overidx: preserve `tid' column on re-indexing

[public-inbox.git] / lib / PublicInbox / OverIdx.pm

diff --git a/lib/PublicInbox/OverIdx.pm b/lib/PublicInbox/OverIdx.pm
index 62fec0dafb4056118a320ca3fe5ba42030b1fa33..cc9bd7d483650d138b8f388193345c229b2b977c 100644 (file)
--- a/lib/PublicInbox/OverIdx.pm
+++ b/lib/PublicInbox/OverIdx.pm
@@ -79,8 +79,15 @@ sub mid2id {
 }
 
 sub delete_by_num {
-       my ($self, $num) = @_;
+       my ($self, $num, $tid_ref) = @_;
        my $dbh = $self->{dbh};
+       if ($tid_ref) {
+               my $sth = $dbh->prepare_cached(<<'', undef, 1);
+SELECT tid FROM over WHERE num = ? LIMIT 1
+
+               $sth->execute($num);
+               $$tid_ref = $sth->fetchrow_array; # may be undef
+       }
        foreach (qw(over id2num)) {
                $dbh->prepare_cached(<<"")->execute($num);
 DELETE FROM $_ WHERE num = ?
@@ -262,7 +269,7 @@ sub add_over {
        my $vivified = 0;
 
        $self->begin_lazy;
-       $self->delete_by_num($num);
+       $self->delete_by_num($num, \$old_tid);
        foreach my $mid (@$mids) {
                my $v = 0;
                each_by_mid($self, $mid, ['tid'], sub {