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Posted to issues@spark.apache.org by "Apache Spark (JIRA)" <ji...@apache.org> on 2018/10/06 11:16:00 UTC
[jira] [Commented] (SPARK-25666) Internally document type
conversion between Python data and SQL types in UDFs
[ https://issues.apache.org/jira/browse/SPARK-25666?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16640686#comment-16640686 ]
Apache Spark commented on SPARK-25666:
--------------------------------------
User 'HyukjinKwon' has created a pull request for this issue:
https://github.com/apache/spark/pull/22655
> Internally document type conversion between Python data and SQL types in UDFs
> -----------------------------------------------------------------------------
>
> Key: SPARK-25666
> URL: https://issues.apache.org/jira/browse/SPARK-25666
> Project: Spark
> Issue Type: Documentation
> Components: PySpark
> Affects Versions: 2.4.0
> Reporter: Hyukjin Kwon
> Priority: Minor
>
> Currently, UDF's type coercion is not cleanly defined. See also https://github.com/apache/spark/pull/22610 and https://github.com/apache/spark/pull/22610
> This JIRA targets to describe the type conversion logic internally. For instance:
> {code}
> +---------------+----+----+----+----+----+------------------------------+------------------------------+----+---------------+---------+----------------------------+------------+----+------------+---------+---------+ # noqa
> | Type \ Value|None|True| 1| a| a| 1970-01-01| 1970-01-01 00:00:00| 1.0|array('i', [1])| [1]| (1,)| ABC| 1| {'a': 1}| Row(a=1)| Row(a=1)| # noqa
> +---------------+----+----+----+----+----+------------------------------+------------------------------+----+---------------+---------+----------------------------+------------+----+------------+---------+---------+ # noqa
> | null|None|None|None|None|None| None| None|None| None| None| None| None|None| None| X| X| # noqa
> | boolean|None|True|None|None|None| None| None|None| None| None| None| None|None| None| X| X| # noqa
> | tinyint|None|None| 1|None|None| None| None|None| None| None| None| None|None| None| X| X| # noqa
> | smallint|None|None| 1|None|None| None| None|None| None| None| None| None|None| None| X| X| # noqa
> | int|None|None| 1|None|None| None| None|None| None| None| None| None|None| None| X| X| # noqa
> | bigint|None|None| 1|None|None| None| None|None| None| None| None| None|None| None| X| X| # noqa
> | string|None|true| 1| a| a|java.util.GregorianCalendar...|java.util.GregorianCalendar...| 1.0| [I@2d03fe27| [1]|[Ljava.lang.Object;@5ae74a34| [B@6e96d01e| 1| {a=1}| X| X| # noqa
> | date|None| X| X| X| X| 1970-01-01| 1970-01-01| X| X| X| X| X| X| X| X| X| # noqa
> | timestamp|None| X| X| X| X| X| 1970-01-01 00:00:00| X| X| X| X| X| X| X| X| X| # noqa
> | float|None|None|None|None|None| None| None| 1.0| None| None| None| None|None| None| X| X| # noqa
> | double|None|None|None|None|None| None| None| 1.0| None| None| None| None|None| None| X| X| # noqa
> | array<int>|None|None|None|None|None| None| None|None| [1]| [1]| [1]|[65, 66, 67]|None| None| X| X| # noqa
> | binary|None|None|None| a| a| None| None|None| None| None| None| ABC|None| None| X| X| # noqa
> | decimal(10,0)|None|None|None|None|None| None| None|None| None| None| None| None| 1| None| X| X| # noqa
> |map<string,int>|None|None|None|None|None| None| None|None| None| None| None| None|None| {u'a': 1}| X| X| # noqa
> | struct<_1:int>|None| X| X| X| X| X| X| X| X|Row(_1=1)| Row(_1=1)| X| X|Row(_1=None)|Row(_1=1)|Row(_1=1)| # noqa
> +---------------+----+----+----+----+----+------------------------------+------------------------------+----+---------------+---------+----------------------------+------------+----+------------+---------+---------+ # noqa
> {code}
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