adding MARC Zsearch

git-svn-id: svn://svn.open-ils.org/ILS/trunk@2624 dcc99617-32d9-48b4-a31d-7c20da2025e4

diff --git a/Open-ILS/src/perlmods/OpenILS/Application/Storage/Publisher/metabib.pm b/Open-ILS/src/perlmods/OpenILS/Application/Storage/Publisher/metabib.pm
index 97d3064..8dbbc7b 100644 (file)
--- a/Open-ILS/src/perlmods/OpenILS/Application/Storage/Publisher/metabib.pm
+++ b/Open-ILS/src/perlmods/OpenILS/Application/Storage/Publisher/metabib.pm
@@ -1389,4 +1389,102 @@ for my $class ( qw/title author subject keyword series/ ) {
 }
 
 
+sub multi_Z_search_full_rec {
+       my $self = shift;
+       my $client = shift;
+
+       my %args = @_;  
+       my $class_join = $args{class_join} || 'AND';
+       my $limit = $args{limit} || 10;
+       my $offset = $args{offset} || 0;
+       my @binds;
+       my @selects;
+
+       my $limiter_count = 0;
+
+       for my $arg (@{ $args{searches} }) {
+               my $term = $$arg{term};
+               my $limiters = $$arg{restrict};
+
+               my ($index_col) = metabib::full_rec->columns('FTS');
+               $index_col ||= 'value';
+               my $search_table = metabib::full_rec->table;
+
+               my $fts = OpenILS::Application::Storage::FTS->compile($term, 'value',"$index_col");
+
+               my $fts_where = $fts->sql_where_clause();
+               my @fts_ranks = $fts->fts_rank;
+
+               my $rank = join(' + ', @fts_ranks);
+
+               my @wheres;
+               for my $limit (@$limiters) {
+                       push @wheres, "( tag = ? AND subfield LIKE ? AND $fts_where )";
+                       push @binds, $$limit{tag}, ($$limit{subfield} ? $$limit{subfield} : '_');
+                       $log->debug("Limiting query using { tag => $$limit{tag}, subfield => $$limit{subfield} }", DEBUG);
+               }
+               $limiter_count++;
+               my $where = join(' OR ', @wheres);
+
+               push @selects, "SELECT id, record, $rank as sum FROM $search_table WHERE $where";
+
+       }
+
+       my $metabib_record_descriptor = metabib::record_descriptor->table;
+
+       my $cj = 'HAVING COUNT(x.id) = ' . $limiter_count if ($class_join eq 'AND');
+       my $search_table =
+               '(SELECT x.record, sum(x.sum) FROM (('.
+                       join(') UNION ALL (', @selects).
+                       ")) x GROUP BY 1 $cj ORDER BY 2 DESC )";
+
+       my ($t_filter, $f_filter) = ('','');
+
+       if ($args{format}) {
+               my ($t, $f) = split '-', $args{format};
+               my @types = split '', $t;
+               my @forms = split '', $f;
+               if (@types) {
+                       $t_filter = ' AND rd.item_type IN ('.join(',',map{'?'}@types).')';
+               }
+
+               if (@forms) {
+                       $f_filter .= ' AND rd.item_form IN ('.join(',',map{'?'}@forms).')';
+               }
+               push @binds, @types, @forms;
+       }
+
+
+       my $select = <<"        SQL";
+               SELECT  f.record, f.sum
+               FROM    $search_table f,
+                       $metabib_record_descriptor rd
+               WHERE   rd.record = f.record
+                       $t_filter
+                       $f_filter
+       SQL
+
+
+       $log->debug("Search SQL :: [$select]",DEBUG);
+
+       my $recs = metabib::full_rec->db_Main->selectall_arrayref("$select;", {}, @binds);
+       $log->debug("Search yielded ".scalar(@$recs)." results.",DEBUG);
+
+       my $count = @$recs;
+       for my $rec (@$recs[$offset .. $offset + $limit - 1]) {
+               next unless ($$rec[0]);
+               my ($rid,$rank) = @$rec;
+               $client->respond( [$rid, sprintf('%0.3f',$rank), $count] );
+       }
+       return undef;
+}
+__PACKAGE__->register_method(
+       api_name        => 'open-ils.storage.metabib.full_rec.Zmulti_search',
+       method          => 'multi_Z_search_full_rec',
+       api_level       => 1,
+       stream          => 1,
+       cachable        => 1,
+);
+
+
 1;