How to see detailed plan of a funciton

I have a pgsql function that returns a set of records and I'm trying to
optimize it.

Needless to say it goes thru several selects and appends to the final
result.  I was wondering how I can see the query plan without having to
write things out piece meal.

Explain doesn't help too much since it doesn't get into the guts of the
selects that the function is doing.

For example my function call looks something like

select * from fnget_near_parcels('17', 'KERR PLACE', '02119')

And if I do an explain on this, I simply get

Function Scan on fnget_near_parcels  (cost=0.00..12.50 rows=1000 width=287)

Thanks,
Regina


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