将日期字符串转换为 Postgres 时间戳时区格式

Question

I have the following date:

25-JAN-18 01.31.02 AM +00:00

and am trying to convert into a Postgres compatible timestamp with time zone format.

I am trying the following code to convert into the compatible format:

document.getElementById("parsedDate3").innerHTML = moment("25-JAN-18 01.31.02.923526 AM +00:00 ", "d-MMM-YY hh.mm.ss A Z");

But I am getting the output as

Mon Jan 01 2018 02:31:02 GMT+0100

Can anyone please help me with this.

Answer 1

You are using lower-case d which is for the day of the week, 0 (Sunday) through 6 (Saturday).

Use upper-case D instead, which is for the day of the month.

Note that Moment's formatting tokens are slightly different than in other libraries and languages, so check the chart in the docs carefully.

Also:

• In your code you have 6 extra digits following the seconds. If you need to account for those, use SSSSSS . Otherwise they are ignored.

• You shouldn't assign a Moment object directly to an HTML element's innerHTML property. Instead, call the .format() function on the Moment object first to generate a string. You can optionally pass an argument to this function, to control the output format.

Answer 2

You can simply do it in PostgreSQL:

SELECT to_timestamp('25-JAN-18 01.31.02.923526 AM +00:00', 'DD-MON-YY HH.MI.SS.US AM TZH:TZM');

         to_timestamp      
-------------------------------
 2018-01-25 02:31:02.923526+01
(1 row)

This will work for PostgreSQL v11 or better.

Earlier versions of to_timestamp cannot parse the time zone information yet.

If you need it to work on 9.6, and you know that the time zone is always going to be +00:00 , you could simple omit the TZH:TZM in the format string.