Details
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New Feature
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Status: Closed (View Workflow)
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Major
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Resolution: Won't Do
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1.2.3
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None
Description
Nanoseconds in MariaDB
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Currently we have Microseconds in MariaDB
https://mariadb.com/kb/en/library/microseconds-in-mariadb/
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MariaDB [test]> SELECT CAST('2009-12-31 23:59:59.9876543210' as DATETIME(6));
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+-------------------------------------------------------+
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| CAST('2009-12-31 23:59:59.9876543210' as DATETIME(6)) |
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+-------------------------------------------------------+
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| 2009-12-31 23:59:59.987654 |
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+-------------------------------------------------------+
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1 row in set, 1 warning (0.000 sec)
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MariaDB [test]> SELECT CAST('2009-12-31 23:59:59.9876543210' as DATETIME(10));
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ERROR 1426 (42000): Too big precision 10 specified for '2009-12-31 23:59:59.9876543210'. Maximum is 6
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MariaDB [test]> SELECT CAST('2009-12-31 23:59:59.9876543210' as DATETIME(9));
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ERROR 1426 (42000): Too big precision 9 specified for '2009-12-31 23:59:59.9876543210'. Maximum is 6
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Nanoseconds in MariaDB
It ranges from 0 to 9, meaning that we can use the TIMESTAMP data type to store up to nanosecond. Currently MariaDB support fractional seconds precision sets to microsecond.
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MariaDB [test]> SELECT TIME'10:10:10.1234567890';
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+---------------------------+
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| TIME'10:10:10.1234567890' |
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+---------------------------+
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| 10:10:10.123456 |
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+---------------------------+
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1 row in set, 1 warning (0.001 sec)
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For example :-
I have two timestamps i.e. start= 15-03-11 15:10:10 and finish=15-03-11 15:10:10 and i need to subtract them ("finish-start" ) in order to find the duration.
Because their difference is in nanosecond level, I need to have them into 15:10:10.000000001 and 15:10:10.000000015 respectively.
TIMESTAMP [(<nanosecond precision)]
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Attachments
Issue Links
- relates to
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MDEV-18843 Nanoseconds in MariaDB
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- Open
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