import of rt 3.0.9RT_3_0_9

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+UPGRADING
+
+
+*******
+WARNING
+*******
+
+
+Before making any changes to your database, always ensure that you have a 
+complete current backup. If you don't have a current backup, you could 
+accidentally damage your database and lose data or worse.
+
+
+
+Look for the 
+
+
+----------------------------------------------------------------------
+
+3.0.7
+=====
+
+All Databases
+-------------
+
+If you are upgrading from versions between 3.0.0 and 3.0.7, inclusive,
+you might find improved performance by adding the following index to
+your database:
+
+CREATE INDEX Links4 ON Links(Type,LocalBase);
+
+
+
+3.0.6
+=====
+
+
+All Databases
+-------------
+
+If you are upgrading from versions between 3.0.0 and 3.0.6, inclusive,
+you might find improved performance by adding the following indices to
+your database:
+
+   CREATE INDEX TicketCustomFieldValues1 ON TicketCustomFieldValues (CustomField,Ticket,Content); 
+   CREATE INDEX TicketCustomFieldValues2 ON TicketCustomFieldValues (CustomField,Ticket); 
+
+   CREATE INDEX CustomFieldValues1 ON CustomFieldValues (CustomField);
+
+
+
+Postgres
+--------
+
+If you have a Postgres database, the following changes to your
+database can improve performance:
+
+  ALTER TABLE groups rename instance to instance1;
+  ALTER TABLE groups add instance int;
+  UPDATE groups SET instance = instance1::text::int where btrim(instance1) <> '';
+  ALTER TABLE groups drop column instance1;
+
+
+