[hibernate-issues] [Hibernate-JIRA] Resolved: (HHH-4787) AuditProperty.isNull() doesn't generate "tab.col is null" SQL clause as expected

AuditProperty.isNull() doesn't generate "tab.col is null" SQL clause as expected -------------------------------------------------------------------------------- Key: HHH-4787 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-4787 Project: Hibernate Core Issue Type: Bug Components: envers Affects Versions: 3.3.0.GA Environment: Hibernate 3.3.0.GA, Envers 1.2.2, HSQLDB Database Reporter: Eric Citaire Assignee: Adam Warski Priority: Critical Fix For: 3.6.4, 4.0.0.Alpha3 AuditProperty.isNull() generate a SQL condition like this : "tab.col=?" where the bind variable is mapped to a null value. This doesn't work : most database engines will return false in every case. It should use the "is null" test instead : "tab.col is null" http://en.wikipedia.org/wiki/SQL#Null_and_Three-Valued_Logic_.283VL.29