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/* diagnostics.c - present information from libpq error responses
*
* Copyright (C) 2013 Matthew Woodcraft <matthew@woodcraft.me.uk>
*
* This file is part of psycopg.
*
* psycopg2 is free software: you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* In addition, as a special exception, the copyright holders give
* permission to link this program with the OpenSSL library (or with
* modified versions of OpenSSL that use the same license as OpenSSL),
* and distribute linked combinations including the two.
*
* You must obey the GNU Lesser General Public License in all respects for
* all of the code used other than OpenSSL.
*
* psycopg2 is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
* License for more details.
*/
#define PSYCOPG_MODULE
#include "psycopg/psycopg.h"
#include "psycopg/diagnostics.h"
#include "psycopg/error.h"
/* These are new in PostgreSQL 9.3. Defining them here so that psycopg2 can
* use them with a 9.3+ server even if compiled against pre-9.3 headers. */
#ifndef PG_DIAG_SCHEMA_NAME
#define PG_DIAG_SCHEMA_NAME 's'
#endif
#ifndef PG_DIAG_TABLE_NAME
#define PG_DIAG_TABLE_NAME 't'
#endif
#ifndef PG_DIAG_COLUMN_NAME
#define PG_DIAG_COLUMN_NAME 'c'
#endif
#ifndef PG_DIAG_DATATYPE_NAME
#define PG_DIAG_DATATYPE_NAME 'd'
#endif
#ifndef PG_DIAG_CONSTRAINT_NAME
#define PG_DIAG_CONSTRAINT_NAME 'n'
#endif
/* Retrieve an error string from the exception's cursor.
*
* If the cursor or its result isn't available, return None.
*/
static PyObject *
psyco_diagnostics_get_field(diagnosticsObject *self, void *closure)
{
const char *errortext;
if (!self->err->pgres) {
Py_INCREF(Py_None);
return Py_None;
}
errortext = PQresultErrorField(self->err->pgres, (Py_intptr_t) closure);
return error_text_from_chars(self->err, errortext);
}
/* object calculated member list */
static struct PyGetSetDef diagnosticsObject_getsets[] = {
{ "severity", (getter)psyco_diagnostics_get_field, NULL,
NULL, (void*) PG_DIAG_SEVERITY },
{ "sqlstate", (getter)psyco_diagnostics_get_field, NULL,
NULL, (void*) PG_DIAG_SQLSTATE },
{ "message_primary", (getter)psyco_diagnostics_get_field, NULL,
NULL, (void*) PG_DIAG_MESSAGE_PRIMARY },
{ "message_detail", (getter)psyco_diagnostics_get_field, NULL,
NULL, (void*) PG_DIAG_MESSAGE_DETAIL },
{ "message_hint", (getter)psyco_diagnostics_get_field, NULL,
NULL, (void*) PG_DIAG_MESSAGE_HINT },
{ "statement_position", (getter)psyco_diagnostics_get_field, NULL,
NULL, (void*) PG_DIAG_STATEMENT_POSITION },
{ "internal_position", (getter)psyco_diagnostics_get_field, NULL,
NULL, (void*) PG_DIAG_INTERNAL_POSITION },
{ "internal_query", (getter)psyco_diagnostics_get_field, NULL,
NULL, (void*) PG_DIAG_INTERNAL_QUERY },
{ "context", (getter)psyco_diagnostics_get_field, NULL,
NULL, (void*) PG_DIAG_CONTEXT },
{ "schema_name", (getter)psyco_diagnostics_get_field, NULL,
NULL, (void*) PG_DIAG_SCHEMA_NAME },
{ "table_name", (getter)psyco_diagnostics_get_field, NULL,
NULL, (void*) PG_DIAG_TABLE_NAME },
{ "column_name", (getter)psyco_diagnostics_get_field, NULL,
NULL, (void*) PG_DIAG_COLUMN_NAME },
{ "datatype_name", (getter)psyco_diagnostics_get_field, NULL,
NULL, (void*) PG_DIAG_DATATYPE_NAME },
{ "constraint_name", (getter)psyco_diagnostics_get_field, NULL,
NULL, (void*) PG_DIAG_CONSTRAINT_NAME },
{ "source_file", (getter)psyco_diagnostics_get_field, NULL,
NULL, (void*) PG_DIAG_SOURCE_FILE },
{ "source_line", (getter)psyco_diagnostics_get_field, NULL,
NULL, (void*) PG_DIAG_SOURCE_LINE },
{ "source_function", (getter)psyco_diagnostics_get_field, NULL,
NULL, (void*) PG_DIAG_SOURCE_FUNCTION },
{NULL}
};
/* initialization and finalization methods */
static PyObject *
diagnostics_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
{
return type->tp_alloc(type, 0);
}
static int
diagnostics_init(diagnosticsObject *self, PyObject *args, PyObject *kwds)
{
PyObject *err = NULL;
if (!PyArg_ParseTuple(args, "O", &err))
return -1;
if (!PyObject_TypeCheck(err, &errorType)) {
PyErr_SetString(PyExc_TypeError,
"The argument must be a psycopg2.Error");
return -1;
}
Py_INCREF(err);
self->err = (errorObject *)err;
return 0;
}
static int
diagnostics_traverse(diagnosticsObject *self, visitproc visit, void *arg)
{
Py_VISIT(self->err);
return 0;
}
static void
diagnostics_dealloc(diagnosticsObject* self)
{
Py_CLEAR(self->err);
Py_TYPE(self)->tp_free((PyObject *)self);
}
static void
diagnostics_del(PyObject* self)
{
PyObject_GC_Del(self);
}
/* object type */
static const char diagnosticsType_doc[] =
"Details from a database error report.\n\n"
"The object is returned by the `~psycopg2.Error.diag` attribute of the\n"
"`!Error` object.\n"
"All the information available from the |PQresultErrorField|_ function\n"
"are exposed as attributes by the object, e.g. the `!severity` attribute\n"
"returns the `!PG_DIAG_SEVERITY` code. "
"Please refer to the `PostgreSQL documentation`__ for the meaning of all"
" the attributes.\n\n"
".. |PQresultErrorField| replace:: `!PQresultErrorField()`\n"
".. _PQresultErrorField: http://www.postgresql.org/docs/current/static/"
"libpq-exec.html#LIBPQ-PQRESULTERRORFIELD\n"
".. __: PQresultErrorField_\n";
PyTypeObject diagnosticsType = {
PyVarObject_HEAD_INIT(NULL, 0)
"psycopg2._psycopg.Diagnostics",
sizeof(diagnosticsObject),
0,
(destructor)diagnostics_dealloc, /*tp_dealloc*/
0, /*tp_print*/
0, /*tp_getattr*/
0, /*tp_setattr*/
0, /*tp_compare*/
0, /*tp_repr*/
0, /*tp_as_number*/
0, /*tp_as_sequence*/
0, /*tp_as_mapping*/
0, /*tp_hash */
0, /*tp_call*/
0, /*tp_str*/
0, /*tp_getattro*/
0, /*tp_setattro*/
0, /*tp_as_buffer*/
Py_TPFLAGS_DEFAULT|Py_TPFLAGS_BASETYPE|Py_TPFLAGS_HAVE_GC, /*tp_flags*/
diagnosticsType_doc, /*tp_doc*/
(traverseproc)diagnostics_traverse, /*tp_traverse*/
0, /*tp_clear*/
0, /*tp_richcompare*/
0, /*tp_weaklistoffset*/
0, /*tp_iter*/
0, /*tp_iternext*/
/* Attribute descriptor and subclassing stuff */
0, /*tp_methods*/
0, /*tp_members*/
diagnosticsObject_getsets, /*tp_getset*/
0, /*tp_base*/
0, /*tp_dict*/
0, /*tp_descr_get*/
0, /*tp_descr_set*/
0, /*tp_dictoffset*/
(initproc)diagnostics_init, /*tp_init*/
0, /*tp_alloc will be set to PyType_GenericAlloc in module init*/
diagnostics_new, /*tp_new*/
(freefunc)diagnostics_del, /*tp_free Low-level free-memory routine */
0, /*tp_is_gc For PyObject_IS_GC */
0, /*tp_bases*/
0, /*tp_mro method resolution order */
0, /*tp_cache*/
0, /*tp_subclasses*/
0 /*tp_weaklist*/
};
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