Sorting index fix for role lookups: adds...

Sorting index fix for role lookups: adds profile_role_role_created_profile_id_idx index on profile_role

db/096to097.sql

@@ -18,3 +18,6 @@ alter table reply add index reply_profile_id_modified_notice_id_idx (profile_id,
 
 -- Needed for sorting group messages by timestamp
 alter table group_inbox add index group_inbox_group_id_created_notice_id_idx (group_id, created, notice_id);
+
+-- Helps make some reverse role lookups more efficient if there's a lot of assigned accounts
+alter table profile_role add index profile_role_role_created_profile_id_idx (role, created, profile_id);

db/statusnet.sql

@@ -627,7 +627,8 @@ create table profile_role (
     role    varchar(32) not null comment 'string representing the role',
     created datetime not null comment 'date the role was granted',
 
-    constraint primary key (profile_id, role)
+    constraint primary key (profile_id, role),
+    index profile_role_role_created_profile_id_idx (role, created, profile_id)
 
 ) ENGINE=InnoDB CHARACTER SET utf8 COLLATE utf8_bin;