[jira] [Commented] (SPARK-16542) bugs about types that result an array of null when creating dataframe using python

["Apache Spark (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SPARK-16542?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15376614#comment-15376614 ] 

Apache Spark commented on SPARK-16542:
--------------------------------------

User 'zasdfgbnm' has created a pull request for this issue:
https://github.com/apache/spark/pull/14198

> bugs about types that result an array of null when creating dataframe using python
> ----------------------------------------------------------------------------------
>
>                 Key: SPARK-16542
>                 URL: https://issues.apache.org/jira/browse/SPARK-16542
>             Project: Spark
>          Issue Type: Bug
>          Components: PySpark, SQL
>            Reporter: Xiang Gao
>
> This is a bugs about types that result an array of null when creating dataframe using python.
> Python's array.array have richer type than python itself, e.g. we can have array('f',[1,2,3]) and array('d',[1,2,3]). Codes in spark-sql didn't take this into consideration which might cause a problem that you get an array of null values when you have array('f') in your rows.
> A simple code to reproduce this is:
> from pyspark import SparkContext
> from pyspark.sql import SQLContext,Row,DataFrame
> from array import array
> sc = SparkContext()
> sqlContext = SQLContext(sc)
> row1 = Row(floatarray=array('f',[1,2,3]), doublearray=array('d',[1,2,3]))
> rows = sc.parallelize([ row1 ])
> df = sqlContext.createDataFrame(rows)
> df.show()
> which have output
> +---------------+------------------+
> | doublearray| floatarray|
> +---------------+------------------+
> |[1.0, 2.0, 3.0]|[null, null, null]|
> +---------------+------------------+



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