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04aad40186
There is no specific reason for this right now, but keeping support for old Python versions around indefinitely increases the maintenance burden. The oldest supported Python version is now Python 2.4, which is still shipped in RHEL/CentOS 5 by default. In configure, add a check for the required Python version and give a friendly error message for an old version, instead of relying on an obscure build error later on.
103 lines
2.1 KiB
PL/PgSQL
103 lines
2.1 KiB
PL/PgSQL
CREATE EXTENSION hstore_plpython2u CASCADE;
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-- test hstore -> python
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CREATE FUNCTION test1(val hstore) RETURNS int
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LANGUAGE plpythonu
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TRANSFORM FOR TYPE hstore
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AS $$
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assert isinstance(val, dict)
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plpy.info(sorted(val.items()))
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return len(val)
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$$;
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SELECT test1('aa=>bb, cc=>NULL'::hstore);
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-- the same with the versioned language name
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CREATE FUNCTION test1n(val hstore) RETURNS int
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LANGUAGE plpython2u
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TRANSFORM FOR TYPE hstore
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AS $$
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assert isinstance(val, dict)
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plpy.info(sorted(val.items()))
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return len(val)
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$$;
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SELECT test1n('aa=>bb, cc=>NULL'::hstore);
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-- test hstore[] -> python
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CREATE FUNCTION test1arr(val hstore[]) RETURNS int
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LANGUAGE plpythonu
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TRANSFORM FOR TYPE hstore
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AS $$
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assert(val == [{'aa': 'bb', 'cc': None}, {'dd': 'ee'}])
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return len(val)
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$$;
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SELECT test1arr(array['aa=>bb, cc=>NULL'::hstore, 'dd=>ee']);
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-- test python -> hstore
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CREATE FUNCTION test2() RETURNS hstore
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LANGUAGE plpythonu
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TRANSFORM FOR TYPE hstore
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AS $$
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val = {'a': 1, 'b': 'boo', 'c': None}
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return val
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$$;
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SELECT test2();
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-- test python -> hstore[]
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CREATE FUNCTION test2arr() RETURNS hstore[]
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LANGUAGE plpythonu
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TRANSFORM FOR TYPE hstore
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AS $$
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val = [{'a': 1, 'b': 'boo', 'c': None}, {'d': 2}]
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return val
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$$;
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SELECT test2arr();
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-- test as part of prepare/execute
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CREATE FUNCTION test3() RETURNS void
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LANGUAGE plpythonu
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TRANSFORM FOR TYPE hstore
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AS $$
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rv = plpy.execute("SELECT 'aa=>bb, cc=>NULL'::hstore AS col1")
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assert(rv[0]["col1"] == {'aa': 'bb', 'cc': None})
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val = {'a': 1, 'b': 'boo', 'c': None}
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plan = plpy.prepare("SELECT $1::text AS col1", ["hstore"])
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rv = plpy.execute(plan, [val])
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assert(rv[0]["col1"] == '"a"=>"1", "b"=>"boo", "c"=>NULL')
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$$;
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SELECT test3();
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-- test trigger
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CREATE TABLE test1 (a int, b hstore);
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INSERT INTO test1 VALUES (1, 'aa=>bb, cc=>NULL');
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SELECT * FROM test1;
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CREATE FUNCTION test4() RETURNS trigger
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LANGUAGE plpythonu
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TRANSFORM FOR TYPE hstore
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AS $$
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assert(TD["new"] == {'a': 1, 'b': {'aa': 'bb', 'cc': None}})
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if TD["new"]["a"] == 1:
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TD["new"]["b"] = {'a': 1, 'b': 'boo', 'c': None}
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return "MODIFY"
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$$;
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CREATE TRIGGER test4 BEFORE UPDATE ON test1 FOR EACH ROW EXECUTE PROCEDURE test4();
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UPDATE test1 SET a = a;
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SELECT * FROM test1;
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