[COMMITTERS] pgsql: Update "Using EXPLAIN" documentation examples using current code

Update "Using EXPLAIN" documentation examples using current code. It seems like a good idea to update these examples since some fairly basic planner behaviors have changed in 9.3; notably that the startup cost for an indexscan plan node is no longer invariably estimated at 0.00. Branch -- REL

[COMMITTERS] pgsql: Update "Using EXPLAIN" documentation examples using current code

Update "Using EXPLAIN" documentation examples using current code. It seems like a good idea to update these examples since some fairly basic planner behaviors have changed in 9.3; notably that the startup cost for an indexscan plan node is no longer invariably estimated at 0.00. Branch -- mas