETIME;
value= get_date_from_str(thd, str, t_type, warn_item->name, &error);
}
if (item->const_item())
{
Item_cache_int *cache= new Item_cache_int();
/* Mark the cache as non-const to prevent re-caching. */
cache->set_used_tables(1);
cache->store(item, value);
*cache_arg= cache;
*item_arg= cache_arg;
}
return value;
}
/*
Compare items values as dates.
SYNOPSIS
Arg_comparator::compare_datetime()
DESCRIPTION
Compare items values as DATE/DATETIME for both EQUAL_FUNC and from other
comparison functions. The correct DATETIME values are obtained
with help of the get_datetime_value() function.
RETURN
If is_nulls_eq is TRUE:
1 if items are equal or both are null
0 otherwise
If is_nulls_eq is FALSE:
-1 a < b or one of items is null
0 a == b
1 a > b
*/
int Arg_comparator::compare_datetime()
{
bool is_null= FALSE;
ulonglong a_value, b_value;
/* Get DATE/DATETIME value of the 'a' item. */
a_value= get_datetime_value(thd, &a, &a_cache, *b, &is_null);
if (!is_nulls_eq && is_null)
{
owner->null_value= 1;
return -1;
}
/* Get DATE/DATETIME value of the 'b' item. */
b_value= get_datetime_value(thd, &b, &b_cache, *a, &is_null);
if (is_null)
{
owner->null_value= is_nulls_eq ? 0 : 1;
return is_nulls_eq ? 1 : -1;
}
owner->null_value= 0;
/* Compare values. */
if (is_nulls_eq)
return (a_value == b_value);
return a_value < b_value ? -1 : (a_value > b_value ? 1 : 0);
}
int Arg_comparator::compare_string()
{
String *res1,*res2;

27
sql/item_cmpfunc.h
View File

@ -35,12 +35,19 @@ class Arg_comparator: public Sql_alloc
Item_bool_func2 *owner;
Arg_comparator *comparators; // used only for compare_row()
double precision;
/* Fields used in DATE/DATETIME comparison. */
THD *thd;
enum_field_types a_type, b_type; // Types of a and b items
Item *a_cache, *b_cache; // Cached values of a and b items
bool is_nulls_eq; // TRUE <=> compare for the EQUAL_FUNC
enum enum_date_cmp_type { CMP_DATE_DFLT= 0, CMP_DATE_WITH_DATE,
CMP_DATE_WITH_STR, CMP_STR_WITH_DATE };
public:
DTCollation cmp_collation;
Arg_comparator() {};
Arg_comparator(Item **a1, Item **a2): a(a1), b(a2) {};
Arg_comparator(): thd(0), a_cache(0), b_cache(0) {};
Arg_comparator(Item **a1, Item **a2): a(a1), b(a2), thd(0),
a_cache(0), b_cache(0) {};
int set_compare_func(Item_bool_func2 *owner, Item_result type);
inline int set_compare_func(Item_bool_func2 *owner_arg)
@ -48,14 +55,10 @@ public:
return set_compare_func(owner_arg, item_cmp_type((*a)->result_type(),
(*b)->result_type()));
}
inline int set_cmp_func(Item_bool_func2 *owner_arg,
int set_cmp_func(Item_bool_func2 *owner_arg,
Item **a1, Item **a2,
Item_result type)
{
a= a1;
b= a2;
return set_compare_func(owner_arg, type);
}
Item_result type);
inline int set_cmp_func(Item_bool_func2 *owner_arg,
Item **a1, Item **a2)
{
@ -83,6 +86,10 @@ public:
int compare_e_row(); // compare args[0] & args[1]
int compare_real_fixed();
int compare_e_real_fixed();
int compare_datetime(); // compare args[0] & args[1] as DATETIMEs
static enum enum_date_cmp_type can_compare_as_dates(Item *a, Item *b,
ulonglong *const_val_arg);
static arg_cmp_func comparator_matrix [5][2];

18
sql/sql_select.cc
View File

@ -8667,17 +8667,13 @@ static bool
test_if_equality_guarantees_uniqueness(Item *l, Item *r)
{
return r->const_item() &&
/* elements must be of the same result type */
(r->result_type() == l->result_type() ||
/* or dates compared to longs */
(((l->type() == Item::FIELD_ITEM &&
((Item_field *)l)->field->can_be_compared_as_longlong()) ||
(l->type() == Item::FUNC_ITEM &&
((Item_func *)l)->result_as_longlong())) &&
r->result_type() == INT_RESULT))
/* and must have the same collation if compared as strings */
&& (l->result_type() != STRING_RESULT ||
l->collation.collation == r->collation.collation);
/* elements must be compared as dates */
(Arg_comparator::can_compare_as_dates(l, r, 0) ||
/* or of the same result type */
(r->result_type() == l->result_type() &&
/* and must have the same collation if compared as strings */
(l->result_type() != STRING_RESULT ||
l->collation.collation == r->collation.collation)));
}
/*

6
tests/mysql_client_test.c
View File

@ -8852,12 +8852,14 @@ static void test_ts()
mysql_free_result(prep_res);
mysql_stmt_close(stmt);
char queries [3][60]= {"SELECT a, b, c FROM test_ts WHERE %c=?",
"SELECT a, b, c FROM test_ts WHERE %c=?",
"SELECT a, b, c FROM test_ts WHERE %c=CAST(? AS DATE)"};
for (name= 'a'; field_count--; name++)
{
int row_count= 0;
sprintf(query, "SELECT a, b, c FROM test_ts WHERE %c=?", name);
sprintf(query, queries[field_count], name);
if (!opt_silent)
fprintf(stdout, "\n %s", query);