could not extract ResultSet in hibernate

If you are trying to execute a query using Hibernate and are getting an error saying "could not extract ResultSet," it could be due to a few different issues:

  1. Your SQL query may be invalid or incorrect. Check the syntax of your query and make sure it is correct.

  2. There may be a problem with your database connection. Make sure that you have properly configured your Hibernate connection properties and that your database is running and accessible.

  3. The ResultSet may be closed. Make sure that you are accessing the ResultSet before it is closed.

  4. There may be a problem with the mapping of your objects to the database. Check the mapping of your objects to the database tables to make sure that they are correct.

  5. The ResultSet may be empty. Make sure that your query is returning results. If you are expecting a particular number of results and are not getting them, it could be due to a problem with your query.

If you are still having trouble after checking these things, you may want to enable Hibernate logging to get more information about the issue. You can do this by adding the following lines to your Hibernate configuration file:

log4j.logger.org.hibernate=DEBUG
log4j.logger.org.hibernate.SQL=DEBUG

This will log all Hibernate and SQL statements, which may help you to identify the cause of the problem.