postgresql returns the full timestamp including the time which screws up some procs which assume that the date returned is formatted as YYYY-MM-DD. a simple to_char statement fixes the problem
fixed sort key calculation. postgres driver encloses bind variables in ' ' which makes the sort key calculation fail. the key calculation is done in tcl now.
fixed sort key calculations. the postgres driver puts ' ' around the bind variable. the old code performed calculations like "and sort_key = (:prev_sort_key + :next_sort_key)/2", which caused postgres to barf. this calculation is now done in tcl.
