Hibernate shows question marks in SQL query

Hibernate uses prepared statements so you can't see the full SQL. You can set the log level for org.hibernate.type to trace to see the values bound to the parameters.

Reference

• Hibernate 3.5 Core Documentation
  • 3.5. Logging
• Hibernate 4.1 Core Documentation
  • 4.1. Logging

(As mentioned in/see also this answer).