greenplumn plpy_planobject 源码
greenplumn plpy_planobject 代码
文件路径：/src/pl/plpython/plpy_planobject.c
/*
* the PLyPlan class
*
* src/pl/plpython/plpy_planobject.c
*/
#include "postgres.h"
#include "plpython.h"
#include "plpy_planobject.h"
#include "plpy_cursorobject.h"
#include "plpy_elog.h"
#include "plpy_spi.h"
#include "utils/memutils.h"
static void PLy_plan_dealloc(PyObject *arg);
static PyObject *PLy_plan_cursor(PyObject *self, PyObject *args);
static PyObject *PLy_plan_execute(PyObject *self, PyObject *args);
static PyObject *PLy_plan_status(PyObject *self, PyObject *args);
static char PLy_plan_doc[] = {
"Store a PostgreSQL plan"
};
static PyMethodDef PLy_plan_methods[] = {
{"cursor", PLy_plan_cursor, METH_VARARGS, NULL},
{"execute", PLy_plan_execute, METH_VARARGS, NULL},
{"status", PLy_plan_status, METH_VARARGS, NULL},
{NULL, NULL, 0, NULL}
};
static PyTypeObject PLy_PlanType = {
PyVarObject_HEAD_INIT(NULL, 0)
.tp_name = "PLyPlan",
.tp_basicsize = sizeof(PLyPlanObject),
.tp_dealloc = PLy_plan_dealloc,
.tp_flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE,
.tp_doc = PLy_plan_doc,
.tp_methods = PLy_plan_methods,
};
void
PLy_plan_init_type(void)
{
if (PyType_Ready(&PLy_PlanType) < 0)
elog(ERROR, "could not initialize PLy_PlanType");
}
PyObject *
PLy_plan_new(void)
{
PLyPlanObject *ob;
if ((ob = PyObject_New(PLyPlanObject, &PLy_PlanType)) == NULL)
return NULL;
ob->plan = NULL;
ob->nargs = 0;
ob->types = NULL;
ob->values = NULL;
ob->args = NULL;
ob->mcxt = NULL;
return (PyObject *) ob;
}
bool
is_PLyPlanObject(PyObject *ob)
{
return ob->ob_type == &PLy_PlanType;
}
static void
PLy_plan_dealloc(PyObject *arg)
{
PLyPlanObject *ob = (PLyPlanObject *) arg;
if (ob->plan)
{
SPI_freeplan(ob->plan);
ob->plan = NULL;
}
if (ob->mcxt)
{
MemoryContextDelete(ob->mcxt);
ob->mcxt = NULL;
}
arg->ob_type->tp_free(arg);
}
static PyObject *
PLy_plan_cursor(PyObject *self, PyObject *args)
{
PyObject *planargs = NULL;
if (!PyArg_ParseTuple(args, "|O", &planargs))
return NULL;
return PLy_cursor_plan(self, planargs);
}
static PyObject *
PLy_plan_execute(PyObject *self, PyObject *args)
{
PyObject *list = NULL;
long limit = 0;
if (!PyArg_ParseTuple(args, "|Ol", &list, &limit))
return NULL;
return PLy_spi_execute_plan(self, list, limit);
}
static PyObject *
PLy_plan_status(PyObject *self, PyObject *args)
{
if (PyArg_ParseTuple(args, ":status"))
{
Py_INCREF(Py_True);
return Py_True;
/* return PyInt_FromLong(self->status); */
}
return NULL;
}
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