To set a timestamp value in a PreparedStatement in UTC timezone one should use stmt.setTimestamp(1, t, Calendar.getInstance(TimeZone.getTimeZone(“UTC”))) The Timestamp value is always UTC, but not always the jdbc driver can automatically sent it correctly to the server. The third, Calendar, parameter helps the driver to correctly prepare the value for the server.
Actually the NHibernate reference states that the DateTime nhibernate type will store the .NET DateTime as an SQL datetime truncated at the second level (no millisecond granularity) As such it provides the Timestamp NHibernate type (type=”Timestamp” in the mapping) which will store a .NET DateTime as an SQL datetime without truncation. Note here that an … Read more
This will give you the time in seconds + microseconds #include <sys/time.h> struct timeval tv; gettimeofday(&tv,NULL); tv.tv_sec // seconds tv.tv_usec // microseconds
For ext2/3 and possibly for ext4 you can do this with debugfs tool, assuming you want to change the ctime of file /tmp/foo which resides in disk /dev/sda1 we want to set ctime to 201001010101 which means 01 January 2010, time 01:01: Warning: Disk must be unmounted before this operation # Update ctime debugfs -w … Read more
That is expected and documented behaviour: From the manual: Since these functions return the start time of the current transaction, their values do not change during the transaction. This is considered a feature: the intent is to allow a single transaction to have a consistent notion of the “current” time, so that multiple modifications within … Read more
You could convert the underlying datetime64[ns] values to datetime64[s] values using astype: In [11]: df[‘Time’] = df[‘Time’].astype(‘datetime64[s]’) In [12]: df Out[12]: Record_ID Time 0 94704 2014-03-10 07:19:19 1 94705 2014-03-10 07:21:44 2 94706 2014-03-10 07:21:45 3 94707 2014-03-10 07:21:54 4 94708 2014-03-10 07:21:55 Note that since Pandas Series and DataFrames store all datetime values as … Read more
to_date converts the input to a DATE type which does not support fractional seconds. To use fractional seconds you need to use a TIMESTAMP type which is created when using to_timestamp pst’s comment about the ff3 modifier is also correct. “Constant” values in the format mask need to be enclosed in double quote So the … Read more
You can typecast to int using astype(int) and divide it by 10**9 to get the number of seconds to the unix epoch start. import pandas as pd df = pd.DataFrame({‘time’: [pd.to_datetime(‘2019-01-15 13:25:43’)]}) df_unix_sec = pd.to_datetime(df[‘time’]).astype(int)/ 10**9 print(df_unix_sec)
Answering questions in reverse order: What is the difference between steady_clock vs system_clock in layman terms. If you’re holding a system_clock in your hand, you would call it a watch, and it would tell you what time it is. If you’re holding a steady_clock in your hand, you would call it a stopwatch, and it … Read more
Pete was almost correct but used the wrong syntax for ‘change’: ALTER TABLE mytable CHANGE `time` `time` TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP Notice that you must repeat the column name. Also, make sure you are using backticks instead of single quotes to escape the column name time, which prevents it from being interpreted as the … Read more