Query on t_attribute returns empty result

[JoostN]

I have a small question, it is really a mystery for me:
Why would a simple query like "select * from t_attribute" return an empty result?
Selecting from t_object works normally.
Thanks!

[qwerty]

Most likely you don't have attributes...

q.

[JoostN]

I have a ConstraintBlock, if I show its properties in the GUI, I find a non-empty list of Constraints.
Because Constraints is a Collection under Attributes, I'm looking in t_attribute. Maybe I'm mislead?

[qwerty]

Constraints are not attributes, right? Element constraints are in t_objectconstraints. You'd better use the API if you don't know the tables...

q.

[JoostN]

I want to avoid iterating through my model using API calls and speed up my app using DB queries.
I should have looked further in the documentation to find the correct table, I was too quick in my conclusions.
Thanks for putting me on the right track!
Joost