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https://issues.apache.org/jira/browse/SPARK-32789?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17221044#comment-17221044
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Aoyuan Liao commented on SPARK-32789:
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[~tuhren] Not sure if HIve supports wildcard for dictionary. From
documentation, star only works for array.
https://cwiki.apache.org/confluence/display/Hive/LanguageManual+UDF#LanguageManualUDF-get_json_object
> Wildcards not working in get_json_object
> ----------------------------------------
>
> Key: SPARK-32789
> URL: https://issues.apache.org/jira/browse/SPARK-32789
> Project: Spark
> Issue Type: Bug
> Components: PySpark
> Affects Versions: 2.4.4
> Reporter: Thomas Uhren
> Priority: Major
> Attachments: image-2020-09-03-13-22-38-569.png
>
>
> It seems that wildcards (star) are not supported when using
> {{get_json_object}}:
> {code:java}
> spark.sql("""select get_json_object('{"k":{"value":"abc"}}', '$.*.value') as
> j""").show()
> {code}
> This results in {{null}} while it should return 'abc'. It works if I replace
> * with 'k'.
> !image-2020-09-03-13-22-38-569.png!
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