Oracle test

Question 1

Please check file SQL_queries.sql

Question 2

Please check Java classes under com.fscandelli.syntaxtree package.

Final questions and answers:

[Q] Is it possible that in some cases calculation is not finite?
[A] Yes, for example when symbol expressions refer each other in a circular dependency

[Q] If so, how would you adjust your code to avoid such a situation?
[A] By introducing a validation in the constructor of ExpressionMap to avoid the presence of a symbol expression that introduces circular dependency