[jira] [Assigned] (HIVE-1703) BOOL types should implicitly cast to INT

["Xuefu Zhang (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HIVE-1703?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Xuefu Zhang reassigned HIVE-1703:
---------------------------------

    Assignee: Xuefu Zhang

> BOOL types should implicitly cast to INT
> ----------------------------------------
>
>                 Key: HIVE-1703
>                 URL: https://issues.apache.org/jira/browse/HIVE-1703
>             Project: Hive
>          Issue Type: Improvement
>          Components: Query Processor
>            Reporter: Adam Kramer
>            Assignee: Xuefu Zhang
>            Priority: Minor
>
> From the Wiki:
> "Otherwise, the operator is probably a UDF/UDAF function. In that case, we will try to convert the parameters to the types that are accepted by the UDF/UDAF function. If the UDF/UDAF function is overloaded (with more than 1 implementations with different types), we will try to find the one with least number of type conversions needed."
> However,
> SELECT SUM(thing=otherthing) FROM table
> ...fails, because thing=otherthing is a bool, and there is no system by which BOOL would convert to INT, as it should. INT is higher precision, so this should always work. Explicit casting, SUM(CAST(thing=otherthing AS INT)) works just fine.
> (yes, in this simple case COUNT(1) WHERE thing=otherthing would do the job, but it serves to illustrate the bug.)



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