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https://issues.apache.org/jira/browse/HIVE-2615?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Zhuoluo (Clark) Yang updated HIVE-2615:
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Assignee: Zhuoluo (Clark) Yang
> CTAS with literal NULL creates VOID type
> ----------------------------------------
>
> Key: HIVE-2615
> URL: https://issues.apache.org/jira/browse/HIVE-2615
> Project: Hive
> Issue Type: Bug
> Reporter: David Phillips
> Assignee: Zhuoluo (Clark) Yang
>
> Create the table with a column that always contains NULL:
> {quote}
> hive> create table bad as select 1 x, null z from dual;
> {quote}
> Because there's no type, Hive gives it the VOID type:
> {quote}
> hive> describe bad;
> OK
> x int
> z void
> {quote}
> This seems weird, because AFAIK, there is no normal way to create a column of
> type VOID. The problem is that the table can't be queried:
> {quote}
> hive> select * from bad;
> OK
> Failed with exception java.io.IOException:java.lang.RuntimeException:
> Internal error: no LazyObject for VOID
> {quote}
> Worse, even if you don't select that field, the query fails at runtime:
> {quote}
> hive> select x from bad;
> ...
> FAILED: Execution Error, return code 2 from
> org.apache.hadoop.hive.ql.exec.MapRedTask
> {quote}
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