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-rw-r--r--lib/PublicInbox/Search.pm1
-rw-r--r--lib/PublicInbox/SearchIdx.pm1
2 files changed, 2 insertions, 0 deletions
diff --git a/lib/PublicInbox/Search.pm b/lib/PublicInbox/Search.pm
index f2d3b92d..c54cf7b9 100644
--- a/lib/PublicInbox/Search.pm
+++ b/lib/PublicInbox/Search.pm
@@ -12,6 +12,7 @@ use constant {
         YYYYMMDD => 1, # Date: header for searching in the WWW UI
         DT => 2, # Date: YYYYMMDDHHMMSS
         BYTES => 3, # IMAP RFC822.SIZE
+        UID => 4, # IMAP UID == NNTP article number == Xapian docid
         # TODO
         # REPLYCNT => 4, # IMAP ANSWERED
 };
diff --git a/lib/PublicInbox/SearchIdx.pm b/lib/PublicInbox/SearchIdx.pm
index f7462aa7..3df7970e 100644
--- a/lib/PublicInbox/SearchIdx.pm
+++ b/lib/PublicInbox/SearchIdx.pm
@@ -342,6 +342,7 @@ sub add_xapian ($$$$) {
         my $dt = strftime('%Y%m%d%H%M%S', @ds);
         add_val($doc, PublicInbox::Search::DT(), $dt);
         add_val($doc, PublicInbox::Search::BYTES(), $smsg->{bytes});
+        add_val($doc, PublicInbox::Search::UID(), $smsg->{num});
 
         my $tg = term_generator($self);
         $tg->set_document($doc);