datetime - convert string with nanosecond into timestamp in spark -


is there way convert timestamp value nano seconds timestamp in spark. input csv file , timstamp value of format 12-12-2015 14:09:36.992415+01:00. code tried.

val date_raw_data = list((1, "12-12-2015 14:09:36.992415+01:00"))  val dateraw_df = sc.parallelize(date_raw_data).todf("id", "timestamp_value")  val ts = unix_timestamp($"timestamp_value", "mm-dd-yyyy hh:mm:ss.ffffffz").cast("double").cast("timestamp")  val date_df = dateraw_df.withcolumn("timestamp_conv", ts).show(false)

the output is

+---+-----------------------+---------------------+ |id |timestamp_value        |timestamp_conv       | +---+-----------------------+---------------------+ |1  |12-12-2015 14:09:36.992|null                 | +---+-----------------------+---------------------+

i able convert time stamp millisecond using format mm-dd-yyyy hh:mm:ss.sss. trouble nano second , timezone formats.

unix_timestamp won't here. event if parse string (afaik simpledateformat doesn't provide required formats), unix_timestamp has second precision (emphasis mine):

def unix_timestamp(s: column, p: string): column

convert time string given pattern (see [http://docs.oracle.com/javase/tutorial/i18n/format/simpledateformat.html]) unix time stamp (in seconds), return null if fail.

you have create own function parse data. rough idea:

import org.apache.spark.sql.functions._ import org.apache.spark.sql.column  def to_nano(c: column) = {   val r = "([0-9]{2}-[0-9]{2}-[0-9]{4} [0-9]{2}:[0-9]{2}:[0-9]{2})(\\.[0-9]*)(.*)$"   // seconds part   (unix_timestamp(     concat(       regexp_extract($"timestamp_value", r, 1),       regexp_extract($"timestamp_value", r, 3)     ), "mm-dd-yyyy hh:mm:ssxxx"   ).cast("decimal(38, 9)") +    // subsecond part   regexp_extract($"timestamp_value", r, 2).cast("decimal(38, 9)")).alias("value") }  seq("12-12-2015 14:09:36.992415+01:00").todf("timestamp_value")   .select(to_nano($"timestamp_column").cast("timestamp"))   .show(false)  // +--------------------------+ // |value                     | // +--------------------------+ // |2014-12-28 14:09:36.992415| // +--------------------------+

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