Nothing special about it other than "tmp_tblJoin" is defined as a
temporary table.
I do understand what is happening (I think). There is a stale pointer to
the previous instance of the temp table (that no longer exists) which is
causing the function to blow up. My question is how to I stop it from
storing the OID of the old reference.
You don't - it caches plans for queries at compile-time (which is the first time the function is run). You have to refer to temporary tables using EXECUTE. Always. Alternatively, you could use a language that doesn't cache query-plans, e.g. pltcl.
I am relatively new to PG, but have years of experience with MSSQL and never had to deal with these type of issues. I am using plpqsql and explicitly setting it to volatile.
Volatile? What setting is that?
-- Richard Huxton Archonet Ltd
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