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annotate Framework/Odbc/OdbcPreparedStatement.cpp @ 359:16aac0287485

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copyright upgraded to 2022
author Sebastien Jodogne <s.jodogne@gmail.com>
date Mon, 21 Feb 2022 09:32:46 +0100
parents b5fb8b77ce4d
children 3d6886f3e5b3
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1 /**
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2 * Orthanc - A Lightweight, RESTful DICOM Store
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3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
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4 * Department, University Hospital of Liege, Belgium
359
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5 * Copyright (C) 2017-2022 Osimis S.A., Belgium
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6 * Copyright (C) 2021-2022 Sebastien Jodogne, ICTEAM UCLouvain, Belgium
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7 *
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8 * This program is free software: you can redistribute it and/or
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9 * modify it under the terms of the GNU Affero General Public License
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10 * as published by the Free Software Foundation, either version 3 of
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11 * the License, or (at your option) any later version.
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12 *
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13 * This program is distributed in the hope that it will be useful, but
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14 * WITHOUT ANY WARRANTY; without even the implied warranty of
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15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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16 * Affero General Public License for more details.
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17 *
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18 * You should have received a copy of the GNU Affero General Public License
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19 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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20 **/
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23 #include "OdbcPreparedStatement.h"
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24
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25 #include "../Common/InputFileValue.h"
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26 #include "../Common/Integer64Value.h"
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27 #include "../Common/Utf8StringValue.h"
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28 #include "OdbcResult.h"
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29
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30 #include <Logging.h>
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31 #include <OrthancException.h>
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32
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33 #include <sqlext.h>
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34
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36 namespace OrthancDatabases
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37 {
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38 void OdbcPreparedStatement::Setup(const Query& query)
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39 {
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40 formatter_.SetNamedDialect(Dialect_MSSQL); /* ODBC uses "?" to name its parameters */
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41
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42 std::string sql;
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43 query.Format(sql, formatter_);
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44
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45 LOG(INFO) << "Preparing ODBC statement: " << sql;
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46 SQLCHAR* s = const_cast<SQLCHAR*>(reinterpret_cast<const SQLCHAR*>(sql.c_str()));
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47
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48 if (!SQL_SUCCEEDED(SQLPrepare(statement_.GetHandle(), s, SQL_NTS)))
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49 {
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50 throw Orthanc::OrthancException(Orthanc::ErrorCode_Database,
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51 "Cannot prepare ODBC statement: " + sql);
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52 }
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53
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54 paramsIndex_.resize(formatter_.GetParametersCount());
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55
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56 size_t countInt64 = 0;
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57 size_t countStrings = 0;
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58
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59 for (size_t i = 0; i < paramsIndex_.size(); i++)
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60 {
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61 switch (formatter_.GetParameterType(i))
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62 {
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63 case ValueType_Integer64:
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64 paramsIndex_[i] = countInt64;
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65 countInt64++;
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66 break;
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67
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68 case ValueType_InputFile:
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69 case ValueType_Utf8String:
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70 paramsIndex_[i] = countStrings;
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71 countStrings++;
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72 break;
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73
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74 default:
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75 throw Orthanc::OrthancException(Orthanc::ErrorCode_NotImplemented);
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76 }
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77 }
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78
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79 paramsInt64_.resize(countInt64);
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80 paramsString_.resize(countStrings);
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81 }
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82
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83
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84 OdbcPreparedStatement::OdbcPreparedStatement(SQLHSTMT databaseHandle,
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85 Dialect dialect,
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86 const Query& query) :
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87 statement_(databaseHandle),
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88 formatter_(dialect)
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89 {
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90 Setup(query);
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91 }
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92
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93
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94 OdbcPreparedStatement::OdbcPreparedStatement(SQLHSTMT databaseHandle,
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95 Dialect dialect,
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96 const std::string& sql) :
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97 statement_(databaseHandle),
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98 formatter_(dialect)
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99 {
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100 Query query(sql);
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101 Setup(query);
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102 }
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103
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104
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105 IResult* OdbcPreparedStatement::Execute()
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106 {
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107 Dictionary parameters;
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108 return Execute(parameters);
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109 }
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110
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111
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112 IResult* OdbcPreparedStatement::Execute(const Dictionary& parameters)
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113 {
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114 /**
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115 * NB: This class creates a copy of all the string parameters from
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116 * "parameters", because "SQLBindParameter()" assumes that the
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117 * lifetime of the bound values must be larger than the lifetime
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118 * of the cursor. This is no problem for the index plugin, but
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119 * might be problematic if storing large files in the storage area
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120 * (as this doubles RAM requirements).
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121 **/
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122
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123 for (size_t i = 0; i < formatter_.GetParametersCount(); i++)
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124 {
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125 const std::string& name = formatter_.GetParameterName(i);
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126
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127 if (!parameters.HasKey(name))
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128 {
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129 throw Orthanc::OrthancException(Orthanc::ErrorCode_InexistentItem,
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130 "Missing parameter to SQL prepared statement: " + name);
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131 }
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132 else
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133 {
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134 const IValue& value = parameters.GetValue(name);
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135 if (value.GetType() == ValueType_Null)
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136 {
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137 SQLSMALLINT cType, sqlType;
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138
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139 switch (formatter_.GetParameterType(i))
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140 {
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141 case ValueType_Integer64:
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142 cType = SQL_C_SBIGINT;
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143 sqlType = SQL_BIGINT;
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144 break;
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145
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146 case ValueType_Utf8String:
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147 cType = SQL_C_CHAR;
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148 sqlType = SQL_VARCHAR;
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149 break;
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150
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151 default:
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152 throw Orthanc::OrthancException(Orthanc::ErrorCode_NotImplemented);
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153 }
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154
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155 SQLLEN null = SQL_NULL_DATA;
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156 if (!SQL_SUCCEEDED(SQLBindParameter(statement_.GetHandle(), i + 1, SQL_PARAM_INPUT, cType, sqlType,
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157 0 /* ignored */, 0 /* ignored */, NULL, 0, &null)))
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158 {
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159 throw Orthanc::OrthancException(Orthanc::ErrorCode_Database,
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160 "Cannot bind NULL parameter: " + statement_.FormatError());
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161 }
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162 }
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163 else if (value.GetType() != formatter_.GetParameterType(i))
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164 {
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165 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadParameterType,
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166 "Parameter \"" + name + "\" should be of type \"" +
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167 EnumerationToString(formatter_.GetParameterType(i)) +
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168 "\", found \"" + EnumerationToString(value.GetType()) + "\"");
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169 }
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170 else
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171 {
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172 assert(i < paramsIndex_.size());
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173 size_t index = paramsIndex_[i];
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174
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175 switch (value.GetType())
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176 {
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177 case ValueType_Integer64:
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178 assert(index < paramsInt64_.size());
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179 paramsInt64_[index] = dynamic_cast<const Integer64Value&>(value).GetValue();
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180
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181 if (!SQL_SUCCEEDED(SQLBindParameter(statement_.GetHandle(), i + 1, SQL_PARAM_INPUT, SQL_C_SBIGINT, SQL_BIGINT,
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182 0 /* ignored */, 0 /* ignored */, &paramsInt64_[index],
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183 sizeof(int64_t), NULL)))
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184 {
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185 throw Orthanc::OrthancException(Orthanc::ErrorCode_Database,
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186 "Cannot bind integer parameter: " + statement_.FormatError());
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187 }
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188
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189 break;
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190
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191 case ValueType_Utf8String:
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192 {
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193 assert(index < paramsString_.size());
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194 paramsString_[index] = dynamic_cast<const Utf8StringValue&>(value).GetContent();
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195
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196 const char* content = (paramsString_[index].empty() ? "" : paramsString_[index].c_str());
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197
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198 if (!SQL_SUCCEEDED(SQLBindParameter(
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199 statement_.GetHandle(), i + 1, SQL_PARAM_INPUT, SQL_C_CHAR, SQL_VARCHAR,
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200 0 /* ignored */, 0 /* ignored */, const_cast<char*>(content), paramsString_[index].size(), NULL)))
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201 {
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202 throw Orthanc::OrthancException(Orthanc::ErrorCode_Database,
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203 "Cannot bind UTF-8 parameter: " + statement_.FormatError());
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204 }
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205
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206 break;
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207 }
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208
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209 case ValueType_InputFile:
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210 {
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211 assert(index < paramsString_.size());
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212 paramsString_[index] = dynamic_cast<const InputFileValue&>(value).GetContent();
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213
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214 const char* content = (paramsString_[index].empty() ? NULL : paramsString_[index].c_str());
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215
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216 SQLLEN a = paramsString_[index].size();
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217 if (!SQL_SUCCEEDED(SQLBindParameter(
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218 statement_.GetHandle(), i + 1, SQL_PARAM_INPUT, SQL_C_BINARY, SQL_LONGVARBINARY,
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219 paramsString_[index].size() /* only used by MSSQL */,
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220 0 /* ignored */, const_cast<char*>(content), 0, &a)))
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221 {
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222 throw Orthanc::OrthancException(Orthanc::ErrorCode_Database,
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223 "Cannot bind binary parameter: " + statement_.FormatError());
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224 }
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225
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226 break;
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227 }
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228
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229 default:
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230 throw Orthanc::OrthancException(Orthanc::ErrorCode_NotImplemented);
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diff changeset
231 }
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diff changeset
232 }
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233 }
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234 }
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235
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236 const Dialect dialect = formatter_.GetAutoincrementDialect();
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237
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238 SQLRETURN code = SQLExecute(statement_.GetHandle());
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239
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240 if (code == SQL_SUCCESS ||
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241 code == SQL_NO_DATA /* this is the case of DELETE in PostgreSQL and MSSQL */)
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242 {
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243 return new OdbcResult(statement_, dialect);
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244 }
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245 else
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246 {
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247 statement_.CheckCollision(dialect);
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248
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249 throw Orthanc::OrthancException(Orthanc::ErrorCode_Database,
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250 "Cannot execute ODBC statement:\n" + statement_.FormatError());
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251 }
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252 }
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253 }