Patch for bug 253357: replace IFNULL with COALESCE for increased database compatibility; patch by Tomas Kopal <Tomas.Kopal@altap.cz>; r=vladd, a=justdave.

webtools/bugzilla/Bugzilla/Bug.pm

@@ -143,7 +143,7 @@ sub initBug  {
       reporter, bug_file_loc, short_desc, target_milestone,
       qa_contact, status_whiteboard,
       DATE_FORMAT(creation_ts,'%Y.%m.%d %H:%i'),
-      delta_ts, ifnull(sum(votes.vote_count),0),
+      delta_ts, COALESCE(SUM(votes.vote_count), 0),
       reporter_accessible, cclist_accessible,
       estimated_time, remaining_time
     from bugs left join votes using(bug_id),

webtools/bugzilla/CGI.pl

@@ -317,7 +317,7 @@ sub GetBugActivity {
     }
     
     my $query = "
-        SELECT IFNULL(fielddefs.description, bugs_activity.fieldid),
+        SELECT COALESCE(fielddefs.description, bugs_activity.fieldid),
                 fielddefs.name,
                 bugs_activity.attach_id,
                 DATE_FORMAT(bugs_activity.bug_when,'%Y.%m.%d %H:%i'),

webtools/bugzilla/long_list.cgi

@@ -42,7 +42,7 @@ my $cgi = Bugzilla->cgi;
 my $generic_query = "
   SELECT 
     bugs.bug_id, 
-    IFNULL(bugs.alias,''), 
+    COALESCE(bugs.alias, ''), 
     products.name, 
     bugs.version, 
     bugs.rep_platform,