[ https://issues.apache.org/jira/browse/SPARK-28186?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16876386#comment-16876386
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Alex Kushnir commented on SPARK-28186:
--------------------------------------
I'm porting HIVE workload to SPARK. It works in HIVE as expected
select array_contains(array('a','b',null,'c'),'a'), array_contains(array('a','b',null,'c'),
'd')
returns true, false
> array_contains returns null instead of false when one of the items in the array is null
> ---------------------------------------------------------------------------------------
>
> Key: SPARK-28186
> URL: https://issues.apache.org/jira/browse/SPARK-28186
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 2.3.0
> Reporter: Alex Kushnir
> Priority: Major
>
> If array of items contains a null item then array_contains returns true if item is found
but if item is not found it returns null instead of false
> Seq(
> (1, Seq("a", "b", "c")),
> (2, Seq("a", "b", null, "c"))
> ).toDF("id", "vals").createOrReplaceTempView("tbl")
> spark.sql("select id, vals, array_contains(vals, 'a') as has_a, array_contains(vals,
'd') as has_d from tbl").show
> +----+---------++----------+
> |id|vals|has_a|has_d|
> +----+---------++----------+
> |1|[a, b, c]|true|false|
> |2|[a, b,, c]|true|null|
> +----+---------++----------+
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