Mercurial > cpython-lru_cache-weakref

annotate Modules/_sqlite/statement.c @ 51271:87fbbf22adf3 3.0

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Merged revisions 69214 via svnmerge from svn+ssh://pythondev@svn.python.org/python/branches/py3k ........ r69214 | mark.dickinson | 2009-02-02 20:36:42 +0000 (Mon, 02 Feb 2009) | 4 lines Issue #1717: rename tp_compare to tp_reserved. I'll change the type of tp_compare in a separate commit, for ease of reversion should things go wrong. ........
author Mark Dickinson <dickinsm@gmail.com>
date Mon, 02 Feb 2009 20:41:29 +0000
parents 54613ba1dcad
children 3003c1656e2a
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 /* statement.c - the statement type
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2 *
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3 * Copyright (C) 2005-2007 Gerhard Häring <gh@ghaering.de>
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4 *
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5 * This file is part of pysqlite.
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6 *
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7 * This software is provided 'as-is', without any express or implied
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8 * warranty. In no event will the authors be held liable for any damages
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9 * arising from the use of this software.
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10 *
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11 * Permission is granted to anyone to use this software for any purpose,
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12 * including commercial applications, and to alter it and redistribute it
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13 * freely, subject to the following restrictions:
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14 *
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15 * 1. The origin of this software must not be misrepresented; you must not
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16 * claim that you wrote the original software. If you use this software
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17 * in a product, an acknowledgment in the product documentation would be
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18 * appreciated but is not required.
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19 * 2. Altered source versions must be plainly marked as such, and must not be
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20 * misrepresented as being the original software.
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21 * 3. This notice may not be removed or altered from any source distribution.
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22 */
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23
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24 #include "statement.h"
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25 #include "cursor.h"
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26 #include "connection.h"
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27 #include "microprotocols.h"
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28 #include "prepare_protocol.h"
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29 #include "sqlitecompat.h"
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30
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31 /* prototypes */
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32 static int pysqlite_check_remaining_sql(const char* tail);
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33
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34 typedef enum {
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35 LINECOMMENT_1,
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36 IN_LINECOMMENT,
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37 COMMENTSTART_1,
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38 IN_COMMENT,
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39 COMMENTEND_1,
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40 NORMAL
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41 } parse_remaining_sql_state;
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42
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43 typedef enum {
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44 TYPE_LONG,
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45 TYPE_FLOAT,
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46 TYPE_UNICODE,
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47 TYPE_BUFFER,
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48 TYPE_UNKNOWN
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49 } parameter_type;
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50
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51 int pysqlite_statement_create(pysqlite_Statement* self, pysqlite_Connection* connection, PyObject* sql)
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52 {
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53 const char* tail;
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54 int rc;
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55 const char* sql_cstr;
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56 Py_ssize_t sql_cstr_len;
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57
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58 self->st = NULL;
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59 self->in_use = 0;
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60
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61 sql_cstr = _PyUnicode_AsStringAndSize(sql, &sql_cstr_len);
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62 if (sql_cstr == NULL) {
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63 rc = PYSQLITE_SQL_WRONG_TYPE;
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64 return rc;
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65 }
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66
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67 self->in_weakreflist = NULL;
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68 Py_INCREF(sql);
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69 self->sql = sql;
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70
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71 Py_BEGIN_ALLOW_THREADS
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72 rc = sqlite3_prepare(connection->db,
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73 sql_cstr,
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74 -1,
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75 &self->st,
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76 &tail);
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77 Py_END_ALLOW_THREADS
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78
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79 self->db = connection->db;
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80
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81 if (rc == SQLITE_OK && pysqlite_check_remaining_sql(tail)) {
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82 (void)sqlite3_finalize(self->st);
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83 self->st = NULL;
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84 rc = PYSQLITE_TOO_MUCH_SQL;
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85 }
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86
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87 return rc;
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88 }
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89
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90 int pysqlite_statement_bind_parameter(pysqlite_Statement* self, int pos, PyObject* parameter, int allow_8bit_chars)
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91 {
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92 int rc = SQLITE_OK;
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93 PY_LONG_LONG longlongval;
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94 const char* buffer;
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95 char* string;
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96 Py_ssize_t buflen;
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97 parameter_type paramtype;
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98
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99 if (parameter == Py_None) {
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100 rc = sqlite3_bind_null(self->st, pos);
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101 goto final;
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102 }
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103
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104 if (PyLong_CheckExact(parameter)) {
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105 paramtype = TYPE_LONG;
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106 } else if (PyFloat_CheckExact(parameter)) {
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107 paramtype = TYPE_FLOAT;
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108 } else if (PyUnicode_CheckExact(parameter)) {
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109 paramtype = TYPE_UNICODE;
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110 } else if (PyLong_Check(parameter)) {
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111 paramtype = TYPE_LONG;
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112 } else if (PyFloat_Check(parameter)) {
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113 paramtype = TYPE_FLOAT;
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114 } else if (PyUnicode_Check(parameter)) {
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115 paramtype = TYPE_UNICODE;
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116 } else if (PyObject_CheckBuffer(parameter)) {
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117 paramtype = TYPE_BUFFER;
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118 } else {
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119 paramtype = TYPE_UNKNOWN;
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120 }
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121
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122 switch (paramtype) {
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123 case TYPE_LONG:
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124 /* in the overflow error case, longval/longlongval is -1, and an exception is set */
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125 longlongval = PyLong_AsLongLong(parameter);
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126 rc = sqlite3_bind_int64(self->st, pos, (sqlite_int64)longlongval);
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127 break;
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128 case TYPE_FLOAT:
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129 rc = sqlite3_bind_double(self->st, pos, PyFloat_AsDouble(parameter));
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130 break;
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131 case TYPE_UNICODE:
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85b67fb5672b Rename PyUnicode_AsString -> _PyUnicode_AsString and
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132 string = _PyUnicode_AsString(parameter);
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133 rc = sqlite3_bind_text(self->st, pos, string, -1, SQLITE_TRANSIENT);
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134 break;
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135 case TYPE_BUFFER:
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136 if (PyObject_AsCharBuffer(parameter, &buffer, &buflen) == 0) {
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137 rc = sqlite3_bind_blob(self->st, pos, buffer, buflen, SQLITE_TRANSIENT);
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138 } else {
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139 PyErr_SetString(PyExc_ValueError, "could not convert BLOB to buffer");
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140 rc = -1;
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141 }
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142 break;
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diff changeset
143 case TYPE_UNKNOWN:
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144 rc = -1;
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145 }
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diff changeset
146
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diff changeset
147 final:
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148 return rc;
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149 }
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150
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151 /* returns 0 if the object is one of Python's internal ones that don't need to be adapted */
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152 static int _need_adapt(PyObject* obj)
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153 {
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154 if (pysqlite_BaseTypeAdapted) {
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155 return 1;
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156 }
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157
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158 if (PyLong_CheckExact(obj) || PyFloat_CheckExact(obj)
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96b34263e448 Renamed PyBytes to PyByteArray
Christian Heimes <christian@cheimes.de>
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159 || PyUnicode_CheckExact(obj) || PyByteArray_CheckExact(obj)) {
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160 return 0;
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161 } else {
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162 return 1;
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163 }
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164 }
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165
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166 void pysqlite_statement_bind_parameters(pysqlite_Statement* self, PyObject* parameters, int allow_8bit_chars)
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167 {
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168 PyObject* current_param;
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169 PyObject* adapted;
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170 const char* binding_name;
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171 int i;
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172 int rc;
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173 int num_params_needed;
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174 int num_params;
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175
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176 Py_BEGIN_ALLOW_THREADS
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177 num_params_needed = sqlite3_bind_parameter_count(self->st);
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178 Py_END_ALLOW_THREADS
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179
46178
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180 if (PyTuple_CheckExact(parameters) || PyList_CheckExact(parameters) || (!PyDict_Check(parameters) && PySequence_Check(parameters))) {
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181 /* parameters passed as sequence */
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182 if (PyTuple_CheckExact(parameters)) {
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183 num_params = PyTuple_GET_SIZE(parameters);
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184 } else if (PyList_CheckExact(parameters)) {
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185 num_params = PyList_GET_SIZE(parameters);
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186 } else {
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187 num_params = PySequence_Size(parameters);
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188 }
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189 if (num_params != num_params_needed) {
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190 PyErr_Format(pysqlite_ProgrammingError, "Incorrect number of bindings supplied. The current statement uses %d, and there are %d supplied.",
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diff changeset
191 num_params_needed, num_params);
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192 return;
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diff changeset
193 }
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194 for (i = 0; i < num_params; i++) {
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195 if (PyTuple_CheckExact(parameters)) {
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196 current_param = PyTuple_GET_ITEM(parameters, i);
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197 Py_XINCREF(current_param);
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198 } else if (PyList_CheckExact(parameters)) {
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199 current_param = PyList_GET_ITEM(parameters, i);
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200 Py_XINCREF(current_param);
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diff changeset
201 } else {
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diff changeset
202 current_param = PySequence_GetItem(parameters, i);
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203 }
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diff changeset
204 if (!current_param) {
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205 return;
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diff changeset
206 }
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diff changeset
207
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diff changeset
208 if (!_need_adapt(current_param)) {
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209 adapted = current_param;
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210 } else {
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diff changeset
211 adapted = pysqlite_microprotocols_adapt(current_param, (PyObject*)&pysqlite_PrepareProtocolType, NULL);
46178
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diff changeset
212 if (adapted) {
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213 Py_DECREF(current_param);
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214 } else {
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diff changeset
215 PyErr_Clear();
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diff changeset
216 adapted = current_param;
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diff changeset
217 }
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diff changeset
218 }
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diff changeset
219
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diff changeset
220 rc = pysqlite_statement_bind_parameter(self, i + 1, adapted, allow_8bit_chars);
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diff changeset
221 Py_DECREF(adapted);
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diff changeset
222
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diff changeset
223 if (rc != SQLITE_OK) {
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diff changeset
224 if (!PyErr_Occurred()) {
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225 PyErr_Format(pysqlite_InterfaceError, "Error binding parameter %d - probably unsupported type.", i);
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diff changeset
226 }
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diff changeset
227 return;
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diff changeset
228 }
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229 }
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diff changeset
230 } else if (PyDict_Check(parameters)) {
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231 /* parameters passed as dictionary */
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232 for (i = 1; i <= num_params_needed; i++) {
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233 Py_BEGIN_ALLOW_THREADS
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diff changeset
234 binding_name = sqlite3_bind_parameter_name(self->st, i);
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235 Py_END_ALLOW_THREADS
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diff changeset
236 if (!binding_name) {
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237 PyErr_Format(pysqlite_ProgrammingError, "Binding %d has no name, but you supplied a dictionary (which has only names).", i);
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238 return;
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239 }
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240
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241 binding_name++; /* skip first char (the colon) */
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242 if (PyDict_CheckExact(parameters)) {
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243 current_param = PyDict_GetItemString(parameters, binding_name);
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244 Py_XINCREF(current_param);
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245 } else {
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246 current_param = PyMapping_GetItemString(parameters, (char*)binding_name);
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247 }
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248 if (!current_param) {
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249 PyErr_Format(pysqlite_ProgrammingError, "You did not supply a value for binding %d.", i);
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250 return;
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251 }
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252
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253 if (!_need_adapt(current_param)) {
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254 adapted = current_param;
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255 } else {
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256 adapted = pysqlite_microprotocols_adapt(current_param, (PyObject*)&pysqlite_PrepareProtocolType, NULL);
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257 if (adapted) {
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258 Py_DECREF(current_param);
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259 } else {
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260 PyErr_Clear();
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261 adapted = current_param;
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262 }
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263 }
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264
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265 rc = pysqlite_statement_bind_parameter(self, i, adapted, allow_8bit_chars);
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266 Py_DECREF(adapted);
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267
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268 if (rc != SQLITE_OK) {
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269 if (!PyErr_Occurred()) {
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270 PyErr_Format(pysqlite_InterfaceError, "Error binding parameter :%s - probably unsupported type.", binding_name);
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271 }
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272 return;
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273 }
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274 }
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275 } else {
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276 PyErr_SetString(PyExc_ValueError, "parameters are of unsupported type");
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277 }
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278 }
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279
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280 int pysqlite_statement_recompile(pysqlite_Statement* self, PyObject* params)
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281 {
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282 const char* tail;
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283 int rc;
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284 const char* sql_cstr;
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285 Py_ssize_t sql_len;
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286 sqlite3_stmt* new_st;
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287
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288 sql_cstr = _PyUnicode_AsStringAndSize(self->sql, &sql_len);
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289 if (sql_cstr == NULL) {
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290 rc = PYSQLITE_SQL_WRONG_TYPE;
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291 return rc;
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292 }
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293
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294 Py_BEGIN_ALLOW_THREADS
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295 rc = sqlite3_prepare(self->db,
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296 sql_cstr,
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297 -1,
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298 &new_st,
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299 &tail);
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300 Py_END_ALLOW_THREADS
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301
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302 if (rc == SQLITE_OK) {
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303 /* The efficient sqlite3_transfer_bindings is only available in SQLite
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304 * version 3.2.2 or later. For older SQLite releases, that might not
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305 * even define SQLITE_VERSION_NUMBER, we do it the manual way.
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306 */
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307 #ifdef SQLITE_VERSION_NUMBER
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308 #if SQLITE_VERSION_NUMBER >= 3002002
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309 /* The check for the number of parameters is necessary to not trigger a
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310 * bug in certain SQLite versions (experienced in 3.2.8 and 3.3.4). */
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311 if (sqlite3_bind_parameter_count(self->st) > 0) {
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312 (void)sqlite3_transfer_bindings(self->st, new_st);
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313 }
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314 #endif
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315 #else
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316 statement_bind_parameters(self, params);
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317 #endif
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318
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319 (void)sqlite3_finalize(self->st);
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320 self->st = new_st;
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321 }
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322
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323 return rc;
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324 }
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325
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326 int pysqlite_statement_finalize(pysqlite_Statement* self)
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327 {
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328 int rc;
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329
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330 rc = SQLITE_OK;
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331 if (self->st) {
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332 Py_BEGIN_ALLOW_THREADS
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333 rc = sqlite3_finalize(self->st);
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334 Py_END_ALLOW_THREADS
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335 self->st = NULL;
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336 }
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337
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338 self->in_use = 0;
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339
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340 return rc;
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341 }
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342
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343 int pysqlite_statement_reset(pysqlite_Statement* self)
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344 {
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345 int rc;
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346
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347 rc = SQLITE_OK;
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348
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349 if (self->in_use && self->st) {
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350 Py_BEGIN_ALLOW_THREADS
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351 rc = sqlite3_reset(self->st);
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352 Py_END_ALLOW_THREADS
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353
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354 if (rc == SQLITE_OK) {
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355 self->in_use = 0;
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356 }
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357 }
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358
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359 return rc;
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360 }
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361
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362 void pysqlite_statement_mark_dirty(pysqlite_Statement* self)
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363 {
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364 self->in_use = 1;
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365 }
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366
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367 void pysqlite_statement_dealloc(pysqlite_Statement* self)
37879
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368 {
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369 int rc;
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370
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371 if (self->st) {
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372 Py_BEGIN_ALLOW_THREADS
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373 rc = sqlite3_finalize(self->st);
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374 Py_END_ALLOW_THREADS
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375 }
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376
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377 self->st = NULL;
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378
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379 Py_XDECREF(self->sql);
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380
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381 if (self->in_weakreflist != NULL) {
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382 PyObject_ClearWeakRefs((PyObject*)self);
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383 }
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384
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86a2679dca46 #1629: Renamed Py_Size, Py_Type and Py_Refcnt to Py_SIZE, Py_TYPE and Py_REFCNT.
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385 Py_TYPE(self)->tp_free((PyObject*)self);
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386 }
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387
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388 /*
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389 * Checks if there is anything left in an SQL string after SQLite compiled it.
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390 * This is used to check if somebody tried to execute more than one SQL command
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391 * with one execute()/executemany() command, which the DB-API and we don't
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392 * allow.
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393 *
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394 * Returns 1 if there is more left than should be. 0 if ok.
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395 */
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396 static int pysqlite_check_remaining_sql(const char* tail)
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397 {
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398 const char* pos = tail;
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399
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400 parse_remaining_sql_state state = NORMAL;
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401
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402 for (;;) {
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403 switch (*pos) {
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404 case 0:
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405 return 0;
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406 case '-':
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407 if (state == NORMAL) {
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408 state = LINECOMMENT_1;
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409 } else if (state == LINECOMMENT_1) {
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410 state = IN_LINECOMMENT;
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411 }
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412 break;
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413 case ' ':
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414 case '\t':
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415 break;
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416 case '\n':
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417 case 13:
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418 if (state == IN_LINECOMMENT) {
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419 state = NORMAL;
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420 }
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421 break;
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422 case '/':
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423 if (state == NORMAL) {
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424 state = COMMENTSTART_1;
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425 } else if (state == COMMENTEND_1) {
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426 state = NORMAL;
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427 } else if (state == COMMENTSTART_1) {
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428 return 1;
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429 }
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430 break;
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431 case '*':
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432 if (state == NORMAL) {
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433 return 1;
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434 } else if (state == LINECOMMENT_1) {
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435 return 1;
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436 } else if (state == COMMENTSTART_1) {
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437 state = IN_COMMENT;
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438 } else if (state == IN_COMMENT) {
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diff changeset
439 state = COMMENTEND_1;
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440 }
f731859e9b3b Merge p3yk branch with the trunk up to revision 45595. This breaks a fair
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441 break;
f731859e9b3b Merge p3yk branch with the trunk up to revision 45595. This breaks a fair
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442 default:
f731859e9b3b Merge p3yk branch with the trunk up to revision 45595. This breaks a fair
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443 if (state == COMMENTEND_1) {
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444 state = IN_COMMENT;
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445 } else if (state == IN_LINECOMMENT) {
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446 } else if (state == IN_COMMENT) {
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447 } else {
f731859e9b3b Merge p3yk branch with the trunk up to revision 45595. This breaks a fair
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448 return 1;
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449 }
f731859e9b3b Merge p3yk branch with the trunk up to revision 45595. This breaks a fair
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450 }
f731859e9b3b Merge p3yk branch with the trunk up to revision 45595. This breaks a fair
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parents:
diff changeset
451
f731859e9b3b Merge p3yk branch with the trunk up to revision 45595. This breaks a fair
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diff changeset
452 pos++;
f731859e9b3b Merge p3yk branch with the trunk up to revision 45595. This breaks a fair
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453 }
f731859e9b3b Merge p3yk branch with the trunk up to revision 45595. This breaks a fair
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parents:
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454
f731859e9b3b Merge p3yk branch with the trunk up to revision 45595. This breaks a fair
Thomas Wouters <thomas@python.org>
parents:
diff changeset
455 return 0;
f731859e9b3b Merge p3yk branch with the trunk up to revision 45595. This breaks a fair
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parents:
diff changeset
456 }
f731859e9b3b Merge p3yk branch with the trunk up to revision 45595. This breaks a fair
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parents:
diff changeset
457
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diff changeset
458 PyTypeObject pysqlite_StatementType = {
42334
e70cdce0e8b2 Merged revisions 56467-56482 via svnmerge from
Martin v. Löwis <martin@v.loewis.de>
parents: 41669
diff changeset
459 PyVarObject_HEAD_INIT(NULL, 0)
37879
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diff changeset
460 MODULE_NAME ".Statement", /* tp_name */
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diff changeset
461 sizeof(pysqlite_Statement), /* tp_basicsize */
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462 0, /* tp_itemsize */
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463 (destructor)pysqlite_statement_dealloc, /* tp_dealloc */
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464 0, /* tp_print */
f731859e9b3b Merge p3yk branch with the trunk up to revision 45595. This breaks a fair
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465 0, /* tp_getattr */
f731859e9b3b Merge p3yk branch with the trunk up to revision 45595. This breaks a fair
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diff changeset
466 0, /* tp_setattr */
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Mark Dickinson <dickinsm@gmail.com>
parents: 49264
diff changeset
467 0, /* tp_reserved */
37879
f731859e9b3b Merge p3yk branch with the trunk up to revision 45595. This breaks a fair
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468 0, /* tp_repr */
f731859e9b3b Merge p3yk branch with the trunk up to revision 45595. This breaks a fair
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parents:
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469 0, /* tp_as_number */
f731859e9b3b Merge p3yk branch with the trunk up to revision 45595. This breaks a fair
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parents:
diff changeset
470 0, /* tp_as_sequence */
f731859e9b3b Merge p3yk branch with the trunk up to revision 45595. This breaks a fair
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parents:
diff changeset
471 0, /* tp_as_mapping */
f731859e9b3b Merge p3yk branch with the trunk up to revision 45595. This breaks a fair
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parents:
diff changeset
472 0, /* tp_hash */
f731859e9b3b Merge p3yk branch with the trunk up to revision 45595. This breaks a fair
Thomas Wouters <thomas@python.org>
parents:
diff changeset
473 0, /* tp_call */
f731859e9b3b Merge p3yk branch with the trunk up to revision 45595. This breaks a fair
Thomas Wouters <thomas@python.org>
parents:
diff changeset
474 0, /* tp_str */
f731859e9b3b Merge p3yk branch with the trunk up to revision 45595. This breaks a fair
Thomas Wouters <thomas@python.org>
parents:
diff changeset
475 0, /* tp_getattro */
f731859e9b3b Merge p3yk branch with the trunk up to revision 45595. This breaks a fair
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parents:
diff changeset
476 0, /* tp_setattro */
f731859e9b3b Merge p3yk branch with the trunk up to revision 45595. This breaks a fair
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parents:
diff changeset
477 0, /* tp_as_buffer */
46178
e06e08e8fdce Bring sqlite3 module up-to-date with what's now in 2.6. Almost. I intentionally
Gerhard Häring <gh@ghaering.de>
parents: 44351
diff changeset
478 Py_TPFLAGS_DEFAULT, /* tp_flags */
37879
f731859e9b3b Merge p3yk branch with the trunk up to revision 45595. This breaks a fair
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parents:
diff changeset
479 0, /* tp_doc */
f731859e9b3b Merge p3yk branch with the trunk up to revision 45595. This breaks a fair
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parents:
diff changeset
480 0, /* tp_traverse */
f731859e9b3b Merge p3yk branch with the trunk up to revision 45595. This breaks a fair
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parents:
diff changeset
481 0, /* tp_clear */
f731859e9b3b Merge p3yk branch with the trunk up to revision 45595. This breaks a fair
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parents:
diff changeset
482 0, /* tp_richcompare */
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diff changeset
483 offsetof(pysqlite_Statement, in_weakreflist), /* tp_weaklistoffset */
37879
f731859e9b3b Merge p3yk branch with the trunk up to revision 45595. This breaks a fair
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parents:
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484 0, /* tp_iter */
f731859e9b3b Merge p3yk branch with the trunk up to revision 45595. This breaks a fair
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parents:
diff changeset
485 0, /* tp_iternext */
f731859e9b3b Merge p3yk branch with the trunk up to revision 45595. This breaks a fair
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parents:
diff changeset
486 0, /* tp_methods */
f731859e9b3b Merge p3yk branch with the trunk up to revision 45595. This breaks a fair
Thomas Wouters <thomas@python.org>
parents:
diff changeset
487 0, /* tp_members */
f731859e9b3b Merge p3yk branch with the trunk up to revision 45595. This breaks a fair
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parents:
diff changeset
488 0, /* tp_getset */
f731859e9b3b Merge p3yk branch with the trunk up to revision 45595. This breaks a fair
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parents:
diff changeset
489 0, /* tp_base */
f731859e9b3b Merge p3yk branch with the trunk up to revision 45595. This breaks a fair
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490 0, /* tp_dict */
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491 0, /* tp_descr_get */
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492 0, /* tp_descr_set */
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493 0, /* tp_dictoffset */
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494 (initproc)0, /* tp_init */
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495 0, /* tp_alloc */
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496 0, /* tp_new */
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497 0 /* tp_free */
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498 };
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499
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500 extern int pysqlite_statement_setup_types(void)
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501 {
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502 pysqlite_StatementType.tp_new = PyType_GenericNew;
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503 return PyType_Ready(&pysqlite_StatementType);
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504 }