[hibernate-issues] [JIRA] (HHH-15495) BINARY (and by extension UUID) is no longer comparable in Hibernate 6

Arne Theß ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=70121%3... ) *created* an issue Hibernate ORM ( https://hibernate.atlassian.net/browse/HHH?atlOrigin=eyJpIjoiNjkzNTc1YjI2... ) / Bug ( https://hibernate.atlassian.net/browse/HHH-15495?atlOrigin=eyJpIjoiNjkzNT... ) HHH-15495 ( https://hibernate.atlassian.net/browse/HHH-15495?atlOrigin=eyJpIjoiNjkzNT... ) BINARY (and by extension UUID) is no longer comparable in Hibernate 6 ( https://hibernate.atlassian.net/browse/HHH-15495?atlOrigin=eyJpIjoiNjkzNT... ) Issue Type: Bug Affects Versions: 6.1.2 Assignee: Unassigned Components: hibernate-core Created: 09/Sep/2022 06:42 AM Priority: Major Reporter: Arne Theß ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=70121%3... ) According to ArgumentTypesValidator.checkType() the types BINARY and UUID are not comparable. This means that trying to use the aggregator MAX or MIN on a UUID column while grouping (SELECT MAX(id) FROM x GROUP BY id) results in the error message “Parameter 1 of function max() has type COMPARABLE, but argument is of type java.util.UUID”. This is a problem, especially since mysql natively supports UUIDs since version 8. ( https://hibernate.atlassian.net/browse/HHH-15495#add-comment?atlOrigin=ey... ) Add Comment ( https://hibernate.atlassian.net/browse/HHH-15495#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#100206- sha1:d8a7a40 )