Marius K ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=70121%3... ) *commented* on HHH-16216 ( https://hibernate.atlassian.net/browse/HHH-16216?atlOrigin=eyJpIjoiOWJkYj... ) Re: SybaseASEDialect creates additional not null checks ( https://hibernate.atlassian.net/browse/HHH-16216?atlOrigin=eyJpIjoiOWJkYj... ) and this is not only limited to null checks in combination with parameters String hql = "select r from MyUser r where 1=1 and r.firstname = :firstname"; Query query = entityManager.createQuery(hql); query.setParameter("firstname", null); Object result = query.getSingleResult(); results in select m1_0.MY_USER_ID, m1_0.FIRSTNAME, m1_0.LASTNAME from MY_USER m1_0 where 1=1 and 1 is not null and 1 is not null and m1_0.FIRSTNAME=? and m1_0.FIRSTNAME is not null ( https://hibernate.atlassian.net/browse/HHH-16216#add-comment?atlOrigin=ey... ) Add Comment ( https://hibernate.atlassian.net/browse/HHH-16216#add-comment?atlOrigin=ey... ) Get Jira notifications on your phone! Download the Jira Cloud app for Android ( https://play.google.com/store/apps/details?id=com.atlassian.android.jira.... ) or iOS ( https://itunes.apple.com/app/apple-store/id1006972087?pt=696495&ct=Em... ) This message was sent by Atlassian Jira (v1001.0.0-SNAPSHOT#100217- sha1:65be9f2 )