[jira] [Resolved] (SPARK-22417) createDataFrame from a pandas.DataFrame reads datetime64 values as longs

["Wenchen Fan (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SPARK-22417?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Wenchen Fan resolved SPARK-22417.
---------------------------------
       Resolution: Fixed
    Fix Version/s: 2.3.0

Issue resolved by pull request 19646
[https://github.com/apache/spark/pull/19646]

> createDataFrame from a pandas.DataFrame reads datetime64 values as longs
> ------------------------------------------------------------------------
>
>                 Key: SPARK-22417
>                 URL: https://issues.apache.org/jira/browse/SPARK-22417
>             Project: Spark
>          Issue Type: Bug
>          Components: PySpark
>    Affects Versions: 2.2.0
>            Reporter: Bryan Cutler
>             Fix For: 2.3.0
>
>
> When trying to create a Spark DataFrame from an existing Pandas DataFrame using {{createDataFrame}}, columns with datetime64 values are converted as long values.  This is only when the schema is not specified.  
> {code}
> In [2]: import pandas as pd
>    ...: from datetime import datetime
>    ...: 
> In [3]: pdf = pd.DataFrame({"ts": [datetime(2017, 10, 31, 1, 1, 1)]})
> In [4]: df = spark.createDataFrame(pdf)
> In [5]: df.show()
> +-------------------+
> |                 ts|
> +-------------------+
> |1509411661000000000|
> +-------------------+
> In [6]: df.schema
> Out[6]: StructType(List(StructField(ts,LongType,true)))
> {code}
> Spark should interpret a datetime64\[D\] value to DateType and other datetime64 values to TImestampType.



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