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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
48 lines
2.4 KiB
SQL
48 lines
2.4 KiB
SQL
-- general regression test for transforms
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DROP EXTENSION IF EXISTS hstore CASCADE;
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DROP EXTENSION IF EXISTS plperl CASCADE;
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DROP EXTENSION IF EXISTS hstore_plperl CASCADE;
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CREATE EXTENSION hstore;
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CREATE EXTENSION plperl;
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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 '$libdir/hstore_plperl';
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CREATE FUNCTION plperl_to_hstore(val internal) RETURNS hstore
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LANGUAGE C STRICT IMMUTABLE
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AS '$libdir/hstore_plperl';
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CREATE TRANSFORM FOR foo LANGUAGE plperl (FROM SQL WITH FUNCTION hstore_to_plperl(internal), TO SQL WITH FUNCTION plperl_to_hstore(internal)); -- fail
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CREATE TRANSFORM FOR hstore LANGUAGE foo (FROM SQL WITH FUNCTION hstore_to_plperl(internal), TO SQL WITH FUNCTION plperl_to_hstore(internal)); -- fail
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CREATE TRANSFORM FOR hstore LANGUAGE plperl (FROM SQL WITH FUNCTION hstore_out(hstore), TO SQL WITH FUNCTION plperl_to_hstore(internal)); -- fail
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CREATE TRANSFORM FOR hstore LANGUAGE plperl (FROM SQL WITH FUNCTION internal_in(cstring), TO SQL WITH FUNCTION plperl_to_hstore(internal)); -- fail
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CREATE TRANSFORM FOR hstore LANGUAGE plperl (FROM SQL WITH FUNCTION hstore_to_plperl(internal), TO SQL WITH FUNCTION plperl_to_hstore(internal)); -- ok
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CREATE TRANSFORM FOR hstore LANGUAGE plperl (FROM SQL WITH FUNCTION hstore_to_plperl(internal), TO SQL WITH FUNCTION plperl_to_hstore(internal)); -- fail
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CREATE OR REPLACE TRANSFORM FOR hstore LANGUAGE plperl (FROM SQL WITH FUNCTION hstore_to_plperl(internal), TO SQL WITH FUNCTION plperl_to_hstore(internal)); -- ok
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CREATE OR REPLACE TRANSFORM FOR hstore LANGUAGE plperl (FROM SQL WITH FUNCTION hstore_to_plperl(internal)); -- ok
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CREATE OR REPLACE TRANSFORM FOR hstore LANGUAGE plperl (TO SQL WITH FUNCTION plperl_to_hstore(internal)); -- ok
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DROP TRANSFORM IF EXISTS FOR fake_type LANGUAGE plperl;
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DROP TRANSFORM IF EXISTS FOR hstore LANGUAGE fake_lang;
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DROP TRANSFORM FOR foo LANGUAGE plperl;
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DROP TRANSFORM FOR hstore LANGUAGE foo;
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DROP TRANSFORM FOR hstore LANGUAGE plperl;
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DROP TRANSFORM IF EXISTS FOR hstore LANGUAGE plperl;
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DROP FUNCTION hstore_to_plperl(val internal);
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DROP FUNCTION plperl_to_hstore(val internal);
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CREATE EXTENSION hstore_plperl;
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\dx+ hstore_plperl
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ALTER EXTENSION hstore_plperl DROP TRANSFORM FOR hstore LANGUAGE plperl;
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\dx+ hstore_plperl
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ALTER EXTENSION hstore_plperl ADD TRANSFORM FOR hstore LANGUAGE plperl;
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\dx+ hstore_plperl
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DROP EXTENSION hstore CASCADE;
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DROP EXTENSION plperl CASCADE;
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