Xapian discuss - Sep 2007 - Segmentation fault using XapianDateValueRangeProcessor with php-bindings

Hello !!

  I'm having a little trouble with Xapian 1.0.2, with php-bindings.
I've built two scripts, the indexer with <opened_data> and
<closed_date> with YYYYMMDD format:

$objDatabase = new XapianWritableDatabase( './test',
DB_CREATE_OR_OVERWRITE );
$objDocument = new XapianDocument();
$objDocument->add_value( 1, <opened_date> );
$objDocument->add_value( 1, <closed_date> );
$objDocument->add_posting( <doc_word1>, <word_pos1> );
$objDocument->add_posting( <doc_word2>, <word_pos2> );
...
$objDocument->set_data( <doc_data> );
$objDatabase->add_document( $objDocument )

and the enquirer:

$objDatabase = new XapianDatabase( './test' );
$objStemmer = new XapianStem( 'spanish' );
$objEnquire = new XapianEnquire( $objDatabase );
$objParser = new XapianQueryParser();

$objParser->set_database( $objIndexDB );
$objParser->set_stemmer( $objStemmer );
$objParser->add_valuerangeprocessor( new XapianDateValueRangeProcessor(1) );
$objParser->set_default_op( OP_AND );

$objQuery = $objParser->parse_query( <query>,
XapianQueryParser::FLAG_BOOLEAN_ANY_CASE  );

$objEnquire->set_query( $objQuery );
$objEnquire->set_sort_by_value_then_relevance( 3, False );

$objMatches = $objEnquire->get_mset( 0, 10 );
...

  The enquirer scripts hits a 'Segmentation fault' when issuing
$objParser->parse_query(), with <query> 'example
20010101..20070101'.
It runs OK any query with other words or phrases except a range...
When I remove $objParser->add_valuerangeprocessor( ... ) it goes
flawless.

  Any clue ?? Thanks in advance.

Sebastian

On Wed, Sep 26, 2007 at 02:32:24PM -0300, Sebastian
wrote:
> $objParser->add_valuerangeprocessor( new
XapianDateValueRangeProcessor(1) );
Rewrite this as:

  $vrp = new XapianDateValueRangeProcessor(1);
  $objParser->add_valuerangeprocessor( $vrp );
> The enquirer scripts hits a 'Segmentation fault' when issuing
> $objParser->parse_query(), with <query> 'example
20010101..20070101'.
> It runs OK any query with other words or phrases except a range...
> When I remove $objParser->add_valuerangeprocessor( ... ) it goes
> flawless.
The issue is with the object lifetime.  With your original code, the
PHP XapianDateValueRangeProcessor object is garbage collected after the
call to add_valuerangeprocessor, and the underlying C++ object deleted.

It's arguably a bug in the bindings, but I'd like to address it in the
C++ API because it's annoying there too.  We need to come up with a
different reference counting approach though, as the one we use for
most Xapian classes doesn't allow them to be subclassed by the user.

Cheers,
    Olly