mirror of
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85a12a8beb
fails, don't consume the row (restore it) and fail immediatly (don't call pysqlite_step())
1103 lines
34 KiB
C
1103 lines
34 KiB
C
/* cursor.c - the cursor type
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*
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* Copyright (C) 2004-2010 Gerhard Häring <gh@ghaering.de>
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*
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* This file is part of pysqlite.
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*
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* This software is provided 'as-is', without any express or implied
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* warranty. In no event will the authors be held liable for any damages
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* arising from the use of this software.
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*
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* Permission is granted to anyone to use this software for any purpose,
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* including commercial applications, and to alter it and redistribute it
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* freely, subject to the following restrictions:
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*
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* 1. The origin of this software must not be misrepresented; you must not
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* claim that you wrote the original software. If you use this software
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* in a product, an acknowledgment in the product documentation would be
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* appreciated but is not required.
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* 2. Altered source versions must be plainly marked as such, and must not be
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* misrepresented as being the original software.
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* 3. This notice may not be removed or altered from any source distribution.
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*/
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#include "cursor.h"
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#include "module.h"
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#include "util.h"
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PyObject* pysqlite_cursor_iternext(pysqlite_Cursor* self);
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static char* errmsg_fetch_across_rollback = "Cursor needed to be reset because of commit/rollback and can no longer be fetched from.";
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static pysqlite_StatementKind detect_statement_type(const char* statement)
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{
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char buf[20];
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const char* src;
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char* dst;
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src = statement;
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/* skip over whitepace */
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while (*src == '\r' || *src == '\n' || *src == ' ' || *src == '\t') {
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src++;
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}
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if (*src == 0)
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return STATEMENT_INVALID;
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dst = buf;
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*dst = 0;
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while (Py_ISALPHA(*src) && dst - buf < sizeof(buf) - 2) {
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*dst++ = Py_TOLOWER(*src++);
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}
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*dst = 0;
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if (!strcmp(buf, "select")) {
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return STATEMENT_SELECT;
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} else if (!strcmp(buf, "insert")) {
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return STATEMENT_INSERT;
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} else if (!strcmp(buf, "update")) {
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return STATEMENT_UPDATE;
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} else if (!strcmp(buf, "delete")) {
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return STATEMENT_DELETE;
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} else if (!strcmp(buf, "replace")) {
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return STATEMENT_REPLACE;
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} else {
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return STATEMENT_OTHER;
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}
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}
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static int pysqlite_cursor_init(pysqlite_Cursor* self, PyObject* args, PyObject* kwargs)
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{
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pysqlite_Connection* connection;
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if (!PyArg_ParseTuple(args, "O!", &pysqlite_ConnectionType, &connection))
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{
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return -1;
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}
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Py_INCREF(connection);
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self->connection = connection;
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self->statement = NULL;
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self->next_row = NULL;
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self->in_weakreflist = NULL;
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self->row_cast_map = PyList_New(0);
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if (!self->row_cast_map) {
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return -1;
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}
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Py_INCREF(Py_None);
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self->description = Py_None;
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Py_INCREF(Py_None);
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self->lastrowid= Py_None;
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self->arraysize = 1;
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self->closed = 0;
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self->reset = 0;
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self->rowcount = -1L;
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Py_INCREF(Py_None);
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self->row_factory = Py_None;
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if (!pysqlite_check_thread(self->connection)) {
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return -1;
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}
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if (!pysqlite_connection_register_cursor(connection, (PyObject*)self)) {
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return -1;
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}
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self->initialized = 1;
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return 0;
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}
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static void pysqlite_cursor_dealloc(pysqlite_Cursor* self)
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{
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/* Reset the statement if the user has not closed the cursor */
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if (self->statement) {
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pysqlite_statement_reset(self->statement);
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Py_DECREF(self->statement);
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}
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Py_XDECREF(self->connection);
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Py_XDECREF(self->row_cast_map);
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Py_XDECREF(self->description);
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Py_XDECREF(self->lastrowid);
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Py_XDECREF(self->row_factory);
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Py_XDECREF(self->next_row);
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if (self->in_weakreflist != NULL) {
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PyObject_ClearWeakRefs((PyObject*)self);
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}
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Py_TYPE(self)->tp_free((PyObject*)self);
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}
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PyObject* _pysqlite_get_converter(PyObject* key)
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{
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PyObject* upcase_key;
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PyObject* retval;
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_Py_IDENTIFIER(upper);
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upcase_key = _PyObject_CallMethodId(key, &PyId_upper, "");
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if (!upcase_key) {
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return NULL;
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}
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retval = PyDict_GetItem(converters, upcase_key);
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Py_DECREF(upcase_key);
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return retval;
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}
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int pysqlite_build_row_cast_map(pysqlite_Cursor* self)
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{
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int i;
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const char* type_start = (const char*)-1;
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const char* pos;
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const char* colname;
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const char* decltype;
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PyObject* py_decltype;
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PyObject* converter;
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PyObject* key;
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if (!self->connection->detect_types) {
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return 0;
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}
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Py_XDECREF(self->row_cast_map);
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self->row_cast_map = PyList_New(0);
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for (i = 0; i < sqlite3_column_count(self->statement->st); i++) {
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converter = NULL;
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if (self->connection->detect_types & PARSE_COLNAMES) {
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colname = sqlite3_column_name(self->statement->st, i);
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if (colname) {
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for (pos = colname; *pos != 0; pos++) {
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if (*pos == '[') {
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type_start = pos + 1;
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} else if (*pos == ']' && type_start != (const char*)-1) {
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key = PyUnicode_FromStringAndSize(type_start, pos - type_start);
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if (!key) {
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/* creating a string failed, but it is too complicated
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* to propagate the error here, we just assume there is
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* no converter and proceed */
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break;
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}
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converter = _pysqlite_get_converter(key);
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Py_DECREF(key);
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break;
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}
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}
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}
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}
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if (!converter && self->connection->detect_types & PARSE_DECLTYPES) {
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decltype = sqlite3_column_decltype(self->statement->st, i);
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if (decltype) {
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for (pos = decltype;;pos++) {
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/* Converter names are split at '(' and blanks.
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* This allows 'INTEGER NOT NULL' to be treated as 'INTEGER' and
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* 'NUMBER(10)' to be treated as 'NUMBER', for example.
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* In other words, it will work as people expect it to work.*/
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if (*pos == ' ' || *pos == '(' || *pos == 0) {
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py_decltype = PyUnicode_FromStringAndSize(decltype, pos - decltype);
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if (!py_decltype) {
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return -1;
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}
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break;
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}
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}
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converter = _pysqlite_get_converter(py_decltype);
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Py_DECREF(py_decltype);
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}
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}
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if (!converter) {
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converter = Py_None;
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}
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if (PyList_Append(self->row_cast_map, converter) != 0) {
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if (converter != Py_None) {
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Py_DECREF(converter);
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}
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Py_XDECREF(self->row_cast_map);
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self->row_cast_map = NULL;
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return -1;
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}
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}
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return 0;
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}
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PyObject* _pysqlite_build_column_name(const char* colname)
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{
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const char* pos;
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if (!colname) {
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Py_INCREF(Py_None);
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return Py_None;
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}
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for (pos = colname;; pos++) {
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if (*pos == 0 || *pos == '[') {
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if ((*pos == '[') && (pos > colname) && (*(pos-1) == ' ')) {
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pos--;
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}
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return PyUnicode_FromStringAndSize(colname, pos - colname);
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}
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}
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}
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/*
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* Returns a row from the currently active SQLite statement
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*
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* Precondidition:
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* - sqlite3_step() has been called before and it returned SQLITE_ROW.
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*/
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PyObject* _pysqlite_fetch_one_row(pysqlite_Cursor* self)
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{
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int i, numcols;
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PyObject* row;
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PyObject* item = NULL;
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int coltype;
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PyObject* converter;
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PyObject* converted;
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Py_ssize_t nbytes;
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PyObject* buffer;
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const char* val_str;
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char buf[200];
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const char* colname;
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PyObject* buf_bytes;
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PyObject* error_obj;
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if (self->reset) {
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PyErr_SetString(pysqlite_InterfaceError, errmsg_fetch_across_rollback);
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return NULL;
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}
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Py_BEGIN_ALLOW_THREADS
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numcols = sqlite3_data_count(self->statement->st);
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Py_END_ALLOW_THREADS
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row = PyTuple_New(numcols);
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if (!row) {
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return NULL;
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}
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for (i = 0; i < numcols; i++) {
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if (self->connection->detect_types) {
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converter = PyList_GetItem(self->row_cast_map, i);
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if (!converter) {
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converter = Py_None;
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}
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} else {
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converter = Py_None;
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}
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if (converter != Py_None) {
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nbytes = sqlite3_column_bytes(self->statement->st, i);
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val_str = (const char*)sqlite3_column_blob(self->statement->st, i);
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if (!val_str) {
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Py_INCREF(Py_None);
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converted = Py_None;
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} else {
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item = PyBytes_FromStringAndSize(val_str, nbytes);
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if (!item) {
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return NULL;
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}
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converted = PyObject_CallFunction(converter, "O", item);
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Py_DECREF(item);
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if (!converted) {
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break;
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}
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}
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} else {
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Py_BEGIN_ALLOW_THREADS
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coltype = sqlite3_column_type(self->statement->st, i);
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Py_END_ALLOW_THREADS
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if (coltype == SQLITE_NULL) {
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Py_INCREF(Py_None);
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converted = Py_None;
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} else if (coltype == SQLITE_INTEGER) {
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converted = _pysqlite_long_from_int64(sqlite3_column_int64(self->statement->st, i));
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} else if (coltype == SQLITE_FLOAT) {
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converted = PyFloat_FromDouble(sqlite3_column_double(self->statement->st, i));
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} else if (coltype == SQLITE_TEXT) {
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val_str = (const char*)sqlite3_column_text(self->statement->st, i);
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nbytes = sqlite3_column_bytes(self->statement->st, i);
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if (self->connection->text_factory == (PyObject*)&PyUnicode_Type) {
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converted = PyUnicode_FromStringAndSize(val_str, nbytes);
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if (!converted) {
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#ifdef Py_DEBUG
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/* in debug mode, type_call() fails with an assertion
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error if an exception is set when it is called */
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PyErr_Clear();
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#endif
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colname = sqlite3_column_name(self->statement->st, i);
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if (!colname) {
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colname = "<unknown column name>";
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}
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PyOS_snprintf(buf, sizeof(buf) - 1, "Could not decode to UTF-8 column '%s' with text '%s'",
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colname , val_str);
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buf_bytes = PyByteArray_FromStringAndSize(buf, strlen(buf));
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if (!buf_bytes) {
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PyErr_SetString(pysqlite_OperationalError, "Could not decode to UTF-8");
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} else {
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error_obj = PyUnicode_FromEncodedObject(buf_bytes, "ascii", "replace");
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if (!error_obj) {
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PyErr_SetString(pysqlite_OperationalError, "Could not decode to UTF-8");
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} else {
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PyErr_SetObject(pysqlite_OperationalError, error_obj);
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Py_DECREF(error_obj);
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}
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Py_DECREF(buf_bytes);
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}
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}
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} else if (self->connection->text_factory == (PyObject*)&PyBytes_Type) {
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converted = PyBytes_FromStringAndSize(val_str, nbytes);
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} else if (self->connection->text_factory == (PyObject*)&PyByteArray_Type) {
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converted = PyByteArray_FromStringAndSize(val_str, nbytes);
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} else {
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converted = PyObject_CallFunction(self->connection->text_factory, "y#", val_str, nbytes);
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}
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} else {
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/* coltype == SQLITE_BLOB */
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nbytes = sqlite3_column_bytes(self->statement->st, i);
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buffer = PyBytes_FromStringAndSize(
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sqlite3_column_blob(self->statement->st, i), nbytes);
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if (!buffer) {
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break;
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}
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converted = buffer;
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}
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}
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if (converted) {
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PyTuple_SetItem(row, i, converted);
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} else {
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Py_INCREF(Py_None);
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PyTuple_SetItem(row, i, Py_None);
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}
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}
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if (PyErr_Occurred()) {
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Py_DECREF(row);
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row = NULL;
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}
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return row;
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}
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/*
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* Checks if a cursor object is usable.
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*
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* 0 => error; 1 => ok
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*/
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static int check_cursor(pysqlite_Cursor* cur)
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{
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if (!cur->initialized) {
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PyErr_SetString(pysqlite_ProgrammingError, "Base Cursor.__init__ not called.");
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return 0;
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}
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if (cur->closed) {
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PyErr_SetString(pysqlite_ProgrammingError, "Cannot operate on a closed cursor.");
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return 0;
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}
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if (cur->locked) {
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PyErr_SetString(pysqlite_ProgrammingError, "Recursive use of cursors not allowed.");
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return 0;
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}
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return pysqlite_check_thread(cur->connection) && pysqlite_check_connection(cur->connection);
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}
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PyObject* _pysqlite_query_execute(pysqlite_Cursor* self, int multiple, PyObject* args)
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{
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PyObject* operation;
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const char* operation_cstr;
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Py_ssize_t operation_len;
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PyObject* parameters_list = NULL;
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PyObject* parameters_iter = NULL;
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PyObject* parameters = NULL;
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int i;
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int rc;
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PyObject* func_args;
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PyObject* result;
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int numcols;
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int statement_type;
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PyObject* descriptor;
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PyObject* second_argument = NULL;
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if (!check_cursor(self)) {
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goto error;
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}
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self->locked = 1;
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self->reset = 0;
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Py_XDECREF(self->next_row);
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self->next_row = NULL;
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if (multiple) {
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/* executemany() */
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if (!PyArg_ParseTuple(args, "OO", &operation, &second_argument)) {
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goto error;
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}
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if (!PyUnicode_Check(operation)) {
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PyErr_SetString(PyExc_ValueError, "operation parameter must be str");
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goto error;
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}
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if (PyIter_Check(second_argument)) {
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/* iterator */
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Py_INCREF(second_argument);
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parameters_iter = second_argument;
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} else {
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/* sequence */
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parameters_iter = PyObject_GetIter(second_argument);
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if (!parameters_iter) {
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goto error;
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}
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}
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} else {
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/* execute() */
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if (!PyArg_ParseTuple(args, "O|O", &operation, &second_argument)) {
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goto error;
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}
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if (!PyUnicode_Check(operation)) {
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PyErr_SetString(PyExc_ValueError, "operation parameter must be str");
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goto error;
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}
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parameters_list = PyList_New(0);
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if (!parameters_list) {
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goto error;
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}
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if (second_argument == NULL) {
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second_argument = PyTuple_New(0);
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if (!second_argument) {
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goto error;
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}
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} else {
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Py_INCREF(second_argument);
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}
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if (PyList_Append(parameters_list, second_argument) != 0) {
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Py_DECREF(second_argument);
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goto error;
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}
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Py_DECREF(second_argument);
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parameters_iter = PyObject_GetIter(parameters_list);
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if (!parameters_iter) {
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goto error;
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}
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}
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if (self->statement != NULL) {
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/* There is an active statement */
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pysqlite_statement_reset(self->statement);
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}
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operation_cstr = _PyUnicode_AsStringAndSize(operation, &operation_len);
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if (operation_cstr == NULL)
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goto error;
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/* reset description and rowcount */
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Py_DECREF(self->description);
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Py_INCREF(Py_None);
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self->description = Py_None;
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self->rowcount = -1L;
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func_args = PyTuple_New(1);
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if (!func_args) {
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goto error;
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}
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Py_INCREF(operation);
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if (PyTuple_SetItem(func_args, 0, operation) != 0) {
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goto error;
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}
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if (self->statement) {
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(void)pysqlite_statement_reset(self->statement);
|
|
Py_DECREF(self->statement);
|
|
}
|
|
|
|
self->statement = (pysqlite_Statement*)pysqlite_cache_get(self->connection->statement_cache, func_args);
|
|
Py_DECREF(func_args);
|
|
|
|
if (!self->statement) {
|
|
goto error;
|
|
}
|
|
|
|
if (self->statement->in_use) {
|
|
Py_DECREF(self->statement);
|
|
self->statement = PyObject_New(pysqlite_Statement, &pysqlite_StatementType);
|
|
if (!self->statement) {
|
|
goto error;
|
|
}
|
|
rc = pysqlite_statement_create(self->statement, self->connection, operation);
|
|
if (rc != SQLITE_OK) {
|
|
Py_CLEAR(self->statement);
|
|
goto error;
|
|
}
|
|
}
|
|
|
|
pysqlite_statement_reset(self->statement);
|
|
pysqlite_statement_mark_dirty(self->statement);
|
|
|
|
statement_type = detect_statement_type(operation_cstr);
|
|
if (self->connection->begin_statement) {
|
|
switch (statement_type) {
|
|
case STATEMENT_UPDATE:
|
|
case STATEMENT_DELETE:
|
|
case STATEMENT_INSERT:
|
|
case STATEMENT_REPLACE:
|
|
if (!self->connection->inTransaction) {
|
|
result = _pysqlite_connection_begin(self->connection);
|
|
if (!result) {
|
|
goto error;
|
|
}
|
|
Py_DECREF(result);
|
|
}
|
|
break;
|
|
case STATEMENT_OTHER:
|
|
/* it's a DDL statement or something similar
|
|
- we better COMMIT first so it works for all cases */
|
|
if (self->connection->inTransaction) {
|
|
result = pysqlite_connection_commit(self->connection, NULL);
|
|
if (!result) {
|
|
goto error;
|
|
}
|
|
Py_DECREF(result);
|
|
}
|
|
break;
|
|
case STATEMENT_SELECT:
|
|
if (multiple) {
|
|
PyErr_SetString(pysqlite_ProgrammingError,
|
|
"You cannot execute SELECT statements in executemany().");
|
|
goto error;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
|
|
while (1) {
|
|
parameters = PyIter_Next(parameters_iter);
|
|
if (!parameters) {
|
|
break;
|
|
}
|
|
|
|
pysqlite_statement_mark_dirty(self->statement);
|
|
|
|
pysqlite_statement_bind_parameters(self->statement, parameters);
|
|
if (PyErr_Occurred()) {
|
|
goto error;
|
|
}
|
|
|
|
/* Keep trying the SQL statement until the schema stops changing. */
|
|
while (1) {
|
|
/* Actually execute the SQL statement. */
|
|
rc = pysqlite_step(self->statement->st, self->connection);
|
|
if (rc == SQLITE_DONE || rc == SQLITE_ROW) {
|
|
/* If it worked, let's get out of the loop */
|
|
break;
|
|
}
|
|
/* Something went wrong. Re-set the statement and try again. */
|
|
rc = pysqlite_statement_reset(self->statement);
|
|
if (rc == SQLITE_SCHEMA) {
|
|
/* If this was a result of the schema changing, let's try
|
|
again. */
|
|
rc = pysqlite_statement_recompile(self->statement, parameters);
|
|
if (rc == SQLITE_OK) {
|
|
continue;
|
|
} else {
|
|
/* If the database gave us an error, promote it to Python. */
|
|
(void)pysqlite_statement_reset(self->statement);
|
|
_pysqlite_seterror(self->connection->db, NULL);
|
|
goto error;
|
|
}
|
|
} else {
|
|
if (PyErr_Occurred()) {
|
|
/* there was an error that occurred in a user-defined callback */
|
|
if (_enable_callback_tracebacks) {
|
|
PyErr_Print();
|
|
} else {
|
|
PyErr_Clear();
|
|
}
|
|
}
|
|
(void)pysqlite_statement_reset(self->statement);
|
|
_pysqlite_seterror(self->connection->db, NULL);
|
|
goto error;
|
|
}
|
|
}
|
|
|
|
if (pysqlite_build_row_cast_map(self) != 0) {
|
|
PyErr_SetString(pysqlite_OperationalError, "Error while building row_cast_map");
|
|
goto error;
|
|
}
|
|
|
|
if (rc == SQLITE_ROW || (rc == SQLITE_DONE && statement_type == STATEMENT_SELECT)) {
|
|
if (self->description == Py_None) {
|
|
Py_BEGIN_ALLOW_THREADS
|
|
numcols = sqlite3_column_count(self->statement->st);
|
|
Py_END_ALLOW_THREADS
|
|
|
|
Py_DECREF(self->description);
|
|
self->description = PyTuple_New(numcols);
|
|
if (!self->description) {
|
|
goto error;
|
|
}
|
|
for (i = 0; i < numcols; i++) {
|
|
descriptor = PyTuple_New(7);
|
|
if (!descriptor) {
|
|
goto error;
|
|
}
|
|
PyTuple_SetItem(descriptor, 0, _pysqlite_build_column_name(sqlite3_column_name(self->statement->st, i)));
|
|
Py_INCREF(Py_None); PyTuple_SetItem(descriptor, 1, Py_None);
|
|
Py_INCREF(Py_None); PyTuple_SetItem(descriptor, 2, Py_None);
|
|
Py_INCREF(Py_None); PyTuple_SetItem(descriptor, 3, Py_None);
|
|
Py_INCREF(Py_None); PyTuple_SetItem(descriptor, 4, Py_None);
|
|
Py_INCREF(Py_None); PyTuple_SetItem(descriptor, 5, Py_None);
|
|
Py_INCREF(Py_None); PyTuple_SetItem(descriptor, 6, Py_None);
|
|
PyTuple_SetItem(self->description, i, descriptor);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (rc == SQLITE_ROW) {
|
|
if (multiple) {
|
|
PyErr_SetString(pysqlite_ProgrammingError, "executemany() can only execute DML statements.");
|
|
goto error;
|
|
}
|
|
|
|
self->next_row = _pysqlite_fetch_one_row(self);
|
|
} else if (rc == SQLITE_DONE && !multiple) {
|
|
pysqlite_statement_reset(self->statement);
|
|
Py_CLEAR(self->statement);
|
|
}
|
|
|
|
switch (statement_type) {
|
|
case STATEMENT_UPDATE:
|
|
case STATEMENT_DELETE:
|
|
case STATEMENT_INSERT:
|
|
case STATEMENT_REPLACE:
|
|
if (self->rowcount == -1L) {
|
|
self->rowcount = 0L;
|
|
}
|
|
self->rowcount += (long)sqlite3_changes(self->connection->db);
|
|
}
|
|
|
|
Py_DECREF(self->lastrowid);
|
|
if (!multiple && statement_type == STATEMENT_INSERT) {
|
|
sqlite_int64 lastrowid;
|
|
Py_BEGIN_ALLOW_THREADS
|
|
lastrowid = sqlite3_last_insert_rowid(self->connection->db);
|
|
Py_END_ALLOW_THREADS
|
|
self->lastrowid = _pysqlite_long_from_int64(lastrowid);
|
|
} else {
|
|
Py_INCREF(Py_None);
|
|
self->lastrowid = Py_None;
|
|
}
|
|
|
|
if (multiple) {
|
|
pysqlite_statement_reset(self->statement);
|
|
}
|
|
Py_XDECREF(parameters);
|
|
}
|
|
|
|
error:
|
|
/* just to be sure (implicit ROLLBACKs with ON CONFLICT ROLLBACK/OR
|
|
* ROLLBACK could have happened */
|
|
#ifdef SQLITE_VERSION_NUMBER
|
|
#if SQLITE_VERSION_NUMBER >= 3002002
|
|
if (self->connection && self->connection->db)
|
|
self->connection->inTransaction = !sqlite3_get_autocommit(self->connection->db);
|
|
#endif
|
|
#endif
|
|
|
|
Py_XDECREF(parameters);
|
|
Py_XDECREF(parameters_iter);
|
|
Py_XDECREF(parameters_list);
|
|
|
|
self->locked = 0;
|
|
|
|
if (PyErr_Occurred()) {
|
|
self->rowcount = -1L;
|
|
return NULL;
|
|
} else {
|
|
Py_INCREF(self);
|
|
return (PyObject*)self;
|
|
}
|
|
}
|
|
|
|
PyObject* pysqlite_cursor_execute(pysqlite_Cursor* self, PyObject* args)
|
|
{
|
|
return _pysqlite_query_execute(self, 0, args);
|
|
}
|
|
|
|
PyObject* pysqlite_cursor_executemany(pysqlite_Cursor* self, PyObject* args)
|
|
{
|
|
return _pysqlite_query_execute(self, 1, args);
|
|
}
|
|
|
|
PyObject* pysqlite_cursor_executescript(pysqlite_Cursor* self, PyObject* args)
|
|
{
|
|
PyObject* script_obj;
|
|
PyObject* script_str = NULL;
|
|
const char* script_cstr;
|
|
sqlite3_stmt* statement;
|
|
int rc;
|
|
PyObject* result;
|
|
|
|
if (!PyArg_ParseTuple(args, "O", &script_obj)) {
|
|
return NULL;
|
|
}
|
|
|
|
if (!check_cursor(self)) {
|
|
return NULL;
|
|
}
|
|
|
|
self->reset = 0;
|
|
|
|
if (PyUnicode_Check(script_obj)) {
|
|
script_cstr = _PyUnicode_AsString(script_obj);
|
|
if (!script_cstr) {
|
|
return NULL;
|
|
}
|
|
} else {
|
|
PyErr_SetString(PyExc_ValueError, "script argument must be unicode.");
|
|
return NULL;
|
|
}
|
|
|
|
/* commit first */
|
|
result = pysqlite_connection_commit(self->connection, NULL);
|
|
if (!result) {
|
|
goto error;
|
|
}
|
|
Py_DECREF(result);
|
|
|
|
while (1) {
|
|
Py_BEGIN_ALLOW_THREADS
|
|
rc = sqlite3_prepare(self->connection->db,
|
|
script_cstr,
|
|
-1,
|
|
&statement,
|
|
&script_cstr);
|
|
Py_END_ALLOW_THREADS
|
|
if (rc != SQLITE_OK) {
|
|
_pysqlite_seterror(self->connection->db, NULL);
|
|
goto error;
|
|
}
|
|
|
|
/* execute statement, and ignore results of SELECT statements */
|
|
rc = SQLITE_ROW;
|
|
while (rc == SQLITE_ROW) {
|
|
rc = pysqlite_step(statement, self->connection);
|
|
/* TODO: we probably need more error handling here */
|
|
}
|
|
|
|
if (rc != SQLITE_DONE) {
|
|
(void)sqlite3_finalize(statement);
|
|
_pysqlite_seterror(self->connection->db, NULL);
|
|
goto error;
|
|
}
|
|
|
|
rc = sqlite3_finalize(statement);
|
|
if (rc != SQLITE_OK) {
|
|
_pysqlite_seterror(self->connection->db, NULL);
|
|
goto error;
|
|
}
|
|
|
|
if (*script_cstr == (char)0) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
error:
|
|
Py_XDECREF(script_str);
|
|
|
|
if (PyErr_Occurred()) {
|
|
return NULL;
|
|
} else {
|
|
Py_INCREF(self);
|
|
return (PyObject*)self;
|
|
}
|
|
}
|
|
|
|
PyObject* pysqlite_cursor_getiter(pysqlite_Cursor *self)
|
|
{
|
|
Py_INCREF(self);
|
|
return (PyObject*)self;
|
|
}
|
|
|
|
PyObject* pysqlite_cursor_iternext(pysqlite_Cursor *self)
|
|
{
|
|
PyObject* next_row_tuple;
|
|
PyObject* next_row;
|
|
int rc;
|
|
|
|
if (!check_cursor(self)) {
|
|
return NULL;
|
|
}
|
|
|
|
if (self->reset) {
|
|
PyErr_SetString(pysqlite_InterfaceError, errmsg_fetch_across_rollback);
|
|
return NULL;
|
|
}
|
|
|
|
if (!self->next_row) {
|
|
if (self->statement) {
|
|
(void)pysqlite_statement_reset(self->statement);
|
|
Py_DECREF(self->statement);
|
|
self->statement = NULL;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
next_row_tuple = self->next_row;
|
|
assert(next_row_tuple != NULL);
|
|
self->next_row = NULL;
|
|
|
|
if (self->row_factory != Py_None) {
|
|
next_row = PyObject_CallFunction(self->row_factory, "OO", self, next_row_tuple);
|
|
if (next_row == NULL) {
|
|
self->next_row = next_row_tuple;
|
|
return NULL;
|
|
}
|
|
Py_DECREF(next_row_tuple);
|
|
} else {
|
|
next_row = next_row_tuple;
|
|
}
|
|
|
|
if (self->statement) {
|
|
rc = pysqlite_step(self->statement->st, self->connection);
|
|
if (rc != SQLITE_DONE && rc != SQLITE_ROW) {
|
|
(void)pysqlite_statement_reset(self->statement);
|
|
Py_DECREF(next_row);
|
|
_pysqlite_seterror(self->connection->db, NULL);
|
|
return NULL;
|
|
}
|
|
|
|
if (rc == SQLITE_ROW) {
|
|
self->next_row = _pysqlite_fetch_one_row(self);
|
|
if (self->next_row == NULL) {
|
|
(void)pysqlite_statement_reset(self->statement);
|
|
Py_DECREF(next_row);
|
|
_pysqlite_seterror(self->connection->db, NULL);
|
|
return NULL;
|
|
}
|
|
}
|
|
}
|
|
|
|
return next_row;
|
|
}
|
|
|
|
PyObject* pysqlite_cursor_fetchone(pysqlite_Cursor* self, PyObject* args)
|
|
{
|
|
PyObject* row;
|
|
|
|
row = pysqlite_cursor_iternext(self);
|
|
if (!row && !PyErr_Occurred()) {
|
|
Py_INCREF(Py_None);
|
|
return Py_None;
|
|
}
|
|
|
|
return row;
|
|
}
|
|
|
|
PyObject* pysqlite_cursor_fetchmany(pysqlite_Cursor* self, PyObject* args, PyObject* kwargs)
|
|
{
|
|
static char *kwlist[] = {"size", NULL, NULL};
|
|
|
|
PyObject* row;
|
|
PyObject* list;
|
|
int maxrows = self->arraysize;
|
|
int counter = 0;
|
|
|
|
if (!PyArg_ParseTupleAndKeywords(args, kwargs, "|i:fetchmany", kwlist, &maxrows)) {
|
|
return NULL;
|
|
}
|
|
|
|
list = PyList_New(0);
|
|
if (!list) {
|
|
return NULL;
|
|
}
|
|
|
|
/* just make sure we enter the loop */
|
|
row = Py_None;
|
|
|
|
while (row) {
|
|
row = pysqlite_cursor_iternext(self);
|
|
if (row) {
|
|
PyList_Append(list, row);
|
|
Py_DECREF(row);
|
|
} else {
|
|
break;
|
|
}
|
|
|
|
if (++counter == maxrows) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (PyErr_Occurred()) {
|
|
Py_DECREF(list);
|
|
return NULL;
|
|
} else {
|
|
return list;
|
|
}
|
|
}
|
|
|
|
PyObject* pysqlite_cursor_fetchall(pysqlite_Cursor* self, PyObject* args)
|
|
{
|
|
PyObject* row;
|
|
PyObject* list;
|
|
|
|
list = PyList_New(0);
|
|
if (!list) {
|
|
return NULL;
|
|
}
|
|
|
|
/* just make sure we enter the loop */
|
|
row = (PyObject*)Py_None;
|
|
|
|
while (row) {
|
|
row = pysqlite_cursor_iternext(self);
|
|
if (row) {
|
|
PyList_Append(list, row);
|
|
Py_DECREF(row);
|
|
}
|
|
}
|
|
|
|
if (PyErr_Occurred()) {
|
|
Py_DECREF(list);
|
|
return NULL;
|
|
} else {
|
|
return list;
|
|
}
|
|
}
|
|
|
|
PyObject* pysqlite_noop(pysqlite_Connection* self, PyObject* args)
|
|
{
|
|
/* don't care, return None */
|
|
Py_INCREF(Py_None);
|
|
return Py_None;
|
|
}
|
|
|
|
PyObject* pysqlite_cursor_close(pysqlite_Cursor* self, PyObject* args)
|
|
{
|
|
if (!pysqlite_check_thread(self->connection) || !pysqlite_check_connection(self->connection)) {
|
|
return NULL;
|
|
}
|
|
|
|
if (self->statement) {
|
|
(void)pysqlite_statement_reset(self->statement);
|
|
Py_CLEAR(self->statement);
|
|
}
|
|
|
|
self->closed = 1;
|
|
|
|
Py_INCREF(Py_None);
|
|
return Py_None;
|
|
}
|
|
|
|
static PyMethodDef cursor_methods[] = {
|
|
{"execute", (PyCFunction)pysqlite_cursor_execute, METH_VARARGS,
|
|
PyDoc_STR("Executes a SQL statement.")},
|
|
{"executemany", (PyCFunction)pysqlite_cursor_executemany, METH_VARARGS,
|
|
PyDoc_STR("Repeatedly executes a SQL statement.")},
|
|
{"executescript", (PyCFunction)pysqlite_cursor_executescript, METH_VARARGS,
|
|
PyDoc_STR("Executes a multiple SQL statements at once. Non-standard.")},
|
|
{"fetchone", (PyCFunction)pysqlite_cursor_fetchone, METH_NOARGS,
|
|
PyDoc_STR("Fetches one row from the resultset.")},
|
|
{"fetchmany", (PyCFunction)pysqlite_cursor_fetchmany, METH_VARARGS|METH_KEYWORDS,
|
|
PyDoc_STR("Fetches several rows from the resultset.")},
|
|
{"fetchall", (PyCFunction)pysqlite_cursor_fetchall, METH_NOARGS,
|
|
PyDoc_STR("Fetches all rows from the resultset.")},
|
|
{"close", (PyCFunction)pysqlite_cursor_close, METH_NOARGS,
|
|
PyDoc_STR("Closes the cursor.")},
|
|
{"setinputsizes", (PyCFunction)pysqlite_noop, METH_VARARGS,
|
|
PyDoc_STR("Required by DB-API. Does nothing in pysqlite.")},
|
|
{"setoutputsize", (PyCFunction)pysqlite_noop, METH_VARARGS,
|
|
PyDoc_STR("Required by DB-API. Does nothing in pysqlite.")},
|
|
{NULL, NULL}
|
|
};
|
|
|
|
static struct PyMemberDef cursor_members[] =
|
|
{
|
|
{"connection", T_OBJECT, offsetof(pysqlite_Cursor, connection), READONLY},
|
|
{"description", T_OBJECT, offsetof(pysqlite_Cursor, description), READONLY},
|
|
{"arraysize", T_INT, offsetof(pysqlite_Cursor, arraysize), 0},
|
|
{"lastrowid", T_OBJECT, offsetof(pysqlite_Cursor, lastrowid), READONLY},
|
|
{"rowcount", T_LONG, offsetof(pysqlite_Cursor, rowcount), READONLY},
|
|
{"row_factory", T_OBJECT, offsetof(pysqlite_Cursor, row_factory), 0},
|
|
{NULL}
|
|
};
|
|
|
|
static char cursor_doc[] =
|
|
PyDoc_STR("SQLite database cursor class.");
|
|
|
|
PyTypeObject pysqlite_CursorType = {
|
|
PyVarObject_HEAD_INIT(NULL, 0)
|
|
MODULE_NAME ".Cursor", /* tp_name */
|
|
sizeof(pysqlite_Cursor), /* tp_basicsize */
|
|
0, /* tp_itemsize */
|
|
(destructor)pysqlite_cursor_dealloc, /* tp_dealloc */
|
|
0, /* tp_print */
|
|
0, /* tp_getattr */
|
|
0, /* tp_setattr */
|
|
0, /* tp_reserved */
|
|
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, /* tp_flags */
|
|
cursor_doc, /* tp_doc */
|
|
0, /* tp_traverse */
|
|
0, /* tp_clear */
|
|
0, /* tp_richcompare */
|
|
offsetof(pysqlite_Cursor, in_weakreflist), /* tp_weaklistoffset */
|
|
(getiterfunc)pysqlite_cursor_getiter, /* tp_iter */
|
|
(iternextfunc)pysqlite_cursor_iternext, /* tp_iternext */
|
|
cursor_methods, /* tp_methods */
|
|
cursor_members, /* tp_members */
|
|
0, /* tp_getset */
|
|
0, /* tp_base */
|
|
0, /* tp_dict */
|
|
0, /* tp_descr_get */
|
|
0, /* tp_descr_set */
|
|
0, /* tp_dictoffset */
|
|
(initproc)pysqlite_cursor_init, /* tp_init */
|
|
0, /* tp_alloc */
|
|
0, /* tp_new */
|
|
0 /* tp_free */
|
|
};
|
|
|
|
extern int pysqlite_cursor_setup_types(void)
|
|
{
|
|
pysqlite_CursorType.tp_new = PyType_GenericNew;
|
|
return PyType_Ready(&pysqlite_CursorType);
|
|
}
|