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https://issues.apache.org/jira/browse/SPARK-23909?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Herman van Hovell reassigned SPARK-23909:
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Assignee: Herman van Hovell
> High-order function: filter(array<T>, function<T, boolean>) → array<T>
> ----------------------------------------------------------------------
>
> Key: SPARK-23909
> URL: https://issues.apache.org/jira/browse/SPARK-23909
> Project: Spark
> Issue Type: Sub-task
> Components: SQL
> Affects Versions: 2.3.0
> Reporter: Xiao Li
> Assignee: Herman van Hovell
> Priority: Major
>
> Ref: https://prestodb.io/docs/current/functions/array.html
> Constructs an array from those elements of array for which function returns
> true:
> {noformat}
> SELECT filter(ARRAY [], x -> true); -- []
> SELECT filter(ARRAY [5, -6, NULL, 7], x -> x > 0); -- [5, 7]
> SELECT filter(ARRAY [5, NULL, 7, NULL], x -> x IS NOT NULL); -- [5, 7]
> {noformat}
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