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

["Adam Kramer (JIRA)" <ji...@apache.org>]

BOOL types should implicitly cast to INT
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                 Key: HIVE-1703
                 URL: https://issues.apache.org/jira/browse/HIVE-1703
             Project: Hadoop Hive
          Issue Type: Improvement
          Components: Query Processor
            Reporter: Adam Kramer
            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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