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cac7658205
This provides a mechanism for specifying conversions between SQL data types and procedural languages. As examples, there are transforms for hstore and ltree for PL/Perl and PL/Python. reviews by Pavel Stěhule and Andres Freund
18 lines
481 B
SQL
18 lines
481 B
SQL
-- make sure the prerequisite libraries are loaded
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DO '' LANGUAGE plperl;
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SELECT NULL::hstore;
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CREATE FUNCTION hstore_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_hstore(val internal) RETURNS hstore
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LANGUAGE C STRICT IMMUTABLE
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AS 'MODULE_PATHNAME';
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CREATE TRANSFORM FOR hstore LANGUAGE plperl (
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FROM SQL WITH FUNCTION hstore_to_plperl(internal),
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TO SQL WITH FUNCTION plperl_to_hstore(internal)
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);
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