Evaluating PL/SQL

Question

I am doing some work on evaluating PL/SQL using XML and i had to devise a means of evaluating PL/SQL. The evaluation has to be similar to the ones i have provided below. I am not sure if these suggestions are correct but i hope to put the evaluation results in a table and rate it by ticking easy, average or bad. I will then carry out some evaluation tests thanks to Steve's book "Building Oracle XML Applications". The tests will be based on examples used in the book with references of course. I came up with the following suggestions.
Easy Average Difficult
7Easy to understand
7Easy to learn
7Easy to operate
7Is it suitable with other languages?
7Does it produce accurate results?
7Is it interoperable?
7Is it secure?
7Is it easy to analyse?
7Response efficiency
Please does anyone have a better?

Answer 1

What about an approach like:
declare
s varchar2(256);
f varchar2(30) := '1 + 2';
v number;
begin
  s := 'begin :value := (' || f || '); end;';
  dbms_output.put_line( s );
  execute immediate s using out v;
  dbms_output.put_line( v );
end;I'm not sure offhand if the call to execute immediate requires a context switch if the statement is just an anonymous block instead of SQL.