Data types in Delta

Well, I did offer some advice as to why we still want to optimise data types.  The engine will provide the resources necesarry to process data operations based on data types and precision.  The bigger the data type and precision, the bigger the resources are used to process.  If you keep your data type sizes to a minimum, this will help the engine only provision what it needs.  

Also, if we define our tables with data type sizes in Delta, it will stick to the data type size (e.g. cannot declare a string as 100 and then insert 200 chars in)