Adding upstream version 13.4.upstream/13.4upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

11 files changed, 585 insertions, 0 deletions

diff --git a/contrib/hstore_plpython/.gitignore b/contrib/hstore_plpython/.gitignore
new file mode 100644
index 0000000..ce6fab9
--- /dev/null
+++ b/contrib/hstore_plpython/.gitignore
@@ -0,0 +1,6 @@
+# Generated subdirectories
+/expected/python3/
+/log/
+/results/
+/sql/python3/
+/tmp_check/
diff --git a/contrib/hstore_plpython/Makefile b/contrib/hstore_plpython/Makefile
new file mode 100644
index 0000000..6af097a
--- /dev/null
+++ b/contrib/hstore_plpython/Makefile
@@ -0,0 +1,45 @@
+# contrib/hstore_plpython/Makefile
+
+MODULE_big = hstore_plpython$(python_majorversion)
+OBJS = \
+	$(WIN32RES) \
+	hstore_plpython.o
+PGFILEDESC = "hstore_plpython - hstore transform for plpython"
+
+EXTENSION = hstore_plpythonu hstore_plpython2u hstore_plpython3u
+DATA = hstore_plpythonu--1.0.sql hstore_plpython2u--1.0.sql hstore_plpython3u--1.0.sql
+
+REGRESS = hstore_plpython
+REGRESS_PLPYTHON3_MANGLE := $(REGRESS)
+
+PG_CPPFLAGS = $(python_includespec) -DPLPYTHON_LIBNAME='"plpython$(python_majorversion)"'
+
+ifdef USE_PGXS
+PG_CPPFLAGS += -I$(includedir_server)/extension
+PG_CONFIG = pg_config
+PGXS := $(shell $(PG_CONFIG) --pgxs)
+include $(PGXS)
+else
+PG_CPPFLAGS += -I$(top_srcdir)/src/pl/plpython -I$(top_srcdir)/contrib
+subdir = contrib/hstore_plpython
+top_builddir = ../..
+include $(top_builddir)/src/Makefile.global
+include $(top_srcdir)/contrib/contrib-global.mk
+endif
+
+# We must link libpython explicitly
+ifeq ($(PORTNAME), win32)
+# ... see silliness in plpython Makefile ...
+SHLIB_LINK_INTERNAL += $(sort $(wildcard ../../src/pl/plpython/libpython*.a))
+else
+rpathdir = $(python_libdir)
+SHLIB_LINK += $(python_libspec) $(python_additional_libs)
+endif
+
+REGRESS_OPTS += --load-extension=hstore
+ifeq ($(python_majorversion),2)
+REGRESS_OPTS += --load-extension=plpythonu --load-extension=hstore_plpythonu
+endif
+EXTRA_INSTALL += contrib/hstore
+
+include $(top_srcdir)/src/pl/plpython/regress-python3-mangle.mk
diff --git a/contrib/hstore_plpython/expected/hstore_plpython.out b/contrib/hstore_plpython/expected/hstore_plpython.out
new file mode 100644
index 0000000..ecf1dd6
--- /dev/null
+++ b/contrib/hstore_plpython/expected/hstore_plpython.out
@@ -0,0 +1,150 @@
+CREATE EXTENSION hstore_plpython2u CASCADE;
+NOTICE:  installing required extension "plpython2u"
+-- test hstore -> python
+CREATE FUNCTION test1(val hstore) RETURNS int
+LANGUAGE plpythonu
+TRANSFORM FOR TYPE hstore
+AS $$
+assert isinstance(val, dict)
+plpy.info(sorted(val.items()))
+return len(val)
+$$;
+SELECT test1('aa=>bb, cc=>NULL'::hstore);
+INFO:  [('aa', 'bb'), ('cc', None)]
+ test1 
+-------
+     2
+(1 row)
+
+-- the same with the versioned language name
+CREATE FUNCTION test1n(val hstore) RETURNS int
+LANGUAGE plpython2u
+TRANSFORM FOR TYPE hstore
+AS $$
+assert isinstance(val, dict)
+plpy.info(sorted(val.items()))
+return len(val)
+$$;
+SELECT test1n('aa=>bb, cc=>NULL'::hstore);
+INFO:  [('aa', 'bb'), ('cc', None)]
+ test1n 
+--------
+      2
+(1 row)
+
+-- test hstore[] -> python
+CREATE FUNCTION test1arr(val hstore[]) RETURNS int
+LANGUAGE plpythonu
+TRANSFORM FOR TYPE hstore
+AS $$
+assert(val == [{'aa': 'bb', 'cc': None}, {'dd': 'ee'}])
+return len(val)
+$$;
+SELECT test1arr(array['aa=>bb, cc=>NULL'::hstore, 'dd=>ee']);
+ test1arr 
+----------
+        2
+(1 row)
+
+-- test python -> hstore
+CREATE FUNCTION test2(a int, b text) RETURNS hstore
+LANGUAGE plpythonu
+TRANSFORM FOR TYPE hstore
+AS $$
+val = {'a': a, 'b': b, 'c': None}
+return val
+$$;
+SELECT test2(1, 'boo');
+              test2              
+---------------------------------
+ "a"=>"1", "b"=>"boo", "c"=>NULL
+(1 row)
+
+--- test ruleutils
+\sf test2
+CREATE OR REPLACE FUNCTION public.test2(a integer, b text)
+ RETURNS hstore
+ TRANSFORM FOR TYPE hstore
+ LANGUAGE plpythonu
+AS $function$
+val = {'a': a, 'b': b, 'c': None}
+return val
+$function$
+-- test python -> hstore[]
+CREATE FUNCTION test2arr() RETURNS hstore[]
+LANGUAGE plpythonu
+TRANSFORM FOR TYPE hstore
+AS $$
+val = [{'a': 1, 'b': 'boo', 'c': None}, {'d': 2}]
+return val
+$$;
+SELECT test2arr();
+                           test2arr                           
+--------------------------------------------------------------
+ {"\"a\"=>\"1\", \"b\"=>\"boo\", \"c\"=>NULL","\"d\"=>\"2\""}
+(1 row)
+
+-- test python -> domain over hstore
+CREATE DOMAIN hstore_foo AS hstore CHECK(VALUE ? 'foo');
+CREATE FUNCTION test2dom(fn text) RETURNS hstore_foo
+LANGUAGE plpythonu
+TRANSFORM FOR TYPE hstore
+AS $$
+return {'a': 1, fn: 'boo', 'c': None}
+$$;
+SELECT test2dom('foo');
+             test2dom              
+-----------------------------------
+ "a"=>"1", "c"=>NULL, "foo"=>"boo"
+(1 row)
+
+SELECT test2dom('bar');  -- fail
+ERROR:  value for domain hstore_foo violates check constraint "hstore_foo_check"
+CONTEXT:  while creating return value
+PL/Python function "test2dom"
+-- test as part of prepare/execute
+CREATE FUNCTION test3() RETURNS void
+LANGUAGE plpythonu
+TRANSFORM FOR TYPE hstore
+AS $$
+rv = plpy.execute("SELECT 'aa=>bb, cc=>NULL'::hstore AS col1")
+assert(rv[0]["col1"] == {'aa': 'bb', 'cc': None})
+
+val = {'a': 1, 'b': 'boo', 'c': None}
+plan = plpy.prepare("SELECT $1::text AS col1", ["hstore"])
+rv = plpy.execute(plan, [val])
+assert(rv[0]["col1"] == '"a"=>"1", "b"=>"boo", "c"=>NULL')
+$$;
+SELECT test3();
+ test3 
+-------
+ 
+(1 row)
+
+-- test trigger
+CREATE TABLE test1 (a int, b hstore);
+INSERT INTO test1 VALUES (1, 'aa=>bb, cc=>NULL');
+SELECT * FROM test1;
+ a |           b            
+---+------------------------
+ 1 | "aa"=>"bb", "cc"=>NULL
+(1 row)
+
+CREATE FUNCTION test4() RETURNS trigger
+LANGUAGE plpythonu
+TRANSFORM FOR TYPE hstore
+AS $$
+assert(TD["new"] == {'a': 1, 'b': {'aa': 'bb', 'cc': None}})
+if TD["new"]["a"] == 1:
+    TD["new"]["b"] = {'a': 1, 'b': 'boo', 'c': None}
+
+return "MODIFY"
+$$;
+CREATE TRIGGER test4 BEFORE UPDATE ON test1 FOR EACH ROW EXECUTE PROCEDURE test4();
+UPDATE test1 SET a = a;
+SELECT * FROM test1;
+ a |                b                
+---+---------------------------------
+ 1 | "a"=>"1", "b"=>"boo", "c"=>NULL
+(1 row)
+
diff --git a/contrib/hstore_plpython/hstore_plpython.c b/contrib/hstore_plpython/hstore_plpython.c
new file mode 100644
index 0000000..39bad55
--- /dev/null
+++ b/contrib/hstore_plpython/hstore_plpython.c
@@ -0,0 +1,190 @@
+#include "postgres.h"
+
+#include "fmgr.h"
+#include "hstore/hstore.h"
+#include "plpy_typeio.h"
+#include "plpython.h"
+
+PG_MODULE_MAGIC;
+
+extern void _PG_init(void);
+
+/* Linkage to functions in plpython module */
+typedef char *(*PLyObject_AsString_t) (PyObject *plrv);
+static PLyObject_AsString_t PLyObject_AsString_p;
+#if PY_MAJOR_VERSION >= 3
+typedef PyObject *(*PLyUnicode_FromStringAndSize_t) (const char *s, Py_ssize_t size);
+static PLyUnicode_FromStringAndSize_t PLyUnicode_FromStringAndSize_p;
+#endif
+
+/* Linkage to functions in hstore module */
+typedef HStore *(*hstoreUpgrade_t) (Datum orig);
+static hstoreUpgrade_t hstoreUpgrade_p;
+typedef int (*hstoreUniquePairs_t) (Pairs *a, int32 l, int32 *buflen);
+static hstoreUniquePairs_t hstoreUniquePairs_p;
+typedef HStore *(*hstorePairs_t) (Pairs *pairs, int32 pcount, int32 buflen);
+static hstorePairs_t hstorePairs_p;
+typedef size_t (*hstoreCheckKeyLen_t) (size_t len);
+static hstoreCheckKeyLen_t hstoreCheckKeyLen_p;
+typedef size_t (*hstoreCheckValLen_t) (size_t len);
+static hstoreCheckValLen_t hstoreCheckValLen_p;
+
+
+/*
+ * Module initialize function: fetch function pointers for cross-module calls.
+ */
+void
+_PG_init(void)
+{
+	/* Asserts verify that typedefs above match original declarations */
+	AssertVariableIsOfType(&PLyObject_AsString, PLyObject_AsString_t);
+	PLyObject_AsString_p = (PLyObject_AsString_t)
+		load_external_function("$libdir/" PLPYTHON_LIBNAME, "PLyObject_AsString",
+							   true, NULL);
+#if PY_MAJOR_VERSION >= 3
+	AssertVariableIsOfType(&PLyUnicode_FromStringAndSize, PLyUnicode_FromStringAndSize_t);
+	PLyUnicode_FromStringAndSize_p = (PLyUnicode_FromStringAndSize_t)
+		load_external_function("$libdir/" PLPYTHON_LIBNAME, "PLyUnicode_FromStringAndSize",
+							   true, NULL);
+#endif
+	AssertVariableIsOfType(&hstoreUpgrade, hstoreUpgrade_t);
+	hstoreUpgrade_p = (hstoreUpgrade_t)
+		load_external_function("$libdir/hstore", "hstoreUpgrade",
+							   true, NULL);
+	AssertVariableIsOfType(&hstoreUniquePairs, hstoreUniquePairs_t);
+	hstoreUniquePairs_p = (hstoreUniquePairs_t)
+		load_external_function("$libdir/hstore", "hstoreUniquePairs",
+							   true, NULL);
+	AssertVariableIsOfType(&hstorePairs, hstorePairs_t);
+	hstorePairs_p = (hstorePairs_t)
+		load_external_function("$libdir/hstore", "hstorePairs",
+							   true, NULL);
+	AssertVariableIsOfType(&hstoreCheckKeyLen, hstoreCheckKeyLen_t);
+	hstoreCheckKeyLen_p = (hstoreCheckKeyLen_t)
+		load_external_function("$libdir/hstore", "hstoreCheckKeyLen",
+							   true, NULL);
+	AssertVariableIsOfType(&hstoreCheckValLen, hstoreCheckValLen_t);
+	hstoreCheckValLen_p = (hstoreCheckValLen_t)
+		load_external_function("$libdir/hstore", "hstoreCheckValLen",
+							   true, NULL);
+}
+
+
+/* These defines must be after the module init function */
+#define PLyObject_AsString PLyObject_AsString_p
+#define PLyUnicode_FromStringAndSize PLyUnicode_FromStringAndSize_p
+#define hstoreUpgrade hstoreUpgrade_p
+#define hstoreUniquePairs hstoreUniquePairs_p
+#define hstorePairs hstorePairs_p
+#define hstoreCheckKeyLen hstoreCheckKeyLen_p
+#define hstoreCheckValLen hstoreCheckValLen_p
+
+
+PG_FUNCTION_INFO_V1(hstore_to_plpython);
+
+Datum
+hstore_to_plpython(PG_FUNCTION_ARGS)
+{
+	HStore	   *in = PG_GETARG_HSTORE_P(0);
+	int			i;
+	int			count = HS_COUNT(in);
+	char	   *base = STRPTR(in);
+	HEntry	   *entries = ARRPTR(in);
+	PyObject   *dict;
+
+	dict = PyDict_New();
+	if (!dict)
+		ereport(ERROR,
+				(errcode(ERRCODE_OUT_OF_MEMORY),
+				 errmsg("out of memory")));
+
+	for (i = 0; i < count; i++)
+	{
+		PyObject   *key;
+
+		key = PyString_FromStringAndSize(HSTORE_KEY(entries, base, i),
+										 HSTORE_KEYLEN(entries, i));
+		if (HSTORE_VALISNULL(entries, i))
+			PyDict_SetItem(dict, key, Py_None);
+		else
+		{
+			PyObject   *value;
+
+			value = PyString_FromStringAndSize(HSTORE_VAL(entries, base, i),
+											   HSTORE_VALLEN(entries, i));
+			PyDict_SetItem(dict, key, value);
+			Py_XDECREF(value);
+		}
+		Py_XDECREF(key);
+	}
+
+	return PointerGetDatum(dict);
+}
+
+
+PG_FUNCTION_INFO_V1(plpython_to_hstore);
+
+Datum
+plpython_to_hstore(PG_FUNCTION_ARGS)
+{
+	PyObject   *dict;
+	PyObject   *volatile items;
+	Py_ssize_t	pcount;
+	HStore	   *volatile out;
+
+	dict = (PyObject *) PG_GETARG_POINTER(0);
+	if (!PyMapping_Check(dict))
+		ereport(ERROR,
+				(errcode(ERRCODE_WRONG_OBJECT_TYPE),
+				 errmsg("not a Python mapping")));
+
+	pcount = PyMapping_Size(dict);
+	items = PyMapping_Items(dict);
+
+	PG_TRY();
+	{
+		int32		buflen;
+		Py_ssize_t	i;
+		Pairs	   *pairs;
+
+		pairs = palloc(pcount * sizeof(*pairs));
+
+		for (i = 0; i < pcount; i++)
+		{
+			PyObject   *tuple;
+			PyObject   *key;
+			PyObject   *value;
+
+			tuple = PyList_GetItem(items, i);
+			key = PyTuple_GetItem(tuple, 0);
+			value = PyTuple_GetItem(tuple, 1);
+
+			pairs[i].key = PLyObject_AsString(key);
+			pairs[i].keylen = hstoreCheckKeyLen(strlen(pairs[i].key));
+			pairs[i].needfree = true;
+
+			if (value == Py_None)
+			{
+				pairs[i].val = NULL;
+				pairs[i].vallen = 0;
+				pairs[i].isnull = true;
+			}
+			else
+			{
+				pairs[i].val = PLyObject_AsString(value);
+				pairs[i].vallen = hstoreCheckValLen(strlen(pairs[i].val));
+				pairs[i].isnull = false;
+			}
+		}
+
+		pcount = hstoreUniquePairs(pairs, pcount, &buflen);
+		out = hstorePairs(pairs, pcount, buflen);
+	}
+	PG_FINALLY();
+	{
+		Py_DECREF(items);
+	}
+	PG_END_TRY();
+
+	PG_RETURN_POINTER(out);
+}
diff --git a/contrib/hstore_plpython/hstore_plpython2u--1.0.sql b/contrib/hstore_plpython/hstore_plpython2u--1.0.sql
new file mode 100644
index 0000000..800765f
--- /dev/null
+++ b/contrib/hstore_plpython/hstore_plpython2u--1.0.sql
@@ -0,0 +1,19 @@
+/* contrib/hstore_plpython/hstore_plpython2u--1.0.sql */
+
+-- complain if script is sourced in psql, rather than via CREATE EXTENSION
+\echo Use "CREATE EXTENSION hstore_plpython2u" to load this file. \quit
+
+CREATE FUNCTION hstore_to_plpython2(val internal) RETURNS internal
+LANGUAGE C STRICT IMMUTABLE
+AS 'MODULE_PATHNAME', 'hstore_to_plpython';
+
+CREATE FUNCTION plpython2_to_hstore(val internal) RETURNS hstore
+LANGUAGE C STRICT IMMUTABLE
+AS 'MODULE_PATHNAME', 'plpython_to_hstore';
+
+CREATE TRANSFORM FOR hstore LANGUAGE plpython2u (
+    FROM SQL WITH FUNCTION hstore_to_plpython2(internal),
+    TO SQL WITH FUNCTION plpython2_to_hstore(internal)
+);
+
+COMMENT ON TRANSFORM FOR hstore LANGUAGE plpython2u IS 'transform between hstore and Python dict';
diff --git a/contrib/hstore_plpython/hstore_plpython2u.control b/contrib/hstore_plpython/hstore_plpython2u.control
new file mode 100644
index 0000000..ed90567
--- /dev/null
+++ b/contrib/hstore_plpython/hstore_plpython2u.control
@@ -0,0 +1,6 @@
+# hstore_plpython2u extension
+comment = 'transform between hstore and plpython2u'
+default_version = '1.0'
+module_pathname = '$libdir/hstore_plpython2'
+relocatable = true
+requires = 'hstore,plpython2u'
diff --git a/contrib/hstore_plpython/hstore_plpython3u--1.0.sql b/contrib/hstore_plpython/hstore_plpython3u--1.0.sql
new file mode 100644
index 0000000..0b410ab
--- /dev/null
+++ b/contrib/hstore_plpython/hstore_plpython3u--1.0.sql
@@ -0,0 +1,19 @@
+/* contrib/hstore_plpython/hstore_plpython3u--1.0.sql */
+
+-- complain if script is sourced in psql, rather than via CREATE EXTENSION
+\echo Use "CREATE EXTENSION hstore_plpython3u" to load this file. \quit
+
+CREATE FUNCTION hstore_to_plpython3(val internal) RETURNS internal
+LANGUAGE C STRICT IMMUTABLE
+AS 'MODULE_PATHNAME', 'hstore_to_plpython';
+
+CREATE FUNCTION plpython3_to_hstore(val internal) RETURNS hstore
+LANGUAGE C STRICT IMMUTABLE
+AS 'MODULE_PATHNAME', 'plpython_to_hstore';
+
+CREATE TRANSFORM FOR hstore LANGUAGE plpython3u (
+    FROM SQL WITH FUNCTION hstore_to_plpython3(internal),
+    TO SQL WITH FUNCTION plpython3_to_hstore(internal)
+);
+
+COMMENT ON TRANSFORM FOR hstore LANGUAGE plpython3u IS 'transform between hstore and Python dict';
diff --git a/contrib/hstore_plpython/hstore_plpython3u.control b/contrib/hstore_plpython/hstore_plpython3u.control
new file mode 100644
index 0000000..d86f38e
--- /dev/null
+++ b/contrib/hstore_plpython/hstore_plpython3u.control
@@ -0,0 +1,6 @@
+# hstore_plpython3u extension
+comment = 'transform between hstore and plpython3u'
+default_version = '1.0'
+module_pathname = '$libdir/hstore_plpython3'
+relocatable = true
+requires = 'hstore,plpython3u'
diff --git a/contrib/hstore_plpython/hstore_plpythonu--1.0.sql b/contrib/hstore_plpython/hstore_plpythonu--1.0.sql
new file mode 100644
index 0000000..5283291
--- /dev/null
+++ b/contrib/hstore_plpython/hstore_plpythonu--1.0.sql
@@ -0,0 +1,19 @@
+/* contrib/hstore_plpython/hstore_plpythonu--1.0.sql */
+
+-- complain if script is sourced in psql, rather than via CREATE EXTENSION
+\echo Use "CREATE EXTENSION hstore_plpythonu" to load this file. \quit
+
+CREATE FUNCTION hstore_to_plpython(val internal) RETURNS internal
+LANGUAGE C STRICT IMMUTABLE
+AS 'MODULE_PATHNAME';
+
+CREATE FUNCTION plpython_to_hstore(val internal) RETURNS hstore
+LANGUAGE C STRICT IMMUTABLE
+AS 'MODULE_PATHNAME';
+
+CREATE TRANSFORM FOR hstore LANGUAGE plpythonu (
+    FROM SQL WITH FUNCTION hstore_to_plpython(internal),
+    TO SQL WITH FUNCTION plpython_to_hstore(internal)
+);
+
+COMMENT ON TRANSFORM FOR hstore LANGUAGE plpythonu IS 'transform between hstore and Python dict';
diff --git a/contrib/hstore_plpython/hstore_plpythonu.control b/contrib/hstore_plpython/hstore_plpythonu.control
new file mode 100644
index 0000000..8e9b35e
--- /dev/null
+++ b/contrib/hstore_plpython/hstore_plpythonu.control
@@ -0,0 +1,6 @@
+# hstore_plpythonu extension
+comment = 'transform between hstore and plpythonu'
+default_version = '1.0'
+module_pathname = '$libdir/hstore_plpython2'
+relocatable = true
+requires = 'hstore,plpythonu'
diff --git a/contrib/hstore_plpython/sql/hstore_plpython.sql b/contrib/hstore_plpython/sql/hstore_plpython.sql
new file mode 100644
index 0000000..b6d98b7
--- /dev/null
+++ b/contrib/hstore_plpython/sql/hstore_plpython.sql
@@ -0,0 +1,119 @@
+CREATE EXTENSION hstore_plpython2u CASCADE;
+
+
+-- test hstore -> python
+CREATE FUNCTION test1(val hstore) RETURNS int
+LANGUAGE plpythonu
+TRANSFORM FOR TYPE hstore
+AS $$
+assert isinstance(val, dict)
+plpy.info(sorted(val.items()))
+return len(val)
+$$;
+
+SELECT test1('aa=>bb, cc=>NULL'::hstore);
+
+
+-- the same with the versioned language name
+CREATE FUNCTION test1n(val hstore) RETURNS int
+LANGUAGE plpython2u
+TRANSFORM FOR TYPE hstore
+AS $$
+assert isinstance(val, dict)
+plpy.info(sorted(val.items()))
+return len(val)
+$$;
+
+SELECT test1n('aa=>bb, cc=>NULL'::hstore);
+
+
+-- test hstore[] -> python
+CREATE FUNCTION test1arr(val hstore[]) RETURNS int
+LANGUAGE plpythonu
+TRANSFORM FOR TYPE hstore
+AS $$
+assert(val == [{'aa': 'bb', 'cc': None}, {'dd': 'ee'}])
+return len(val)
+$$;
+
+SELECT test1arr(array['aa=>bb, cc=>NULL'::hstore, 'dd=>ee']);
+
+
+-- test python -> hstore
+CREATE FUNCTION test2(a int, b text) RETURNS hstore
+LANGUAGE plpythonu
+TRANSFORM FOR TYPE hstore
+AS $$
+val = {'a': a, 'b': b, 'c': None}
+return val
+$$;
+
+SELECT test2(1, 'boo');
+
+--- test ruleutils
+\sf test2
+
+
+-- test python -> hstore[]
+CREATE FUNCTION test2arr() RETURNS hstore[]
+LANGUAGE plpythonu
+TRANSFORM FOR TYPE hstore
+AS $$
+val = [{'a': 1, 'b': 'boo', 'c': None}, {'d': 2}]
+return val
+$$;
+
+SELECT test2arr();
+
+
+-- test python -> domain over hstore
+CREATE DOMAIN hstore_foo AS hstore CHECK(VALUE ? 'foo');
+
+CREATE FUNCTION test2dom(fn text) RETURNS hstore_foo
+LANGUAGE plpythonu
+TRANSFORM FOR TYPE hstore
+AS $$
+return {'a': 1, fn: 'boo', 'c': None}
+$$;
+
+SELECT test2dom('foo');
+SELECT test2dom('bar');  -- fail
+
+
+-- test as part of prepare/execute
+CREATE FUNCTION test3() RETURNS void
+LANGUAGE plpythonu
+TRANSFORM FOR TYPE hstore
+AS $$
+rv = plpy.execute("SELECT 'aa=>bb, cc=>NULL'::hstore AS col1")
+assert(rv[0]["col1"] == {'aa': 'bb', 'cc': None})
+
+val = {'a': 1, 'b': 'boo', 'c': None}
+plan = plpy.prepare("SELECT $1::text AS col1", ["hstore"])
+rv = plpy.execute(plan, [val])
+assert(rv[0]["col1"] == '"a"=>"1", "b"=>"boo", "c"=>NULL')
+$$;
+
+SELECT test3();
+
+
+-- test trigger
+CREATE TABLE test1 (a int, b hstore);
+INSERT INTO test1 VALUES (1, 'aa=>bb, cc=>NULL');
+SELECT * FROM test1;
+
+CREATE FUNCTION test4() RETURNS trigger
+LANGUAGE plpythonu
+TRANSFORM FOR TYPE hstore
+AS $$
+assert(TD["new"] == {'a': 1, 'b': {'aa': 'bb', 'cc': None}})
+if TD["new"]["a"] == 1:
+    TD["new"]["b"] = {'a': 1, 'b': 'boo', 'c': None}
+
+return "MODIFY"
+$$;
+
+CREATE TRIGGER test4 BEFORE UPDATE ON test1 FOR EACH ROW EXECUTE PROCEDURE test4();
+
+UPDATE test1 SET a = a;
+SELECT * FROM test1;