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Copy pathfunction.c
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1230 lines (1074 loc) · 27.6 KB
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/*
* Postgres functions
*/
#include <setjmp.h>
#define PY_SSIZE_T_CLEAN
#include <Python.h>
#include <compile.h>
#include <structmember.h>
#include "postgres.h"
#include "fmgr.h"
#include "funcapi.h"
#include "access/heapam.h"
#include "access/tupdesc.h"
#include "access/transam.h"
#include "catalog/pg_proc.h"
#include "catalog/pg_namespace.h"
#include "catalog/pg_type.h"
#include "executor/spi.h"
#include "mb/pg_wchar.h"
#include "nodes/params.h"
#include "parser/parse_func.h"
#include "tcop/dest.h"
#include "tcop/tcopprot.h"
#include "utils/memutils.h"
#include "utils/array.h"
#include "utils/datum.h"
#include "utils/elog.h"
#include "utils/palloc.h"
#include "utils/builtins.h"
#include "utils/syscache.h"
#include "utils/typcache.h"
#include "utils/tuplestore.h"
#include "pypg/python.h"
#include "pypg/postgres.h"
#include "pypg/pl.h"
#include "pypg/extension.h"
#include "pypg/error.h"
#include "pypg/type/type.h"
#include "pypg/type/object.h"
#include "pypg/type/system.h"
#include "pypg/type/record.h"
#include "pypg/tupledesc.h"
#include "pypg/function.h"
PyObj Py_builtins_module = NULL;
PyObj Py_compile_ob = NULL;
PyObj PYSTR(exec) = NULL;
PyObj Py_linecache_updatecache_ob = NULL;
/*
* PyPgFunction_get_source - get the function's prosrc
*/
PyObj
PyPgFunction_get_source(PyObj func)
{
PyObj src = NULL;
Assert(func != NULL);
Assert(PyPgFunction_Check(func));
src = PyPgFunction_GetSource(func);
Assert(src != NULL);
Py_INCREF(src);
return(src);
}
/*
* PyPgFunction_get_code - compile the code from the source
*/
PyObj
PyPgFunction_get_code(PyObj func)
{
PyObj prosrc, cargs, rob;
Assert(func != NULL);
Assert(PyPgFunction_Check(func));
Assert(PyPgFunction_GetFilename(func) != NULL);
prosrc = PyPgFunction_get_source(func);
if (prosrc == NULL)
return(NULL);
if (prosrc == Py_None)
{
PyErr_SetString(PyExc_TypeError, "function has no source to compile");
Py_DECREF(prosrc);
return(NULL);
}
cargs = PyTuple_New(3);
if (cargs == NULL)
return(NULL);
PyTuple_SET_ITEM(cargs, 0, prosrc);
PyTuple_SET_ITEM(cargs, 1, PyPgFunction_GetFilename(func));
PyTuple_SET_ITEM(cargs, 2, PYSTR(exec));
Py_INCREF(PyPgFunction_GetFilename(func));
Py_INCREF(PYSTR(exec));
rob = PyObject_CallObject(Py_compile_ob, cargs);
Py_DECREF(cargs);
return(rob);
}
/*
* PyPgFunction_load_module - create and load the module
*
* This execute the module body in a new module object iff the module does not
* already exist in sys.modules.
*
* The PL protocol checks are not done here because this could be called from
* the code of another function. It's the caller's responsibility to ensure that
* the appropriate checks are being made at the appropriate time.
*/
PyObj
PyPgFunction_load_module(PyObj func)
{
PyObj modules, module, modname, d, code, evalr;
int rv;
Assert(func != NULL);
Assert(PyPgFunction_Check(func));
modules = PyImport_GetModuleDict();
/*
* Module already loaded? Return it.
*/
rv = PySequence_Contains(modules, PyPgFunction_GetPyUnicodeOid(func));
if (rv == -1)
return(NULL);
else if (rv == 1)
{
/*
* If this returns NULL, it's probably some weird race condition...
* The check above said it exists, so let's trust it...
*/
return(PyObject_GetItem(modules, PyPgFunction_GetPyUnicodeOid(func)));
}
modname = PyPgFunction_GetPyUnicodeOid(func);
Py_INCREF(modname);
PyObject_StrBytes(&modname);
if (modname == NULL)
return(NULL);
/*
* No module present, initialize a new one.
*/
module = PyModule_New(PyBytes_AS_STRING(modname));
Py_DECREF(modname);
if (module == NULL)
return(NULL);
/* Use the */
d = PyModule_GetDict(module);
if (d == NULL)
{
elog(WARNING, "could not get Python module dictionary");
Py_DECREF(module);
return(NULL);
}
/*
* __loader__ PEP302 support.
* This is what linecache uses to access the function's source
*/
if (PyDict_SetItemString(d, "__loader__", func) != 0)
{
/*
* linecache can't do anything if there's no loader.
*/
Py_DECREF(module);
return(NULL);
}
if (PyDict_SetItemString(d, "__file__", PyPgFunction_GetFilename(func)) != 0)
goto fail;
if (PyDict_SetItemString(d, "__builtins__", Py_builtins_module) != 0)
goto fail;
if (PyDict_SetItemString(d, "__func__", func) != 0)
goto fail;
/*
* Module has to exist in sys.modules before code is loaded.
*/
if (PyObject_SetItem(modules, PyPgFunction_GetPyUnicodeOid(func), module) != 0)
goto fail;
/*
* Hasn't been loaded into sys.modules yet.
*/
code = PyPgFunction_get_code(func);
if (code == NULL)
goto fail;
/*
* Module context, therefore locals and globals are the same object.
*/
evalr = PyEval_EvalCode(code, d, d);
if (evalr == NULL)
{
/*
* Code evaluation failed.
* Remove the junk module from sys.modules *after* updating linecache.
*/
PyObject_DelItem(modules, PyPgFunction_GetPyUnicodeOid(func));
goto fail;
}
Py_DECREF(evalr);
Py_DECREF(code);
return(module);
fail:
/*
* Something went wrong.
* Update the linecache so that the source is accessible.
*/
Assert(d != NULL);
/*
* Ignore any errors here; should cause a context chain.
*/
{
PyObj exc, val, tb;
PyErr_Fetch(&exc, &val, &tb);
PyObject_CallFunction(Py_linecache_updatecache_ob, "OO",
PyPgFunction_GetFilename(func), d);
PyErr_Restore(exc,val,tb);
Py_XDECREF(code);
Py_XDECREF(module);
return(NULL);
}
}
/*
* Create a TupleDesc from a given pg_proc tuple's proarginfo column
*/
TupleDesc
TupleDesc_From_pg_proc_arginfo(HeapTuple ht)
{
int16 pronargs;
Datum proargtypes_datum, proargnames_datum;
bool isnull;
Oid *types;
char **names = NULL;
int nnames;
TupleDesc td;
pronargs = DatumGetInt16(SysCacheGetAttr(PROCOID, ht,
Anum_pg_proc_pronargs, &isnull)
);
if (isnull)
elog(ERROR, "pronargs is NULL");
proargtypes_datum = SysCacheGetAttr(PROCOID, ht,
Anum_pg_proc_proargtypes, &isnull);
if (isnull)
elog(ERROR, "proargtypes is NULL");
types = (Oid *) ARR_DATA_PTR(DatumGetArrayTypeP(proargtypes_datum));
proargnames_datum = SysCacheGetAttr(PROCOID, ht,
Anum_pg_proc_proargnames, &isnull);
if (isnull == false)
{
ArrayType *name_array = NULL;
Datum *name_datums;
bool *name_nulls;
/* INOUT Parameters may adjust the location of the argument name */
bool modes_isnull;
Datum proargmodes_datum;
name_array = DatumGetArrayTypeP(proargnames_datum);
deconstruct_array(
name_array, ARR_ELEMTYPE(name_array),
-1, false, 'i', &name_datums,
&name_nulls, &nnames
);
if (nnames < pronargs)
elog(ERROR, "too few names in proargnames");
if (nnames > 0)
{
names = palloc0(sizeof(char *) * pronargs);
proargmodes_datum = SysCacheGetAttr(PROCOID, ht,
Anum_pg_proc_proargmodes, &modes_isnull);
if (modes_isnull == false)
{
char *modes;
int i, k;
modes = (char *) ARR_DATA_PTR(DatumGetArrayTypeP(proargmodes_datum));
for (i = 0, k = 0; i < nnames; ++i)
{
switch (modes[i])
{
case 'b':
case 'i':
{
Datum name_d;
name_d = name_datums[i];
names[k] = (char *) DirectFunctionCall1(textout, name_d);
++k;
}
break;
case 'o':
break;
default:
{
elog(ERROR, "unknown mode \"%c\" for argument %d",
modes[i], i);
}
break;
}
}
}
else /* Don't process proargnames down here if modes is valid */
{
int i;
for (i = 0; i < nnames; ++i)
{
Datum name_d;
name_d = name_datums[i];
names[i] = (char *) DirectFunctionCall1(textout, name_d);
}
}
}
}
td = TupleDesc_FromNamesAndOids(pronargs, (const char **) names, types);
if (names != NULL)
{
int i;
if (nnames > 0)
for (i = 0; i < pronargs; ++i)
pfree(names[i]);
pfree(names);
}
return(td);
}
/*
* invalid_fullname - Used by the PEP302 interfaces
*
* This will determine whether or not the given "fullname" argument
* corresponds to an identifier of the function.
*
* While normally used only in conjunction with a reference to "__name__",
* other forms of the identifier are allowed for mere convenience.
*/
static bool
invalid_fullname(PyObj self, PyObj args, PyObj kw)
{
char *words[] = {"fullname", NULL};
PyObj fullname = NULL;
Oid fn_oid;
if (!PyPgFunction_CheckExact(self))
{
PyErr_SetString(PyExc_TypeError,
"loader method requires Postgres.Function type");
return(true);
}
if (!PyArg_ParseTupleAndKeywords(args, kw, "|O", words, &fullname))
return(true);
if (fullname == NULL
|| fullname == PyPgFunction_GetPyUnicodeOid(self)
|| fullname == PyPgFunction_GetPyLongOid(self))
return(false);
/*
* fullname is given and it's not an exact Oid object,
* so convert it to a real Oid and compare.
*/
if (Oid_FromPyObject(fullname, &fn_oid))
return(true);
if (PyPgFunction_GetOid(self) == fn_oid)
return(false);
PyErr_Format(PyExc_ImportError,
"loader cannot import module named '%lu'", fn_oid);
return(true);
}
/*
* Postgres FUNCTIONs are not packages. [PEP302]
*/
static PyObj
is_package(PyObj self, PyObj args, PyObj kw)
{
if (invalid_fullname(self, args, kw))
return(NULL);
Py_INCREF(Py_False);
return(Py_False);
}
/*
* Get the function source code. [PEP302]
*/
static PyObj
get_source(PyObj self, PyObj args, PyObj kw)
{
if (invalid_fullname(self, args, kw))
return(NULL);
return(PyPgFunction_get_source(self));
}
/*
* Get the function's compiled code object. [PEP302]
*/
static PyObj
get_code(PyObj self, PyObj args, PyObj kw)
{
if (invalid_fullname(self, args, kw))
return(NULL);
return(PyPgFunction_get_code(self));
}
/*
* def load_module(fullname) -> types.ModuleType
*
* Evaluate the function's code in a new module
* or if the fullname exists in sys.modules, return
* the existing module. [PEP302]
*
* This code must go through pl_handler in order to properly load the
* module. The execution context can dictate much about what happens during
* load time.
*
* i.e., tricky shit happens here. It may be preferrable to make the execution
* context rigging more accessible, but for now, it's the handler's job.
*/
static PyObj
load_module(PyObj self, PyObj args, PyObj kw)
{
MemoryContext former = CurrentMemoryContext;
volatile PyObj rob = NULL;
FmgrInfo flinfo;
FunctionCallInfoData fcinfo;
if (invalid_fullname(self, args, kw))
return(NULL);
/*
* Disallow execution of "anonymous" functions.
*/
flinfo.fn_addr = PyPgFunction_GetPGFunction(self);
flinfo.fn_oid = PyPgFunction_GetOid(self);
flinfo.fn_retset = false;
if (flinfo.fn_addr == NULL || flinfo.fn_oid == InvalidOid)
{
PyErr_SetString(PyExc_TypeError, "internal functions cannot be preloaded");
return(NULL);
}
flinfo.fn_nargs = -1;
flinfo.fn_extra = NULL;
flinfo.fn_mcxt = CurrentMemoryContext;
flinfo.fn_expr = NULL;
fcinfo.nargs = -1;
fcinfo.flinfo = &flinfo;
fcinfo.context = NULL;
fcinfo.resultinfo = NULL;
/*
* Better be true afterwards.
*/
fcinfo.isnull = false;
SPI_push();
PG_TRY();
{
rob = (PyObj) DatumGetPointer(FunctionCallInvoke(&fcinfo));
}
PG_CATCH();
{
rob = NULL;
PyErr_SetPgError(false);
}
PG_END_TRY();
SPI_pop();
MemoryContextSwitchTo(former);
if (fcinfo.isnull == false)
{
PyErr_SetString(PyExc_RuntimeError,
"function module load protocol did not set isnull");
rob = NULL;
}
Py_XINCREF(rob);
return(rob);
}
/*
* Create a PyPgFunction from an Oid object
*/
static PyObj
find_module(PyObj typ, PyObj args, PyObj kw)
{
char *words[] = {"fullname", "path", NULL};
PyObj fullname, path;
Oid fn_oid;
if (typ != (PyObj) &PyPgFunction_Type)
{
PyErr_SetString(PyExc_TypeError,
"find_module expects Postgres.Function as its first argument");
return(NULL);
}
if (!PyArg_ParseTupleAndKeywords(args, kw, "O|O", words, &fullname, &path))
return(NULL);
if (path != NULL && path != Py_None)
{
PyErr_SetString(PyExc_ImportError, "Postgres functions are top-level modules");
return(NULL);
}
if (Oid_FromPyObject(fullname, &fn_oid))
return(NULL);
return(PyPgFunction_FromOid(fn_oid));
}
static PyMethodDef PyPgFunction_Methods[] = {
/*
* PEP 302 Interfaces
*
* These interfaces should only be used on Python functions
*/
{"is_package", (PyCFunction) is_package, METH_VARARGS|METH_KEYWORDS,
PyDoc_STR("Always returns false. [PEP302 interface]")},
{"get_source", (PyCFunction) get_source, METH_VARARGS|METH_KEYWORDS,
PyDoc_STR("Get the function's procedure source [PEP302 interface]")},
{"get_code", (PyCFunction) get_code, METH_VARARGS|METH_KEYWORDS,
PyDoc_STR("Return the code of the source. [PEP302 interface]")},
{"load_module", (PyCFunction) load_module, METH_VARARGS|METH_KEYWORDS,
PyDoc_STR("Return a module based on the source. [PEP302 interface]")},
{"find_module", (PyCFunction) find_module, METH_VARARGS|METH_KEYWORDS|METH_CLASS,
PyDoc_STR("Get a Postgres.Function--loader--object based on the given fullname. [PEP302 interface]")},
{NULL}
};
static PyObj
func_get_pronamespace(PyObj self, void *closure)
{
PyObj rob;
rob = PyLong_FromUnsignedLong(PyPgFunction_GetNamespace(self));
return(rob);
}
static PyObj
func_get_prolang(PyObj self, void *closure)
{
PyObj rob;
rob = PyLong_FromUnsignedLong(PyPgFunction_GetLanguage(self));
return(rob);
}
static PyGetSetDef PyPgFunction_GetSet[] = {
{"namespace", func_get_pronamespace, NULL, PyDoc_STR("get the namespace oid")},
{"language", func_get_prolang, NULL, PyDoc_STR("get the language oid")},
{NULL,}
};
static PyMemberDef PyPgFunction_Members[] = {
{"oid", T_OBJECT, offsetof(struct PyPgFunction, fn_oid_int), READONLY,
PyDoc_STR("pg_proc entry's Oid")},
{"oidstr", T_OBJECT, offsetof(struct PyPgFunction, fn_oid_str), READONLY,
PyDoc_STR("pg_proc entry's Oid as a str object")},
{"nspname", T_OBJECT, offsetof(struct PyPgFunction, fn_nspname_str), READONLY,
PyDoc_STR("namespace name when the function was loaded")},
{"filename", T_OBJECT, offsetof(struct PyPgFunction, fn_filename_str), READONLY,
PyDoc_STR("regprocedure-like representation of the procedure's identifier")},
{"input", T_OBJECT, offsetof(struct PyPgFunction, fn_input), READONLY,
PyDoc_STR("the function's parameter descriptor")},
{"output", T_OBJECT, offsetof(struct PyPgFunction, fn_output), READONLY,
PyDoc_STR("the function's results")},
{"stateful", T_BOOL, offsetof(struct PyPgFunction, fn_stateful), 0,
PyDoc_STR("the function returns a send'able iterator(generator)")},
{NULL,}
};
static void
func_dealloc(PyObj self)
{
PyObj ob;
ob = PyPgFunction_GetOutput(self);
if (ob != NULL)
{
PyPgFunction_SetOutput(self, NULL);
Py_DECREF(ob);
}
ob = PyPgFunction_GetInput(self);
if (ob != NULL)
{
PyPgFunction_SetInput(self, NULL);
Py_DECREF(ob);
}
ob = PyPgFunction_GetPyUnicodeOid(self);
if (ob != NULL)
{
PyPgFunction_SetPyUnicodeOid(self, NULL);
Py_DECREF(ob);
}
ob = PyPgFunction_GetPyLongOid(self);
if (ob != NULL)
{
PyPgFunction_SetPyLongOid(self, NULL);
Py_DECREF(ob);
}
ob = PyPgFunction_GetNamespaceName(self);
if (ob != NULL)
{
PyPgFunction_SetNamespaceName(self, NULL);
Py_DECREF(ob);
}
ob = PyPgFunction_GetFilename(self);
if (ob != NULL)
{
PyPgFunction_SetFilename(self, NULL);
Py_DECREF(ob);
}
ob = PyPgFunction_GetSource(self);
if (ob != NULL)
{
PyPgFunction_SetSource(self, NULL);
Py_DECREF(ob);
}
self->ob_type->tp_free(self);
}
static PyObj
func_call(PyObj self, PyObj args, PyObj kw)
{
MemoryContext former = CurrentMemoryContext;
PyObj fn_input, fn_output, input, rob = NULL;
TupleDesc td;
FmgrInfo flinfo;
FunctionCallInfoData fcinfo;
volatile Datum datum = 0;
/*
* Disallow execution of "anonymous" functions.
*/
flinfo.fn_addr = PyPgFunction_GetPGFunction(self);
flinfo.fn_oid = PyPgFunction_GetOid(self);
flinfo.fn_retset = PyPgFunction_GetReturnsSet(self);
if (flinfo.fn_addr == NULL || flinfo.fn_oid == InvalidOid)
{
PyErr_SetString(PyExc_TypeError, "internal functions are not directly callable");
return(NULL);
}
if (flinfo.fn_retset)
{
PyErr_SetString(PyExc_NotImplementedError,
"cannot directly execute set returning functions");
return(NULL);
}
fn_input = PyPgFunction_GetInput(self);
fn_output = PyPgFunction_GetOutput(self);
if (PyPgTupleDesc_IsPolymorphic(fn_input) ||
PyPgType_IsPolymorphic(fn_output))
{
PyErr_SetString(PyExc_NotImplementedError,
"cannot directly execute polymorphic functions");
return(NULL);
}
if (PyPgType_GetOid(fn_output) == TRIGGEROID)
{
PyErr_SetString(PyExc_NotImplementedError,
"cannot directly execute TRIGGER returning functions");
return(NULL);
}
/* No access if failed transaction */
if (DB_IS_NOT_READY())
return(NULL);
td = PyPgTupleDesc_GetTupleDesc(fn_input);
/*
* Normalize the parameters.
*/
input = PyTuple_FromTupleDescAndParameters(td, args, kw);
if (input == NULL)
return(NULL);
flinfo.fn_nargs = td->natts;
flinfo.fn_extra = NULL;
flinfo.fn_mcxt = CurrentMemoryContext;
flinfo.fn_expr = NULL;
fcinfo.flinfo = &flinfo;
fcinfo.context = NULL;
fcinfo.resultinfo = NULL;
fcinfo.isnull = false;
/*
* Custom built descriptor; no dropped attributes.
*/
fcinfo.nargs = td->natts;
SPI_push();
PG_TRY();
{
Py_BuildDatumsAndNulls(td,
PyPgTupleDesc_GetTypesTuple(fn_input),
input, fcinfo.arg, fcinfo.argnull);
datum = FunctionCallInvoke(&fcinfo);
/*
* Special casing void to avoid the singleton.
*/
if (fcinfo.isnull ||
PyPgType_GetOid(fn_output) == VOIDOID)
{
rob = Py_None;
Py_INCREF(rob);
}
else
{
/*
* Some functions will return a parameter that its given.
* This is problematic if we are going to free the output
* after re-allocating as a Postgres.Object.
*/
if (PyPgType_ShouldFree(fn_output))
{
int i;
/*
* Scan for !typbyval parameters.
* When one is found, compare the datum to the result datum.
*/
for (i = 0; i < PyTuple_GET_SIZE(input); ++i)
{
PyObj param = PyTuple_GET_ITEM(input, i);
/*
* It's tempting to check the types first, but in situations
* of functions doing binary compatible coercion, it would be a
* mistake.
*/
if (PyPgType_ShouldFree(Py_TYPE(param)))
{
if (PyPgObject_GetDatum(param) == datum)
{
/*
* It's the same Datum of an argument,
* inc the ref and return the param.
*/
if (fn_output == (PyObj) Py_TYPE(param))
{
rob = param;
Py_INCREF(rob);
}
else
{
/*
* It's the same Datum, but a different type.
* Make a Copy.
*/
rob = PyPgObject_New(fn_output, datum);
}
break;
}
}
}
/*
* It's a newly allocated result? (not an argument)
*/
if (rob == NULL)
{
/*
* New result, Datum is copied into the PythonMemoryContext
*/
rob = PyPgObject_New(fn_output, datum);
/*
* Cleanup.
*/
pfree(DatumGetPointer(datum));
}
}
else
{
/* Not pfree'ing typbyval, so no need to check parameters. */
rob = PyPgObject_New(fn_output, datum);
}
}
}
PG_CATCH();
{
Py_XDECREF(rob);
rob = NULL;
PyErr_SetPgError(false);
}
PG_END_TRY();
SPI_pop();
Py_DECREF(input);
MemoryContextSwitchTo(former);
return(rob);
}
static PyObj
func_new_from_oid(PyTypeObject *subtype, Oid fn_oid, PyObj fn_oid_int, PyObj fn_oid_str)
{
volatile HeapTuple ht = NULL;
volatile PyObj rob = NULL;
Assert(OidIsValid(fn_oid));
Assert(fn_oid_int != NULL);
Assert(fn_oid_str != NULL);
rob = subtype->tp_alloc(subtype, 0);
if (rob == NULL)
return(NULL);
PyPgFunction_SetOid(rob, fn_oid);
PyPgFunction_SetStateful(rob, false);
Py_INCREF(fn_oid_int);
Py_INCREF(fn_oid_str);
PyPgFunction_SetPyLongOid(rob, fn_oid_int);
PyPgFunction_SetPyUnicodeOid(rob, fn_oid_str);
/*
* Collect the Function information from the system cache
*/
PG_TRY();
{
Form_pg_proc ps;
Form_pg_namespace ns;
FmgrInfo flinfo;
text *prosrc;
Datum prosrc_datum;
bool isnull = true;
const char *filename = NULL, *nspname, *q_nspname;
TupleDesc argdesc = NULL, result_desc = NULL;
Oid prorettype = InvalidOid;
PyObj id_str_ob = NULL, nspname_str_ob = NULL;
PyObj filename_str_ob = NULL, q_nspname_str_ob = NULL;
PyObj output = NULL, src = NULL;
PyObj input;
ht = SearchSysCache(PROCOID, fn_oid, 0, 0, 0);
if (!HeapTupleIsValid(ht))
{
ereport(ERROR,(
errcode(ERRCODE_UNDEFINED_FUNCTION),
errmsg("failed to find function at oid %d", fn_oid)
));
}
PyPgFunction_SetXMin(rob, HeapTupleHeaderGetXmin(ht->t_data));
PyPgFunction_SetItemPointer(rob, &(ht->t_self));
ps = (Form_pg_proc) GETSTRUCT(ht);
PyPgFunction_SetNamespace(rob, ps->pronamespace);
PyPgFunction_SetLanguage(rob, ps->prolang);
PyPgFunction_SetReturnsSet(rob, ps->proretset);
PyPgFunction_SetVolatile(rob, ps->provolatile);
prorettype = ps->prorettype;
prosrc_datum = SysCacheGetAttr(
PROCOID, ht, Anum_pg_proc_prosrc, &isnull);
if (!isnull)
{
prosrc = DatumGetTextPCopy(prosrc_datum);
src = PyUnicode_FromTEXT(prosrc);
PyPgFunction_SetSource(rob, src);
pfree(prosrc);
prosrc = NULL;
}
else
{
src = Py_None;
Py_INCREF(src);
PyPgFunction_SetSource(rob, src);
}
if (src == NULL)
PyErr_RelayException();
/*
* Get the function's address.
*/
fmgr_info(fn_oid, &flinfo);
PyPgFunction_SetPGFunction(rob, flinfo.fn_addr);
/*
* Build function parameters TupleDesc
*/
if (ps->pronargs > 0)
{
argdesc = TupleDesc_From_pg_proc_arginfo(ht);
input = PyPgTupleDesc_FromCopy(argdesc);
if (input == NULL)
PyErr_RelayException();
PyPgFunction_SetInput(rob, input);
FreeTupleDesc(argdesc);
}
else
{
Py_INCREF(EmptyPyPgTupleDesc);
PyPgFunction_SetInput(rob, EmptyPyPgTupleDesc);
}
/*
* If it's a registered composite,
* PyPgType_FromOid will resolve that below.
*/
if (prorettype == RECORDOID)
{
/*
* Otherwise, build out a function result tupdesc.
*/
result_desc = build_function_result_tupdesc_t(ht);
if (result_desc != NULL)
{
/*
* Anonymous composite returned by function.
*/
output = PyPgType_FromTupleDesc(result_desc);
PyPgFunction_SetOutput(rob, output);
FreeTupleDesc(result_desc);
/*
* We will certainly be using it, so bless it right now iff
* it's *not* polymorphic.
*/
if (output && !PyPgType_IsPolymorphic(output))
BlessTupleDesc(PyPgType_GetTupleDesc(output));
}
else
{
/*
* ew..
*/
goto lookup_output_type;
}
}
else
{
lookup_output_type:
output = PyPgType_FromOid(prorettype);
if (output == NULL)
PyErr_RelayException();
PyPgFunction_SetOutput(rob, output);
}
RELEASESYSCACHE(&ht);
/*
* Don't worry *too* much about leaking memory.
*/
filename = format_procedure(fn_oid);
Assert(filename != NULL);
ht = SearchSysCache(NAMESPACEOID,
PyPgFunction_GetNamespace(rob), 0, 0, 0);
if (!HeapTupleIsValid(ht))
{
pfree((char *) filename);
elog(ERROR, "function %u namespace %u does not exist",
fn_oid, PyPgFunction_GetNamespace(rob));
}