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Posted to issues@spark.apache.org by "Apache Spark (JIRA)" <ji...@apache.org> on 2017/03/10 22:00:06 UTC
[jira] [Commented] (SPARK-19910) `stack` should not reject NULL
values due to type mismatch
[ https://issues.apache.org/jira/browse/SPARK-19910?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15905766#comment-15905766 ]
Apache Spark commented on SPARK-19910:
--------------------------------------
User 'dongjoon-hyun' has created a pull request for this issue:
https://github.com/apache/spark/pull/17251
> `stack` should not reject NULL values due to type mismatch
> ----------------------------------------------------------
>
> Key: SPARK-19910
> URL: https://issues.apache.org/jira/browse/SPARK-19910
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 2.0.0, 2.0.1, 2.1.0
> Reporter: Dongjoon Hyun
>
> Since `stack` function generates a table with nullable columns, it should allow mixed null values.
> {code}
> scala> sql("select stack(3, 1, 2, 3)").printSchema
> root
> |-- col0: integer (nullable = true)
> scala> sql("select stack(3, 1, 2, null)").printSchema
> org.apache.spark.sql.AnalysisException: cannot resolve 'stack(3, 1, 2, NULL)' due to data type mismatch: Argument 1 (IntegerType) != Argument 3 (NullType); line 1 pos 7;
> 'Project [unresolvedalias(stack(3, 1, 2, null), None)]
> +- OneRowRelation$
> {code}
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