mirror of
https://github.com/MariaDB/server.git
synced 2026-05-15 11:27:39 +02:00
47311e8e87
can lead to a wrong result. All date/time functions has the STRING result type thus their results are compared as strings. The string date representation allows a user to skip some of leading zeros. This can lead to wrong comparison result if a date/time function result is compared to such a string constant. The idea behind this bug fix is to compare results of date/time functions and data/time constants as ints, because that date/time representation is more exact. To achieve this the agg_cmp_type() is changed to take in the account that a date/time field or an date/time item should be compared as ints. This bug fix is partially back ported from 5.0. The agg_cmp_type() function now accepts THD as one of parameters. In addition, it now checks if a date/time field/function is present in the list. If so, it tries to coerce all constants to INT to make date/time comparison return correct result. The field for the constant coercion is taken from the Item_field or constructed from the Item_func. In latter case the constructed field will be freed after conversion of all constant items. Otherwise the result is same as before - aggregated with help of the item_cmp_type() function. From the Item_func_between::fix_length_and_dec() function removed the part which was converting date/time constants to int if possible. Now this is done by the agg_cmp_type() function. The new function result_as_longlong() is added to the Item class. It indicates that the item is a date/time item and result of it can be compared as int. Such items are date/time fields/functions. Correct val_int() methods are implemented for classes Item_date_typecast, Item_func_makedate, Item_time_typecast, Item_datetime_typecast. All these classes are derived from Item_str_func and Item_str_func::val_int() converts its string value to int without regard to the date/time type of these items. Arg_comparator::set_compare_func() and Arg_comparator::set_cmp_func() functions are changed to substitute result type of an item with the INT_RESULT if the item is a date/time item and another item is a constant. This is done to get a correct result of comparisons like date_time_function() = string_constant. mysql-test/r/cast.result: Fixed wrong test case result after bug fix#16377. sql/item_timefunc.h: Fixed bug#16377: result of DATE/TIME functions were compared as strings which can lead to a wrong result. The result_as_longlong() function is set to return TRUE for these classes: Item_date, Item_date_func, Item_func_curtime, Item_func_sec_to_time, Item_date_typecast, Item_time_typecast, Item_datetime_typecast, Item_func_makedate. sql/item_timefunc.cc: Fixed bug#16377: result of DATE/TIME functions were compared as strings which can lead to a wrong result.Correct val_int() methods are implemented for classes Item_date_typecast, Item_func_makedate, Item_time_typecast, Item_datetime_typecast. sql/item_cmpfunc.h: Fixed bug#16377: result of DATE/TIME functions were compared as strings which can lead to a wrong result. Arg_comparator::set_compare_func() and Arg_comparator::set_cmp_func() functions are changed to substitute result type of an item with the INT_RESULT if the item is a date/time item and another item is a constant. sql/field.cc: Fixed bug#16377: result of DATE/TIME functions were compared as strings which can lead to a wrong result. Field::set_warning(), Field::set_datetime_warning() now use current_thd to get thd if table isn't set. sql/item_cmpfunc.cc: Fixed bug#16377: result of DATE/TIME functions were compared as strings which can lead to a wrong result. The agg_cmp_type() function now accepts THD as one of parameters. In addition, it now checks if a date/time field/function is present in the list. If so, it tries to coerce all constants to INT to make date/time comparison return correct result. The field for the constant coercion is taken from the Item_field or constructed from the Item_func. In latter case the constructed field will be freed after conversion of all constant items. Otherwise the result is same as before - aggregated with help of the item_cmp_type() function. sql/item.h: The new function result_as_longlong() is added to the Item class. It indicates that the item is a date/time item and result of it can be compared as int. Such items are date/time fields/functions. mysql-test/t/func_time.test: Added test case fot bug#16377: result of DATE/TIME functions were compared as strings which can lead to a wrong result. mysql-test/r/func_time.result: Added test case fot bug#16377: result of DATE/TIME functions were compared as strings which can lead to a wrong result.
277 lines
9 KiB
Text
277 lines
9 KiB
Text
select CAST(1-2 AS UNSIGNED);
|
||
CAST(1-2 AS UNSIGNED)
|
||
18446744073709551615
|
||
select CAST(CAST(1-2 AS UNSIGNED) AS SIGNED INTEGER);
|
||
CAST(CAST(1-2 AS UNSIGNED) AS SIGNED INTEGER)
|
||
-1
|
||
select cast(-5 as unsigned) | 1, cast(-5 as unsigned) & -1;
|
||
cast(-5 as unsigned) | 1 cast(-5 as unsigned) & -1
|
||
18446744073709551611 18446744073709551611
|
||
select cast(-5 as unsigned) -1, cast(-5 as unsigned) + 1;
|
||
cast(-5 as unsigned) -1 cast(-5 as unsigned) + 1
|
||
18446744073709551610 18446744073709551612
|
||
select ~5, cast(~5 as signed);
|
||
~5 cast(~5 as signed)
|
||
18446744073709551610 -6
|
||
explain extended select ~5, cast(~5 as signed);
|
||
id select_type table type possible_keys key key_len ref rows Extra
|
||
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL No tables used
|
||
Warnings:
|
||
Note 1003 select ~(5) AS `~5`,cast(~(5) as signed) AS `cast(~5 as signed)`
|
||
select cast(5 as unsigned) -6.0;
|
||
cast(5 as unsigned) -6.0
|
||
-1.0
|
||
select cast(NULL as signed), cast(1/0 as signed);
|
||
cast(NULL as signed) cast(1/0 as signed)
|
||
NULL NULL
|
||
select cast(NULL as unsigned), cast(1/0 as unsigned);
|
||
cast(NULL as unsigned) cast(1/0 as unsigned)
|
||
NULL NULL
|
||
select cast("A" as binary) = "a", cast(BINARY "a" as CHAR) = "A";
|
||
cast("A" as binary) = "a" cast(BINARY "a" as CHAR) = "A"
|
||
0 1
|
||
select cast("2001-1-1" as DATE), cast("2001-1-1" as DATETIME);
|
||
cast("2001-1-1" as DATE) cast("2001-1-1" as DATETIME)
|
||
2001-01-01 2001-01-01 00:00:00
|
||
select cast("1:2:3" as TIME);
|
||
cast("1:2:3" as TIME)
|
||
01:02:03
|
||
select CONVERT("2004-01-22 21:45:33",DATE);
|
||
CONVERT("2004-01-22 21:45:33",DATE)
|
||
2004-01-22
|
||
select CONVERT(DATE "2004-01-22 21:45:33" USING latin1);
|
||
CONVERT(DATE "2004-01-22 21:45:33" USING latin1)
|
||
2004-01-22 21:45:33
|
||
select CONVERT(DATE "2004-01-22 21:45:33",CHAR);
|
||
CONVERT(DATE "2004-01-22 21:45:33",CHAR)
|
||
2004-01-22 21:45:33
|
||
select CONVERT(DATE "2004-01-22 21:45:33",CHAR(4));
|
||
CONVERT(DATE "2004-01-22 21:45:33",CHAR(4))
|
||
2004
|
||
select CONVERT(DATE "2004-01-22 21:45:33",BINARY(4));
|
||
CONVERT(DATE "2004-01-22 21:45:33",BINARY(4))
|
||
2004
|
||
select CAST(DATE "2004-01-22 21:45:33" AS BINARY(4));
|
||
CAST(DATE "2004-01-22 21:45:33" AS BINARY(4))
|
||
2004
|
||
select CAST(0xb3 as signed);
|
||
CAST(0xb3 as signed)
|
||
179
|
||
select CAST(0x8fffffffffffffff as signed);
|
||
CAST(0x8fffffffffffffff as signed)
|
||
-8070450532247928833
|
||
select CAST(0xffffffffffffffff as unsigned);
|
||
CAST(0xffffffffffffffff as unsigned)
|
||
18446744073709551615
|
||
select CAST(0xfffffffffffffffe as signed);
|
||
CAST(0xfffffffffffffffe as signed)
|
||
-2
|
||
select cast('18446744073709551616' as unsigned);
|
||
cast('18446744073709551616' as unsigned)
|
||
18446744073709551615
|
||
Warnings:
|
||
Warning 1292 Truncated incorrect INTEGER value: '18446744073709551616'
|
||
select cast('18446744073709551616' as signed);
|
||
cast('18446744073709551616' as signed)
|
||
-1
|
||
Warnings:
|
||
Warning 1292 Truncated incorrect INTEGER value: '18446744073709551616'
|
||
select cast('9223372036854775809' as signed);
|
||
cast('9223372036854775809' as signed)
|
||
-9223372036854775807
|
||
Warnings:
|
||
Warning 1105 Cast to signed converted positive out-of-range integer to it's negative complement
|
||
select cast('-1' as unsigned);
|
||
cast('-1' as unsigned)
|
||
18446744073709551615
|
||
Warnings:
|
||
Warning 1105 Cast to unsigned converted negative integer to it's positive complement
|
||
select cast('abc' as signed);
|
||
cast('abc' as signed)
|
||
0
|
||
Warnings:
|
||
Warning 1292 Truncated incorrect INTEGER value: 'abc'
|
||
select cast('1a' as signed);
|
||
cast('1a' as signed)
|
||
1
|
||
Warnings:
|
||
Warning 1292 Truncated incorrect INTEGER value: '1a'
|
||
select cast('' as signed);
|
||
cast('' as signed)
|
||
0
|
||
Warnings:
|
||
Warning 1292 Truncated incorrect INTEGER value: ''
|
||
set names binary;
|
||
select cast(_latin1'test' as char character set latin2);
|
||
cast(_latin1'test' as char character set latin2)
|
||
test
|
||
select cast(_koi8r'<27><><EFBFBD><EFBFBD>' as char character set cp1251);
|
||
cast(_koi8r'<27><><EFBFBD><EFBFBD>' as char character set cp1251)
|
||
<EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
||
create table t1 select cast(_koi8r'<27><><EFBFBD><EFBFBD>' as char character set cp1251) as t;
|
||
show create table t1;
|
||
Table Create Table
|
||
t1 CREATE TABLE `t1` (
|
||
`t` char(4) character set cp1251 NOT NULL default ''
|
||
) ENGINE=MyISAM DEFAULT CHARSET=latin1
|
||
drop table t1;
|
||
select
|
||
cast(_latin1'ab' AS char) as c1,
|
||
cast(_latin1'a ' AS char) as c2,
|
||
cast(_latin1'abc' AS char(2)) as c3,
|
||
cast(_latin1'a ' AS char(2)) as c4,
|
||
cast(_latin1'a' AS char(2)) as c5;
|
||
c1 c2 c3 c4 c5
|
||
ab a ab a a
|
||
create table t1 select
|
||
cast(_latin1'ab' AS char) as c1,
|
||
cast(_latin1'a ' AS char) as c2,
|
||
cast(_latin1'abc' AS char(2)) as c3,
|
||
cast(_latin1'a ' AS char(2)) as c4,
|
||
cast(_latin1'a' AS char(2)) as c5;
|
||
select * from t1;
|
||
c1 c2 c3 c4 c5
|
||
ab a ab a a
|
||
show create table t1;
|
||
Table Create Table
|
||
t1 CREATE TABLE `t1` (
|
||
`c1` binary(2) NOT NULL default '',
|
||
`c2` binary(2) NOT NULL default '',
|
||
`c3` binary(2) NOT NULL default '',
|
||
`c4` binary(2) NOT NULL default '',
|
||
`c5` binary(2) NOT NULL default ''
|
||
) ENGINE=MyISAM DEFAULT CHARSET=latin1
|
||
drop table t1;
|
||
select
|
||
cast(_koi8r'<27><>' AS nchar) as c1,
|
||
cast(_koi8r'<27> ' AS nchar) as c2,
|
||
cast(_koi8r'<27><><EFBFBD>' AS nchar(2)) as c3,
|
||
cast(_koi8r'<27> ' AS nchar(2)) as c4,
|
||
cast(_koi8r'<27>' AS nchar(2)) as c5;
|
||
c1 c2 c3 c4 c5
|
||
фг ф фг ф ф
|
||
create table t1 select
|
||
cast(_koi8r'<27><>' AS nchar) as c1,
|
||
cast(_koi8r'<27> ' AS nchar) as c2,
|
||
cast(_koi8r'<27><><EFBFBD>' AS nchar(2)) as c3,
|
||
cast(_koi8r'<27> ' AS nchar(2)) as c4,
|
||
cast(_koi8r'<27>' AS nchar(2)) as c5;
|
||
select * from t1;
|
||
c1 c2 c3 c4 c5
|
||
фг ф фг ф ф
|
||
show create table t1;
|
||
Table Create Table
|
||
t1 CREATE TABLE `t1` (
|
||
`c1` char(2) character set utf8 NOT NULL default '',
|
||
`c2` char(2) character set utf8 NOT NULL default '',
|
||
`c3` char(2) character set utf8 NOT NULL default '',
|
||
`c4` char(2) character set utf8 NOT NULL default '',
|
||
`c5` char(2) character set utf8 NOT NULL default ''
|
||
) ENGINE=MyISAM DEFAULT CHARSET=latin1
|
||
drop table t1;
|
||
create table t1 (a binary(10), b char(10) character set koi8r);
|
||
insert into t1 values (_binary'<27><><EFBFBD><EFBFBD>',_binary'<27><><EFBFBD><EFBFBD>');
|
||
select a,b,cast(a as char character set cp1251),cast(b as binary) from t1;
|
||
a b cast(a as char character set cp1251) cast(b as binary)
|
||
<EFBFBD><EFBFBD><EFBFBD><EFBFBD> <09><><EFBFBD><EFBFBD> <09><><EFBFBD><EFBFBD> <09><><EFBFBD><EFBFBD>
|
||
set names koi8r;
|
||
select a,b,cast(a as char character set cp1251),cast(b as binary) from t1;
|
||
a b cast(a as char character set cp1251) cast(b as binary)
|
||
<EFBFBD><EFBFBD><EFBFBD><EFBFBD> <09><><EFBFBD><EFBFBD> <09><><EFBFBD><EFBFBD> <09><><EFBFBD><EFBFBD>
|
||
set names cp1251;
|
||
select a,b,cast(a as char character set cp1251),cast(b as binary) from t1;
|
||
a b cast(a as char character set cp1251) cast(b as binary)
|
||
<EFBFBD><EFBFBD><EFBFBD><EFBFBD> <09><><EFBFBD><EFBFBD> <09><><EFBFBD><EFBFBD> <09><><EFBFBD><EFBFBD>
|
||
drop table t1;
|
||
set names binary;
|
||
select cast("2001-1-1" as date) = "2001-01-01";
|
||
cast("2001-1-1" as date) = "2001-01-01"
|
||
1
|
||
select cast("2001-1-1" as datetime) = "2001-01-01 00:00:00";
|
||
cast("2001-1-1" as datetime) = "2001-01-01 00:00:00"
|
||
1
|
||
select cast("1:2:3" as TIME) = "1:02:03";
|
||
cast("1:2:3" as TIME) = "1:02:03"
|
||
1
|
||
select cast(NULL as DATE);
|
||
cast(NULL as DATE)
|
||
NULL
|
||
select cast(NULL as BINARY);
|
||
cast(NULL as BINARY)
|
||
NULL
|
||
CREATE TABLE t1 (a enum ('aac','aab','aaa') not null);
|
||
INSERT INTO t1 VALUES ('aaa'),('aab'),('aac');
|
||
SELECT a, CAST(a AS CHAR) FROM t1 ORDER BY CAST(a AS UNSIGNED) ;
|
||
a CAST(a AS CHAR)
|
||
aac aac
|
||
aab aab
|
||
aaa aaa
|
||
SELECT a, CAST(a AS CHAR(3)) FROM t1 ORDER BY CAST(a AS CHAR(2)), a;
|
||
a CAST(a AS CHAR(3))
|
||
aac aac
|
||
aab aab
|
||
aaa aaa
|
||
SELECT a, CAST(a AS UNSIGNED) FROM t1 ORDER BY CAST(a AS CHAR) ;
|
||
a CAST(a AS UNSIGNED)
|
||
aaa 3
|
||
aab 2
|
||
aac 1
|
||
SELECT a, CAST(a AS CHAR(2)) FROM t1 ORDER BY CAST(a AS CHAR(3)), a;
|
||
a CAST(a AS CHAR(2))
|
||
aaa aa
|
||
aab aa
|
||
aac aa
|
||
DROP TABLE t1;
|
||
select date_add(cast('2004-12-30 12:00:00' as date), interval 0 hour);
|
||
date_add(cast('2004-12-30 12:00:00' as date), interval 0 hour)
|
||
2004-12-30 00:00:00
|
||
select timediff(cast('2004-12-30 12:00:00' as time), '12:00:00');
|
||
timediff(cast('2004-12-30 12:00:00' as time), '12:00:00')
|
||
00:00:00
|
||
select timediff(cast('1 12:00:00' as time), '12:00:00');
|
||
timediff(cast('1 12:00:00' as time), '12:00:00')
|
||
24:00:00
|
||
select cast(18446744073709551615 as unsigned);
|
||
cast(18446744073709551615 as unsigned)
|
||
18446744073709551615
|
||
select cast(18446744073709551615 as signed);
|
||
cast(18446744073709551615 as signed)
|
||
-1
|
||
select cast('18446744073709551615' as unsigned);
|
||
cast('18446744073709551615' as unsigned)
|
||
18446744073709551615
|
||
select cast('18446744073709551615' as signed);
|
||
cast('18446744073709551615' as signed)
|
||
-1
|
||
Warnings:
|
||
Warning 1105 Cast to signed converted positive out-of-range integer to it's negative complement
|
||
select cast('9223372036854775807' as signed);
|
||
cast('9223372036854775807' as signed)
|
||
9223372036854775807
|
||
select cast(concat('184467440','73709551615') as unsigned);
|
||
cast(concat('184467440','73709551615') as unsigned)
|
||
18446744073709551615
|
||
select cast(concat('184467440','73709551615') as signed);
|
||
cast(concat('184467440','73709551615') as signed)
|
||
-1
|
||
Warnings:
|
||
Warning 1105 Cast to signed converted positive out-of-range integer to it's negative complement
|
||
select cast(repeat('1',20) as unsigned);
|
||
cast(repeat('1',20) as unsigned)
|
||
11111111111111111111
|
||
select cast(repeat('1',20) as signed);
|
||
cast(repeat('1',20) as signed)
|
||
-7335632962598440505
|
||
Warnings:
|
||
Warning 1105 Cast to signed converted positive out-of-range integer to it's negative complement
|
||
select cast(1.0e+300 as signed int);
|
||
cast(1.0e+300 as signed int)
|
||
9223372036854775807
|
||
CREATE TABLE t1 (f1 double);
|
||
INSERT INTO t1 SET f1 = -1.0e+30 ;
|
||
INSERT INTO t1 SET f1 = +1.0e+30 ;
|
||
SELECT f1 AS double_val, CAST(f1 AS SIGNED INT) AS cast_val FROM t1;
|
||
double_val cast_val
|
||
-1e+30 -9223372036854775808
|
||
1e+30 9223372036854775807
|
||
DROP TABLE t1;
|