5 use ID3FS::PathElement::Artist;
6 use ID3FS::PathElement::Album;
7 use ID3FS::PathElement::Boolean;
8 use ID3FS::PathElement::File;
9 use ID3FS::PathElement::Tag;
10 use ID3FS::PathElement::Tagval;
11 use ID3FS::Path::Node;
13 our ($STATE_INVALID, $STATE_ROOT, $STATE_TAG, $STATE_TAGVAL,
14 $STATE_BOOLEAN, $STATE_ALBUMS, $STATE_TRACKLIST,
15 $STATE_FILE, $STATE_ALL)=(0..8);
17 our %priorities=( "OR" => 0, "AND" => 1, "NOT" => 2 );
22 my $class=ref($proto) || $proto;
30 # print "STATE: ", $self->state(), "\n";
37 if(($self->state() == $STATE_FILE) ||
38 ($self->state() == $STATE_INVALID))
48 return 1 if($self->state() == $STATE_FILE);
55 return($self->state() != $STATE_INVALID);
60 my($self, $mountpoint)=@_;
61 if($self->state() == $STATE_FILE)
63 return $self->filename($mountpoint, $self);
65 return "ERROR"; #should never happen?
73 my $state=$self->state();
74 # print "DIRENTS: STATE: $state\n";
75 # print "DIRENTS: FILE: $self->{path}\n";
76 if($state==$STATE_ALL)
78 push(@dents, qw(TRACKS NOARTIST), $self->artists());
80 elsif($state==$STATE_TAG || $state==$STATE_TAGVAL)
82 my $tag=$self->tail();
83 if($state==$STATE_TAG &&
85 ref($tag) eq "ID3FS::PathElement::Tag" &&
86 $self->{db}->tag_has_values($tag->{id}))
92 push(@dents, qw(AND OR TRACKS NOARTIST), $self->artists());
95 elsif($state==$STATE_BOOLEAN)
97 my $parent=$self->tail();
98 unless(defined($parent) &&
99 ref($parent) eq "ID3FS::PathElement::Boolean" &&
100 $parent->{name} eq "NOT")
104 push(@dents, $self->tags());
106 elsif($state==$STATE_ROOT)
108 @dents=(qw(ALL NOT), $self->tags());
110 elsif($state==$STATE_ALBUMS)
112 @dents=(qw(TRACKS NOALBUM),$self->albums());
114 elsif($state==$STATE_TRACKLIST)
116 @fents=$self->tracks();
120 print "DIRENTS: UNHANDLED STATE: $state\n";
122 return(\@dents, \@fents);
128 @{$self->{components}}=split(/\//, $self->{path});
129 shift @{$self->{components}}; # drop empty field before leading /
130 # print "PATH: $self->{path}\n";
131 $self->state($STATE_ROOT);
132 return if($self->{path} eq "/");
133 my @parts=@{$self->{components}};
135 $self->{elements}=[];
140 while(defined(my $name=shift @parts))
142 # print "NAME: $name\n";
143 my $state=$self->state();
144 if($state==$STATE_INVALID)
146 # print "SM: INVALID: $name\n";
149 elsif($state==$STATE_ROOT)
151 # print "SM: ROOT: $name\n";
155 $self->state($STATE_ALL);
157 elsif($name eq "NOT")
160 push(@{$self->{elements}}, ID3FS::PathElement::Boolean->new($self->{db}, $name));
161 $self->state($STATE_BOOLEAN);
165 $tag=ID3FS::PathElement::Tag->new($self->{db}, $name);
168 push(@{$self->{elements}}, $tag);
170 $self->state($STATE_TAG);
174 $self->state($STATE_INVALID);
178 elsif($state==$STATE_TAG || $state==$STATE_TAGVAL)
180 # print "SM: TAG/TAGVAL($state): $name\n";
181 my $tag=$self->tail();
182 if($state==$STATE_TAG &&
184 ref($tag) eq "ID3FS::PathElement::Tag" &&
185 $self->{db}->tag_has_values($tag->{id}))
187 # print "Parsing: parent: $tag->{id}\n";
188 my $tagval=ID3FS::PathElement::Tag->new($self->{db}, $name, $tag->{id});
191 $self->state($STATE_TAGVAL);
193 push(@{$self->{elements}}, $tagval);
197 $self->state($STATE_INVALID);
200 elsif($name eq "TRACKS")
202 $self->state($STATE_TRACKLIST);
204 elsif($name eq "NOARTIST")
206 $self->state($STATE_TRACKLIST);
208 elsif($name eq "AND")
210 $self->state($STATE_BOOLEAN);
211 push(@{$self->{elements}}, ID3FS::PathElement::Boolean->new($self->{db}, $name));
215 $self->state($STATE_BOOLEAN);
216 push(@{$self->{elements}}, ID3FS::PathElement::Boolean->new($self->{db}, $name));
220 my $artist=ID3FS::PathElement::Artist->new($self->{db}, $name);
223 push(@{$self->{elements}}, $artist);
224 $self->state($STATE_ALBUMS);
228 $self->state($STATE_INVALID);
232 elsif($state==$STATE_BOOLEAN)
234 # print "SM: BOOLEAN: $name\n";
235 my $parent=$self->tail();
237 if(defined($parent) &&
238 ref($parent) eq "ID3FS::PathElement::Boolean" &&
239 $parent->{name} eq "NOT")
243 if($allownot && $name eq "NOT")
245 $self->state($STATE_BOOLEAN);
246 push(@{$self->{elements}}, ID3FS::PathElement::Boolean->new($self->{db}, $name));
250 my $tag=ID3FS::PathElement::Tag->new($self->{db}, $name);
253 push(@{$self->{elements}}, $tag);
255 $self->state($STATE_TAG);
259 $self->state($STATE_INVALID);
263 elsif($state==$STATE_ALBUMS)
265 # print "SM: ALBUM: $name\n";
266 if($name eq "TRACKS")
268 $self->state($STATE_TRACKLIST);
270 elsif($name eq "NOALBUM")
272 $self->state($STATE_TRACKLIST);
276 my $album=ID3FS::PathElement::Album->new($self->{db}, $name);
279 push(@{$self->{elements}}, $album);
280 $self->state($STATE_TRACKLIST);
284 $self->state($STATE_INVALID);
288 elsif($state==$STATE_TRACKLIST)
290 # print "SM: TRACKLIST: $name\n";
291 my $track=ID3FS::PathElement::File->new($self->{db}, $name);
294 push(@{$self->{elements}}, $track);
295 $self->state($STATE_FILE);
299 $self->state($STATE_INVALID);
302 elsif($state==$STATE_FILE)
304 # print "SM: FILE: $name\n";
305 # Can't have anything after a filename
306 $self->state($STATE_INVALID);
308 elsif($state==$STATE_ALL)
310 if($name eq "TRACKS")
312 $self->state($STATE_TRACKLIST);
314 elsif($name eq "NOARTIST")
316 $self->state($STATE_TRACKLIST);
320 my $artist=ID3FS::PathElement::Artist->new($self->{db}, $name);
323 push(@{$self->{elements}}, $artist);
324 $self->state($STATE_ALBUMS);
328 $self->state($STATE_INVALID);
334 print "SM: ERROR: UNKNOWN STATE: $self->{state}\n";
335 $self->state($STATE_INVALID);
339 if($root_not && ($tags_seen < 2))
344 # remove trailing boolean
345 my @elements=@{$self->{elements}};
346 while(@elements && ref($elements[$#elements]) eq "ID3FS::PathElement::Boolean")
350 # sort elements by precedence
351 @elements=$self->sort_elements(@elements);
352 $self->{tagtree}=$self->elements_to_tree(\@elements);
355 ($self->{sqlconditions},
356 $self->{joins}) = $self->{tagtree}->to_sql();
357 # print "TREE: ", $self->{tagtree}->print(), "\n";
358 # print("SQL CONDITION(", scalar(@{$self->{joins}}), "): ",
359 # $self->{sqlconditions}, "\n");
361 # print Dumper $self->{tagtree};
367 my($self, $newstate)=@_;
368 $self->{state}=$newstate if(defined($newstate));
369 return $self->{state};
374 my($self, $elements)=@_;
375 return undef unless(@$elements);
376 my ($left, $right, $op)=(undef, undef, undef);
377 my $thing=pop @$elements;
378 if(ref($thing) eq "ID3FS::PathElement::Boolean")
381 $right=$self->elements_to_tree($elements);
382 if($op->{name} ne "NOT")
384 $left=$self->elements_to_tree($elements);
386 return ID3FS::Path::Node->new($left, $op, $right);
390 return ID3FS::Path::Node->new($thing);
394 # Dijkstra's shunting-yard algorithm
397 my ($self, @input)=@_;
400 # print "INPUT: ", join(', ', map { $_->{name}; } @input), "\n";
401 while(my $thing = shift @input)
403 if(ref($thing) eq "ID3FS::PathElement::Tag")
405 # Handle tag values by dropping parent
406 if(@input && ref($input[0]) eq "ID3FS::PathElement::Tag")
410 push(@output, $thing);
412 elsif(ref($thing) eq "ID3FS::PathElement::Boolean")
416 ($priorities{$thing->{name}} <= $priorities{$opstack[$#opstack]->{name}}))
418 push(@output, pop(@opstack));
420 push(@opstack, $thing);
425 push(@output, pop(@opstack));
427 # print "STACK: ", join(', ', map { $_->{name}; } @output), "\n";
434 return() unless(defined($self->{tagtree}));
435 return($self->{tagtree}->used_tags());
441 my $tail=$self->tail();
442 if($tail && ref($tail) eq "ID3FS::PathElement::Tag")
444 return($self->{db}->tag_has_values($tail->{id}));
451 my $tail=$self->tail();
452 if($tail && ref($tail) eq "ID3FS::PathElement::Tag")
459 sub trailing_tag_parent
462 my $tail=$self->tail();
463 if($tail && ref($tail) eq "ID3FS::PathElement::Tag")
465 return($tail->{parents_id});
473 return($self->{elements}->[$#{$self->{elements}}]);
476 # the one before last
480 return($self->{elements}->[($#{$self->{elements}}) - 1]);
483 ######################################################################
488 if(!$self->{tagtree}) # / or /NOT # FIXME: /ALL too?
490 my $sql="SELECT DISTINCT name FROM tags WHERE parents_id='';";
491 return($self->{db}->cmd_firstcol($sql));
493 my $hasvals=$self->tag_has_values();
494 my $parent=$self->trailing_tag_parent();
495 # print "THASVALS: $hasvals\n";
496 # print "TPARENT: ", (defined($parent)? $parent : "NO"), "\n";
498 my $sql=("SELECT tags.name FROM (\n" .
499 $self->tags_subselect() .
501 "INNER JOIN files_x_tags ON subselect.files_id=files_x_tags.files_id\n" .
502 "INNER JOIN tags ON files_x_tags.tags_id=tags.id\n");
503 my @allused=$self->used_tags();
504 my @used=grep { ref($_) ne "ARRAY"; } @allused;
505 my @used_with_vals=grep { ref($_) eq "ARRAY"; } @allused;
506 # print "tags(): USED: ", join(", ", @used), "\n";
507 # print "tags(): USED_WITH_VALS: ", join(", ", map { "[".$_->[0]. ", ".$_->[1]."]";} @used_with_vals), "\n";
510 my $id=$self->trailing_tag_id();
513 # print "HAS_VALUES\n";
514 my @values=map { "'".$_->[1]."'"; } grep { $_->[0] == $id; } @used_with_vals;
515 my $clause="(tags.parents_id='$id'";
518 $clause .= " AND tags.id NOT IN (" . join(', ', @values) . ")";
521 push(@andclauses, $clause);
525 # print "HASNT VALUES\n";;
528 push(@andclauses, "(NOT (tags.parents_id='' AND tags.id IN (" . join(', ', @used) . ")))");
530 for my $pair (@used_with_vals)
532 push(@andclauses, "(NOT (tags.parents_id='" . $pair->[0] . "' AND tags.id='" . $pair->[1] . "'))");
536 my $parentclause= "(tags.parents_id='";
539 $parentclause .= $id;
543 $parentclause .= $parent;
545 $parentclause .= "')";
546 push(@andclauses, $parentclause);
550 push(@andclauses, '( ' . join(' OR ', @orclauses) . ' )');
554 $sql .= "WHERE " . join(' AND ', @andclauses) . "\n";
556 $sql .= "GROUP BY tags.name;";
557 print "SQL(TAGS): $sql\n";
558 my @tagnames=$self->{db}->cmd_firstcol($sql);
559 print "SUBNAMES: ", join(', ', @tagnames), "\n";
565 my($self, $tagid)=@_;
566 my $sql=("SELECT DISTINCT name FROM tags\n" .
567 "WHERE parents_id=?");
568 my @tags=$self->{db}->cmd_firstcol($sql, $tagid);
569 @tags=map { length($_) ? $_ : "NOVALUE"; } @tags;
576 if(!@{$self->{elements}}) # /ALL
578 my $sql="SELECT DISTINCT name FROM artists WHERE name!='';";
579 return($self->{db}->cmd_firstcol($sql));
582 my $sql=("SELECT artists.name FROM (\n" .
583 $self->tags_subselect() .
585 "INNER JOIN files ON subselect.files_id=files.id\n" .
586 "INNER JOIN artists ON files.artists_id=artists.id\n" .
587 "WHERE artists.name != ''\n" .
588 "GROUP BY artists.name;");
589 print "SQL(ARTISTS): $sql\n";
590 my @tagnames=$self->{db}->cmd_firstcol($sql);
591 print "ARTISTS: ", join(', ', @tagnames), "\n";
599 my $tail=$self->tail();
600 # FIXME: rework PathElements
601 if(ref($tail) eq "ID3FS::PathElement::Artist")
603 return $self->artist_albums($tail->{id});
608 $sql="SELECT name FROM albums";
612 $sql=("SELECT albums.name\n" .
614 $self->tags_subselect() .
615 "\t) AS subselect\n" .
616 "INNER JOIN files ON subselect.files_id=files.id\n" .
617 "INNER JOIN albums ON files.albums_id=albums.id\n" .
618 "WHERE albums.name != ''\n" .
619 "GROUP BY albums.name;");
621 print "SQL(ALBUMS): \n$sql\n";
622 my @names=$self->{db}->cmd_firstcol($sql);
623 print "ALBUMS: ", join(', ', @names), "\n";
629 my($self, $artist_id)=@_;
630 my $sql="SELECT albums.name FROM ";
638 $self->tags_subselect() .
640 "INNER JOIN files ON subselect.files_id=files.id\n");
642 $sql .= ("INNER JOIN albums ON albums.id=files.albums_id\n" .
643 "INNER JOIN artists ON artists.id=files.artists_id\n" .
644 "WHERE artists.id=? and albums.name <> ''\n" .
645 "GROUP BY albums.name\n");
646 print "ARTIST_ALBUMS SQL: $sql\n";
647 my @albums=$self->{db}->cmd_firstcol($sql, $artist_id);
648 print "ALBUMS: ", join(', ', @albums), "\n";
654 my($self, $artist_id)=@_;
655 my $sql="SELECT files.name FROM ";
663 $self->tags_subselect() .
664 "\t) AS subselect\n" .
665 "INNER JOIN files ON subselect.files_id=files.id\n");
667 $sql .= ("INNER JOIN artists ON artists.id=files.artists_id\n" .
668 "INNER JOIN albums ON albums.id=files.albums_id\n" .
669 "WHERE artists.id=? AND albums.name=''\n" .
670 "GROUP BY files.name\n");
671 print "ARTIST_TRACKS SQL: $sql\n";
672 my @names=$self->{db}->cmd_firstcol($sql, $artist_id);
673 print "ARTISTTRACKS: ", join(', ', @names), "\n";
679 my($self, $artist_id, $album_id)=@_;
680 my $sql=("SELECT files.name FROM files\n" .
681 "INNER JOIN albums ON albums.id=files.albums_id\n" .
682 "INNER JOIN artists ON artists.id=files.artists_id\n" .
683 "WHERE artists.id=? AND albums.id=?\n" .
684 "GROUP BY files.name\n");
685 print "ALBUM_TRACKS SQL($artist_id, $album_id): $sql\n";
686 my @names=$self->{db}->cmd_firstcol($sql, $artist_id, $album_id);
687 print "TRACKS: ", join(', ', @names), "\n";
694 # FIXME: rework PathElements
695 my $tail=$self->tail();
696 if(ref($tail) eq "ID3FS::PathElement::Artist")
698 return $self->artist_tracks($tail->{id});
700 elsif(ref($tail) eq "ID3FS::PathElement::Album")
703 my $artist=$self->tail_parent();
704 if(defined($artist) && (ref($artist) eq "ID3FS::PathElement::Artist"))
706 # should always happen
707 $artist_id=$artist->{id};
709 return $self->album_tracks($artist_id, $tail->{id});
711 my $sql="SELECT files.name FROM ";
719 $self->tags_subselect() .
721 "INNER JOIN files ON files.id=subselect.files_id\n");
723 $sql .= "INNER JOIN artists ON files.artists_id=artists.id\n";
724 if($self->{components}->[$#{$self->{components}}] eq "NOARTIST")
726 $sql .= "WHERE artists.name =''\n";
728 $sql .= "GROUP BY files.name;";
729 print "TRACKS SQL($self->{path}): $sql\n";
730 my @names=$self->{db}->cmd_firstcol($sql);
731 print "TRACKS: ", join(', ', @names), "\n";
737 my($self, $mountpoint)=@_;
738 my $tail=$self->tail();
739 if(ref($tail) eq "ID3FS::PathElement::File")
742 my $sql=("SELECT paths.name, files.name FROM files\n" .
743 "INNER JOIN paths ON files.paths_id=paths.id\n" .
744 "WHERE files.id=?\n" .
745 "GROUP BY paths.name, files.name");
746 print "FILENAME SQL: $sql\n";
747 my ($path, $name)=$self->{db}->cmd_onerow($sql, $id);
748 my $id3fs_path=join('/', map { $_->{name}; } @{$self->{elements}});
749 return($self->{db}->relativise($path, $name, $mountpoint, $id3fs_path));
751 die("DB::filename: unhandled case\n"); #FIXME
757 my $hasvals=$self->tag_has_values();
758 # we need to specially handle a bare /NOT/tag with no other clauses,
759 # using a simple WHERE id !='tagid' instead of a LEFT JOIN
760 if($self->{bare_not})
762 return $self->bare_not_subselect();
766 return "\tSELECT id FROM files AS files_id\n";
768 my $tree=$self->{tagtree};
769 my $parent=$self->trailing_tag_parent();
771 # print "ELEMENTS: ", join('/', map { $_->{name}; } @{$self->{elements}}), "\n";
772 # print "TREE: ", $tree->print(), "\n";
776 $tag=$self->trailing_tag_id();
777 # print "Trailing id: $tag\n";
779 my ($sqlclause, @joins)=(undef, ());
780 ($sqlclause, @joins) = $tree->to_sql() if($tree);
781 # print "SQL(" . scalar(@joins) .": $sqlclause\n";
782 my $sql="\tSELECT fxt1.files_id FROM tags t1";
785 # $joinsneeded++ if($tag);
786 for(my $i=0; $i <= $#joins; $i++)
790 my $inner=("\t$join JOIN files_x_tags fxt$cnt ON " .
791 "t${cnt}.id=fxt${cnt}.tags_id");
794 push(@crosses, "CROSS JOIN tags t$cnt");
795 $inner .= " AND fxt1.files_id=fxt${cnt}.files_id";
797 push(@inners, $inner);
799 $sql .= ("\n\t" . join(" ", @crosses)) if(@crosses);
800 $sql .= ("\n" . join("\n", @inners)) if(@inners);
801 $sql .= "\n\tWHERE $sqlclause" if($sqlclause);
804 # $sql .= " AND t${joinsneeded}.parents_id='$tag'";
806 $sql .= "\n\tGROUP BY fxt1.files_id\n";
810 sub bare_not_subselect
813 my @tags=grep { ref($_) eq "ID3FS::PathElement::Tag"; } @{$self->{elements}};
814 my $sql=("\tSELECT f1.id AS files_id FROM files f1 WHERE f1.id NOT IN (\n" .
815 "\t\tSELECT fxt1.files_id FROM tags t1\n" .
816 "\t\tINNER JOIN files_x_tags fxt1 ON t1.id=fxt1.tags_id\n" .
818 if(scalar(@tags) > 1)
820 $sql .= ("(t1.parents_id='" . $tags[0]->{id} . "' AND t1.id='" .
821 $tags[1]->{id} . "')");
825 $sql .= ("(t1.parents_id='' AND t1.id='" . $tags[0]->{id} . "')");
827 $sql .= "\n\t\tGROUP BY fxt1.files_id\n\t)\n";
831 sub tags_subselect_and_not
833 my($self,@constraints)=@_;
834 my ($tags, $tags_vals, $parent)=$self->constraints_tag_list(@constraints);
836 my @tags_vals=@$tags_vals;;
844 $sql="\tSELECT fxt" . scalar(@tags) . ".files_id FROM files_x_tags fxt1\n";
845 push(@andclauses, "\t\tfxt${cnt}.tags_id=$tag");
849 $sql .= ("\tLEFT JOIN files_x_tags fxt$cnt ON fxt" .
850 ($cnt-1) . ".files_id=fxt${cnt}.files_id\n");
851 push(@andclauses, "\t\tfxt${cnt}.tags_id IS NULL");
853 print "AND: @andclauses\n";
858 $sql .= "\tWHERE\n\t\t";
859 $sql .= join(" AND\n\t\t", @andclauses) . "\n";
861 $sql .= "\tGROUP BY fxt". scalar(@tags).".files_id\n";
866 sub tags_subselect_and
868 my($self,@constraints)=@_;
869 my ($tags, $tags_vals, $parent)=$self->constraints_tag_list(@constraints);
871 my @tags_vals=@$tags_vals;;
879 $sql="\tSELECT fxt" . scalar(@tags) . ".files_id FROM files_x_tags fxt1\n";
883 $sql .= ("\tINNER JOIN files_x_tags fxt$cnt ON fxt" .
884 ($cnt-1) . ".files_id=fxt${cnt}.files_id\n");
886 push(@andclauses, "\t\tfxt${cnt}.tags_id = $tag");
887 print "AND: @andclauses\n";
892 $sql .= "\tWHERE\n\t\t";
893 $sql .= join(" AND\n\t\t", @andclauses) . "\n";
895 $sql .= "\tGROUP BY fxt". scalar(@tags).".files_id\n";
899 sub tags_subselect_or
901 my($self,@constraints)=@_;
902 my ($tags, $tags_vals, $parent)=$self->constraints_tag_list(@constraints);
904 my @tags_vals=@$tags_vals;;
906 my $sql=("\tSELECT files_x_tags.files_id FROM tags t1\n" .
907 "\tINNER JOIN files_x_tags ON t1.id=files_x_tags.tags_id\n");
913 push(@andclauses, "( t1.parents_id=" . (defined($parent) ? $parent : "''") . " )");
914 push(@andclauses, "( t1.id IN ( " . join(', ', @tags) ." ) )");
916 for my $pair (@tags_vals)
918 my($tag, $val)=@$pair;
919 push(@orclauses, "( t1.parents_id=$tag AND t1.id=$val )");
921 # push(@andclauses, "( t1.parents_id=" . (defined($parent) ? $parent : "''") . " )");
924 push(@andclauses, join("\n\t\tOR ", @orclauses));
928 $sql .= "\tWHERE\n\t\t";
929 $sql .= join("\n\t\tAND ", @andclauses) . "\n";
931 $sql .= "\tGROUP BY files_x_tags.files_id\n";
935 sub constraints_tag_list
937 my($self, @constraints)=@_;
941 for my $constraint (@constraints)
943 # print ref($constraint), ": ", $constraint->{name}, "\n";
944 if(ref($constraint) eq "ID3FS::PathElement::Tag")
946 if(defined($lasttag))
949 push(@tags_vals, [$lasttag, $constraint->{id}]) if defined($constraint->{id});
952 elsif($self->tag_has_values($constraint->{id}))
954 # print "HASVALUES\n";
955 $lasttag=$constraint->{id} if defined($constraint->{id});
959 # print "NOVALUES\n";
960 push(@tags, $constraint->{id}) if(defined($constraint->{id}));
964 unless($self->{db}->{postgres})
966 @tags=map{ "\"$_\""; } @tags;
967 @tags_vals=map( { [ map({ "\"$_\""; } @$_ ) ] } @tags_vals);
968 $lasttag="\"$lasttag\"" if defined($lasttag);
970 return(\@tags, \@tags_vals, $lasttag);
977 my $sql=("SELECT tags.name FROM tags\n" .
978 "WHERE tags.parents_id=''\n" .
979 "GROUP BY tags.name\n");
980 my @names=$self->{db}->cmd_firstcol($sql);
986 # FIXME: only shows one level of tag depth
988 my $sql=("SELECT p.name, t.name FROM tags t\n" .
989 "INNER JOIN tags p ON t.parents_id=p.id\n" .
990 "GROUP BY p.name, t.name\n");
992 my $result=$self->{db}->cmd_rows($sql);
994 for my $pair (@$result)
996 push(@{$tags->{$pair->[0]}}, $pair->[1]);