Fakhri Nasibov ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=5afdbe0... ) *updated* an issue Hibernate ORM ( https://hibernate.atlassian.net/browse/HHH?atlOrigin=eyJpIjoiYjZmNzU5MGQz... ) / Bug ( https://hibernate.atlassian.net/browse/HHH-17018?atlOrigin=eyJpIjoiYjZmNz... ) HHH-17018 ( https://hibernate.atlassian.net/browse/HHH-17018?atlOrigin=eyJpIjoiYjZmNz... ) IllegalAurgumentException when trying to run window function HQL ( https://hibernate.atlassian.net/browse/HHH-17018?atlOrigin=eyJpIjoiYjZmNz... ) Change By: Fakhri Nasibov ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=5afdbe0... ) Query {noformat}select contact from (select numeredContact, row_number() over(partition by numeredContact.name, numeredContact.phone) as num from Contact numeredContact ) as contact where contact.num = 1{noformat} throws {noformat}Caused by: java.lang.IllegalArgumentException: Component at index 0 has no alias, but alias is required{noformat} Found this bug while usin spring data with spring boot 3 which using hibernate-core 6+ version. I prepared [reproducer project|https://github.com/fnasibov/WindiwedFunctionIssue] with hibernate(without spring) and with spring boot 3 [here|https://github.com/fnasibov/exploringStarters]. Same query but native work well, So as i debugged: component with index 0 has alias but when i try in debugger component.getAlias() it return null (added screenshot with debugger) in class org/hibernate/query/derived/AnonymousTupleType.java:59 Hope it wil be helpful ! !image-20230731-212312.png|width=1460,height=977! ( https://hibernate.atlassian.net/browse/HHH-17018#add-comment?atlOrigin=ey... ) Add Comment ( https://hibernate.atlassian.net/browse/HHH-17018#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#100233- sha1:b4f309b )