We use @ColumnTransformer on an entity for reads like:

"@ColumnTransformer(forColumn = "instance_label", read="case object_type_to when 'SERVER' then '' else create_instance_label(p_instance_label, id, packet_id) end")"

This results in this SQL query:

when 'SERVER' then ''
else create_this_.instance_label(p_this_.instance_label, id, packet_id)

So Hibernate prefixes every occurrence of "instance" with the this_. alias.

We tried several things, like escaping, custom dialect, ... however with no results and had to eventually revert to 5.2.17. The underlying database is MySQL