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https://issues.apache.org/jira/browse/SPARK-17914?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Takuya Ueshin resolved SPARK-17914.
-----------------------------------
       Resolution: Fixed
    Fix Version/s: 2.3.0
                   2.2.1

Issue resolved by pull request 18252
[https://github.com/apache/spark/pull/18252]

> Spark SQL casting to TimestampType with nanosecond results in incorrect 
> timestamp
> ---------------------------------------------------------------------------------
>
>                 Key: SPARK-17914
>                 URL: https://issues.apache.org/jira/browse/SPARK-17914
>             Project: Spark
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 1.6.1
>            Reporter: Oksana Romankova
>            Assignee: Anton Okolnychyi
>             Fix For: 2.2.1, 2.3.0
>
>
> In some cases when timestamps contain nanoseconds they will be parsed 
> incorrectly. 
> Examples: 
> "2016-05-14T15:12:14.0034567Z" -> "2016-05-14 15:12:14.034567"
> "2016-05-14T15:12:14.000345678Z" -> "2016-05-14 15:12:14.345678"
> The issue seems to be happening in DateTimeUtils.stringToTimestamp(). It 
> assumes that only 6 digit fraction of a second will be passed.
> With this being the case I would suggest either discarding nanoseconds 
> automatically, or throw an exception prompting to pre-format timestamps to 
> microsecond precision first before casting to the Timestamp.



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