PSQLException syntax error when using values within an 'in' clause in Hibernate

Issue

• Executing an HQL / JPA query SELECT empl FROM Employee empl WHERE (empl.id) IN (VALUES (?1), (?2))

• The log records the below failure detail:

  ... WARN  [org.hibernate.engine.jdbc.spi.SqlExceptionHelper] (http-/127.0.0.1:8180-5) SQL Error: 0, SQLState: 42601
  ... ERROR [org.hibernate.engine.jdbc.spi.SqlExceptionHelper] (http-/127.0.0.1:8180-5) ERROR: syntax error at or near "$2"
     Position: ...
  ... ERROR [org.jboss.as.ejb3] (http-/127.0.0.1:8180-5) JBAS014268: Failure in caller transaction.: javax.persistence.PersistenceException: org.hibernate.exception.SQLGrammarException: could not extract ResultSet
      ...
  Caused by: org.hibernate.exception.SQLGrammarException: could not extract ResultSet
      at org.hibernate.exception.internal.SQLStateConversionDelegate.convert(SQLStateConversionDelegate.java:123)
      at org.hibernate.exception.internal.StandardSQLExceptionConverter.convert(StandardSQLExceptionConverter.java:49)
      at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:124)
      at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:109)
      at org.hibernate.engine.jdbc.internal.ResultSetReturnImpl.extract(ResultSetReturnImpl.java:88)
      at org.hibernate.loader.Loader.getResultSet(Loader.java:2062)
      ...
      at org.hibernate.ejb.QueryImpl.getResultList(QueryImpl.java:268)
      ...
  Caused by: org.postgresql.util.PSQLException: ERROR: syntax error at or near "$2"
    Position: ...
      at org.postgresql.core.v3.QueryExecutorImpl.receiveErrorResponse(QueryExecutorImpl.java:2198)
      at org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:1927)
      at org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:255)
      at org.postgresql.jdbc2.AbstractJdbc2Statement.execute(AbstractJdbc2Statement.java:561)
      at org.postgresql.jdbc2.AbstractJdbc2Statement.executeWithFlags(AbstractJdbc2Statement.java:419)
      at org.postgresql.jdbc2.AbstractJdbc2Statement.executeQuery(AbstractJdbc2Statement.java:304)
      at sun.reflect.GeneratedMethodAccessor225.invoke(Unknown Source)
      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java)
      at java.lang.reflect.Method.invoke(Method.java:498)
      at org.postgresql.ds.jdbc23.AbstractJdbc23PooledConnection$StatementHandler.invoke(AbstractJdbc23PooledConnection.java:453)
      at com.sun.proxy.$Proxy213.executeQuery(Unknown Source)
      at org.jboss.jca.adapters.jdbc.WrappedPreparedStatement.executeQuery(WrappedPreparedStatement.java:462)
      at org.hibernate.engine.jdbc.internal.ResultSetReturnImpl.extract(ResultSetReturnImpl.java:79)
      ...