Parsing Multiple DateTimes in USQL - u-sql

Question

So the file I am extracting has multiple instances of two different starting time formats. One start time is in zulu (UTC) format and another is in a standard dateTime format. So when I create a SELECT they both have to pass through it.
An example of my UTC startingTime is 2011-01-02T00:03:04.123Z
An example of a standard startingTime is 2011-Jan-20 01:15:37.000941 EST
I need some sort of dateTime.Parse that can handle them both and return it to me in the same style the second one 2011-Jan-20 01:15:37.000941 EST is in.
Currently I am using DateTime.Parse(StartingTime).ToString("yyyy-MMM-dd HH:mm:ss.fff) As StartingTime"
This works for Parsing the UTC time format but gives me an error when trying to Parse the other.
Any ideas?
Even if I don't get it to return to me exactly like this one 2011-Jan-20 01:15:37.000941 EST I'll take something that shows three figures of milli seconds ex: 2011-Jan-20 01:15:37.941 EST which is what my code does now.

Answer 1

If you only have this kind of date you can try this.
You can add more types on the IF statement!
DECLARE #func Func<string,string> = (s) => {
DateTime d;
if (DateTime.TryParse(s, out d))
{
TimeZoneInfo cstZone = TimeZoneInfo.FindSystemTimeZoneById("Eastern Standard Time");
d = DateTime.SpecifyKind(d, DateTimeKind.Unspecified);
DateTime cstTime = TimeZoneInfo.ConvertTime(d, cstZone, TimeZoneInfo.Utc);
return cstTime.ToString("yyyy-MMM-dd HH:mm:ss.ffffff EST");
}
return s;
};
#data =
SELECT data FROM
( VALUES
("2011-01-02T00:03:04.123Z")
,("2011-Jan-20 01:15:37.000941 EST")
) AS T(data);
#result =
SELECT #func(data) AS data FROM #data;
OUTPUT #result
TO "/test.txt"
USING Outputters.Tsv();