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sql/item_timefunc.cc:
  Auto merged
sql/item_timefunc.h:
  Auto merged
This commit is contained in:
unknown 2006-06-17 02:11:12 +04:00
commit d0f39b6aeb
27 changed files with 515 additions and 53 deletions
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7
mysql-test/r/func_concat.result
View file

@ -64,3 +64,10 @@ select 'a' union select concat('a', -0.0);
a
a
good
select concat((select x from (select 'a' as x) as t1 ),
(select y from (select 'b' as y) as t2 )) from (select 1 union select 2 )
as t3;
concat((select x from (select 'a' as x) as t1 ),
(select y from (select 'b' as y) as t2 ))
ab
ab

24
mysql-test/r/func_group.result
View file

@ -916,3 +916,27 @@ select count(*), min(7), max(7) from t2m, t1i;
count(*) min(7) max(7)
0 NULL NULL
drop table t1m, t1i, t2m, t2i;
CREATE TABLE t1 (id int PRIMARY KEY, b char(3), INDEX(b));
INSERT INTO t1 VALUES (1,'xx'), (2,'aa');
SELECT * FROM t1;
id b
1 xx
2 aa
SELECT MAX(b) FROM t1 WHERE b < 'ppppp';
MAX(b)
aa
SHOW WARNINGS;
Level Code Message
SELECT MAX(b) FROM t1 WHERE b < 'pp';
MAX(b)
aa
DROP TABLE t1;
CREATE TABLE t1 (id int PRIMARY KEY, b char(16), INDEX(b(4)));
INSERT INTO t1 VALUES (1, 'xxxxbbbb'), (2, 'xxxxaaaa');
SELECT MAX(b) FROM t1;
MAX(b)
xxxxbbbb
EXPLAIN SELECT MAX(b) FROM t1;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 2
DROP TABLE t1;

21
mysql-test/r/func_in.result
View file

@ -202,3 +202,24 @@ select count(*) from t1 where id not in (1,2);
count(*)
1
drop table t1;
create table t1 (f1 char(1), f2 int);
insert into t1 values (1,0),('a',1),('z',2);
select f1 from t1 where f1 in (1,'z');
f1
1
z
select f2 from t1 where f2 in (1,'z');
f2
0
1
select f1 from t1 where 'z' in (1,f1);
f1
z
select * from t1 where 'z' in (f2,f1);
f1 f2
z 2
select * from t1 where 1 in (f2,f1);
f1 f2
1 0
a 1
drop table t1;

15
mysql-test/r/func_str.result
View file

@ -1006,4 +1006,19 @@ NULL
select ifnull(load_file("lkjlkj"),"it's null");
ifnull(load_file("lkjlkj"),"it's null")
it's null
create table t1 (f1 varchar(4), f2 varchar(64), unique key k1 (f1,f2));
insert into t1 values ( 'test',md5('test')), ('test', sha('test'));
select * from t1 where f1='test' and (f2= md5("test") or f2= md5("TEST"));
f1 f2
test 098f6bcd4621d373cade4e832627b4f6
select * from t1 where f1='test' and (f2= md5("TEST") or f2= md5("test"));
f1 f2
test 098f6bcd4621d373cade4e832627b4f6
select * from t1 where f1='test' and (f2= sha("test") or f2= sha("TEST"));
f1 f2
test a94a8fe5ccb19ba61c4c0873d391e987982fbbd3
select * from t1 where f1='test' and (f2= sha("TEST") or f2= sha("test"));
f1 f2
test a94a8fe5ccb19ba61c4c0873d391e987982fbbd3
drop table t1;
End of 4.1 tests

41
mysql-test/r/func_time.result
View file

@ -630,6 +630,47 @@ select monthname(str_to_date(null, '%m')), monthname(str_to_date(null, '%m')),
monthname(str_to_date(1, '%m')), monthname(str_to_date(0, '%m'));
monthname(str_to_date(null, '%m')) monthname(str_to_date(null, '%m')) monthname(str_to_date(1, '%m')) monthname(str_to_date(0, '%m'))
NULL NULL January NULL
create table t1(f1 date, f2 time, f3 datetime);
insert into t1 values ("2006-01-01", "12:01:01", "2006-01-01 12:01:01");
insert into t1 values ("2006-01-02", "12:01:02", "2006-01-02 12:01:02");
select f1 from t1 where f1 between "2006-1-1" and 20060101;
f1
2006-01-01
select f1 from t1 where f1 between "2006-1-1" and "2006.1.1";
f1
2006-01-01
select f1 from t1 where date(f1) between "2006-1-1" and "2006.1.1";
f1
2006-01-01
select f2 from t1 where f2 between "12:1:2" and "12:2:2";
f2
12:01:02
select f2 from t1 where time(f2) between "12:1:2" and "12:2:2";
f2
12:01:02
select f3 from t1 where f3 between "2006-1-1 12:1:1" and "2006-1-1 12:1:2";
f3
2006-01-01 12:01:01
select f3 from t1 where timestamp(f3) between "2006-1-1 12:1:1" and "2006-1-1 12:1:2";
f3
2006-01-01 12:01:01
select f1 from t1 where "2006-1-1" between f1 and f3;
f1
2006-01-01
select f1 from t1 where "2006-1-1" between date(f1) and date(f3);
f1
2006-01-01
select f1 from t1 where "2006-1-1" between f1 and 'zzz';
f1
Warnings:
Warning 1292 Truncated incorrect date value: 'zzz'
select f1 from t1 where makedate(2006,1) between date(f1) and date(f3);
f1
2006-01-01
select f1 from t1 where makedate(2006,2) between date(f1) and date(f3);
f1
2006-01-02
drop table t1;
select now() - now() + 0, curtime() - curtime() + 0,
sec_to_time(1) + 0, from_unixtime(1) + 0;
now() - now() + 0 curtime() - curtime() + 0 sec_to_time(1) + 0 from_unixtime(1) + 0

5
mysql-test/r/multi_update.result
View file

@ -475,3 +475,8 @@ aclid bigint, index idx_acl(aclid)
insert into t2 values(1,null);
delete t2, t1 from t2 left join t1 on (t2.aclid=t1.aclid) where t2.refid='1';
drop table t1, t2;
create table t1(a int);
create table t2(a int);
delete from t1,t2 using t1,t2 where t1.a=(select a from t1);
ERROR HY000: You can't specify target table 't1' for update in FROM clause
drop table t1, t2;

14
mysql-test/r/select.result
View file

@ -2714,6 +2714,20 @@ select * from t1 where f1 in (select f3 from t2 where (f3,f4)= (select f3,f4 fro
f1 f2
1 1
drop table t1,t2;
CREATE TABLE t1(a int, b int, c int, KEY b(b), KEY c(c));
insert into t1 values (1,0,0),(2,0,0);
CREATE TABLE t2 (a int, b varchar(2), c varchar(2), PRIMARY KEY(a));
insert into t2 values (1,'',''), (2,'','');
CREATE TABLE t3 (a int, b int, PRIMARY KEY (a,b), KEY a (a), KEY b (b));
insert into t3 values (1,1),(1,2);
explain select straight_join DISTINCT t2.a,t2.b, t1.c from t1, t3, t2
where (t1.c=t2.a or (t1.c=t3.a and t2.a=t3.b)) and t1.b=556476786 and
t2.b like '%%' order by t2.b limit 0,1;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ref b,c b 5 const 1 Using where; Using temporary; Using filesort
1 SIMPLE t3 index PRIMARY,a,b PRIMARY 8 NULL 2 Using index
1 SIMPLE t2 ALL PRIMARY NULL NULL NULL 2 Range checked for each record (index map: 0x1)
DROP TABLE t1,t2,t3;
CREATE TABLE t1 (a int, INDEX idx(a));
INSERT INTO t1 VALUES (2), (3), (1);
EXPLAIN SELECT * FROM t1 IGNORE INDEX (idx);

7
mysql-test/t/func_concat.test
View file

@ -50,4 +50,11 @@ select 'a' union select concat('a', -0);
--replace_result 'a-0.0' good 'a0.0' good
select 'a' union select concat('a', -0.0);
#
# Bug#16716: subselect in concat() may lead to a wrong result
#
select concat((select x from (select 'a' as x) as t1 ),
(select y from (select 'b' as y) as t2 )) from (select 1 union select 2 )
as t3;
# End of 4.1 tests

19
mysql-test/t/func_group.test
View file

@ -598,4 +598,23 @@ select count(*), min(7), max(7) from t2m, t1i;
drop table t1m, t1i, t2m, t2i;
#
# Bug #18206: min/max optimization cannot be applied to partial index
#
CREATE TABLE t1 (id int PRIMARY KEY, b char(3), INDEX(b));
INSERT INTO t1 VALUES (1,'xx'), (2,'aa');
SELECT * FROM t1;
SELECT MAX(b) FROM t1 WHERE b < 'ppppp';
SHOW WARNINGS;
SELECT MAX(b) FROM t1 WHERE b < 'pp';
DROP TABLE t1;
CREATE TABLE t1 (id int PRIMARY KEY, b char(16), INDEX(b(4)));
INSERT INTO t1 VALUES (1, 'xxxxbbbb'), (2, 'xxxxaaaa');
SELECT MAX(b) FROM t1;
EXPLAIN SELECT MAX(b) FROM t1;
DROP TABLE t1;
# End of 4.1 tests

12
mysql-test/t/func_in.test
View file

@ -109,4 +109,16 @@ select count(*) from t1 where id not in (1);
select count(*) from t1 where id not in (1,2);
drop table t1;
#
# Bug#18360 Incorrect type coercion in IN() results in false comparison
#
create table t1 (f1 char(1), f2 int);
insert into t1 values (1,0),('a',1),('z',2);
select f1 from t1 where f1 in (1,'z');
select f2 from t1 where f2 in (1,'z');
select f1 from t1 where 'z' in (1,f1);
select * from t1 where 'z' in (f2,f1);
select * from t1 where 1 in (f2,f1);
drop table t1;
# End of 4.1 tests

12
mysql-test/t/func_str.test
View file

@ -669,4 +669,16 @@ drop table t1;
select load_file("lkjlkj");
select ifnull(load_file("lkjlkj"),"it's null");
#
# Bug#15351: Wrong collation used for comparison of md5() and sha()
# parameter can lead to a wrong result.
#
create table t1 (f1 varchar(4), f2 varchar(64), unique key k1 (f1,f2));
insert into t1 values ( 'test',md5('test')), ('test', sha('test'));
select * from t1 where f1='test' and (f2= md5("test") or f2= md5("TEST"));
select * from t1 where f1='test' and (f2= md5("TEST") or f2= md5("test"));
select * from t1 where f1='test' and (f2= sha("test") or f2= sha("TEST"));
select * from t1 where f1='test' and (f2= sha("TEST") or f2= sha("test"));
drop table t1;
--echo End of 4.1 tests

21
mysql-test/t/func_time.test
View file

@ -322,6 +322,27 @@ select last_day('2005-01-00');
select monthname(str_to_date(null, '%m')), monthname(str_to_date(null, '%m')),
monthname(str_to_date(1, '%m')), monthname(str_to_date(0, '%m'));
#
# Bug#16377 result of DATE/TIME functions were compared as strings which
# can lead to a wrong result.
#
create table t1(f1 date, f2 time, f3 datetime);
insert into t1 values ("2006-01-01", "12:01:01", "2006-01-01 12:01:01");
insert into t1 values ("2006-01-02", "12:01:02", "2006-01-02 12:01:02");
select f1 from t1 where f1 between "2006-1-1" and 20060101;
select f1 from t1 where f1 between "2006-1-1" and "2006.1.1";
select f1 from t1 where date(f1) between "2006-1-1" and "2006.1.1";
select f2 from t1 where f2 between "12:1:2" and "12:2:2";
select f2 from t1 where time(f2) between "12:1:2" and "12:2:2";
select f3 from t1 where f3 between "2006-1-1 12:1:1" and "2006-1-1 12:1:2";
select f3 from t1 where timestamp(f3) between "2006-1-1 12:1:1" and "2006-1-1 12:1:2";
select f1 from t1 where "2006-1-1" between f1 and f3;
select f1 from t1 where "2006-1-1" between date(f1) and date(f3);
select f1 from t1 where "2006-1-1" between f1 and 'zzz';
select f1 from t1 where makedate(2006,1) between date(f1) and date(f3);
select f1 from t1 where makedate(2006,2) between date(f1) and date(f3);
drop table t1;
#
# Bug #16546
#

8
mysql-test/t/multi_update.test
View file

@ -448,4 +448,12 @@ insert into t2 values(1,null);
delete t2, t1 from t2 left join t1 on (t2.aclid=t1.aclid) where t2.refid='1';
drop table t1, t2;
#
# Bug#19225: unchecked error leads to server crash
#
create table t1(a int);
create table t2(a int);
--error 1093
delete from t1,t2 using t1,t2 where t1.a=(select a from t1);
drop table t1, t2;
# End of 4.1 tests

15
mysql-test/t/select.test
View file

@ -2248,6 +2248,21 @@ insert into t2 values(1,1);
select * from t1 where f1 in (select f3 from t2 where (f3,f4)= (select f3,f4 from t2));
drop table t1,t2;
#
# Bug #4981: 4.x and 5.x produce non-optimal execution path, 3.23 regression test failure
#
CREATE TABLE t1(a int, b int, c int, KEY b(b), KEY c(c));
insert into t1 values (1,0,0),(2,0,0);
CREATE TABLE t2 (a int, b varchar(2), c varchar(2), PRIMARY KEY(a));
insert into t2 values (1,'',''), (2,'','');
CREATE TABLE t3 (a int, b int, PRIMARY KEY (a,b), KEY a (a), KEY b (b));
insert into t3 values (1,1),(1,2);
# must have "range checked" for t2
explain select straight_join DISTINCT t2.a,t2.b, t1.c from t1, t3, t2
where (t1.c=t2.a or (t1.c=t3.a and t2.a=t3.b)) and t1.b=556476786 and
t2.b like '%%' order by t2.b limit 0,1;
DROP TABLE t1,t2,t3;
#
# Bug #17873: confusing error message when IGNORE INDEX refers a column name
#

16
sql/field.cc
View file

@ -6841,7 +6841,11 @@ create_field::create_field(Field *old_field,Field *orig_field)
bool
Field::set_warning(const uint level, const uint code, int cuted_increment)
{
THD *thd= table->in_use;
/*
If this field was created only for type conversion purposes it
will have table == NULL.
*/
THD *thd= table ? table->in_use : current_thd;
if (thd->count_cuted_fields)
{
thd->cuted_fields+= cuted_increment;
@ -6876,7 +6880,8 @@ Field::set_datetime_warning(const uint level, const uint code,
timestamp_type ts_type, int cuted_increment)
{
if (set_warning(level, code, cuted_increment))
make_truncated_value_warning(table->in_use, str, str_length, ts_type);
make_truncated_value_warning(table ? table->in_use : current_thd,
str, str_length, ts_type);
}
@ -6905,8 +6910,8 @@ Field::set_datetime_warning(const uint level, const uint code,
{
char str_nr[22];
char *str_end= longlong10_to_str(nr, str_nr, -10);
make_truncated_value_warning(table->in_use, str_nr, str_end - str_nr,
ts_type);
make_truncated_value_warning(table ? table->in_use : current_thd,
str_nr, str_end - str_nr, ts_type);
}
}
@ -6935,7 +6940,8 @@ Field::set_datetime_warning(const uint level, const uint code,
/* DBL_DIG is enough to print '-[digits].E+###' */
char str_nr[DBL_DIG + 8];
uint str_len= my_sprintf(str_nr, (str_nr, "%g", nr));
make_truncated_value_warning(table->in_use, str_nr, str_len, ts_type);
make_truncated_value_warning(table ? table->in_use : current_thd,
str_nr, str_len, ts_type);
}
}

16
sql/item.h
View file

@ -327,6 +327,14 @@ public:
cleanup();
delete this;
}
/*
result_as_longlong() must return TRUE for Items representing DATE/TIME
functions and DATE/TIME table fields.
Those Items have result_type()==STRING_RESULT (and not INT_RESULT), but
their values should be compared as integers (because the integer
representation is more precise than the string one).
*/
virtual bool result_as_longlong() { return FALSE; }
};
@ -450,6 +458,10 @@ public:
Item *get_tmp_table_item(THD *thd);
void cleanup();
inline uint32 max_disp_length() { return field->max_length(); }
bool result_as_longlong()
{
return field->can_be_compared_as_longlong();
}
friend class Item_default_value;
friend class Item_insert_value;
friend class st_select_lex_unit;
@ -973,6 +985,10 @@ public:
}
Item *real_item() { return *ref; }
void print(String *str);
bool result_as_longlong()
{
return (*ref)->result_as_longlong();
}
};

175
sql/item_cmpfunc.cc
View file

@ -25,6 +25,8 @@
#include <m_ctype.h>
#include "sql_select.h"
static bool convert_constant_item(THD *thd, Field *field, Item **item);
static Item_result item_store_type(Item_result a,Item_result b)
{
if (a == STRING_RESULT || b == STRING_RESULT)
@ -58,12 +60,145 @@ static void agg_result_type(Item_result *type, Item **items, uint nitems)
}
}
static void agg_cmp_type(Item_result *type, Item **items, uint nitems)
/*
Aggregates result types from the array of items.
SYNOPSIS:
agg_cmp_type()
thd thread handle
type [out] the aggregated type
items array of items to aggregate the type from
nitems number of items in the array
DESCRIPTION
This function aggregates result types from the array of items. Found type
supposed to be used later for comparison of values of these items.
Aggregation itself is performed by the item_cmp_type() function.
NOTES
Aggregation rules:
If all items are constants the type will be aggregated from all items.
If there are some non-constant items then only types of non-constant
items will be used for aggregation.
If there are DATE/TIME fields/functions in the list and no string
fields/functions in the list then:
The INT_RESULT type will be used for aggregation instead of original
result type of any DATE/TIME field/function in the list
All constant items in the list will be converted to a DATE/TIME using
found field or result field of found function.
Implementation notes:
The code is equivalent to:
1. Check the list for presence of a STRING field/function.
Collect the is_const flag.
2. Get a Field* object to use for type coercion
3. Perform type conversion.
1 and 2 are implemented in 2 loops. The first searches for a DATE/TIME
field/function and checks presence of a STRING field/function.
The second loop works only if a DATE/TIME field/function is found.
It checks presence of a STRING field/function in the rest of the list.
TODO
1) The current implementation can produce false comparison results for
expressions like:
date_time_field BETWEEN string_field_with_dates AND string_constant
if the string_constant will omit some of leading zeroes.
In order to fully implement correct comparison of DATE/TIME the new
DATETIME_RESULT result type should be introduced and agg_cmp_type()
should return the DATE/TIME field used for the conversion. Later
this field can be used by comparison functions like Item_func_between to
convert string values to ints on the fly and thus return correct results.
This modification will affect functions BETWEEN, IN and CASE.
2) If in the list a DATE field/function and a DATETIME field/function
are present in the list then the first found field/function will be
used for conversion. This may lead to wrong results and probably should
be fixed.
*/
static void agg_cmp_type(THD *thd, Item_result *type, Item **items, uint nitems)
{
uint i;
type[0]= items[0]->result_type();
for (i=1 ; i < nitems ; i++)
type[0]= item_cmp_type(type[0], items[i]->result_type());
Item::Type res= (Item::Type)0;
/* Used only for date/time fields, max_length = 19 */
char buff[20];
uchar null_byte;
Field *field= NULL;
/* Search for date/time fields/functions */
for (i= 0; i < nitems; i++)
{
if (!items[i]->result_as_longlong())
{
/* Do not convert anything if a string field/function is present */
if (!items[i]->const_item() && items[i]->result_type() == STRING_RESULT)
{
i= nitems;
break;
}
continue;
}
if ((res= items[i]->real_item()->type()) == Item::FIELD_ITEM)
{
field= ((Item_field *)items[i]->real_item())->field;
break;
}
else if (res == Item::FUNC_ITEM)
{
field= items[i]->tmp_table_field_from_field_type(0);
if (field)
field->move_field(buff, &null_byte, 0);
break;
}
}
if (field)
{
/* Check the rest of the list for presence of a string field/function. */
for (i++ ; i < nitems; i++)
{
if (!items[i]->const_item() && items[i]->result_type() == STRING_RESULT &&
!items[i]->result_as_longlong())
{
if (res == Item::FUNC_ITEM)
delete field;
field= 0;
break;
}
}
}
/* Reset to 0 on first occurence of non-const item. 1 otherwise */
bool is_const= items[0]->const_item();
/*
If the first item is a date/time function then its result should be
compared as int
*/
if (field)
{
/* Suppose we are comparing dates and some non-constant items are present. */
type[0]= INT_RESULT;
is_const= 0;
}
else
type[0]= items[0]->result_type();
for (i= 0; i < nitems ; i++)
{
if (!items[i]->const_item())
{
Item_result result= field && items[i]->result_as_longlong() ?
INT_RESULT : items[i]->result_type();
type[0]= is_const ? result : item_cmp_type(type[0], result);
is_const= 0;
}
else if (is_const)
type[0]= item_cmp_type(type[0], items[i]->result_type());
else if (field)
convert_constant_item(thd, field, &items[i]);
}
if (res == Item::FUNC_ITEM && field)
delete field;
}
static void my_coll_agg_error(DTCollation &c1, DTCollation &c2,
@ -896,31 +1031,9 @@ void Item_func_between::fix_length_and_dec()
*/
if (!args[0] || !args[1] || !args[2])
return;
agg_cmp_type(&cmp_type, args, 3);
if (cmp_type == STRING_RESULT &&
agg_arg_charsets(cmp_collation, args, 3, MY_COLL_CMP_CONV))
return;
/*
Make a special case of compare with date/time and longlong fields.
They are compared as integers, so for const item this time-consuming
conversion can be done only once, not for every single comparison
*/
if (args[0]->type() == FIELD_ITEM)
{
Field *field=((Item_field*) args[0])->field;
if (field->can_be_compared_as_longlong())
{
/*
The following can't be recoded with || as convert_constant_item
changes the argument
*/
if (convert_constant_item(thd, field,&args[1]))
cmp_type=INT_RESULT; // Works for all types.
if (convert_constant_item(thd, field,&args[2]))
cmp_type=INT_RESULT; // Works for all types.
}
}
agg_cmp_type(thd, &cmp_type, args, 3);
if (cmp_type == STRING_RESULT)
agg_arg_charsets(cmp_collation, args, 3, MY_COLL_CMP_CONV);
}
@ -1444,7 +1557,7 @@ void Item_func_case::fix_length_and_dec()
for (nagg= 0; nagg < ncases/2 ; nagg++)
agg[nagg+1]= args[nagg*2];
nagg++;
agg_cmp_type(&cmp_type, agg, nagg);
agg_cmp_type(current_thd, &cmp_type, agg, nagg);
if ((cmp_type == STRING_RESULT) &&
agg_arg_charsets(cmp_collation, agg, nagg, MY_COLL_CMP_CONV))
return;
@ -1925,7 +2038,7 @@ void Item_func_in::fix_length_and_dec()
uint const_itm= 1;
THD *thd= current_thd;
agg_cmp_type(&cmp_type, args, arg_count);
agg_cmp_type(thd, &cmp_type, args, arg_count);
if (cmp_type == STRING_RESULT &&
agg_arg_charsets(cmp_collation, args, arg_count, MY_COLL_CMP_CONV))

7
sql/item_cmpfunc.h
View file

@ -44,7 +44,7 @@ public:
inline int set_compare_func(Item_bool_func2 *owner_arg)
{
return set_compare_func(owner_arg, item_cmp_type((*a)->result_type(),
(*b)->result_type()));
(*b)->result_type()));
}
inline int set_cmp_func(Item_bool_func2 *owner_arg,
Item **a1, Item **a2,
@ -57,8 +57,9 @@ public:
inline int set_cmp_func(Item_bool_func2 *owner_arg,
Item **a1, Item **a2)
{
return set_cmp_func(owner_arg, a1, a2, item_cmp_type((*a1)->result_type(),
(*a2)->result_type()));
return set_cmp_func(owner_arg, a1, a2,
item_cmp_type((*a1)->result_type(),
(*a2)->result_type()));
}
inline int compare() { return (this->*func)(); }

26
sql/item_strfunc.cc
View file

@ -118,7 +118,15 @@ String *Item_func_md5::val_str(String *str)
void Item_func_md5::fix_length_and_dec()
{
max_length=32;
max_length=32;
/*
The MD5() function treats its parameter as being a case sensitive. Thus
we set binary collation on it so different instances of MD5() will be
compared properly.
*/
args[0]->collation.set(
get_charset_by_csname(args[0]->collation.collation->csname,
MY_CS_BINSORT,MYF(0)), DERIVATION_COERCIBLE);
}
@ -159,7 +167,15 @@ String *Item_func_sha::val_str(String *str)
void Item_func_sha::fix_length_and_dec()
{
max_length=SHA1_HASH_SIZE*2; // size of hex representation of hash
max_length=SHA1_HASH_SIZE*2; // size of hex representation of hash
/*
The SHA() function treats its parameter as being a case sensitive. Thus
we set binary collation on it so different instances of MD5() will be
compared properly.
*/
args[0]->collation.set(
get_charset_by_csname(args[0]->collation.collation->csname,
MY_CS_BINSORT,MYF(0)), DERIVATION_COERCIBLE);
}
@ -252,11 +268,14 @@ String *Item_func_concat::val_str(String *str)
DBUG_ASSERT(fixed == 1);
String *res,*res2,*use_as_buff;
uint i;
bool is_const= 0;
null_value=0;
if (!(res=args[0]->val_str(str)))
goto null;
use_as_buff= &tmp_value;
/* Item_subselect in --ps-protocol mode will state it as a non-const */
is_const= args[0]->const_item() || !args[0]->used_tables();
for (i=1 ; i < arg_count ; i++)
{
if (res->length() == 0)
@ -279,7 +298,7 @@ String *Item_func_concat::val_str(String *str)
current_thd->variables.max_allowed_packet);
goto null;
}
if (res->alloced_length() >= res->length()+res2->length())
if (!is_const && res->alloced_length() >= res->length()+res2->length())
{ // Use old buffer
res->append(*res2);
}
@ -334,6 +353,7 @@ String *Item_func_concat::val_str(String *str)
res= &tmp_value;
use_as_buff=str;
}
is_const= 0;
}
}
res->set_charset(collation.collation);

60
sql/item_timefunc.cc
View file

@ -2306,6 +2306,20 @@ String *Item_datetime_typecast::val_str(String *str)
}
longlong Item_datetime_typecast::val_int()
{
DBUG_ASSERT(fixed == 1);
TIME ltime;
if (get_arg0_date(&ltime,1))
{
null_value= 1;
return 0;
}
return TIME_to_ulonglong_datetime(&ltime);
}
bool Item_time_typecast::get_time(TIME *ltime)
{
bool res= get_arg0_time(ltime);
@ -2320,6 +2334,17 @@ bool Item_time_typecast::get_time(TIME *ltime)
}
longlong Item_time_typecast::val_int()
{
TIME ltime;
if (get_time(&ltime))
{
null_value= 1;
return 0;
}
return ltime.hour * 10000L + ltime.minute * 100 + ltime.second;
}
String *Item_time_typecast::val_str(String *str)
{
DBUG_ASSERT(fixed == 1);
@ -2359,6 +2384,14 @@ String *Item_date_typecast::val_str(String *str)
return 0;
}
longlong Item_date_typecast::val_int()
{
DBUG_ASSERT(fixed == 1);
TIME ltime;
if (args[0]->get_date(&ltime, TIME_FUZZY_DATE))
return 0;
return (longlong) (ltime.year * 10000L + ltime.month * 100 + ltime.day);
}
/*
MAKEDATE(a,b) is a date function that creates a date value
@ -2395,6 +2428,33 @@ err:
}
longlong Item_func_makedate::val_int()
{
DBUG_ASSERT(fixed == 1);
TIME l_time;
long daynr= (long) args[1]->val_int();
long yearnr= (long) args[0]->val_int();
long days;
if (args[0]->null_value || args[1]->null_value ||
yearnr < 0 || daynr <= 0)
goto err;
days= calc_daynr(yearnr,1,1) + daynr - 1;
/* Day number from year 0 to 9999-12-31 */
if (days >= 0 && days < MAX_DAY_NUMBER)
{
null_value=0;
get_date_from_daynr(days,&l_time.year,&l_time.month,&l_time.day);
return (longlong) (l_time.year * 10000L + l_time.month * 100 + l_time.day);
}
err:
null_value= 1;
return 0;
}
void Item_func_add_time::fix_length_and_dec()
{
enum_field_types arg0_field_type;

12
sql/item_timefunc.h
View file

@ -339,6 +339,7 @@ public:
{
return (new Field_date(maybe_null, name, t_arg, &my_charset_bin));
}
bool result_as_longlong() { return TRUE; }
};
@ -354,6 +355,7 @@ public:
{
return (new Field_datetime(maybe_null, name, t_arg, &my_charset_bin));
}
bool result_as_longlong() { return TRUE; }
};
@ -383,6 +385,7 @@ public:
TIME representation using UTC-SYSTEM or per-thread time zone.
*/
virtual void store_now_in_TIME(TIME *now_time)=0;
bool result_as_longlong() { return TRUE; }
};
@ -589,6 +592,7 @@ public:
{
return (new Field_time(maybe_null, name, t_arg, &my_charset_bin));
}
bool result_as_longlong() { return TRUE; }
};
/*
@ -716,6 +720,8 @@ public:
max_length= 10;
maybe_null= 1;
}
bool result_as_longlong() { return TRUE; }
longlong val_int();
};
@ -732,6 +738,8 @@ public:
{
return (new Field_time(maybe_null, name, t_arg, &my_charset_bin));
}
bool result_as_longlong() { return TRUE; }
longlong val_int();
};
@ -747,6 +755,8 @@ public:
{
return (new Field_datetime(maybe_null, name, t_arg, &my_charset_bin));
}
bool result_as_longlong() { return TRUE; }
longlong val_int();
};
class Item_func_makedate :public Item_str_func
@ -765,6 +775,8 @@ public:
{
return (new Field_date(maybe_null, name, t_arg, &my_charset_bin));
}
bool result_as_longlong() { return TRUE; }
longlong val_int();
};

2
sql/opt_range.cc
View file

@ -64,7 +64,7 @@ public:
uint8 min_flag, uint8 max_flag, uint8 maybe_flag);
SEL_ARG(enum Type type_arg)
:elements(1),use_count(1),left(0),next_key_part(0),color(BLACK),
type(type_arg)
type(type_arg),min_flag(0)
{}
inline bool is_same(SEL_ARG *arg)
{

13
sql/opt_sum.cc
View file

@ -582,7 +582,8 @@ static bool matching_cond(bool max_fl, TABLE_REF *ref, KEY *keyinfo,
}
else
{
store_val_in_field(part->field, args[between && max_fl ? 2 : 1]);
store_val_in_field(part->field, args[between && max_fl ? 2 : 1],
CHECK_FIELD_IGNORE);
if (part->null_bit)
*key_ptr++= (byte) test(part->field->is_null());
part->field->get_key_image((char*) key_ptr, part->length,
@ -638,6 +639,8 @@ static bool matching_cond(bool max_fl, TABLE_REF *ref, KEY *keyinfo,
field BETWEEN const1 AND const2
3. all references to the columns from the same table as column field
occur only in conjucts mentioned above.
4. each of k first components the index is not partial, i.e. is not
defined on a fixed length proper prefix of the field.
If such an index exists the function through the ref parameter
returns the key value to find max/min for the field using the index,
@ -647,8 +650,8 @@ static bool matching_cond(bool max_fl, TABLE_REF *ref, KEY *keyinfo,
of the whole search key)
NOTE
This function may set table->key_read to 1, which must be reset after
index is used! (This can only happen when function returns 1)
This function may set table->key_read to 1, which must be reset after
index is used! (This can only happen when function returns 1)
RETURN
0 Index can not be used to optimize MIN(field)/MAX(field)
@ -682,6 +685,10 @@ static bool find_key_for_maxmin(bool max_fl, TABLE_REF *ref,
if (!(table->file->index_flags(idx, jdx, 0) & HA_READ_ORDER))
return 0;
/* Check whether the index component is partial */
if (part->length < table->field[part->fieldnr-1]->pack_length())
break;
if (field->eq(part->field))
{
ref->key= idx;

4
sql/sql_parse.cc
View file

@ -3047,8 +3047,8 @@ unsent_create_error:
}
}
if (!thd->is_fatal_error && (result= new multi_delete(thd,aux_tables,
table_count)))
if (!res && !thd->is_fatal_error &&
(result= new multi_delete(thd,aux_tables, table_count)))
{
res= mysql_select(thd, &select_lex->ref_pointer_array,
select_lex->get_table_list(),

6
sql/sql_select.cc
View file

@ -3434,7 +3434,7 @@ get_store_key(THD *thd, KEYUSE *keyuse, table_map used_tables,
*/
bool
store_val_in_field(Field *field,Item *item)
store_val_in_field(Field *field, Item *item, enum_check_fields check_flag)
{
bool error;
THD *thd=current_thd;
@ -3445,7 +3445,7 @@ store_val_in_field(Field *field,Item *item)
with select_insert, which make count_cuted_fields= 1
*/
enum_check_fields old_count_cuted_fields= thd->count_cuted_fields;
thd->count_cuted_fields= CHECK_FIELD_WARN;
thd->count_cuted_fields= check_flag;
error= item->save_in_field(field, 1);
thd->count_cuted_fields= old_count_cuted_fields;
return error || cuted_fields != thd->cuted_fields;
@ -7097,7 +7097,7 @@ static bool test_if_ref(Item_field *left_item,Item *right_item)
field->real_type() != FIELD_TYPE_VAR_STRING &&
(field->type() != FIELD_TYPE_FLOAT || field->decimals() == 0))
{
return !store_val_in_field(field,right_item);
return !store_val_in_field(field, right_item, CHECK_FIELD_WARN);
}
}
}

2
sql/sql_select.h
View file

@ -335,7 +335,7 @@ extern const char *join_type_str[];
void TEST_join(JOIN *join);
/* Extern functions in sql_select.cc */
bool store_val_in_field(Field *field,Item *val);
bool store_val_in_field(Field *field, Item *val, enum_check_fields check_flag);
TABLE *create_tmp_table(THD *thd,TMP_TABLE_PARAM *param,List<Item> &fields,
ORDER *group, bool distinct, bool save_sum_fields,
ulong select_options, ha_rows rows_limit,

8
sql/structs.h
View file

@ -70,7 +70,13 @@ typedef struct st_key_part_info { /* Info about a key part */
Field *field;
uint offset; /* offset in record (from 0) */
uint null_offset; /* Offset to null_bit in record */
uint16 length; /* Length of key_part */
uint16 length; /* Length of keypart value in bytes */
/*
Number of bytes required to store the keypart value. This may be
different from the "length" field as it also counts
- possible NULL-flag byte (see HA_KEY_NULL_LENGTH)
- possible HA_KEY_BLOB_LENGTH bytes needed to store actual value length.
*/
uint16 store_length;
uint16 key_type;
uint16 fieldnr; /* Fieldnum in UNIREG */