Re: BUG #5066: plperl issues with perl_destruct() and END blocks

On Mon, Sep 21, 2009 at 3:08 PM, Alvaro Herrera
<alvherre(at)commandprompt(dot)com> wrote:
> David Fetter escribió:
>> On Mon, Sep 21, 2009 at 01:06:17PM -0400, Alvaro Herrera wrote:
>
>> > The fine manual saith
>> >
>> >     You may have multiple "END" blocks within a file--they will
>> >     execute in reverse order of definition; that is: last in, first
>> >     out (LIFO).
>> >
>> > But then, why would we care?  We just call the destructor and Perl
>> > ensures that the blocks are called in the right order.
>>
>> This is not quite what I meant.  Let's say we have two or more different
>> PL/Perl functions executed over the course of a backend.  Which one's
>> END block gets executed last?
>
> I think the manual is quite clear on this point.  It talks about "files"
> which we don't have, but other than that it doesn't seem like there
> shouldn't be any problem.
>
> Now that I think about it, this only affects loaded modules, not the
> plperl functions themselves, right?  I mean, you can't define an END
> block inside a function.

You might think that, but it turns out the world of Perl is crazier
than the ordinary mind can fathom.

$ perl -e 'sub foo { END { print "hi\n" } }'
hi

...Robert