in PostgreSQL 10 version was removed param: sql_inheritance. Robert Haas was explained why was this happend. Hovewer, we are using PostgreSQL since 2004 and using some other developers replication system for which this param was important. This is one thing. Other thing is that our software was unable to make upgrade because one of sql upgrade script use sql_inheritance. So we cant do that. At this moment we are unable to do upgrade our software because of not compatible with older version. We cant offer new PostgreSQL version because of error in our upgrade system.
Is it possible to bring it back?
For us is very important to do compatible software with older versions.