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plperl's default handling of bool arguments or results is not terribly
satisfactory, since Perl doesn't consider the string 'f' to be false.
Ideally we'd just fix that, but the backwards-compatibility hazard
would be substantial. Instead, build a TRANSFORM module that can
be optionally applied to provide saner semantics.
Perhaps usefully, this is also about the minimum possible skeletal
example of a plperl transform module; so it might be a better starting
point for user-written transform modules than hstore_plperl or
jsonb_plperl.
Ivan Panchenko
Discussion: https://postgr.es/m/1583013317.881182688@f390.i.mail.ru
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