Having developed a complex query, I want to wrap it up as a function
so that it can take a parameter and return a set of rows. This query
is currently written as multiple sql statements that create a few
interstitial temp tables that are then joined. If I put this into a
function definition, do those temp tables get dropped automatically
when the function returns?
My alternative is to re-write the query as a self joins and
subqueries. I can do that, but it's somewhat less readable.
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TIP 9: In versions below 8.0, the planner will ignore your desire to
choose an index scan if your joining column's datatypes do not
match
