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Posted to issues@spark.apache.org by "Apache Spark (JIRA)" <ji...@apache.org> on 2017/11/03 15:33:00 UTC
[jira] [Commented] (SPARK-22417) createDataFrame from a
pandas.DataFrame reads datetime64 values as longs
[ https://issues.apache.org/jira/browse/SPARK-22417?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16237772#comment-16237772 ]
Apache Spark commented on SPARK-22417:
--------------------------------------
User 'BryanCutler' has created a pull request for this issue:
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
> Priority: Normal
>
> 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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