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https://issues.apache.org/jira/browse/SPARK-33391?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17228406#comment-17228406
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Apache Spark commented on SPARK-33391:
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User 'leanken' has created a pull request for this issue:
https://github.com/apache/spark/pull/30296
> element_at with CreateArray not respect one based index
> -------------------------------------------------------
>
> Key: SPARK-33391
> URL: https://issues.apache.org/jira/browse/SPARK-33391
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 3.1.0
> Reporter: Leanken.Lin
> Priority: Major
>
> var df = spark.sql("select element_at(array(3, 2, 1), 0)")
> df.printSchema()
> df = spark.sql("select element_at(array(3, 2, 1), 1)")
> df.printSchema()
> df = spark.sql("select element_at(array(3, 2, 1), 2)")
> df.printSchema()
> df = spark.sql("select element_at(array(3, 2, 1), 3)")
> df.printSchema()
> root
> |-- element_at(array(3, 2, 1), 0): integer (nullable = false)
> root
> |-- element_at(array(3, 2, 1), 1): integer (nullable = false)
> root
> |-- element_at(array(3, 2, 1), 2): integer (nullable = false)
> root
> |-- element_at(array(3, 2, 1), 3): integer (nullable = true)
>
> In this case, the nullable property in element_at with CreateArray statement
> is not correct.
>
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