1 # Copyright (C) 2018 all contributors <meta@public-inbox.org>
2 # License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
4 # for XOVER, OVER in NNTP, and feeds/homepage/threads in PSGI
5 # Unlike Msgmap, this is an _UNSTABLE_ database which can be
6 # tweaked/updated over time and rebuilt.
7 package PublicInbox::Over;
12 use PublicInbox::SearchMsg;
13 use Compress::Zlib qw(uncompress);
17 my $ro = ref($self) eq 'PublicInbox::Over';
18 my $dbh = DBI->connect("dbi:SQLite:dbname=$self->{filename}",'','', {
23 sqlite_use_immediate_transaction => 1,
25 $dbh->{sqlite_unicode} = 1;
31 bless { filename => $f }, $class;
34 sub disconnect { $_[0]->{dbh} = undef }
36 sub connect { $_[0]->{dbh} ||= $_[0]->dbh_new }
40 bless $smsg, 'PublicInbox::SearchMsg';
41 if (defined(my $data = delete $smsg->{ddd})) {
42 $data = uncompress($data);
44 $smsg->load_from_data($data);
50 my ($self, $sql, $opts, @args) = @_;
51 my $dbh = $self->connect;
52 my $lim = (($opts->{limit} || 0) + 0) || 1000;
53 my $off = (($opts->{offset} || 0) + 0) || 0;
54 $sql .= "LIMIT $lim OFFSET $off";
55 my $msgs = $dbh->selectall_arrayref($sql, { Slice => {} }, @args);
56 load_from_row($_) for @$msgs;
61 my ($self, $beg, $end, $off) = @_;
62 do_get($self, <<'', { offset => $off }, $beg, $end);
63 SELECT * FROM over WHERE num >= ? AND num <= ?
69 my ($self, $ts, $opts) = @_;
70 do_get($self, <<'', $opts, $ts);
71 SELECT * FROM over WHERE num > 0 AND ts >= ?
76 sub nothing () { wantarray ? (0, []) : [] };
79 my ($self, $mid, $opts) = @_;
80 my $dbh = $self->connect;
82 my $id = $dbh->selectrow_array(<<'', undef, $mid);
83 SELECT id FROM msgid WHERE mid = ? LIMIT 1
85 defined $id or return nothing;
87 my $num = $dbh->selectrow_array(<<'', undef, $id);
88 SELECT num FROM id2num WHERE id = ? AND num > 0
89 ORDER BY num ASC LIMIT 1
91 defined $num or return nothing;
93 my ($tid, $sid) = $dbh->selectrow_array(<<'', undef, $num);
94 SELECT tid,sid FROM over WHERE num = ? LIMIT 1
96 defined $tid or return nothing; # $sid may be undef
98 my $cond = 'FROM over WHERE (tid = ? OR sid = ?) AND num > 0';
99 my $msgs = do_get($self, <<"", $opts, $tid, $sid);
100 SELECT * $cond ORDER BY ts ASC
102 return $msgs unless wantarray;
104 my $nr = $dbh->selectrow_array(<<"", undef, $tid, $sid);
105 SELECT COUNT(num) $cond
111 my ($self, $opts) = @_;
112 my $msgs = do_get($self, <<'', $opts);
113 SELECT * FROM over WHERE num > 0
116 return $msgs unless wantarray;
118 my $nr = $self->{dbh}->selectrow_array(<<'');
119 SELECT COUNT(num) FROM over WHERE num > 0
125 my ($self, $num) = @_;
126 my $dbh = $self->connect;
127 my $smsg = $dbh->selectrow_hashref(<<'', undef, $num);
128 SELECT * from OVER where num = ? LIMIT 1
130 return load_from_row($smsg) if $smsg;