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-rw-r--r--lib/PublicInbox/Search.pm6
1 files changed, 6 insertions, 0 deletions
diff --git a/lib/PublicInbox/Search.pm b/lib/PublicInbox/Search.pm
index 1c648299..c18e19d4 100644
--- a/lib/PublicInbox/Search.pm
+++ b/lib/PublicInbox/Search.pm
@@ -219,6 +219,12 @@ sub mdocid {
         int(($docid - 1) / $nshard) + 1;
 }
 
+sub mset_to_artnums {
+        my ($self, $mset) = @_;
+        my $nshard = $self->{nshard} // 1;
+        [ map { mdocid($nshard, $_) } $mset->items ];
+}
+
 sub xdb ($) {
         my ($self) = @_;
         $self->{xdb} ||= do {