Plsql_code_type NATIVE and DEBUG true??

Question

Hi,
In the documentation i've read that we can use pl/sql debugging tools for program units compiled for interpreted mode (but NOT for those compiled for native mode).
Then, if i have:
alter session set plsql_code_type=native
alter package my_pkg compile DEBUGWhy can i specify DEBUG? Because it is compiled in native mode, and in native mode we cannot use debugging, isn't it? The last statement shouldn't have cause an error?
Thanks

Answer 1

Roger,
When I says alter session set plsql_code_type=native; it means all subsequent automatic recompilations of that library unit will use native (machine code) compilation. Ok.
After that I says, alter package my_pkg compile DEBUG; it means I am going to compile the package with DEBUG option and DEBUG option says compiler to compile and generate the code for debugger. Here debugger will read the compiled code in native compilation.
There is no error, simply you are going to provide the native compiled code to debugger.
Here one more parameter plays big role :
PLSQL_DEBUG
PLSQL_DEBUG specifies whether or not PL/SQL library units will be compiled for debugging.
Values:
true - PL/SQL library units will be compiled for debugging
false - PL/SQL library units will be compiled for normal execution
When PLSQL_DEBUG is set to true, PL/SQL library units are always compiled INTERPRETED in order to be debuggable.
When the value of this parameter is changed, it has no effect on PL/SQL library units that have already been compiled. The value of this parameter is stored persistently with each library unit.
Regards
Girish Sharma