[colug-432] Show Parent/Child Relationships of Database Tables

[jep200404 at columbus.rr.com]

What program shows the parent/child relationships for all the 
tables of a database? I am looking for a program that would have 
plain text output, with one table name on each line, and 
indentation indicating the parent/child relationship 
in an outline kind of format.
I have not found good results searching the web,
not even of GUI tools. 

I am using postgresql, but a nice program would work with 
other database software, such as MariaDB, also.