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

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 2.4.2, 3.0.0
• Fix Version/s: 3.2.3
• Component/s: criteria
• Assignee: Mark Struberg
• Reporter: Mark Struberg
• Created: 13/Apr/17 14:23
• Updated: 16/Mar/22 07:41

Description

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

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.

The code to reproduce this is

criteriaBuilder.countDistinct(path.get(attribute));