Created attachment 855112 [details]
Simple pure Hibernate Maven JUnit test

Description of problem:
When a composite key is used a "select count (distinct <entity_type>)" query fails to enclose the column names that make up the key attribute in parenthesis and the following exception is raised:


org.hibernate.exception.SQLGrammarException: could not extract ResultSet
	...
Caused by: org.postgresql.util.PSQLException: ERROR: function count(character varying, character varying) does not exist
  Hint: No function matches the given name and argument types. You might need to add explicit type casts.
  Position: 8

Version-Release number of selected component (if applicable):
EAP 6.1.1 and Hibernate 4.2.0.SP1

How reproducible:
Consistently

Steps to Reproduce:
1. Using Hibernate core libraries that include the fix for https://hibernate.atlassian.net/browse/HHH-7165 (introduced in Hibernate 4.1.2), create an entity with a composite key
2. Issue a "select count (distinct <entity_type>)" query

Actual results:
Raises exception above

Expected results:
Should return a numeric count

Additional info:
https://hibernate.atlassian.net/browse/HHH-8864