added: Database index on userSession.expires field to speed up workflows

docs/changelog/7.x.x.txt

@@ -30,6 +30,7 @@
  - fix: Users now have permission to add comments
  - fix: Username for comment poster is now shown correctly
  - fix: Slideshow now works
+ - added: Database index on userSession.expires field to speed up workflows
 
 7.5.7
  - fixed: HttpProxy mixes original site's content encoding with WebGUI's

docs/upgrades/upgrade_7.5.7-7.5.8.pl

@@ -26,6 +26,8 @@ my $session = start(); # this line required
 removeOldGalleryColumns( $session );
 moveColumnsToGalleryFile( $session );
 moveCommentsToGalleryFile( $session );
+clearRSSCache($session);
+addUserSessionExpiresIndex($session);
 
 finish($session); # this line required
 
@@ -37,6 +39,16 @@ finish($session); # this line required
 #	# and here's our code
 #}
 
+#-------------------------------------------------
+sub addUserSessionExpiresIndex {
+    my $session = shift;
+    print "\tAdding index to userSession expires column..." unless $quiet;
+    $session->db->write(
+        "ALTER TABLE `userSession` ADD INDEX `expires` (`expires`)"
+    );
+    print " Done.\n" unless $quiet;
+}
+
 #-------------------------------------------------
 sub clearRSSCache {
     my $session = shift;