[burnoutgal]

There's lots of python libraries for graph visualization, it's probably force-directed layout or something else similar.

The name is indeed a reference to data warehouse design, where you normally have heavily normalized data in a snowflake schema. The Kimball book is the canonical one on data warehouse design.

[daveloyall]

Yep. This app, revj, uses Graphviz for layout. So, sure, force-directed layout.

The layout/rendering of the graphs isn't interesting to me, but parsing a SQL statement and extracting the relationship data is.