[homebrewer]

Is this not what you want? Seems like it's part of the SQL standard.

https://www.postgresql.org/docs/19/ddl-property-graphs.html

[SkiFire13]

That only seems to change how the query is performed, not which kind of data can be returned.

For example how would you use it to return a list of events and, for each event, the list of attendees in that event?