Please consider the following Dear software engineers imagine I have a simple ISA hierarchy: parent A with children B and C. So let's say we have the corresponding tables named "a", "b", "c" and (created with the help of the gii model creator) the classes A, B, C The following is a screenshot from MySQL workbench: ![MySQL workbench screenshot](http://s4.postimage.org/4tuwkm43d/Screenshot.pn...