X-Git-Url: http://www.git.stargrave.org/?a=blobdiff_plain;f=lib%2FPublicInbox%2FOver.pm;h=a7fd1315c3af88269b02bf2c6289be86c1541700;hb=f91753f00b760c0e06eb0384792e5b18bd99bb0f;hp=c74072a26c063ea3c8acaebf1b06f9da34ba03a8;hpb=87dca6d8d5988c5eb54019cca342450b0b7dd6b7;p=public-inbox.git

diff --git a/lib/PublicInbox/Over.pm b/lib/PublicInbox/Over.pm
index c74072a2..a7fd1315 100644
--- a/lib/PublicInbox/Over.pm
+++ b/lib/PublicInbox/Over.pm
@@ -51,42 +51,54 @@ sub do_get {
 	my $dbh = $self->connect;
 	my $lim = (($opts->{limit} || 0) + 0) || 1000;
 	my $off = (($opts->{offset} || 0) + 0) || 0;
-	$sql .= "LIMIT $lim OFFSET $off";
+	$sql .= "LIMIT $lim";
+	$sql .= " OFFSET $off" if $off > 0;
 	my $msgs = $dbh->selectall_arrayref($sql, { Slice => {} }, @args);
 	load_from_row($_) for @$msgs;
 	$msgs
 }
 
 sub query_xover {
-	my ($self, $beg, $end, $off) = @_;
-	do_get($self, <<'', { offset => $off }, $beg, $end);
+	my ($self, $beg, $end) = @_;
+	do_get($self, <<'', {}, $beg, $end);
 SELECT * FROM over WHERE num >= ? AND num <= ?
 ORDER BY num ASC
 
 }
 
 sub query_ts {
-	my ($self, $ts, $opts) = @_;
-	do_get($self, <<'', $opts, $ts);
-SELECT * FROM over WHERE num > 0 AND ts >= ?
-ORDER BY ts ASC
+	my ($self, $ts, $prev) = @_;
+	do_get($self, <<'', {}, $ts, $prev);
+SELECT num,ddd FROM over WHERE ts >= ? AND num > ?
+ORDER BY num ASC
 
 }
 
+sub nothing () { wantarray ? (0, []) : [] };
+
 sub get_thread {
 	my ($self, $mid, $opts) = @_;
 	my $dbh = $self->connect;
-	my ($tid, $sid) = $dbh->selectrow_array(<<'', undef, $mid);
-SELECT tid,sid FROM over
-LEFT JOIN id2num ON over.num = id2num.num
-LEFT JOIN msgid ON id2num.id = msgid.id
-WHERE msgid.mid = ? AND over.num > 0
-LIMIT 1
+
+	my $id = $dbh->selectrow_array(<<'', undef, $mid);
+SELECT id FROM msgid WHERE mid = ? LIMIT 1
+
+	defined $id or return nothing;
+
+	my $num = $dbh->selectrow_array(<<'', undef, $id);
+SELECT num FROM id2num WHERE id = ? AND num > 0
+ORDER BY num ASC LIMIT 1
+
+	defined $num or return nothing;
+
+	my ($tid, $sid) = $dbh->selectrow_array(<<'', undef, $num);
+SELECT tid,sid FROM over WHERE num = ? LIMIT 1
+
+	defined $tid or return nothing; # $sid may be undef
 
 	my $cond = 'FROM over WHERE (tid = ? OR sid = ?) AND num > 0';
 	my $msgs = do_get($self, <<"", $opts, $tid, $sid);
-SELECT * $cond
-ORDER BY ts ASC
+SELECT * $cond ORDER BY ts ASC
 
 	return $msgs unless wantarray;