Oops, forgot to include the query, it's

SELECT b2deliveryorders.idb2deliveryorders, 
a2clientpremises.ida2clientpremises, a2clientpremises.premisesname, 
a2clientpremises.town, b2deliveryorders.expectedby, 
b2deliveryorders.dateordered, b2deliveryorders.invoicenumber, 
b2deliveryorders.deliverymethod, b2deliveryorders.driver, 
dbvcalc_delivery_charges.total, dbvcalc_delivery_charges.boxes, 
b2deliveryorders.createdbyauto
   FROM b2deliveryorders
   LEFT JOIN a2clientpremises ON b2deliveryorders.a2clientpremisespremisesname 
= a2clientpremises.ida2clientpremises
   LEFT JOIN dbvcalc_delivery_charges ON b2deliveryorders.idb2deliveryorders = 
dbvcalc_delivery_charges.idb2deliveryorders
  WHERE b2deliveryorders.complete = false AND b2deliveryorders.invoiced = false
  ORDER BY b2deliveryorders.expectedby NULLS FIRST;

Oliver

Begin forwarded message:

> From: Oliver Kohll - Mailing Lists <oliver.li...@gtwm.co.uk>
> Subject: explain analyse and nested loop joins
> Date: 5 November 2011 19:21:23 GMT
> To: pgsql-general <pgsql-general@postgresql.org>
> 
> Hi,
> 
> I have a query I'm trying to optimise. 

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