Laabidi Raissi ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=557058%... ) *commented* on HHH-15544 ( https://hibernate.atlassian.net/browse/HHH-15544?atlOrigin=eyJpIjoiNDMzN2... ) Re: OrderColumn invalid value on add for LAZY entity ( https://hibernate.atlassian.net/browse/HHH-15544?atlOrigin=eyJpIjoiNDMzN2... ) Indeed, the issue is with the “int“ vs “Integer” types. What Hibernate does to store the rank value is: * insert the employee row * *select max(rank) + 1 from employee* by the dept_id * update the employee row inserted in 1) with the max+1 fetched in 2 Now if you have an “int” rank, the first employee to be inserted will have 0 rank (the default value for the int type in java). The max(rank) + 1 will return 1, and the updated value of the rank will be 1. Whereas, when Integer is used, the employee would have null as default rank. The max(rank) + 1 returned from DB will be *NULL*. And so the updated value of the rank will be 0. I don’t know if this is an intended behaviour or a bug. ( https://hibernate.atlassian.net/browse/HHH-15544#add-comment?atlOrigin=ey... ) Add Comment ( https://hibernate.atlassian.net/browse/HHH-15544#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#100207- sha1:520255c )