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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
20 lines
647 B
SQL
20 lines
647 B
SQL
/* contrib/bool_plperl/bool_plperl--1.0.sql */
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-- complain if script is sourced in psql, rather than via CREATE EXTENSION
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\echo Use "CREATE EXTENSION bool_plperl" to load this file. \quit
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CREATE FUNCTION bool_to_plperl(val internal) RETURNS internal
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LANGUAGE C STRICT IMMUTABLE
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AS 'MODULE_PATHNAME';
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CREATE FUNCTION plperl_to_bool(val internal) RETURNS bool
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LANGUAGE C STRICT IMMUTABLE
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AS 'MODULE_PATHNAME';
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CREATE TRANSFORM FOR bool LANGUAGE plperl (
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FROM SQL WITH FUNCTION bool_to_plperl(internal),
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TO SQL WITH FUNCTION plperl_to_bool(internal)
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);
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COMMENT ON TRANSFORM FOR bool LANGUAGE plperl IS 'transform between bool and Perl';
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