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annotate Framework/Odbc/OdbcPreparedStatement.cpp @ 329:b5fb8b77ce4d

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initial commit of ODBC framework
author Sebastien Jodogne <s.jodogne@gmail.com>
date Tue, 10 Aug 2021 20:08:53 +0200
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children 16aac0287485
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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
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5 * Copyright (C) 2017-2021 Osimis S.A., Belgium
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6 *
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7 * This program is free software: you can redistribute it and/or
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8 * modify it under the terms of the GNU Affero General Public License
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9 * as published by the Free Software Foundation, either version 3 of
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10 * the License, or (at your option) any later version.
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11 *
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12 * This program is distributed in the hope that it will be useful, but
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13 * WITHOUT ANY WARRANTY; without even the implied warranty of
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14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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15 * Affero General Public License for more details.
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16 *
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17 * You should have received a copy of the GNU Affero General Public License
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18 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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19 **/
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20
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21
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22 #include "OdbcPreparedStatement.h"
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23
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24 #include "../Common/InputFileValue.h"
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25 #include "../Common/Integer64Value.h"
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26 #include "../Common/Utf8StringValue.h"
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27 #include "OdbcResult.h"
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28
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29 #include <Logging.h>
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30 #include <OrthancException.h>
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31
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32 #include <sqlext.h>
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33
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35 namespace OrthancDatabases
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36 {
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37 void OdbcPreparedStatement::Setup(const Query& query)
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38 {
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39 formatter_.SetNamedDialect(Dialect_MSSQL); /* ODBC uses "?" to name its parameters */
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40
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41 std::string sql;
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42 query.Format(sql, formatter_);
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43
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44 LOG(INFO) << "Preparing ODBC statement: " << sql;
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45 SQLCHAR* s = const_cast<SQLCHAR*>(reinterpret_cast<const SQLCHAR*>(sql.c_str()));
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46
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47 if (!SQL_SUCCEEDED(SQLPrepare(statement_.GetHandle(), s, SQL_NTS)))
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48 {
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49 throw Orthanc::OrthancException(Orthanc::ErrorCode_Database,
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50 "Cannot prepare ODBC statement: " + sql);
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51 }
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52
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53 paramsIndex_.resize(formatter_.GetParametersCount());
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54
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55 size_t countInt64 = 0;
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56 size_t countStrings = 0;
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57
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58 for (size_t i = 0; i < paramsIndex_.size(); i++)
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59 {
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60 switch (formatter_.GetParameterType(i))
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61 {
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62 case ValueType_Integer64:
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63 paramsIndex_[i] = countInt64;
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64 countInt64++;
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65 break;
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66
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67 case ValueType_InputFile:
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68 case ValueType_Utf8String:
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69 paramsIndex_[i] = countStrings;
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70 countStrings++;
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71 break;
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72
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73 default:
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74 throw Orthanc::OrthancException(Orthanc::ErrorCode_NotImplemented);
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75 }
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76 }
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77
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78 paramsInt64_.resize(countInt64);
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79 paramsString_.resize(countStrings);
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80 }
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81
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82
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83 OdbcPreparedStatement::OdbcPreparedStatement(SQLHSTMT databaseHandle,
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84 Dialect dialect,
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85 const Query& query) :
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86 statement_(databaseHandle),
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87 formatter_(dialect)
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88 {
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89 Setup(query);
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90 }
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91
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92
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93 OdbcPreparedStatement::OdbcPreparedStatement(SQLHSTMT databaseHandle,
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94 Dialect dialect,
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95 const std::string& sql) :
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96 statement_(databaseHandle),
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97 formatter_(dialect)
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98 {
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99 Query query(sql);
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100 Setup(query);
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101 }
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102
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103
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104 IResult* OdbcPreparedStatement::Execute()
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105 {
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106 Dictionary parameters;
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107 return Execute(parameters);
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108 }
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109
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110
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111 IResult* OdbcPreparedStatement::Execute(const Dictionary& parameters)
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112 {
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113 /**
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114 * NB: This class creates a copy of all the string parameters from
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115 * "parameters", because "SQLBindParameter()" assumes that the
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116 * lifetime of the bound values must be larger than the lifetime
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117 * of the cursor. This is no problem for the index plugin, but
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118 * might be problematic if storing large files in the storage area
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119 * (as this doubles RAM requirements).
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120 **/
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121
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122 for (size_t i = 0; i < formatter_.GetParametersCount(); i++)
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123 {
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124 const std::string& name = formatter_.GetParameterName(i);
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125
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126 if (!parameters.HasKey(name))
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127 {
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128 throw Orthanc::OrthancException(Orthanc::ErrorCode_InexistentItem,
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129 "Missing parameter to SQL prepared statement: " + name);
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130 }
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131 else
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132 {
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133 const IValue& value = parameters.GetValue(name);
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134 if (value.GetType() == ValueType_Null)
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135 {
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136 SQLSMALLINT cType, sqlType;
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137
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138 switch (formatter_.GetParameterType(i))
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139 {
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140 case ValueType_Integer64:
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141 cType = SQL_C_SBIGINT;
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142 sqlType = SQL_BIGINT;
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143 break;
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144
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145 case ValueType_Utf8String:
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146 cType = SQL_C_CHAR;
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147 sqlType = SQL_VARCHAR;
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148 break;
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149
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150 default:
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151 throw Orthanc::OrthancException(Orthanc::ErrorCode_NotImplemented);
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152 }
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153
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154 SQLLEN null = SQL_NULL_DATA;
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155 if (!SQL_SUCCEEDED(SQLBindParameter(statement_.GetHandle(), i + 1, SQL_PARAM_INPUT, cType, sqlType,
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156 0 /* ignored */, 0 /* ignored */, NULL, 0, &null)))
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157 {
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158 throw Orthanc::OrthancException(Orthanc::ErrorCode_Database,
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159 "Cannot bind NULL parameter: " + statement_.FormatError());
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160 }
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161 }
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162 else if (value.GetType() != formatter_.GetParameterType(i))
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163 {
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164 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadParameterType,
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165 "Parameter \"" + name + "\" should be of type \"" +
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166 EnumerationToString(formatter_.GetParameterType(i)) +
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167 "\", found \"" + EnumerationToString(value.GetType()) + "\"");
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168 }
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169 else
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170 {
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171 assert(i < paramsIndex_.size());
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172 size_t index = paramsIndex_[i];
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173
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174 switch (value.GetType())
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175 {
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176 case ValueType_Integer64:
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177 assert(index < paramsInt64_.size());
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178 paramsInt64_[index] = dynamic_cast<const Integer64Value&>(value).GetValue();
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179
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180 if (!SQL_SUCCEEDED(SQLBindParameter(statement_.GetHandle(), i + 1, SQL_PARAM_INPUT, SQL_C_SBIGINT, SQL_BIGINT,
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181 0 /* ignored */, 0 /* ignored */, &paramsInt64_[index],
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182 sizeof(int64_t), NULL)))
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183 {
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184 throw Orthanc::OrthancException(Orthanc::ErrorCode_Database,
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185 "Cannot bind integer parameter: " + statement_.FormatError());
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186 }
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187
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188 break;
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189
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190 case ValueType_Utf8String:
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191 {
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192 assert(index < paramsString_.size());
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193 paramsString_[index] = dynamic_cast<const Utf8StringValue&>(value).GetContent();
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194
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195 const char* content = (paramsString_[index].empty() ? "" : paramsString_[index].c_str());
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196
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197 if (!SQL_SUCCEEDED(SQLBindParameter(
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198 statement_.GetHandle(), i + 1, SQL_PARAM_INPUT, SQL_C_CHAR, SQL_VARCHAR,
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199 0 /* ignored */, 0 /* ignored */, const_cast<char*>(content), paramsString_[index].size(), NULL)))
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200 {
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201 throw Orthanc::OrthancException(Orthanc::ErrorCode_Database,
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202 "Cannot bind UTF-8 parameter: " + statement_.FormatError());
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203 }
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diff changeset
204
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205 break;
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206 }
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207
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208 case ValueType_InputFile:
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209 {
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210 assert(index < paramsString_.size());
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211 paramsString_[index] = dynamic_cast<const InputFileValue&>(value).GetContent();
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212
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213 const char* content = (paramsString_[index].empty() ? NULL : paramsString_[index].c_str());
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214
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215 SQLLEN a = paramsString_[index].size();
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216 if (!SQL_SUCCEEDED(SQLBindParameter(
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217 statement_.GetHandle(), i + 1, SQL_PARAM_INPUT, SQL_C_BINARY, SQL_LONGVARBINARY,
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218 paramsString_[index].size() /* only used by MSSQL */,
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219 0 /* ignored */, const_cast<char*>(content), 0, &a)))
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220 {
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221 throw Orthanc::OrthancException(Orthanc::ErrorCode_Database,
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222 "Cannot bind binary parameter: " + statement_.FormatError());
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223 }
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diff changeset
224
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225 break;
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226 }
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227
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228 default:
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229 throw Orthanc::OrthancException(Orthanc::ErrorCode_NotImplemented);
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diff changeset
230 }
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diff changeset
231 }
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232 }
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diff changeset
233 }
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234
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235 const Dialect dialect = formatter_.GetAutoincrementDialect();
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236
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237 SQLRETURN code = SQLExecute(statement_.GetHandle());
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238
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239 if (code == SQL_SUCCESS ||
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240 code == SQL_NO_DATA /* this is the case of DELETE in PostgreSQL and MSSQL */)
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241 {
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242 return new OdbcResult(statement_, dialect);
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243 }
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244 else
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245 {
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246 statement_.CheckCollision(dialect);
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247
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248 throw Orthanc::OrthancException(Orthanc::ErrorCode_Database,
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249 "Cannot execute ODBC statement:\n" + statement_.FormatError());
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250 }
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diff changeset
251 }
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252 }