- Add index on contactgroupmembers.contact_id column.

Improves performance and fixes problem with contactgroupmembers table creation on MySQL 4.x

SQL/sqlite.initial.sql

@@ -56,6 +56,8 @@ CREATE TABLE contactgroupmembers (
   PRIMARY KEY (contactgroup_id, contact_id)
 );
 
+CREATE INDEX ix_contactgroupmembers_contact_id ON contactgroupmembers (contact_id);
+
 
 -- --------------------------------------------------------