Open-ILS/src/perlmods/OpenILS/Application/Storage/Driver/Pg/fts.pm

   1 { # Every driver needs to provide a 'compile()' method to OpenILS::Application::Storage::FTS.
   2   # If that driver wants to support FTI, that is...
   3         #-------------------------------------------------------------------------------
   4         package OpenILS::Application::Storage::FTS;
   5         use OpenSRF::Utils::Logger qw/:level/;
   6         my $log = 'OpenSRF::Utils::Logger';
   7
   8         sub compile {
   9                 my $self = shift;
  10                 my $term = shift;
  11
  12                 $self = ref($self) || $self;
  13                 $self = bless {} => $self;
  14
  15                 $term =~ s/\pM//gos;
  16                 $self->decompose($term);
  17
  18                 my $newterm = join('&', $self->words);
  19
  20                 if (@{$self->nots}) {
  21                         $newterm = '('.$newterm.')&!('. join('|', $self->nots) . ')';
  22                 }
  23
  24                 $log->debug("Compiled term is [$newterm]", DEBUG);
  25                 $newterm = OpenILS::Application::Storage::Driver::Pg->quote($newterm);
  26                 $log->debug("Quoted term is [$newterm]", DEBUG);
  27
  28                 $self->{fts_query} = ["to_tsquery('default',$newterm)"];
  29                 $self->{fts_query_nots} = [];
  30                 $self->{fts_op} = '@@';
  31                 $self->{text_col} = shift;
  32                 $self->{fts_col} = shift;
  33
  34                 return $self;
  35         }
  36
  37         sub sql_where_clause {
  38                 my $self = shift;
  39                 my $column = $self->fts_col;
  40                 my @output;
  41
  42                 my @ranks;
  43                 for my $fts ( $self->fts_query ) {
  44                         push @output, join(' ', $self->fts_col, $self->{fts_op}, $fts);
  45                         push @ranks, "rank($column, $fts)";
  46                 }
  47                 $self->{fts_rank} = \@ranks;
  48
  49                 my $phrase_match = $self->sql_exact_phrase_match();
  50                 return join(' AND ', @output) . $phrase_match;
  51         }
  52
  53 }
  54
  55 1;