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annotate Framework/Odbc/OdbcPreparedStatement.cpp @ 522:c49136b34891 large-queries tip

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use a prepared statement for InsertOrUpdateMetadata
author Alain Mazy <am@orthanc.team>
date Fri, 05 Jul 2024 09:15:54 +0200
parents 54d518dcd74a
children
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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) 2017-2023 Osimis S.A., Belgium
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6 * Copyright (C) 2024-2024 Orthanc Team SRL, Belgium
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7 * Copyright (C) 2021-2024 Sebastien Jodogne, ICTEAM UCLouvain, Belgium
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8 *
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9 * This program is free software: you can redistribute it and/or
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10 * modify it under the terms of the GNU Affero General Public License
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11 * as published by the Free Software Foundation, either version 3 of
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12 * the License, or (at your option) any later version.
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13 *
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14 * This program is distributed in the hope that it will be useful, but
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15 * WITHOUT ANY WARRANTY; without even the implied warranty of
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16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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17 * Affero General Public License for more details.
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18 *
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19 * You should have received a copy of the GNU Affero General Public License
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20 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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21 **/
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22
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23
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24 #include "OdbcPreparedStatement.h"
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25
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26 #include "../Common/InputFileValue.h"
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27 #include "../Common/Integer64Value.h"
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28 #include "../Common/Utf8StringValue.h"
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29 #include "OdbcResult.h"
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30
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31 #include <Logging.h>
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32 #include <OrthancException.h>
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33
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34 #include <sqlext.h>
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35
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36
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37 namespace OrthancDatabases
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38 {
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39 void OdbcPreparedStatement::Setup(const Query& query)
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40 {
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41 formatter_.SetNamedDialect(Dialect_MSSQL); /* ODBC uses "?" to name its parameters */
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42
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43 std::string sql;
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44 query.Format(sql, formatter_);
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45
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46 LOG(INFO) << "Preparing ODBC statement: " << sql;
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47 SQLCHAR* s = const_cast<SQLCHAR*>(reinterpret_cast<const SQLCHAR*>(sql.c_str()));
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48
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49 if (!SQL_SUCCEEDED(SQLPrepare(statement_.GetHandle(), s, SQL_NTS)))
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50 {
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51 throw Orthanc::OrthancException(Orthanc::ErrorCode_Database,
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52 "Cannot prepare ODBC statement: " + sql);
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53 }
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54
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55 paramsIndex_.resize(formatter_.GetParametersCount());
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56
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57 size_t countInt64 = 0;
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58 size_t countStrings = 0;
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59
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60 for (size_t i = 0; i < paramsIndex_.size(); i++)
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61 {
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62 switch (formatter_.GetParameterType(i))
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63 {
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64 case ValueType_Integer64:
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65 paramsIndex_[i] = countInt64;
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66 countInt64++;
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67 break;
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68
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69 case ValueType_InputFile:
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70 case ValueType_Utf8String:
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71 paramsIndex_[i] = countStrings;
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72 countStrings++;
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73 break;
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74
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75 default:
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76 throw Orthanc::OrthancException(Orthanc::ErrorCode_NotImplemented);
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77 }
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78 }
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79
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80 paramsInt64_.resize(countInt64);
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81 paramsString_.resize(countStrings);
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82 }
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83
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84
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85 OdbcPreparedStatement::OdbcPreparedStatement(SQLHSTMT databaseHandle,
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86 Dialect dialect,
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87 const Query& query) :
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88 statement_(databaseHandle),
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89 formatter_(dialect)
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90 {
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91 Setup(query);
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92 }
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93
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94
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95 OdbcPreparedStatement::OdbcPreparedStatement(SQLHSTMT databaseHandle,
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96 Dialect dialect,
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97 const std::string& sql) :
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98 statement_(databaseHandle),
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99 formatter_(dialect)
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100 {
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101 Query query(sql);
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102 Setup(query);
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103 }
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104
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105
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106 IResult* OdbcPreparedStatement::Execute()
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107 {
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108 Dictionary parameters;
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109 return Execute(parameters);
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110 }
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111
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112
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113 IResult* OdbcPreparedStatement::Execute(const Dictionary& parameters)
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114 {
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115 /**
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116 * NB: This class creates a copy of all the string parameters from
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117 * "parameters", because "SQLBindParameter()" assumes that the
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118 * lifetime of the bound values must be larger than the lifetime
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119 * of the cursor. This is no problem for the index plugin, but
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120 * might be problematic if storing large files in the storage area
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121 * (as this doubles RAM requirements).
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122 **/
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123
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124 for (size_t i = 0; i < formatter_.GetParametersCount(); i++)
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125 {
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126 const std::string& name = formatter_.GetParameterName(i);
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127
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128 if (!parameters.HasKey(name))
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129 {
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130 throw Orthanc::OrthancException(Orthanc::ErrorCode_InexistentItem,
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131 "Missing parameter to SQL prepared statement: " + name);
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132 }
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133 else
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134 {
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135 const IValue& value = parameters.GetValue(name);
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136 if (value.GetType() == ValueType_Null)
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137 {
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138 SQLSMALLINT cType, sqlType;
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139
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140 switch (formatter_.GetParameterType(i))
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141 {
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142 case ValueType_Integer64:
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143 cType = SQL_C_SBIGINT;
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144 sqlType = SQL_BIGINT;
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145 break;
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146
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147 case ValueType_Utf8String:
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148 cType = SQL_C_CHAR;
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149 sqlType = SQL_VARCHAR;
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150 break;
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151
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152 default:
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153 throw Orthanc::OrthancException(Orthanc::ErrorCode_NotImplemented);
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154 }
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155
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156 SQLLEN null = SQL_NULL_DATA;
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157 if (!SQL_SUCCEEDED(SQLBindParameter(statement_.GetHandle(), i + 1, SQL_PARAM_INPUT, cType, sqlType,
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158 0 /* ignored */, 0 /* ignored */, NULL, 0, &null)))
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159 {
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160 throw Orthanc::OrthancException(Orthanc::ErrorCode_Database,
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161 "Cannot bind NULL parameter: " + statement_.FormatError());
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162 }
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163 }
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164 else if (value.GetType() != formatter_.GetParameterType(i))
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165 {
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166 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadParameterType,
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167 "Parameter \"" + name + "\" should be of type \"" +
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168 EnumerationToString(formatter_.GetParameterType(i)) +
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169 "\", found \"" + EnumerationToString(value.GetType()) + "\"");
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170 }
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171 else
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172 {
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173 assert(i < paramsIndex_.size());
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174 size_t index = paramsIndex_[i];
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175
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176 switch (value.GetType())
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177 {
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178 case ValueType_Integer64:
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179 assert(index < paramsInt64_.size());
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180 paramsInt64_[index] = dynamic_cast<const Integer64Value&>(value).GetValue();
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181
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182 if (!SQL_SUCCEEDED(SQLBindParameter(statement_.GetHandle(), i + 1, SQL_PARAM_INPUT, SQL_C_SBIGINT, SQL_BIGINT,
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183 0 /* ignored */, 0 /* ignored */, &paramsInt64_[index],
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184 sizeof(int64_t), NULL)))
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185 {
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186 throw Orthanc::OrthancException(Orthanc::ErrorCode_Database,
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187 "Cannot bind integer parameter: " + statement_.FormatError());
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188 }
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189
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190 break;
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191
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192 case ValueType_Utf8String:
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193 {
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194 assert(index < paramsString_.size());
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195 paramsString_[index] = dynamic_cast<const Utf8StringValue&>(value).GetContent();
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196
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197 const char* content = (paramsString_[index].empty() ? "" : paramsString_[index].c_str());
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198
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199 if (!SQL_SUCCEEDED(SQLBindParameter(
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200 statement_.GetHandle(), i + 1, SQL_PARAM_INPUT, SQL_C_CHAR, SQL_VARCHAR,
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201 0 /* ignored */, 0 /* ignored */, const_cast<char*>(content), paramsString_[index].size(), NULL)))
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202 {
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203 throw Orthanc::OrthancException(Orthanc::ErrorCode_Database,
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204 "Cannot bind UTF-8 parameter: " + statement_.FormatError());
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205 }
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206
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207 break;
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208 }
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209
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210 case ValueType_InputFile:
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211 {
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212 assert(index < paramsString_.size());
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213 paramsString_[index] = dynamic_cast<const InputFileValue&>(value).GetContent();
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214
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215 const char* content = (paramsString_[index].empty() ? NULL : paramsString_[index].c_str());
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216
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217 SQLLEN a = paramsString_[index].size();
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218 if (!SQL_SUCCEEDED(SQLBindParameter(
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219 statement_.GetHandle(), i + 1, SQL_PARAM_INPUT, SQL_C_BINARY, SQL_LONGVARBINARY,
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220 paramsString_[index].size() /* only used by MSSQL */,
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221 0 /* ignored */, const_cast<char*>(content), 0, &a)))
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222 {
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223 throw Orthanc::OrthancException(Orthanc::ErrorCode_Database,
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224 "Cannot bind binary parameter: " + statement_.FormatError());
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225 }
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226
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227 break;
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228 }
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229
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230 default:
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231 throw Orthanc::OrthancException(Orthanc::ErrorCode_NotImplemented);
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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
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237 const Dialect dialect = formatter_.GetAutoincrementDialect();
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238
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239 SQLRETURN code = SQLExecute(statement_.GetHandle());
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240
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241 if (code == SQL_SUCCESS ||
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242 code == SQL_NO_DATA /* this is the case of DELETE in PostgreSQL and MSSQL */)
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243 {
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244 return new OdbcResult(statement_, dialect);
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245 }
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246 else
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247 {
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248 statement_.CheckCollision(dialect);
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249
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250 throw Orthanc::OrthancException(Orthanc::ErrorCode_Database,
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251 "Cannot execute ODBC statement:\n" + statement_.FormatError());
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252 }
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253 }
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254 }