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Posted to issues@spark.apache.org by "Xiao Li (JIRA)" <ji...@apache.org> on 2018/04/09 06:56:00 UTC

[jira] [Updated] (SPARK-23924) High-order function: element_at

     [ https://issues.apache.org/jira/browse/SPARK-23924?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Xiao Li updated SPARK-23924:
----------------------------
    Summary: High-order function: element_at  (was: High-order function: element_at(array<E>, index) → E)

> High-order function: element_at
> -------------------------------
>
>                 Key: SPARK-23924
>                 URL: https://issues.apache.org/jira/browse/SPARK-23924
>             Project: Spark
>          Issue Type: Sub-task
>          Components: SQL
>    Affects Versions: 2.3.0
>            Reporter: Xiao Li
>            Priority: Major
>
> Ref: https://prestodb.io/docs/current/functions/array.html
> Returns element of array at given index. If index > 0, this function provides the same functionality as the SQL-standard subscript operator ([]). If index < 0, element_at accesses elements from the last to the first.



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