database/postgres
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2025-07-27 12:41:57 +03:00
Code Activity

Add transforms feature

Browse Source 
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
This commit is contained in:
Peter Eisentraut
2015-04-26 10:33:14 -04:00
parent f320cbb615
commit cac7658205
101 changed files with 6034 additions and 2811 deletions
Download Patch File Download Diff File Expand all files Collapse all files

74
contrib/hstore_plperl/expected/create_transform.out Normal file
View File

@ -0,0 +1,74 @@
-- general regression test for transforms
DROP EXTENSION IF EXISTS hstore CASCADE;
NOTICE: extension "hstore" does not exist, skipping
DROP EXTENSION IF EXISTS plperl CASCADE;
NOTICE: extension "plperl" does not exist, skipping
DROP EXTENSION IF EXISTS hstore_plperl CASCADE;
NOTICE: extension "hstore_plperl" does not exist, skipping
CREATE EXTENSION hstore;
CREATE EXTENSION plperl;
CREATE FUNCTION hstore_to_plperl(val internal) RETURNS internal
LANGUAGE C STRICT IMMUTABLE
AS '$libdir/hstore_plperl';
CREATE FUNCTION plperl_to_hstore(val internal) RETURNS hstore
LANGUAGE C STRICT IMMUTABLE
AS '$libdir/hstore_plperl';
CREATE TRANSFORM FOR foo LANGUAGE plperl (FROM SQL WITH FUNCTION hstore_to_plperl(internal), TO SQL WITH FUNCTION plperl_to_hstore(internal)); -- fail
ERROR: type "foo" does not exist
CREATE TRANSFORM FOR hstore LANGUAGE foo (FROM SQL WITH FUNCTION hstore_to_plperl(internal), TO SQL WITH FUNCTION plperl_to_hstore(internal)); -- fail
ERROR: language "foo" does not exist
CREATE TRANSFORM FOR hstore LANGUAGE plperl (FROM SQL WITH FUNCTION hstore_out(hstore), TO SQL WITH FUNCTION plperl_to_hstore(internal)); -- fail
ERROR: return data type of FROM SQL function must be "internal"
CREATE TRANSFORM FOR hstore LANGUAGE plperl (FROM SQL WITH FUNCTION internal_in(cstring), TO SQL WITH FUNCTION plperl_to_hstore(internal)); -- fail
ERROR: first argument of transform function must be type "internal"
CREATE TRANSFORM FOR hstore LANGUAGE plperl (FROM SQL WITH FUNCTION hstore_to_plperl(internal), TO SQL WITH FUNCTION plperl_to_hstore(internal)); -- ok
CREATE TRANSFORM FOR hstore LANGUAGE plperl (FROM SQL WITH FUNCTION hstore_to_plperl(internal), TO SQL WITH FUNCTION plperl_to_hstore(internal)); -- fail
ERROR: transform for type hstore language plperl already exists
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
CREATE OR REPLACE TRANSFORM FOR hstore LANGUAGE plperl (FROM SQL WITH FUNCTION hstore_to_plperl(internal)); -- ok
CREATE OR REPLACE TRANSFORM FOR hstore LANGUAGE plperl (TO SQL WITH FUNCTION plperl_to_hstore(internal)); -- ok
DROP TRANSFORM IF EXISTS FOR fake_type LANGUAGE plperl;
NOTICE: type "fake_type" does not exist, skipping
DROP TRANSFORM IF EXISTS FOR hstore LANGUAGE fake_lang;
NOTICE: transform for type hstore language fake_lang does not exist, skipping
DROP TRANSFORM FOR foo LANGUAGE plperl;
ERROR: type "foo" does not exist
DROP TRANSFORM FOR hstore LANGUAGE foo;
ERROR: language "foo" does not exist
DROP TRANSFORM FOR hstore LANGUAGE plperl;
DROP TRANSFORM IF EXISTS FOR hstore LANGUAGE plperl;
NOTICE: transform for type hstore language plperl does not exist, skipping
DROP FUNCTION hstore_to_plperl(val internal);
DROP FUNCTION plperl_to_hstore(val internal);
CREATE EXTENSION hstore_plperl;
\dx+ hstore_plperl
Objects in extension "hstore_plperl"
Object Description
--------------------------------------
function hstore_to_plperl(internal)
function plperl_to_hstore(internal)
transform for hstore language plperl
(3 rows)
ALTER EXTENSION hstore_plperl DROP TRANSFORM FOR hstore LANGUAGE plperl;
\dx+ hstore_plperl
Objects in extension "hstore_plperl"
Object Description
-------------------------------------
function hstore_to_plperl(internal)
function plperl_to_hstore(internal)
(2 rows)
ALTER EXTENSION hstore_plperl ADD TRANSFORM FOR hstore LANGUAGE plperl;
\dx+ hstore_plperl
Objects in extension "hstore_plperl"
Object Description
--------------------------------------
function hstore_to_plperl(internal)
function plperl_to_hstore(internal)
transform for hstore language plperl
(3 rows)
DROP EXTENSION hstore CASCADE;
NOTICE: drop cascades to extension hstore_plperl
DROP EXTENSION plperl CASCADE;