m...@byrney.com writes:
> The question is: what's the "best practice" way of letting a
> C/C++-language function hang onto internal state across calls?
A static variable for that is a really horrid idea. Instead use
fcinfo->flinfo->fn_extra to point to some workspace palloc'd in the
appropriate context. If you grep the PG sources for fn_extra you'll
find plenty of examples.
regards, tom lane
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