On 4/17/14, 8:24 PM, Tom Lane wrote:
> We could in fact implement #2, I imagine, by destroying and recreating
> the entire language interpreter. So I could imagine implementing a
> "DISCARD INTERPRETERS" kind of command that would zap the current
> interpreter(s) for whichever PL languages happened to feel like
> cooperating with the command.
More generally, any extension could maintain any kind of cross-call
state. plproxy, dblink, pgmemcache come to mind. A general hook into
DISCARD might be doable, but then it's not clear how to categorize this
into DISCARD subcommands.