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https://issues.apache.org/jira/browse/HIVE-27690?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Krisztian Kasa resolved HIVE-27690.
-----------------------------------
Fix Version/s: 4.0.0
Resolution: Fixed
Merged to master. Thanks [~lvegh] for review.
> Handle casting NULL literal to complex type
> -------------------------------------------
>
> Key: HIVE-27690
> URL: https://issues.apache.org/jira/browse/HIVE-27690
> Project: Hive
> Issue Type: Improvement
> Reporter: Krisztian Kasa
> Assignee: Krisztian Kasa
> Priority: Major
> Labels: pull-request-available
> Fix For: 4.0.0
>
>
> {{NULL}} literal values of a complex type column are treated as void typed
> literals.
> {code:java}
> create table explain_npe_map ( c1 map<string, string> );
> explain select c1 from explain_npe_map where c1 is null;
> {code}
> [https://github.com/apache/hive/blob/88bc8269a64d31eee372bf3602933c75283c686b/ql/src/test/results/clientpositive/llap/analyze_npe.q.out#L142]
> The goal of this patch is to use the original complex type:
> {code:java}
> Select Operator
> expressions: Const map<string,string> null (type:
> map<string,string>)
> {code}
> Void typed {{NULL}} literals makes CTAS statements are fail since the
> original complex type can not be inferred.
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