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d70bd3f8fb
When we cast datetime value to DATE (TIME) type we should throw away its time (date) part. This was not done properly if CAST() function was used in datetime expressions.
189 lines
6.1 KiB
Text
189 lines
6.1 KiB
Text
select CAST(1-2 AS UNSIGNED);
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CAST(1-2 AS UNSIGNED)
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18446744073709551615
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select CAST(CAST(1-2 AS UNSIGNED) AS SIGNED INTEGER);
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CAST(CAST(1-2 AS UNSIGNED) AS SIGNED INTEGER)
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-1
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select CONVERT('-1',UNSIGNED);
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CONVERT('-1',UNSIGNED)
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18446744073709551615
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select cast(-5 as unsigned) | 1, cast(-5 as unsigned) & -1;
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cast(-5 as unsigned) | 1 cast(-5 as unsigned) & -1
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18446744073709551611 18446744073709551611
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select cast(-5 as unsigned) -1, cast(-5 as unsigned) + 1;
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cast(-5 as unsigned) -1 cast(-5 as unsigned) + 1
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18446744073709551610 18446744073709551612
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select ~5, cast(~5 as signed);
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~5 cast(~5 as signed)
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18446744073709551610 -6
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explain extended select ~5, cast(~5 as signed);
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE NULL NULL NULL NULL NULL NULL NULL No tables used
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Warnings:
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Note 1003 select ~(5) AS `~5`,cast(~(5) as signed) AS `cast(~5 as signed)`
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select cast(5 as unsigned) -6.0;
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cast(5 as unsigned) -6.0
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-1.0
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select cast(NULL as signed), cast(1/0 as signed);
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cast(NULL as signed) cast(1/0 as signed)
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NULL NULL
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select cast(NULL as unsigned), cast(1/0 as unsigned);
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cast(NULL as unsigned) cast(1/0 as unsigned)
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NULL NULL
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select cast("A" as binary) = "a", cast(BINARY "a" as CHAR) = "A";
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cast("A" as binary) = "a" cast(BINARY "a" as CHAR) = "A"
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0 1
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select cast("2001-1-1" as DATE), cast("2001-1-1" as DATETIME);
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cast("2001-1-1" as DATE) cast("2001-1-1" as DATETIME)
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2001-01-01 2001-01-01 00:00:00
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select cast("1:2:3" as TIME);
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cast("1:2:3" as TIME)
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01:02:03
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select CONVERT("2004-01-22 21:45:33",DATE);
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CONVERT("2004-01-22 21:45:33",DATE)
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2004-01-22
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select CONVERT(DATE "2004-01-22 21:45:33" USING latin1);
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CONVERT(DATE "2004-01-22 21:45:33" USING latin1)
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2004-01-22 21:45:33
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select CONVERT(DATE "2004-01-22 21:45:33",CHAR);
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CONVERT(DATE "2004-01-22 21:45:33",CHAR)
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2004-01-22 21:45:33
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select CONVERT(DATE "2004-01-22 21:45:33",CHAR(4));
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CONVERT(DATE "2004-01-22 21:45:33",CHAR(4))
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2004
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select CONVERT(DATE "2004-01-22 21:45:33",BINARY(4));
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CONVERT(DATE "2004-01-22 21:45:33",BINARY(4))
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2004
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select CAST(DATE "2004-01-22 21:45:33" AS BINARY(4));
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CAST(DATE "2004-01-22 21:45:33" AS BINARY(4))
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2004
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set names binary;
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select cast(_latin1'test' as char character set latin2);
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cast(_latin1'test' as char character set latin2)
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test
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select cast(_koi8r'<27><><EFBFBD><EFBFBD>' as char character set cp1251);
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cast(_koi8r'<27><><EFBFBD><EFBFBD>' as char character set cp1251)
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<EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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create table t1 select cast(_koi8r'<27><><EFBFBD><EFBFBD>' as char character set cp1251) as t;
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show create table t1;
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Table Create Table
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t1 CREATE TABLE `t1` (
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`t` char(4) character set cp1251 NOT NULL default ''
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) ENGINE=MyISAM DEFAULT CHARSET=latin1
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drop table t1;
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select
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cast(_latin1'ab' AS char) as c1,
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cast(_latin1'a ' AS char) as c2,
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cast(_latin1'abc' AS char(2)) as c3,
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cast(_latin1'a ' AS char(2)) as c4,
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cast(_latin1'a' AS char(2)) as c5;
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c1 c2 c3 c4 c5
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ab a ab a a
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create table t1 select
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cast(_latin1'ab' AS char) as c1,
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cast(_latin1'a ' AS char) as c2,
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cast(_latin1'abc' AS char(2)) as c3,
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cast(_latin1'a ' AS char(2)) as c4,
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cast(_latin1'a' AS char(2)) as c5;
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select * from t1;
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c1 c2 c3 c4 c5
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ab a ab a a
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show create table t1;
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Table Create Table
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t1 CREATE TABLE `t1` (
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`c1` binary(2) NOT NULL default '',
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`c2` binary(2) NOT NULL default '',
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`c3` binary(2) NOT NULL default '',
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`c4` binary(2) NOT NULL default '',
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`c5` binary(2) NOT NULL default ''
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) ENGINE=MyISAM DEFAULT CHARSET=latin1
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drop table t1;
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select
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cast(_koi8r'<27><>' AS nchar) as c1,
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cast(_koi8r'<27> ' AS nchar) as c2,
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cast(_koi8r'<27><><EFBFBD>' AS nchar(2)) as c3,
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cast(_koi8r'<27> ' AS nchar(2)) as c4,
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cast(_koi8r'<27>' AS nchar(2)) as c5;
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c1 c2 c3 c4 c5
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фг ф фг ф ф
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create table t1 select
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cast(_koi8r'<27><>' AS nchar) as c1,
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cast(_koi8r'<27> ' AS nchar) as c2,
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cast(_koi8r'<27><><EFBFBD>' AS nchar(2)) as c3,
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cast(_koi8r'<27> ' AS nchar(2)) as c4,
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cast(_koi8r'<27>' AS nchar(2)) as c5;
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select * from t1;
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c1 c2 c3 c4 c5
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фг ф фг ф ф
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show create table t1;
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Table Create Table
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t1 CREATE TABLE `t1` (
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`c1` char(2) character set utf8 NOT NULL default '',
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`c2` char(2) character set utf8 NOT NULL default '',
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`c3` char(2) character set utf8 NOT NULL default '',
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`c4` char(2) character set utf8 NOT NULL default '',
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`c5` char(2) character set utf8 NOT NULL default ''
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) ENGINE=MyISAM DEFAULT CHARSET=latin1
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drop table t1;
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create table t1 (a binary(10), b char(10) character set koi8r);
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insert into t1 values (_binary'<27><><EFBFBD><EFBFBD>',_binary'<27><><EFBFBD><EFBFBD>');
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select a,b,cast(a as char character set cp1251),cast(b as binary) from t1;
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a b cast(a as char character set cp1251) cast(b as binary)
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<EFBFBD><EFBFBD><EFBFBD><EFBFBD> <09><><EFBFBD><EFBFBD> <09><><EFBFBD><EFBFBD> <09><><EFBFBD><EFBFBD>
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set names koi8r;
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select a,b,cast(a as char character set cp1251),cast(b as binary) from t1;
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a b cast(a as char character set cp1251) cast(b as binary)
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<EFBFBD><EFBFBD><EFBFBD><EFBFBD> <09><><EFBFBD><EFBFBD> <09><><EFBFBD><EFBFBD> <09><><EFBFBD><EFBFBD>
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set names cp1251;
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select a,b,cast(a as char character set cp1251),cast(b as binary) from t1;
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a b cast(a as char character set cp1251) cast(b as binary)
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<EFBFBD><EFBFBD><EFBFBD><EFBFBD> <09><><EFBFBD><EFBFBD> <09><><EFBFBD><EFBFBD> <09><><EFBFBD><EFBFBD>
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drop table t1;
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set names binary;
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select cast("2001-1-1" as date) = "2001-01-01";
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cast("2001-1-1" as date) = "2001-01-01"
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1
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select cast("2001-1-1" as datetime) = "2001-01-01 00:00:00";
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cast("2001-1-1" as datetime) = "2001-01-01 00:00:00"
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1
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select cast("1:2:3" as TIME) = "1:02:03";
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cast("1:2:3" as TIME) = "1:02:03"
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0
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select cast(NULL as DATE);
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cast(NULL as DATE)
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NULL
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select cast(NULL as BINARY);
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cast(NULL as BINARY)
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NULL
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CREATE TABLE t1 (a enum ('aac','aab','aaa') not null);
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INSERT INTO t1 VALUES ('aaa'),('aab'),('aac');
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SELECT a, CAST(a AS CHAR) FROM t1 ORDER BY CAST(a AS UNSIGNED) ;
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a CAST(a AS CHAR)
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aac aac
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aab aab
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aaa aaa
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SELECT a, CAST(a AS CHAR(3)) FROM t1 ORDER BY CAST(a AS CHAR(2)), a;
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a CAST(a AS CHAR(3))
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aac aac
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aab aab
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aaa aaa
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SELECT a, CAST(a AS UNSIGNED) FROM t1 ORDER BY CAST(a AS CHAR) ;
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a CAST(a AS UNSIGNED)
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aaa 3
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aab 2
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aac 1
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SELECT a, CAST(a AS CHAR(2)) FROM t1 ORDER BY CAST(a AS CHAR(3)), a;
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a CAST(a AS CHAR(2))
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aaa aa
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aab aa
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aac aa
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DROP TABLE t1;
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select date_add(cast('2004-12-30 12:00:00' as date), interval 0 hour);
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date_add(cast('2004-12-30 12:00:00' as date), interval 0 hour)
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2004-12-30 00:00:00
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select timediff(cast('2004-12-30 12:00:00' as time), '12:00:00');
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timediff(cast('2004-12-30 12:00:00' as time), '12:00:00')
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00:00:00
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select timediff(cast('1 12:00:00' as time), '12:00:00');
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timediff(cast('1 12:00:00' as time), '12:00:00')
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24:00:00
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