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Spark SQL incorrectly converts timezone

Using Scala 2.10.4 and spark 1.5.1 and spark 1.6

sqlContext.sql(
  """
    |select id,
    |to_date(from_utc_timestamp(from_unixtime(at), 'US/Pacific')),
    |from_utc_timestamp(from_unixtime(at), 'US/Pacific'),
    |from_unixtime(at),
    |to_date(from_unixtime(at)),
    | at
    |from events
    | limit 100
  """.stripMargin).collect().foreach(println)

--driver-java-options '-Duser.timezone=US/Pacific' Spark-Submit: --driver-java-options '-Duser.timezone=US/Pacific'

result:

[56d2a9573bc4b5c38453eae7,2016-02-28,2016-02-27 16:01:27.0,2016-02-28 08:01:27,2016-02-28,1456646487]
[56d2aa1bfd2460183a571762,2016-02-28,2016-02-27 16:04:43.0,2016-02-28 08:04:43,2016-02-28,1456646683]
[56d2aaa9eb63bbb63456d5b5,2016-02-28,2016-02-27 16:07:05.0,2016-02-28 08:07:05,2016-02-28,1456646825]
[56d2aab15a21fa5f4c4f42a7,2016-02-28,2016-02-27 16:07:13.0,2016-02-28 08:07:13,2016-02-28,1456646833]
[56d2aac8aeeee48b74531af0,2016-02-28,2016-02-27 16:07:36.0,2016-02-28 08:07:36,2016-02-28,1456646856]
[56d2ab1d87fd3f4f72567788,2016-02-28,2016-02-27 16:09:01.0,2016-02-28 08:09:01,2016-02-28,1456646941]

The time in the US / Pacific should be 2016-02-28 00:01:27etc., But something like it subtracts “8” hours twice

+8
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2 answers

after reading in subsequent years, the following conclusions are drawn:

  • Spark-Sql does not support date-time, nor does it support time
  • Using a timestamp is the only solution
  • from_unixtime(at) , , - . , from_unixtime ( )
  • from_utc_timestamp ( ) , 8 (-08: 00)
  • sql
+6

, , UDF.

( UTC)

val udfToDateUTC = udf((epochMilliUTC: Long) => {
  val dateFormatter = java.time.format.DateTimeFormatter.ofPattern("yyyy-MM-dd").withZone(java.time.ZoneId.of("UTC"))
  dateFormatter.format(java.time.Instant.ofEpochMilli(epochMilliUTC))
})

, .

+1

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