Zdenek Kotala <[EMAIL PROTECTED]> writes:
> Tom Lane wrote:
>> This is not a race condition because the backend is single-threaded.

> I see. Each backend has own function cache and use_count is for handle 
> recursion usage. Are my assumption correct?

Right.  Once a function cache entry is set up, it exists unchanged until
no longer in use, no matter what happens to the underlying pg_proc row.

                        regards, tom lane

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