[TYPO3-mvc] best way to query other database readonly from extbase extension

[Adrian Dymorz]

Hi Gerd,

as far as I understand you want to create an extbase extension to do 
some sort of calculation and output of data but without creating the 
models for the data you want to have your calculations based on.

That sounds like using extbase without the main part of it and without 
having the benefits you could get from using the MVC pattern.

I recommend you to
a.) either create an simple extension (using pibase to avoid unnecessary 
overhead) which accesses the external data using custom SQL queries, 
doing calculations and let them be displayed by a simple marker based 
template or
b.) do the work and create a model for every entity which should be use 
for the calculations. Accessing the data of an external system leads you 
to the challenge to implement a custom way for accessing the data.

Best regards
Adrian