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/* cursor.h - definition for the psycopg cursor type
*
* Copyright (C) 2003 Federico Di Gregorio <fog@debian.org>
*
* This file is part of psycopg.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2,
* or (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifndef PSYCOPG_CURSOR_H
#define PSYCOPG_CURSOR_H 1
#define PY_SSIZE_T_CLEAN
#include <Python.h>
#include <libpq-fe.h>
#include "psycopg/config.h"
#include "psycopg/connection.h"
#ifdef __cplusplus
extern "C" {
#endif
extern HIDDEN PyTypeObject cursorType;
typedef struct {
PyObject_HEAD
connectionObject *conn; /* connection owning the cursor */
int closed:1; /* 1 if the cursor is closed */
int notuples:1; /* 1 if the command was not a SELECT query */
int needsfetch:1; /* 1 if a call to pq_fetch is pending */
long int rowcount; /* number of rows affected by last execute */
long int columns; /* number of columns fetched from the db */
long int arraysize; /* how many rows should fetchmany() return */
long int row; /* the row counter for fetch*() operations */
long int mark; /* transaction marker, copied from conn */
PyObject *description; /* read-only attribute: sequence of 7-item
sequences.*/
/* postgres connection stuff */
PGresult *pgres; /* result of last query */
PyObject *pgstatus; /* last message from the server after an execute */
Oid lastoid; /* last oid from an insert or InvalidOid */
PyObject *casts; /* an array (tuple) of typecast functions */
PyObject *caster; /* the current typecaster object */
PyObject *copyfile; /* file-like used during COPY TO/FROM ops */
Py_ssize_t copysize; /* size of the copy buffer during COPY TO/FROM ops */
#define DEFAULT_COPYSIZE 16384
#define DEFAULT_COPYBUFF 1024
PyObject *tuple_factory; /* factory for result tuples */
PyObject *tzinfo_factory; /* factory for tzinfo objects */
PyObject *query; /* last query executed */
char *qattr; /* quoting attr, used when quoting strings */
char *notice; /* a notice from the backend */
char *name; /* this cursor name */
PyObject *string_types; /* a set of typecasters for string types */
PyObject *binary_types; /* a set of typecasters for binary types */
} cursorObject;
/* C-callable functions in cursor_int.c and cursor_ext.c */
HIDDEN void curs_reset(cursorObject *self);
/* exception-raising macros */
#define EXC_IF_CURS_CLOSED(self) \
if ((self)->closed || ((self)->conn && (self)->conn->closed)) { \
PyErr_SetString(InterfaceError, "cursor already closed"); \
return NULL; }
#define EXC_IF_NO_TUPLES(self) \
if ((self)->notuples && (self)->name == NULL) { \
PyErr_SetString(ProgrammingError, "no results to fetch"); \
return NULL; }
#define EXC_IF_NO_MARK(self) \
if ((self)->mark != (self)->conn->mark) { \
PyErr_SetString(ProgrammingError, "named cursor isn't valid anymore"); \
return NULL; }
#ifdef __cplusplus
}
#endif
#endif /* !defined(PSYCOPG_CURSOR_H) */
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