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180065ebb0
by introducing new Item::precedence() method and using it to decide whether parentheses are required
209 lines
8.1 KiB
Plaintext
209 lines
8.1 KiB
Plaintext
set time_zone='+03:00';
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set timestamp=unix_timestamp('2011-01-01 01:01:01.123456');
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select sec_to_time(12345), sec_to_time(12345.6789), sec_to_time(1234567e-2);
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sec_to_time(12345) 03:25:45
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sec_to_time(12345.6789) 03:25:45.6789
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sec_to_time(1234567e-2) 03:25:45.670000
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select now(), curtime(0), utc_timestamp(1), utc_time(2), current_time(3),
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current_timestamp(4), localtime(5), localtimestamp(6), time_to_sec('12:34:56'),
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time_to_sec('12:34:56.789');
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now() 2011-01-01 01:01:01
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curtime(0) 01:01:01
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utc_timestamp(1) 2010-12-31 22:01:01.1
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utc_time(2) 22:01:01.12
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current_time(3) 01:01:01.123
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current_timestamp(4) 2011-01-01 01:01:01.1234
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localtime(5) 2011-01-01 01:01:01.12345
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localtimestamp(6) 2011-01-01 01:01:01.123456
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time_to_sec('12:34:56') 45296
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time_to_sec('12:34:56.789') 45296.789
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select sec_to_time(time_to_sec('1:2:3')), sec_to_time(time_to_sec('2:3:4.567890'));
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sec_to_time(time_to_sec('1:2:3')) 01:02:03
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sec_to_time(time_to_sec('2:3:4.567890')) 02:03:04.567890
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select time_to_sec(sec_to_time(11111)), time_to_sec(sec_to_time(11111.22222));
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time_to_sec(sec_to_time(11111)) 11111
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time_to_sec(sec_to_time(11111.22222)) 11111.22222
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select current_timestamp(7);
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ERROR 42000: Too big precision 7 specified for 'current_timestamp'. Maximum is 6
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select curtime(7);
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ERROR 42000: Too big precision 7 specified for 'curtime'. Maximum is 6
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drop table if exists t1;
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create table t1 select sec_to_time(12345), sec_to_time(12345.6789),
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sec_to_time(1234567e-2), now(), curtime(0),
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utc_timestamp(1), utc_time(2), current_time(3),
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current_timestamp(4), localtime(5), localtimestamp(6),
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time_to_sec(123456), time_to_sec('12:34:56.789');
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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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`sec_to_time(12345)` time DEFAULT NULL,
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`sec_to_time(12345.6789)` time(4) DEFAULT NULL,
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`sec_to_time(1234567e-2)` time(6) DEFAULT NULL,
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`now()` datetime NOT NULL,
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`curtime(0)` time NOT NULL,
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`utc_timestamp(1)` datetime(1) NOT NULL,
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`utc_time(2)` time(2) NOT NULL,
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`current_time(3)` time(3) NOT NULL,
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`current_timestamp(4)` datetime(4) NOT NULL,
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`localtime(5)` datetime(5) NOT NULL,
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`localtimestamp(6)` datetime(6) NOT NULL,
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`time_to_sec(123456)` bigint(17) DEFAULT NULL,
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`time_to_sec('12:34:56.789')` decimal(19,3) DEFAULT NULL
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) ENGINE=MyISAM DEFAULT CHARSET=latin1
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select * from t1;
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sec_to_time(12345) 03:25:45
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sec_to_time(12345.6789) 03:25:45.6789
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sec_to_time(1234567e-2) 03:25:45.670000
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now() 2011-01-01 01:01:01
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curtime(0) 01:01:01
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utc_timestamp(1) 2010-12-31 22:01:01.1
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utc_time(2) 22:01:01.12
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current_time(3) 01:01:01.123
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current_timestamp(4) 2011-01-01 01:01:01.1234
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localtime(5) 2011-01-01 01:01:01.12345
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localtimestamp(6) 2011-01-01 01:01:01.123456
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time_to_sec(123456) 45296
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time_to_sec('12:34:56.789') 45296.789
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drop table t1;
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select unix_timestamp('2011-01-01 01:01:01'), unix_timestamp('2011-01-01 01:01:01.123456'), unix_timestamp(cast('2011-01-01 01:01:01.123456' as datetime(0))), unix_timestamp(cast('2011-01-01 01:01:01.123456' as datetime(4)));;
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unix_timestamp('2011-01-01 01:01:01') 1293832861
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unix_timestamp('2011-01-01 01:01:01.123456') 1293832861.123456
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unix_timestamp(cast('2011-01-01 01:01:01.123456' as datetime(0))) 1293832861
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unix_timestamp(cast('2011-01-01 01:01:01.123456' as datetime(4))) 1293832861.1234
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select from_unixtime(unix_timestamp('2011/1/1 1:1:1')), from_unixtime(unix_timestamp('2011/1/1 1:1:1.123456')), from_unixtime(unix_timestamp(cast('2011/1/1 1:1:1.123456' as datetime(0)))), from_unixtime(unix_timestamp(cast('2011/1/1 1:1:1.123456' as datetime(4))));;
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from_unixtime(unix_timestamp('2011/1/1 1:1:1')) 2011-01-01 01:01:01
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from_unixtime(unix_timestamp('2011/1/1 1:1:1.123456')) 2011-01-01 01:01:01.123456
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from_unixtime(unix_timestamp(cast('2011/1/1 1:1:1.123456' as datetime(0)))) 2011-01-01 01:01:01
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from_unixtime(unix_timestamp(cast('2011/1/1 1:1:1.123456' as datetime(4)))) 2011-01-01 01:01:01.1234
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select sec_to_time(3020399.99999), sec_to_time(3020399.999999), sec_to_time(3020399.9999999);
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sec_to_time(3020399.99999) sec_to_time(3020399.999999) sec_to_time(3020399.9999999)
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838:59:59.99999 838:59:59.999999 838:59:59.999999
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select sec_to_time(-3020399.99999), sec_to_time(-3020399.999999), sec_to_time(-3020399.9999999);
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sec_to_time(-3020399.99999) sec_to_time(-3020399.999999) sec_to_time(-3020399.9999999)
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-838:59:59.99999 -838:59:59.999999 -838:59:59.999999
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select 20010101000203.000000004 + interval 1 day;
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20010101000203.000000004 + interval 1 day
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2001-01-02 00:02:03.000000
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select 20010101000203.4 + interval 1 day;
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20010101000203.4 + interval 1 day
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2001-01-02 00:02:03.4
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set @a=cast('2011-01-02 12:13:14' as datetime);
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select @a + interval 1 minute;
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@a + interval 1 minute
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2011-01-02 12:14:14
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select @a + interval 10 microsecond;
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@a + interval 10 microsecond
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2011-01-02 12:13:14.000010
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select @a + interval 10 microsecond + interval 999990 microsecond;
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@a + interval 10 microsecond + interval 999990 microsecond
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2011-01-02 12:13:15.000000
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set @a='2011-01-02 12:13:14.123456';
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create table t1 select CAST(@a AS DATETIME) as dauto,
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CAST(@a AS DATETIME(0)) as d0,
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CAST(@a AS DATETIME(1)) as d1,
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CAST(@a AS DATETIME(2)) as d2,
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CAST(@a AS DATETIME(3)) as d3,
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CAST(@a AS DATETIME(4)) as d4,
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CAST(@a AS DATETIME(5)) as d5,
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CAST(@a AS DATETIME(6)) as d6,
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CAST(@a AS TIME) as tauto,
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CAST(@a AS TIME(0)) as t0,
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CAST(@a AS TIME(1)) as t1,
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CAST(@a AS TIME(2)) as t2,
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CAST(@a AS TIME(3)) as t3,
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CAST(@a AS TIME(4)) as t4,
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CAST(@a AS TIME(5)) as t5,
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CAST(@a AS TIME(6)) as t6;
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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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`dauto` datetime DEFAULT NULL,
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`d0` datetime DEFAULT NULL,
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`d1` datetime(1) DEFAULT NULL,
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`d2` datetime(2) DEFAULT NULL,
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`d3` datetime(3) DEFAULT NULL,
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`d4` datetime(4) DEFAULT NULL,
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`d5` datetime(5) DEFAULT NULL,
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`d6` datetime(6) DEFAULT NULL,
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`tauto` time DEFAULT NULL,
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`t0` time DEFAULT NULL,
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`t1` time(1) DEFAULT NULL,
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`t2` time(2) DEFAULT NULL,
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`t3` time(3) DEFAULT NULL,
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`t4` time(4) DEFAULT NULL,
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`t5` time(5) DEFAULT NULL,
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`t6` time(6) DEFAULT NULL
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) ENGINE=MyISAM DEFAULT CHARSET=latin1
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select * from t1;
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dauto 2011-01-02 12:13:14
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d0 2011-01-02 12:13:14
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d1 2011-01-02 12:13:14.1
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d2 2011-01-02 12:13:14.12
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d3 2011-01-02 12:13:14.123
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d4 2011-01-02 12:13:14.1234
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d5 2011-01-02 12:13:14.12345
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d6 2011-01-02 12:13:14.123456
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tauto 12:13:14
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t0 12:13:14
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t1 12:13:14.1
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t2 12:13:14.12
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t3 12:13:14.123
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t4 12:13:14.1234
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t5 12:13:14.12345
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t6 12:13:14.123456
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drop table t1;
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explain extended select cast(cast(@a as datetime(4)) as time(0));
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL No tables used
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Warnings:
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Note 1003 select cast(cast(@`a` as datetime(4)) as time) AS `cast(cast(@a as datetime(4)) as time(0))`
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select cast(cast(@a as time(2)) as time(6));
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cast(cast(@a as time(2)) as time(6))
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12:13:14.120000
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select CAST(@a AS DATETIME(7));
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ERROR 42000: Too big precision 7 specified for '@`a`'. Maximum is 6
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SELECT CONVERT_TZ('2011-01-02 12:00:00', '+00:00', '+03:00');
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CONVERT_TZ('2011-01-02 12:00:00', '+00:00', '+03:00')
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2011-01-02 15:00:00
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SELECT CONVERT_TZ('2011-01-02 12:00:00.123', '+00:00', '+03:00');
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CONVERT_TZ('2011-01-02 12:00:00.123', '+00:00', '+03:00')
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2011-01-02 15:00:00.123
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SELECT CONVERT_TZ('2011-01-02 12:00:00.123456', '+00:00', '+03:00');
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CONVERT_TZ('2011-01-02 12:00:00.123456', '+00:00', '+03:00')
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2011-01-02 15:00:00.123456
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SELECT CONVERT_TZ(CAST('2010-10-10 10:10:10.123456' AS DATETIME(4)), '+00:00', '+03:00');
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CONVERT_TZ(CAST('2010-10-10 10:10:10.123456' AS DATETIME(4)), '+00:00', '+03:00')
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2010-10-10 13:10:10.1234
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create table t1 (a varchar(200));
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insert t1 values (now(6));
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select * from t1;
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a
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2011-01-01 01:01:01.123456
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drop table t1;
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create table t1 (f1 timestamp(6));
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insert into t1 values ('2002-07-15 21:00:00');
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select time(f1) from t1;
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time(f1)
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21:00:00.000000
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select time(f1) from t1 union all select time(f1 + interval 1 second) from t1;
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time(f1)
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21:00:00.000000
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21:00:01.000000
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alter table t1 modify f1 timestamp;
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select time(f1) from t1;
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time(f1)
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21:00:00
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select time(f1) from t1 union all select time(f1 + interval 1 second) from t1;
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time(f1)
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21:00:00
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21:00:01
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alter table t1 modify f1 varchar(100);
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select time(f1) from t1;
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time(f1)
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21:00:00.000000
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select time(f1) from t1 union all select time(f1 + interval 1 second) from t1;
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time(f1)
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21:00:00.000000
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21:00:01.000000
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drop table t1;
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