search: free up 'Q' prefix for a real unique identifier

This will allow easier-compatibility with v2 code which will
introduce content_id as the unique identifier.
The old "XMID" becomes "XM" as a free text searchable term.
"Q" becomes "XMID" as a boolean prefix.

There's no user-visible changes in this, but there needs to
be a schema version bump later on...
(more changes planned which can affect v1)

1 files changed, 4 insertions, 4 deletions

diff --git a/lib/PublicInbox/SearchIdx.pm b/lib/PublicInbox/SearchIdx.pm
index 66faed31..0ee07791 100644
--- a/lib/PublicInbox/SearchIdx.pm
+++ b/lib/PublicInbox/SearchIdx.pm
@@ -276,7 +276,7 @@ sub add_message {
                 }
                 $smsg = PublicInbox::SearchMsg->new($mime);
                 my $doc = $smsg->{doc};
-                $doc->add_term('Q' . $mid);
+                $doc->add_term('XMID' . $mid);
 
                 my $subj = $smsg->subject;
                 if ($subj ne '') {
@@ -334,7 +334,7 @@ sub add_message {
                 });
 
                 link_message($self, $smsg, $old_tid);
-                $tg->index_text($mid, 1, 'XMID');
+                $tg->index_text($mid, 1, 'XM');
                 $doc->set_data($smsg->to_doc_data($blob));
 
                 if (my $altid = $self->{-altid}) {
@@ -366,7 +366,7 @@ sub remove_message {
         $mid = mid_clean($mid);
 
         eval {
-                $doc_id = $self->find_unique_doc_id('Q' . $mid);
+                $doc_id = $self->find_unique_doc_id('XMID' . $mid);
                 if (defined $doc_id) {
                         $db->delete_document($doc_id);
                 } else {
@@ -683,7 +683,7 @@ sub create_ghost {
 
         my $tid = $self->next_thread_id;
         my $doc = Search::Xapian::Document->new;
-        $doc->add_term('Q' . $mid);
+        $doc->add_term('XMID' . $mid);
         $doc->add_term('G' . $tid);
         $doc->add_term('T' . 'ghost');