Xapian discuss - Jun 2017 - Test for the end of PostingIterator in perl?

Hi all. I want to iterate over all the documents in my database.

     my $pi = $db->postlist_begin("");
     while ("$pi" =~ qr/END/) {
         my $oldid = $pi->get_docid;
         $pi++;
	#...
	}

That used to work with Search::Xapian in perl version 1.2, but now with 
xapian-bindings-1.4.4 it does not seem to. How are you supposed to tell 
when you have reached the end of a postlist?

The above code now appears to segfault at get_docid, presumably because 
we went over the end of the list.

Thanks,
  - Alex Aminoff
    NBER

2017-06-06 20:13 GMT+02:00 Alex Aminoff <aminoff at nber.org>:
>
> Hi all. I want to iterate over all the documents in my database.
>
>
> ​​
> my $pi = $db->postlist_begin("");
>
> ​​
> while ("$pi" =~ qr/END/) {
>         my $oldid = $pi->get_docid;
>         $pi++;
>         #...
>         }
>
​There is also a postlist_end()​
​

​
​
while ($pi != $db->postlist_end("")) {​

should do the trick (not tested)


>
> That used to work with Search::Xapian in perl version 1.2, but now with
> xapian-bindings-1.4.4 it does not seem to. How are you supposed to tell
> when you have reached the end of a postlist?
>
> The above code now appears to segfault at get_docid, presumably because we
> went over the end of the list.
>
> Thanks,
>  - Alex Aminoff
>    NBER
>
>
​have a nice day
Felix​