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nelsonjfrOct 31 2019 — edited Oct 31 2019

Good morning.

I accidentally dragged my left panel out of the screen and now I cannot put it back in!

Any ideas how to do it?

Thanks

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This post has been answered by nelsonjfr on Oct 31 2019
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EdStevens
948744 wrote:
Hi, 

I have been experimenting on exception handling in oracle plsql. During my experimentation I made the following anonymous plsql block.

<snip>

Did you notice the name of this particular forum?

Please close this thread and ask your question in 3077
BluShadow
Question now moved to Oracle Discussion Forums » Oracle Database » SQL and PL/SQL
BluShadow
Answer
The problem in your block 2 code is that you've not just used the same exception name, but you've assigned them with the same exception code. If the code is different then it will work...
SQL> set serverout on
SQL> ed
Wrote file afiedt.buf

  1  <<outer_block>>
  2  declare
  3      exc exception;
  4      pragma exception_init(exc,-20001);
  5  begin
  6      <<inner_block>>
  7      declare
  8          exc exception;
  9          pragma exception_init(exc,-20002);
 10      begin
 11          raise_application_error(-20002,'Error raised');
 12      exception
 13          when outer_block.exc then
 14              dbms_output.put_line('outer Exception caught ' );
 15          when inner_block.exc then
 16              dbms_output.put_line('Inner Exception caught ' );
 17      end;
 18* end;
SQL> /
Inner Exception caught

PL/SQL procedure successfully completed.

SQL> ed
Wrote file afiedt.buf

  1  <<outer_block>>
  2  declare
  3      exc exception;
  4      pragma exception_init(exc,-20001);
  5  begin
  6      <<inner_block>>
  7      declare
  8          exc exception;
  9          pragma exception_init(exc,-20002);
 10      begin
 11          raise_application_error(-20001,'Error raised');
 12      exception
 13          when outer_block.exc then
 14              dbms_output.put_line('outer Exception caught ' );
 15          when inner_block.exc then
 16              dbms_output.put_line('Inner Exception caught ' );
 17      end;
 18* end;
SQL> /
outer Exception caught

PL/SQL procedure successfully completed.
Marked as Answer by sudher · Sep 27 2020
BluShadow
Oh, and the reason for that is described here...

http://docs.oracle.com/cd/B19306_01/appdev.102/b14261/errors.htm#sthref2000

PRAGMA is a compiler directive, not a run time directive, so you can't re-assign the same code to different exceptions on-the-fly during execution of your code, hence why the code was complaining because it was considering your outer EXC and inner EXC to be the same code and hence you were effectively testing for the same exception value twice, regardless of you prefixing the name with the outer/inner labels.

You can certainly re-use exception names at run time and that follows standard variable scoping rules, but if you assign exception names to actual error code values, those need to be either unique or, if you've assigned multiple exception names to the same code you need to ensure you only test for one of them within your exception handlers.
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Added on Oct 31 2019
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