endif
ifeq ($(with_python),yes)
-SUBDIRS += hstore_plpython ltree_plpython
+SUBDIRS += hstore_plpython jsonb_plpython ltree_plpython
else
-ALWAYS_SUBDIRS += hstore_plpython ltree_plpython
+ALWAYS_SUBDIRS += hstore_plpython jsonb_plpython ltree_plpython
endif
# Missing:
--- /dev/null
+# Generated subdirectories
+/expected/python3/
+/log/
+/results/
+/sql/python3/
+/tmp_check/
--- /dev/null
+# contrib/jsonb_plpython/Makefile
+
+MODULE_big = jsonb_plpython$(python_majorversion)
+OBJS = jsonb_plpython.o $(WIN32RES)
+PGFILEDESC = "jsonb_plpython - transform between jsonb and plpythonu"
+
+PG_CPPFLAGS = -I$(top_srcdir)/src/pl/plpython $(python_includespec) -DPLPYTHON_LIBNAME='"plpython$(python_majorversion)"'
+
+EXTENSION = jsonb_plpythonu jsonb_plpython2u jsonb_plpython3u
+DATA = jsonb_plpythonu--1.0.sql jsonb_plpython2u--1.0.sql jsonb_plpython3u--1.0.sql
+
+REGRESS = jsonb_plpython
+REGRESS_PLPYTHON3_MANGLE := $(REGRESS)
+
+ifdef USE_PGXS
+PG_CONFIG = pg_config
+PGXS := $(shell $(PG_CONFIG) --pgxs)
+include $(PGXS)
+else
+subdir = contrib/jsonb_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 += $(sort $(wildcard ../../src/pl/plpython/libpython*.a))
+else
+rpathdir = $(python_libdir)
+SHLIB_LINK += $(python_libspec) $(python_additional_libs)
+endif
+
+ifeq ($(python_majorversion),2)
+REGRESS_OPTS += --load-extension=plpythonu --load-extension=jsonb_plpythonu
+endif
+
+include $(top_srcdir)/src/pl/plpython/regress-python3-mangle.mk
--- /dev/null
+CREATE EXTENSION jsonb_plpython2u CASCADE;
+NOTICE: installing required extension "plpython2u"
+-- test jsonb -> python dict
+CREATE FUNCTION test1(val jsonb) RETURNS int
+LANGUAGE plpythonu
+TRANSFORM FOR TYPE jsonb
+AS $$
+assert isinstance(val, dict)
+plpy.info(sorted(val.items()))
+return len(val)
+$$;
+SELECT test1('{"a": 1, "c": "NULL"}'::jsonb);
+INFO: [('a', Decimal('1')), ('c', 'NULL')]
+ test1
+-------
+ 2
+(1 row)
+
+-- test jsonb -> python dict
+-- complex dict with dicts as value
+CREATE FUNCTION test1complex(val jsonb) RETURNS int
+LANGUAGE plpython2u
+TRANSFORM FOR TYPE jsonb
+AS $$
+assert isinstance(val, dict)
+assert(val == {"d": {"d": 1}})
+return len(val)
+$$;
+SELECT test1complex('{"d": {"d": 1}}'::jsonb);
+ test1complex
+--------------
+ 1
+(1 row)
+
+-- test jsonb[] -> python dict
+-- dict with array as value
+CREATE FUNCTION test1arr(val jsonb) RETURNS int
+LANGUAGE plpythonu
+TRANSFORM FOR TYPE jsonb
+AS $$
+assert isinstance(val, dict)
+assert(val == {"d": [12, 1]})
+return len(val)
+$$;
+SELECT test1arr('{"d":[12, 1]}'::jsonb);
+ test1arr
+----------
+ 1
+(1 row)
+
+-- test jsonb[] -> python list
+-- simple list
+CREATE FUNCTION test2arr(val jsonb) RETURNS int
+LANGUAGE plpythonu
+TRANSFORM FOR TYPE jsonb
+AS $$
+assert isinstance(val, list)
+assert(val == [12, 1])
+return len(val)
+$$;
+SELECT test2arr('[12, 1]'::jsonb);
+ test2arr
+----------
+ 2
+(1 row)
+
+-- test jsonb[] -> python list
+-- array of dicts
+CREATE FUNCTION test3arr(val jsonb) RETURNS int
+LANGUAGE plpythonu
+TRANSFORM FOR TYPE jsonb
+AS $$
+assert isinstance(val, list)
+assert(val == [{"a": 1,"b": 2}, {"c": 3,"d": 4}])
+return len(val)
+$$;
+SELECT test3arr('[{"a": 1, "b": 2}, {"c": 3,"d": 4}]'::jsonb);
+ test3arr
+----------
+ 2
+(1 row)
+
+-- test jsonb int -> python int
+CREATE FUNCTION test1int(val jsonb) RETURNS int
+LANGUAGE plpythonu
+TRANSFORM FOR TYPE jsonb
+AS $$
+assert(val == 1)
+return val
+$$;
+SELECT test1int('1'::jsonb);
+ test1int
+----------
+ 1
+(1 row)
+
+-- test jsonb string -> python string
+CREATE FUNCTION test1string(val jsonb) RETURNS text
+LANGUAGE plpythonu
+TRANSFORM FOR TYPE jsonb
+AS $$
+assert(val == "a")
+return val
+$$;
+SELECT test1string('"a"'::jsonb);
+ test1string
+-------------
+ a
+(1 row)
+
+-- test jsonb null -> python None
+CREATE FUNCTION test1null(val jsonb) RETURNS int
+LANGUAGE plpythonu
+TRANSFORM FOR TYPE jsonb
+AS $$
+assert(val == None)
+return 1
+$$;
+SELECT test1null('null'::jsonb);
+ test1null
+-----------
+ 1
+(1 row)
+
+-- test python -> jsonb
+CREATE FUNCTION roundtrip(val jsonb) RETURNS jsonb
+LANGUAGE plpythonu
+TRANSFORM FOR TYPE jsonb
+as $$
+return val
+$$;
+SELECT roundtrip('null'::jsonb);
+ roundtrip
+-----------
+
+(1 row)
+
+SELECT roundtrip('1'::jsonb);
+ roundtrip
+-----------
+ 1
+(1 row)
+
+SELECT roundtrip('1234567890.0987654321'::jsonb);
+ roundtrip
+-----------------------
+ 1234567890.0987654321
+(1 row)
+
+SELECT roundtrip('-1234567890.0987654321'::jsonb);
+ roundtrip
+------------------------
+ -1234567890.0987654321
+(1 row)
+
+SELECT roundtrip('true'::jsonb);
+ roundtrip
+-----------
+ true
+(1 row)
+
+SELECT roundtrip('"string"'::jsonb);
+ roundtrip
+-----------
+ "string"
+(1 row)
+
+SELECT roundtrip('{"1": null}'::jsonb);
+ roundtrip
+-------------
+ {"1": null}
+(1 row)
+
+SELECT roundtrip('{"1": 1}'::jsonb);
+ roundtrip
+-----------
+ {"1": 1}
+(1 row)
+
+SELECT roundtrip('{"1": true}'::jsonb);
+ roundtrip
+-------------
+ {"1": true}
+(1 row)
+
+SELECT roundtrip('{"1": "string"}'::jsonb);
+ roundtrip
+-----------------
+ {"1": "string"}
+(1 row)
+
+SELECT roundtrip('[null]'::jsonb);
+ roundtrip
+-----------
+ [null]
+(1 row)
+
+SELECT roundtrip('[1]'::jsonb);
+ roundtrip
+-----------
+ [1]
+(1 row)
+
+SELECT roundtrip('[true]'::jsonb);
+ roundtrip
+-----------
+ [true]
+(1 row)
+
+SELECT roundtrip('["string"]'::jsonb);
+ roundtrip
+------------
+ ["string"]
+(1 row)
+
+SELECT roundtrip('[null, 1]'::jsonb);
+ roundtrip
+-----------
+ [null, 1]
+(1 row)
+
+SELECT roundtrip('[1, true]'::jsonb);
+ roundtrip
+-----------
+ [1, true]
+(1 row)
+
+SELECT roundtrip('[true, "string"]'::jsonb);
+ roundtrip
+------------------
+ [true, "string"]
+(1 row)
+
+SELECT roundtrip('["string", "string2"]'::jsonb);
+ roundtrip
+-----------------------
+ ["string", "string2"]
+(1 row)
+
+-- test python infinity -> jsonb
+CREATE FUNCTION test1inf() RETURNS jsonb
+LANGUAGE plpythonu
+TRANSFORM FOR TYPE jsonb
+AS $$
+x = float('inf')
+print(x)
+return x
+$$;
+SELECT test1inf();
+ERROR: could not convert value "inf" to jsonb
+CONTEXT: while creating return value
+PL/Python function "test1inf"
+-- test python -infinity -> jsonb
+CREATE FUNCTION test2inf() RETURNS jsonb
+LANGUAGE plpythonu
+TRANSFORM FOR TYPE jsonb
+AS $$
+x = float('-inf')
+print(x)
+return x
+$$;
+SELECT test2inf();
+ERROR: could not convert value "-inf" to jsonb
+CONTEXT: while creating return value
+PL/Python function "test2inf"
+-- test python NaN -> jsonb
+CREATE FUNCTION test1nan() RETURNS jsonb
+LANGUAGE plpythonu
+TRANSFORM FOR TYPE jsonb
+AS $$
+x = float('nan')
+return x
+$$;
+SELECT test1nan();
+ test1nan
+----------
+ NaN
+(1 row)
+
+-- complex numbers -> jsonb
+CREATE FUNCTION testComplexNumbers() RETURNS jsonb
+LANGUAGE plpythonu
+TRANSFORM FOR TYPE jsonb
+AS $$
+x = 1 + 2j
+return x
+$$;
+SELECT testComplexNumbers();
+ERROR: could not convert value "(1+2j)" to jsonb
+CONTEXT: while creating return value
+PL/Python function "testcomplexnumbers"
+-- range -> jsonb
+CREATE FUNCTION testRange() RETURNS jsonb
+LANGUAGE plpythonu
+TRANSFORM FOR TYPE jsonb
+AS $$
+x = range(3)
+return x
+$$;
+SELECT testRange();
+ testrange
+-----------
+ [0, 1, 2]
+(1 row)
+
+-- 0xff -> jsonb
+CREATE FUNCTION testDecimal() RETURNS jsonb
+LANGUAGE plpythonu
+TRANSFORM FOR TYPE jsonb
+AS $$
+x = 0xff
+return x
+$$;
+SELECT testDecimal();
+ testdecimal
+-------------
+ 255
+(1 row)
+
+-- tuple -> jsonb
+CREATE FUNCTION testTuple() RETURNS jsonb
+LANGUAGE plpythonu
+TRANSFORM FOR TYPE jsonb
+AS $$
+x = (1, 'String', None)
+return x
+$$;
+SELECT testTuple();
+ testtuple
+---------------------
+ [1, "String", null]
+(1 row)
+
+-- interesting dict -> jsonb
+CREATE FUNCTION test_dict1() RETURNS jsonb
+LANGUAGE plpythonu
+TRANSFORM FOR TYPE jsonb
+AS $$
+x = {"a": 1, None: 2, 33: 3}
+return x
+$$;
+SELECT test_dict1();
+ test_dict1
+--------------------------
+ {"": 2, "a": 1, "33": 3}
+(1 row)
+
--- /dev/null
+#include "postgres.h"
+
+#include "plpython.h"
+#include "plpy_elog.h"
+#include "plpy_typeio.h"
+#include "utils/jsonb.h"
+#include "utils/fmgrprotos.h"
+
+PG_MODULE_MAGIC;
+
+void _PG_init(void);
+
+/* for PLyObject_AsString in plpy_typeio.c */
+typedef char *(*PLyObject_AsString_t) (PyObject *plrv);
+static PLyObject_AsString_t PLyObject_AsString_p;
+
+typedef void (*PLy_elog_impl_t) (int elevel, const char *fmt,...);
+static PLy_elog_impl_t PLy_elog_impl_p;
+
+/*
+ * decimal_constructor is a function from python library and used
+ * for transforming strings into python decimal type
+ */
+static PyObject *decimal_constructor;
+
+static PyObject *PLyObject_FromJsonbContainer(JsonbContainer *jsonb);
+static JsonbValue *PLyObject_ToJsonbValue(PyObject *obj,
+ JsonbParseState **jsonb_state, bool is_elem);
+
+#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
+
+/*
+ * 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(&PLy_elog_impl, PLy_elog_impl_t);
+ PLy_elog_impl_p = (PLy_elog_impl_t)
+ load_external_function("$libdir/" PLPYTHON_LIBNAME, "PLy_elog_impl",
+ true, NULL);
+}
+
+/* These defines must be after the _PG_init */
+#define PLyObject_AsString (PLyObject_AsString_p)
+#define PLyUnicode_FromStringAndSize (PLyUnicode_FromStringAndSize_p)
+#undef PLy_elog
+#define PLy_elog (PLy_elog_impl_p)
+
+/*
+ * PLyString_FromJsonbValue
+ *
+ * Transform string JsonbValue to Python string.
+ */
+static PyObject *
+PLyString_FromJsonbValue(JsonbValue *jbv)
+{
+ Assert(jbv->type == jbvString);
+
+ return PyString_FromStringAndSize(jbv->val.string.val, jbv->val.string.len);
+}
+
+/*
+ * PLyString_ToJsonbValue
+ *
+ * Transform Python string to JsonbValue.
+ */
+static void
+PLyString_ToJsonbValue(PyObject *obj, JsonbValue *jbvElem)
+{
+ jbvElem->type = jbvString;
+ jbvElem->val.string.val = PLyObject_AsString(obj);
+ jbvElem->val.string.len = strlen(jbvElem->val.string.val);
+}
+
+/*
+ * PLyObject_FromJsonbValue
+ *
+ * Transform JsonbValue to PyObject.
+ */
+static PyObject *
+PLyObject_FromJsonbValue(JsonbValue *jsonbValue)
+{
+ switch (jsonbValue->type)
+ {
+ case jbvNull:
+ Py_RETURN_NONE;
+
+ case jbvBinary:
+ return PLyObject_FromJsonbContainer(jsonbValue->val.binary.data);
+
+ case jbvNumeric:
+ {
+ Datum num;
+ char *str;
+
+ num = NumericGetDatum(jsonbValue->val.numeric);
+ str = DatumGetCString(DirectFunctionCall1(numeric_out, num));
+
+ return PyObject_CallFunction(decimal_constructor, "s", str);
+ }
+
+ case jbvString:
+ return PLyString_FromJsonbValue(jsonbValue);
+
+ case jbvBool:
+ if (jsonbValue->val.boolean)
+ Py_RETURN_TRUE;
+ else
+ Py_RETURN_FALSE;
+
+ default:
+ elog(ERROR, "unexpected jsonb value type: %d", jsonbValue->type);
+ return NULL;
+ }
+}
+
+/*
+ * PLyObject_FromJsonb
+ *
+ * Transform JsonbContainer to PyObject.
+ */
+static PyObject *
+PLyObject_FromJsonbContainer(JsonbContainer *jsonb)
+{
+ JsonbIteratorToken r;
+ JsonbValue v;
+ JsonbIterator *it;
+ PyObject *result;
+
+ it = JsonbIteratorInit(jsonb);
+ r = JsonbIteratorNext(&it, &v, true);
+
+ switch (r)
+ {
+ case WJB_BEGIN_ARRAY:
+ if (v.val.array.rawScalar)
+ {
+ JsonbValue tmp;
+
+ if ((r = JsonbIteratorNext(&it, &v, true)) != WJB_ELEM ||
+ (r = JsonbIteratorNext(&it, &tmp, true)) != WJB_END_ARRAY ||
+ (r = JsonbIteratorNext(&it, &tmp, true)) != WJB_DONE)
+ elog(ERROR, "unexpected jsonb token: %d", r);
+
+ result = PLyObject_FromJsonbValue(&v);
+ }
+ else
+ {
+ /* array in v */
+ result = PyList_New(0);
+ if (!result)
+ return NULL;
+
+ while ((r = JsonbIteratorNext(&it, &v, true)) != WJB_DONE)
+ {
+ if (r == WJB_ELEM)
+ {
+ PyObject *elem = PLyObject_FromJsonbValue(&v);
+
+ PyList_Append(result, elem);
+ Py_XDECREF(elem);
+ }
+ }
+ }
+ break;
+
+ case WJB_BEGIN_OBJECT:
+ result = PyDict_New();
+ if (!result)
+ return NULL;
+
+ while ((r = JsonbIteratorNext(&it, &v, true)) != WJB_DONE)
+ {
+ if (r == WJB_KEY)
+ {
+ PyObject *key = PLyString_FromJsonbValue(&v);
+
+ if (!key)
+ return NULL;
+
+ r = JsonbIteratorNext(&it, &v, true);
+
+ if (r == WJB_VALUE)
+ {
+ PyObject *value = PLyObject_FromJsonbValue(&v);
+
+ if (!value)
+ {
+ Py_XDECREF(key);
+ return NULL;
+ }
+
+ PyDict_SetItem(result, key, value);
+ Py_XDECREF(value);
+ }
+
+ Py_XDECREF(key);
+ }
+ }
+ break;
+
+ default:
+ elog(ERROR, "unexpected jsonb token: %d", r);
+ return NULL;
+ }
+
+ return result;
+}
+
+/*
+ * PLyMapping_ToJsonbValue
+ *
+ * Transform Python dict to JsonbValue.
+ */
+static JsonbValue *
+PLyMapping_ToJsonbValue(PyObject *obj, JsonbParseState **jsonb_state)
+{
+ Py_ssize_t pcount;
+ JsonbValue *out = NULL;
+
+ /* We need it volatile, since we use it after longjmp */
+ volatile PyObject *items_v = NULL;
+
+ pcount = PyMapping_Size(obj);
+ items_v = PyMapping_Items(obj);
+
+ PG_TRY();
+ {
+ Py_ssize_t i;
+ PyObject *items;
+
+ items = (PyObject *) items_v;
+
+ pushJsonbValue(jsonb_state, WJB_BEGIN_OBJECT, NULL);
+
+ for (i = 0; i < pcount; i++)
+ {
+ JsonbValue jbvKey;
+ PyObject *item = PyList_GetItem(items, i);
+ PyObject *key = PyTuple_GetItem(item, 0);
+ PyObject *value = PyTuple_GetItem(item, 1);
+
+ /* Python dictionary can have None as key */
+ if (key == Py_None)
+ {
+ jbvKey.type = jbvString;
+ jbvKey.val.string.len = 0;
+ jbvKey.val.string.val = "";
+ }
+ else
+ {
+ /* All others types of keys we serialize to string */
+ PLyString_ToJsonbValue(key, &jbvKey);
+ }
+
+ (void) pushJsonbValue(jsonb_state, WJB_KEY, &jbvKey);
+ (void) PLyObject_ToJsonbValue(value, jsonb_state, false);
+ }
+
+ out = pushJsonbValue(jsonb_state, WJB_END_OBJECT, NULL);
+ }
+ PG_CATCH();
+ {
+ Py_DECREF(items_v);
+ PG_RE_THROW();
+ }
+ PG_END_TRY();
+
+ return out;
+}
+
+/*
+ * PLySequence_ToJsonbValue
+ *
+ * Transform python list to JsonbValue. Expects transformed PyObject and
+ * a state required for jsonb construction.
+ */
+static JsonbValue *
+PLySequence_ToJsonbValue(PyObject *obj, JsonbParseState **jsonb_state)
+{
+ Py_ssize_t i;
+ Py_ssize_t pcount;
+
+ pcount = PySequence_Size(obj);
+
+ pushJsonbValue(jsonb_state, WJB_BEGIN_ARRAY, NULL);
+
+ for (i = 0; i < pcount; i++)
+ {
+ PyObject *value = PySequence_GetItem(obj, i);
+
+ (void) PLyObject_ToJsonbValue(value, jsonb_state, true);
+ }
+
+ return pushJsonbValue(jsonb_state, WJB_END_ARRAY, NULL);
+}
+
+/*
+ * PLyNumber_ToJsonbValue(PyObject *obj)
+ *
+ * Transform python number to JsonbValue.
+ */
+static JsonbValue *
+PLyNumber_ToJsonbValue(PyObject *obj, JsonbValue *jbvNum)
+{
+ Numeric num;
+ char *str = PLyObject_AsString(obj);
+
+ PG_TRY();
+ {
+ num = DatumGetNumeric(DirectFunctionCall3(numeric_in,
+ CStringGetDatum(str), 0, -1));
+ }
+ PG_CATCH();
+ {
+ ereport(ERROR,
+ (errcode(ERRCODE_DATATYPE_MISMATCH),
+ (errmsg("could not convert value \"%s\" to jsonb", str))));
+ }
+ PG_END_TRY();
+
+ pfree(str);
+
+ jbvNum->type = jbvNumeric;
+ jbvNum->val.numeric = num;
+
+ return jbvNum;
+}
+
+/*
+ * PLyObject_ToJsonbValue(PyObject *obj)
+ *
+ * Transform python object to JsonbValue.
+ */
+static JsonbValue *
+PLyObject_ToJsonbValue(PyObject *obj, JsonbParseState **jsonb_state, bool is_elem)
+{
+ JsonbValue buf;
+ JsonbValue *out;
+
+ if (!(PyString_Check(obj) || PyUnicode_Check(obj)))
+ {
+ if (PySequence_Check(obj))
+ return PLySequence_ToJsonbValue(obj, jsonb_state);
+ else if (PyMapping_Check(obj))
+ return PLyMapping_ToJsonbValue(obj, jsonb_state);
+ }
+
+ /* Allocate JsonbValue in heap only if it is raw scalar value. */
+ if (*jsonb_state)
+ out = &buf;
+ else
+ out = palloc(sizeof(JsonbValue));
+
+ if (obj == Py_None)
+ out->type = jbvNull;
+ else if (PyString_Check(obj) || PyUnicode_Check(obj))
+ PLyString_ToJsonbValue(obj, out);
+ /*
+ * PyNumber_Check() returns true for booleans, so boolean check should come
+ * first.
+ */
+ else if (PyBool_Check(obj))
+ {
+ out = palloc(sizeof(JsonbValue));
+ out->type = jbvBool;
+ out->val.boolean = (obj == Py_True);
+ }
+ else if (PyNumber_Check(obj))
+ out = PLyNumber_ToJsonbValue(obj, out);
+ else
+ ereport(ERROR,
+ (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
+ (errmsg("Python type \"%s\" cannot be transformed to jsonb",
+ PLyObject_AsString((PyObject *) obj->ob_type)))));
+
+ /* Push result into 'jsonb_state' unless it is raw scalar value. */
+ return (*jsonb_state ?
+ pushJsonbValue(jsonb_state, is_elem ? WJB_ELEM : WJB_VALUE, out) :
+ out);
+}
+
+/*
+ * plpython_to_jsonb
+ *
+ * Transform python object to Jsonb datum
+ */
+PG_FUNCTION_INFO_V1(plpython_to_jsonb);
+Datum
+plpython_to_jsonb(PG_FUNCTION_ARGS)
+{
+ PyObject *obj;
+ JsonbValue *out;
+ JsonbParseState *jsonb_state = NULL;
+
+ obj = (PyObject *) PG_GETARG_POINTER(0);
+ out = PLyObject_ToJsonbValue(obj, &jsonb_state, true);
+ PG_RETURN_POINTER(JsonbValueToJsonb(out));
+}
+
+/*
+ * jsonb_to_plpython
+ *
+ * Transform Jsonb datum to PyObject and return it as internal.
+ */
+PG_FUNCTION_INFO_V1(jsonb_to_plpython);
+Datum
+jsonb_to_plpython(PG_FUNCTION_ARGS)
+{
+ PyObject *result;
+ Jsonb *in = PG_GETARG_JSONB_P(0);
+
+ /*
+ * Initialize pointer to Decimal constructor. First we try "cdecimal", C
+ * version of decimal library. In case of failure we use slower "decimal"
+ * module.
+ */
+ if (!decimal_constructor)
+ {
+ PyObject *decimal_module = PyImport_ImportModule("cdecimal");
+
+ if (!decimal_module)
+ {
+ PyErr_Clear();
+ decimal_module = PyImport_ImportModule("decimal");
+ }
+ Assert(decimal_module);
+ decimal_constructor = PyObject_GetAttrString(decimal_module, "Decimal");
+ }
+
+ result = PLyObject_FromJsonbContainer(&in->root);
+ if (!result)
+ PLy_elog(ERROR, "transformation from jsonb to Python failed");
+
+ return PointerGetDatum(result);
+}
--- /dev/null
+/* contrib/jsonb_plpython/jsonb_plpython2u--1.0.sql */
+
+-- complain if script is sourced in psql, rather than via CREATE EXTENSION
+\echo Use "CREATE EXTENSION jsonb_plpython2u" to load this file. \quit
+
+CREATE FUNCTION jsonb_to_plpython2(val internal) RETURNS internal
+LANGUAGE C STRICT IMMUTABLE
+AS 'MODULE_PATHNAME', 'jsonb_to_plpython';
+
+CREATE FUNCTION plpython2_to_jsonb(val internal) RETURNS jsonb
+LANGUAGE C STRICT IMMUTABLE
+AS 'MODULE_PATHNAME', 'plpython_to_jsonb';
+
+CREATE TRANSFORM FOR jsonb LANGUAGE plpython2u (
+ FROM SQL WITH FUNCTION jsonb_to_plpython2(internal),
+ TO SQL WITH FUNCTION plpython2_to_jsonb(internal)
+);
+
+COMMENT ON TRANSFORM FOR jsonb LANGUAGE plpython2u IS 'transform between jsonb and Python';
--- /dev/null
+# jsonb_plpython2u extension
+comment = 'transform between jsonb and plpython2u'
+default_version = '1.0'
+module_pathname = '$libdir/jsonb_plpython2'
+relocatable = true
+requires = 'plpython2u'
--- /dev/null
+/* contrib/jsonb_plpython/jsonb_plpython3u--1.0.sql */
+
+-- complain if script is sourced in psql, rather than via CREATE EXTENSION
+\echo Use "CREATE EXTENSION jsonb_plpython3u" to load this file. \quit
+
+CREATE FUNCTION jsonb_to_plpython3(val internal) RETURNS internal
+LANGUAGE C STRICT IMMUTABLE
+AS 'MODULE_PATHNAME', 'jsonb_to_plpython';
+
+CREATE FUNCTION plpython3_to_jsonb(val internal) RETURNS jsonb
+LANGUAGE C STRICT IMMUTABLE
+AS 'MODULE_PATHNAME', 'plpython_to_jsonb';
+
+CREATE TRANSFORM FOR jsonb LANGUAGE plpython3u (
+ FROM SQL WITH FUNCTION jsonb_to_plpython3(internal),
+ TO SQL WITH FUNCTION plpython3_to_jsonb(internal)
+);
+
+COMMENT ON TRANSFORM FOR jsonb LANGUAGE plpython3u IS 'transform between jsonb and Python';
--- /dev/null
+# jsonb_plpython3u extension
+comment = 'transform between jsonb and plpython3u'
+default_version = '1.0'
+module_pathname = '$libdir/jsonb_plpython3'
+relocatable = true
+requires = 'plpython3u'
--- /dev/null
+/* contrib/jsonb_plpython/jsonb_plpythonu--1.0.sql */
+
+-- complain if script is sourced in psql, rather than via CREATE EXTENSION
+\echo Use "CREATE EXTENSION jsonb_plpythonu" to load this file. \quit
+
+CREATE FUNCTION jsonb_to_plpython(val internal) RETURNS internal
+LANGUAGE C STRICT IMMUTABLE
+AS 'MODULE_PATHNAME';
+
+CREATE FUNCTION plpython_to_jsonb(val internal) RETURNS jsonb
+LANGUAGE C STRICT IMMUTABLE
+AS 'MODULE_PATHNAME';
+
+CREATE TRANSFORM FOR jsonb LANGUAGE plpythonu (
+ FROM SQL WITH FUNCTION jsonb_to_plpython(internal),
+ TO SQL WITH FUNCTION plpython_to_jsonb(internal)
+);
+
+COMMENT ON TRANSFORM FOR jsonb LANGUAGE plpythonu IS 'transform between jsonb and Python';
--- /dev/null
+# jsonb_plpythonu extension
+comment = 'transform between jsonb and plpythonu'
+default_version = '1.0'
+module_pathname = '$libdir/jsonb_plpython2'
+relocatable = true
+requires = 'plpythonu'
--- /dev/null
+CREATE EXTENSION jsonb_plpython2u CASCADE;
+
+-- test jsonb -> python dict
+CREATE FUNCTION test1(val jsonb) RETURNS int
+LANGUAGE plpythonu
+TRANSFORM FOR TYPE jsonb
+AS $$
+assert isinstance(val, dict)
+plpy.info(sorted(val.items()))
+return len(val)
+$$;
+
+SELECT test1('{"a": 1, "c": "NULL"}'::jsonb);
+
+-- test jsonb -> python dict
+-- complex dict with dicts as value
+CREATE FUNCTION test1complex(val jsonb) RETURNS int
+LANGUAGE plpython2u
+TRANSFORM FOR TYPE jsonb
+AS $$
+assert isinstance(val, dict)
+assert(val == {"d": {"d": 1}})
+return len(val)
+$$;
+
+SELECT test1complex('{"d": {"d": 1}}'::jsonb);
+
+
+-- test jsonb[] -> python dict
+-- dict with array as value
+CREATE FUNCTION test1arr(val jsonb) RETURNS int
+LANGUAGE plpythonu
+TRANSFORM FOR TYPE jsonb
+AS $$
+assert isinstance(val, dict)
+assert(val == {"d": [12, 1]})
+return len(val)
+$$;
+
+SELECT test1arr('{"d":[12, 1]}'::jsonb);
+
+-- test jsonb[] -> python list
+-- simple list
+CREATE FUNCTION test2arr(val jsonb) RETURNS int
+LANGUAGE plpythonu
+TRANSFORM FOR TYPE jsonb
+AS $$
+assert isinstance(val, list)
+assert(val == [12, 1])
+return len(val)
+$$;
+
+SELECT test2arr('[12, 1]'::jsonb);
+
+-- test jsonb[] -> python list
+-- array of dicts
+CREATE FUNCTION test3arr(val jsonb) RETURNS int
+LANGUAGE plpythonu
+TRANSFORM FOR TYPE jsonb
+AS $$
+assert isinstance(val, list)
+assert(val == [{"a": 1,"b": 2}, {"c": 3,"d": 4}])
+return len(val)
+$$;
+
+SELECT test3arr('[{"a": 1, "b": 2}, {"c": 3,"d": 4}]'::jsonb);
+
+-- test jsonb int -> python int
+CREATE FUNCTION test1int(val jsonb) RETURNS int
+LANGUAGE plpythonu
+TRANSFORM FOR TYPE jsonb
+AS $$
+assert(val == 1)
+return val
+$$;
+
+SELECT test1int('1'::jsonb);
+
+-- test jsonb string -> python string
+CREATE FUNCTION test1string(val jsonb) RETURNS text
+LANGUAGE plpythonu
+TRANSFORM FOR TYPE jsonb
+AS $$
+assert(val == "a")
+return val
+$$;
+
+SELECT test1string('"a"'::jsonb);
+
+-- test jsonb null -> python None
+CREATE FUNCTION test1null(val jsonb) RETURNS int
+LANGUAGE plpythonu
+TRANSFORM FOR TYPE jsonb
+AS $$
+assert(val == None)
+return 1
+$$;
+
+SELECT test1null('null'::jsonb);
+
+-- test python -> jsonb
+CREATE FUNCTION roundtrip(val jsonb) RETURNS jsonb
+LANGUAGE plpythonu
+TRANSFORM FOR TYPE jsonb
+as $$
+return val
+$$;
+
+SELECT roundtrip('null'::jsonb);
+SELECT roundtrip('1'::jsonb);
+SELECT roundtrip('1234567890.0987654321'::jsonb);
+SELECT roundtrip('-1234567890.0987654321'::jsonb);
+SELECT roundtrip('true'::jsonb);
+SELECT roundtrip('"string"'::jsonb);
+
+SELECT roundtrip('{"1": null}'::jsonb);
+SELECT roundtrip('{"1": 1}'::jsonb);
+SELECT roundtrip('{"1": true}'::jsonb);
+SELECT roundtrip('{"1": "string"}'::jsonb);
+
+SELECT roundtrip('[null]'::jsonb);
+SELECT roundtrip('[1]'::jsonb);
+SELECT roundtrip('[true]'::jsonb);
+SELECT roundtrip('["string"]'::jsonb);
+SELECT roundtrip('[null, 1]'::jsonb);
+SELECT roundtrip('[1, true]'::jsonb);
+SELECT roundtrip('[true, "string"]'::jsonb);
+SELECT roundtrip('["string", "string2"]'::jsonb);
+
+-- test python infinity -> jsonb
+CREATE FUNCTION test1inf() RETURNS jsonb
+LANGUAGE plpythonu
+TRANSFORM FOR TYPE jsonb
+AS $$
+x = float('inf')
+print(x)
+return x
+$$;
+
+SELECT test1inf();
+
+-- test python -infinity -> jsonb
+CREATE FUNCTION test2inf() RETURNS jsonb
+LANGUAGE plpythonu
+TRANSFORM FOR TYPE jsonb
+AS $$
+x = float('-inf')
+print(x)
+return x
+$$;
+
+SELECT test2inf();
+
+-- test python NaN -> jsonb
+CREATE FUNCTION test1nan() RETURNS jsonb
+LANGUAGE plpythonu
+TRANSFORM FOR TYPE jsonb
+AS $$
+x = float('nan')
+return x
+$$;
+
+SELECT test1nan();
+
+-- complex numbers -> jsonb
+CREATE FUNCTION testComplexNumbers() RETURNS jsonb
+LANGUAGE plpythonu
+TRANSFORM FOR TYPE jsonb
+AS $$
+x = 1 + 2j
+return x
+$$;
+
+SELECT testComplexNumbers();
+
+-- range -> jsonb
+CREATE FUNCTION testRange() RETURNS jsonb
+LANGUAGE plpythonu
+TRANSFORM FOR TYPE jsonb
+AS $$
+x = range(3)
+return x
+$$;
+
+SELECT testRange();
+
+-- 0xff -> jsonb
+CREATE FUNCTION testDecimal() RETURNS jsonb
+LANGUAGE plpythonu
+TRANSFORM FOR TYPE jsonb
+AS $$
+x = 0xff
+return x
+$$;
+
+SELECT testDecimal();
+
+-- tuple -> jsonb
+CREATE FUNCTION testTuple() RETURNS jsonb
+LANGUAGE plpythonu
+TRANSFORM FOR TYPE jsonb
+AS $$
+x = (1, 'String', None)
+return x
+$$;
+
+SELECT testTuple();
+
+-- interesting dict -> jsonb
+CREATE FUNCTION test_dict1() RETURNS jsonb
+LANGUAGE plpythonu
+TRANSFORM FOR TYPE jsonb
+AS $$
+x = {"a": 1, None: 2, 33: 3}
+return x
+$$;
+
+SELECT test_dict1();
compared using the default database collation.
</para>
</sect2>
+
+ <sect2>
+ <title>Transforms</title>
+
+ <para>
+ Additional extensions are available that implement transforms for the
+ <type>jsonb</type> type for the language PL/Python. The extensions for
+ PL/Python are called <literal>jsonb_plpythonu</literal>,
+ <literal>jsonb_plpython2u</literal>, and
+ <literal>jsonb_plpython3u</literal> (see <xref
+ linkend="plpython-python23"/> for the PL/Python naming convention). If you
+ use them, <type>jsonb</type> values are mapped to Python dictionaries,
+ lists, and scalars, as appropriate.
+ </para>
+ </sect2>
</sect1>
projects / postgresql.git / commitdiff