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-rw-r--r--lib/PublicInbox/Search.pm1
-rw-r--r--lib/PublicInbox/SearchIdx.pm1
-rw-r--r--t/search.t5
3 files changed, 7 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);
diff --git a/t/search.t b/t/search.t
index cf325416..d4ca28c7 100644
--- a/t/search.t
+++ b/t/search.t
@@ -324,6 +324,11 @@ $ibx->with_umask(sub {
                 like($bytes, qr/\A[0-9]+\z/, '$bytes stored as digit');
                 ok($bytes > 0, '$bytes is > 0');
                 is($bytes, $smsg->{bytes}, 'bytes Xapian value matches Over');
+
+                $col = PublicInbox::Search::UID();
+                my $uid = PublicInbox::Smsg::get_val($doc, $col);
+                is($uid, $smsg->{num}, 'UID column matches {num}');
+                is($uid, $m->get_docid, 'UID column matches docid');
         }
 
         $mset = $ro->query('tc:list@example.com', {mset => 1});