If you are using Perl 5.10 you can use the given ... when construction. See perlsyn

Update: Sorry, read too fast. Let's try again:

All the

   foreach $id (keys %$HR_Cwnt)
   {
      if ($id =~ /.*?\.oracle.*?$/)
      {
        delete($$HR_Cwnt{$id});
      }
   }
[download]

Can be simplified using Tie::Hash::Regex to something like:

delete $HR_Cwnt->{/.*?\.oracle.*?$/}
[download]