Krisztian Kasa created HIVE-27690:
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Summary: 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
{{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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