Lisp in SQL

Lets discuss writing Lisp interpreter on top of SQL.

I already did the reader part...
https://github.com/saniv/tsql_lisp/blob/master/lisp.sql

So in a nutshell relational Lisp would get you
(animal cat Name (lambda (Age) (< Age 3))
while SQL provides:
select * from Animals where 'animal_type' = 'cat' AND 'age' < 3


but I'm more interested in implementing usual imperative Lisp on top of SQL.