[jira] [Work started] (HIVE-15445) Subquery failing with ClassCastException

["Jesus Camacho Rodriguez (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HIVE-15445?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Work on HIVE-15445 started by Jesus Camacho Rodriguez.
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> Subquery failing with ClassCastException
> ----------------------------------------
>
>                 Key: HIVE-15445
>                 URL: https://issues.apache.org/jira/browse/HIVE-15445
>             Project: Hive
>          Issue Type: Bug
>    Affects Versions: 2.2.0
>            Reporter: Jesus Camacho Rodriguez
>            Assignee: Jesus Camacho Rodriguez
>
> To reproduce:
> {code:sql}
> CREATE TABLE table_7 (int_col INT);
> SELECT
> (t1.int_col) * (t1.int_col) AS int_col
> FROM (
> SELECT
> MIN(NULL) OVER () AS int_col
> FROM table_7
> ) t1
> WHERE
> (False) NOT IN (SELECT
> False AS boolean_col
> FROM (
> SELECT
> MIN(NULL) OVER () AS int_col
> FROM table_7
> ) tt1
> WHERE
> (t1.int_col) = (tt1.int_col));
> {code}
> The problem seems to be in the method that tries to resolve the subquery column _MIN(NULL)_. It checks the column inspector and ends up returning a constant descriptor instead of a column descriptor for _min(null)_.



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