[jira] [Created] (OPENJPA-2694) Creating count(distinct x.field) fails when using CriteriaBuilder

["Mark Struberg (JIRA)" <ji...@apache.org>]

Mark Struberg created OPENJPA-2694:
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             Summary: Creating count(distinct x.field) fails when using CriteriaBuilder
                 Key: OPENJPA-2694
                 URL: https://issues.apache.org/jira/browse/OPENJPA-2694
             Project: OpenJPA
          Issue Type: Bug
          Components: criteria
    Affects Versions: 2.4.2, 3.0.0
            Reporter: Mark Struberg
            Assignee: Mark Struberg
             Fix For: 2.4.3, 3.0.0


when using CriteriaBuilder#countDistinct(path.get(attribute));
we end up with the following Exception in OpenJPA:

{quote}
org.apache.openjpa.persistence.ArgumentException: Failed to execute query "null". Check the query syntax for correctness. See nested exception for details.
	at org.apache.deltaspike.data.impl.criteria.CriteriaTest.should_create_count_criteria(CriteriaTest.java:366)
Caused by: java.lang.Exception: java.lang.RuntimeException: Can not find constructor for "class java.lang.Long" with argument types "[class java.lang.Long]" to fill data.
{quote}

The code to reproduce this is 

{source}
criteriaBuilder.countDistinct(path.get(attribute));
{source}



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