Mercurial > hg > orthanc
annotate OrthancServer/Sources/Search/ISqlLookupFormatter.cpp @ 5798:ebd828518719 find-refactoring tip
merged default -> find-refactoring
author | Alain Mazy <am@orthanc.team> |
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date | Fri, 20 Sep 2024 08:20:55 +0200 |
parents | 16ce3c920f71 |
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rev | line source |
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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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upgrade to year 2024
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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 General Public License as |
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11 * published by the Free Software Foundation, either version 3 of the |
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12 * 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 * 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 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 "../PrecompiledHeadersServer.h" |
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25 #include "ISqlLookupFormatter.h" |
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26 |
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27 #include "../../../OrthancFramework/Sources/OrthancException.h" |
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28 #include "../../../OrthancFramework/Sources/Toolbox.h" |
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29 #include "../Database/FindRequest.h" |
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30 #include "DatabaseConstraint.h" |
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31 |
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"/tools/find" accepts the "WithLabels" and "WithoutLabels" arguments
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34 #include <list> |
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36 | |
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37 namespace Orthanc |
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38 { |
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39 static std::string FormatLevel(ResourceType level) |
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40 { |
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41 switch (level) |
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42 { |
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43 case ResourceType_Patient: |
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44 return "patients"; |
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45 |
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46 case ResourceType_Study: |
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47 return "studies"; |
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48 |
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49 case ResourceType_Series: |
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50 return "series"; |
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51 |
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52 case ResourceType_Instance: |
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53 return "instances"; |
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54 |
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55 default: |
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56 throw OrthancException(ErrorCode_InternalError); |
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57 } |
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58 } |
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59 |
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60 |
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61 static bool FormatComparison(std::string& target, |
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62 ISqlLookupFormatter& formatter, |
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63 const DatabaseConstraint& constraint, |
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64 size_t index, |
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65 bool escapeBrackets) |
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66 { |
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67 std::string tag = "t" + boost::lexical_cast<std::string>(index); |
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68 |
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69 std::string comparison; |
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70 |
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71 switch (constraint.GetConstraintType()) |
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72 { |
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73 case ConstraintType_Equal: |
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74 case ConstraintType_SmallerOrEqual: |
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75 case ConstraintType_GreaterOrEqual: |
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76 { |
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77 std::string op; |
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78 switch (constraint.GetConstraintType()) |
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79 { |
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80 case ConstraintType_Equal: |
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81 op = "="; |
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82 break; |
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83 |
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84 case ConstraintType_SmallerOrEqual: |
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85 op = "<="; |
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86 break; |
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87 |
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88 case ConstraintType_GreaterOrEqual: |
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89 op = ">="; |
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90 break; |
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91 |
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92 default: |
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93 throw OrthancException(ErrorCode_InternalError); |
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94 } |
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95 |
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96 std::string parameter = formatter.GenerateParameter(constraint.GetSingleValue()); |
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97 |
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98 if (constraint.IsCaseSensitive()) |
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99 { |
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100 comparison = tag + ".value " + op + " " + parameter; |
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101 } |
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102 else |
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103 { |
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104 comparison = "lower(" + tag + ".value) " + op + " lower(" + parameter + ")"; |
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105 } |
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106 |
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107 break; |
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108 } |
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109 |
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110 case ConstraintType_List: |
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111 { |
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112 for (size_t i = 0; i < constraint.GetValuesCount(); i++) |
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113 { |
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114 if (!comparison.empty()) |
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115 { |
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116 comparison += ", "; |
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117 } |
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118 |
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119 std::string parameter = formatter.GenerateParameter(constraint.GetValue(i)); |
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120 |
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121 if (constraint.IsCaseSensitive()) |
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122 { |
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123 comparison += parameter; |
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124 } |
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125 else |
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126 { |
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127 comparison += "lower(" + parameter + ")"; |
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128 } |
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129 } |
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130 |
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131 if (constraint.IsCaseSensitive()) |
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132 { |
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133 comparison = tag + ".value IN (" + comparison + ")"; |
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134 } |
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135 else |
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136 { |
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137 comparison = "lower(" + tag + ".value) IN (" + comparison + ")"; |
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138 } |
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139 |
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140 break; |
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141 } |
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142 |
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143 case ConstraintType_Wildcard: |
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144 { |
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145 const std::string value = constraint.GetSingleValue(); |
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146 |
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147 if (value == "*") |
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148 { |
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149 if (!constraint.IsMandatory()) |
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150 { |
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151 // Universal constraint on an optional tag, ignore it |
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152 return false; |
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153 } |
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154 } |
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155 else |
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156 { |
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157 std::string escaped; |
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158 escaped.reserve(value.size()); |
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159 |
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160 for (size_t i = 0; i < value.size(); i++) |
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161 { |
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162 if (value[i] == '*') |
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163 { |
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164 escaped += "%"; |
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165 } |
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166 else if (value[i] == '?') |
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167 { |
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168 escaped += "_"; |
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169 } |
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170 else if (value[i] == '%') |
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171 { |
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172 escaped += "\\%"; |
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173 } |
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174 else if (value[i] == '_') |
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175 { |
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176 escaped += "\\_"; |
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177 } |
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178 else if (value[i] == '\\') |
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179 { |
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180 escaped += "\\\\"; |
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181 } |
4817
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182 else if (escapeBrackets && value[i] == '[') |
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183 { |
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184 escaped += "\\["; |
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185 } |
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186 else if (escapeBrackets && value[i] == ']') |
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187 { |
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188 escaped += "\\]"; |
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189 } |
3058
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190 else |
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191 { |
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192 escaped += value[i]; |
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193 } |
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194 } |
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195 |
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196 std::string parameter = formatter.GenerateParameter(escaped); |
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197 |
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198 if (constraint.IsCaseSensitive()) |
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199 { |
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ISqlLookupFormatter::FormatWildcardEscape()
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200 comparison = (tag + ".value LIKE " + parameter + " " + |
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201 formatter.FormatWildcardEscape()); |
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202 } |
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203 else |
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204 { |
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205 comparison = ("lower(" + tag + ".value) LIKE lower(" + |
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206 parameter + ") " + formatter.FormatWildcardEscape()); |
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207 } |
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208 } |
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209 |
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210 break; |
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211 } |
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212 |
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213 default: |
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214 return false; |
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215 } |
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216 |
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217 if (constraint.IsMandatory()) |
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218 { |
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219 target = comparison; |
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220 } |
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221 else if (comparison.empty()) |
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222 { |
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223 target = tag + ".value IS NULL"; |
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224 } |
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225 else |
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226 { |
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227 target = tag + ".value IS NULL OR " + comparison; |
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228 } |
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229 |
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230 return true; |
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231 } |
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232 |
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233 |
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234 static void FormatJoin(std::string& target, |
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235 const DatabaseConstraint& constraint, |
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236 size_t index) |
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237 { |
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238 std::string tag = "t" + boost::lexical_cast<std::string>(index); |
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239 |
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240 if (constraint.IsMandatory()) |
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241 { |
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242 target = " INNER JOIN "; |
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243 } |
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244 else |
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245 { |
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246 target = " LEFT JOIN "; |
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247 } |
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248 |
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249 if (constraint.IsIdentifier()) |
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250 { |
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251 target += "DicomIdentifiers "; |
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252 } |
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253 else |
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254 { |
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255 target += "MainDicomTags "; |
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256 } |
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257 |
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258 target += (tag + " ON " + tag + ".id = " + FormatLevel(constraint.GetLevel()) + |
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259 ".internalId AND " + tag + ".tagGroup = " + |
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260 boost::lexical_cast<std::string>(constraint.GetTag().GetGroup()) + |
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261 " AND " + tag + ".tagElement = " + |
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262 boost::lexical_cast<std::string>(constraint.GetTag().GetElement())); |
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263 } |
5227
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264 |
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265 |
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266 static std::string Join(const std::list<std::string>& values, |
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267 const std::string& prefix, |
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268 const std::string& separator) |
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269 { |
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270 if (values.empty()) |
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271 { |
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272 return ""; |
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273 } |
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274 else |
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275 { |
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276 std::string s = prefix; |
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277 |
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278 bool first = true; |
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279 for (std::list<std::string>::const_iterator it = values.begin(); it != values.end(); ++it) |
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280 { |
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281 if (first) |
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282 { |
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283 first = false; |
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284 } |
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285 else |
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286 { |
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287 s += separator; |
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288 } |
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289 |
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290 s += *it; |
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291 } |
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292 |
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293 return s; |
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294 } |
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295 } |
5422 | 296 |
297 static bool FormatComparison2(std::string& target, | |
298 ISqlLookupFormatter& formatter, | |
299 const DatabaseConstraint& constraint, | |
300 bool escapeBrackets) | |
301 { | |
302 std::string comparison; | |
303 std::string tagFilter = ("tagGroup = " + boost::lexical_cast<std::string>(constraint.GetTag().GetGroup()) | |
304 + " AND tagElement = " + boost::lexical_cast<std::string>(constraint.GetTag().GetElement())); | |
305 | |
306 switch (constraint.GetConstraintType()) | |
307 { | |
308 case ConstraintType_Equal: | |
309 case ConstraintType_SmallerOrEqual: | |
310 case ConstraintType_GreaterOrEqual: | |
311 { | |
312 std::string op; | |
313 switch (constraint.GetConstraintType()) | |
314 { | |
315 case ConstraintType_Equal: | |
316 op = "="; | |
317 break; | |
318 | |
319 case ConstraintType_SmallerOrEqual: | |
320 op = "<="; | |
321 break; | |
322 | |
323 case ConstraintType_GreaterOrEqual: | |
324 op = ">="; | |
325 break; | |
326 | |
327 default: | |
328 throw OrthancException(ErrorCode_InternalError); | |
329 } | |
330 | |
331 std::string parameter = formatter.GenerateParameter(constraint.GetSingleValue()); | |
332 | |
333 if (constraint.IsCaseSensitive()) | |
334 { | |
335 comparison = " AND value " + op + " " + parameter; | |
336 } | |
337 else | |
338 { | |
339 comparison = " AND lower(value) " + op + " lower(" + parameter + ")"; | |
340 } | |
341 | |
342 break; | |
343 } | |
344 | |
345 case ConstraintType_List: | |
346 { | |
347 std::vector<std::string> comparisonValues; | |
348 for (size_t i = 0; i < constraint.GetValuesCount(); i++) | |
349 { | |
350 std::string parameter = formatter.GenerateParameter(constraint.GetValue(i)); | |
351 | |
352 if (constraint.IsCaseSensitive()) | |
353 { | |
354 comparisonValues.push_back(parameter); | |
355 } | |
356 else | |
357 { | |
358 comparisonValues.push_back("lower(" + parameter + ")"); | |
359 } | |
360 } | |
361 | |
362 std::string values; | |
363 Toolbox::JoinStrings(values, comparisonValues, ", "); | |
364 | |
365 if (constraint.IsCaseSensitive()) | |
366 { | |
367 comparison = " AND value IN (" + values + ")"; | |
368 } | |
369 else | |
370 { | |
371 comparison = " AND lower(value) IN (" + values + ")"; | |
372 } | |
373 | |
374 break; | |
375 } | |
376 | |
377 case ConstraintType_Wildcard: | |
378 { | |
379 const std::string value = constraint.GetSingleValue(); | |
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380 |
5422 | 381 if (value == "*") |
382 { | |
383 if (!constraint.IsMandatory()) | |
384 { | |
385 // Universal constraint on an optional tag, ignore it | |
386 return false; | |
387 } | |
388 } | |
389 else | |
390 { | |
391 std::string escaped; | |
392 escaped.reserve(value.size()); | |
393 | |
394 for (size_t i = 0; i < value.size(); i++) | |
395 { | |
396 if (value[i] == '*') | |
397 { | |
398 escaped += "%"; | |
399 } | |
400 else if (value[i] == '?') | |
401 { | |
402 escaped += "_"; | |
403 } | |
404 else if (value[i] == '%') | |
405 { | |
406 escaped += "\\%"; | |
407 } | |
408 else if (value[i] == '_') | |
409 { | |
410 escaped += "\\_"; | |
411 } | |
412 else if (value[i] == '\\') | |
413 { | |
414 escaped += "\\\\"; | |
415 } | |
416 else if (escapeBrackets && value[i] == '[') | |
417 { | |
418 escaped += "\\["; | |
419 } | |
420 else if (escapeBrackets && value[i] == ']') | |
421 { | |
422 escaped += "\\]"; | |
423 } | |
424 else | |
425 { | |
426 escaped += value[i]; | |
427 } | |
428 } | |
429 | |
430 std::string parameter = formatter.GenerateParameter(escaped); | |
431 | |
432 if (constraint.IsCaseSensitive()) | |
433 { | |
434 comparison = " AND value LIKE " + parameter + " " + formatter.FormatWildcardEscape(); | |
435 } | |
436 else | |
437 { | |
438 comparison = " AND lower(value) LIKE lower(" + parameter + ") " + formatter.FormatWildcardEscape(); | |
439 } | |
440 } | |
441 | |
442 break; | |
443 } | |
444 | |
445 default: | |
446 return false; | |
447 } | |
448 | |
449 if (constraint.IsMandatory()) | |
450 { | |
451 target = tagFilter + comparison; | |
452 } | |
453 else if (comparison.empty()) | |
454 { | |
455 target = tagFilter + " AND value IS NULL"; | |
456 } | |
457 else | |
458 { | |
459 target = tagFilter + " AND value IS NULL OR " + comparison; | |
460 } | |
461 | |
462 return true; | |
463 } | |
464 | |
465 | |
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466 void ISqlLookupFormatter::GetLookupLevels(ResourceType& lowerLevel, |
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467 ResourceType& upperLevel, |
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468 const ResourceType& queryLevel, |
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469 const DatabaseConstraints& lookup) |
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470 { |
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471 assert(ResourceType_Patient < ResourceType_Study && |
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472 ResourceType_Study < ResourceType_Series && |
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473 ResourceType_Series < ResourceType_Instance); |
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474 |
5422 | 475 lowerLevel = queryLevel; |
476 upperLevel = queryLevel; | |
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477 |
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478 for (size_t i = 0; i < lookup.GetSize(); i++) |
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479 { |
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480 ResourceType level = lookup.GetConstraint(i).GetLevel(); |
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481 |
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482 if (level < upperLevel) |
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483 { |
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484 upperLevel = level; |
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485 } |
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486 |
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487 if (level > lowerLevel) |
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488 { |
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489 lowerLevel = level; |
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490 } |
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491 } |
5422 | 492 } |
493 | |
494 | |
495 void ISqlLookupFormatter::Apply(std::string& sql, | |
496 ISqlLookupFormatter& formatter, | |
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497 const DatabaseConstraints& lookup, |
5422 | 498 ResourceType queryLevel, |
499 const std::set<std::string>& labels, | |
500 LabelsConstraint labelsConstraint, | |
501 size_t limit) | |
502 { | |
503 ResourceType lowerLevel, upperLevel; | |
504 GetLookupLevels(lowerLevel, upperLevel, queryLevel, lookup); | |
505 | |
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506 assert(upperLevel <= queryLevel && |
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507 queryLevel <= lowerLevel); |
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508 |
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509 const bool escapeBrackets = formatter.IsEscapeBrackets(); |
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510 |
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511 std::string joins, comparisons; |
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512 |
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513 size_t count = 0; |
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514 |
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515 for (size_t i = 0; i < lookup.GetSize(); i++) |
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516 { |
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517 const DatabaseConstraint& constraint = lookup.GetConstraint(i); |
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518 |
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519 std::string comparison; |
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520 |
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521 if (FormatComparison(comparison, formatter, constraint, count, escapeBrackets)) |
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522 { |
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523 std::string join; |
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524 FormatJoin(join, constraint, count); |
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525 joins += join; |
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526 |
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527 if (!comparison.empty()) |
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528 { |
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529 comparisons += " AND " + comparison; |
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530 } |
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531 |
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532 count ++; |
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533 } |
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534 } |
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535 |
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536 sql = ("SELECT " + |
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537 FormatLevel(queryLevel) + ".publicId, " + |
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538 FormatLevel(queryLevel) + ".internalId" + |
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539 " FROM Resources AS " + FormatLevel(queryLevel)); |
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540 |
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541 for (int level = queryLevel - 1; level >= upperLevel; level--) |
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542 { |
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543 sql += (" INNER JOIN Resources " + |
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544 FormatLevel(static_cast<ResourceType>(level)) + " ON " + |
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545 FormatLevel(static_cast<ResourceType>(level)) + ".internalId=" + |
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546 FormatLevel(static_cast<ResourceType>(level + 1)) + ".parentId"); |
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547 } |
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548 |
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549 for (int level = queryLevel + 1; level <= lowerLevel; level++) |
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550 { |
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551 sql += (" INNER JOIN Resources " + |
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552 FormatLevel(static_cast<ResourceType>(level)) + " ON " + |
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553 FormatLevel(static_cast<ResourceType>(level - 1)) + ".internalId=" + |
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554 FormatLevel(static_cast<ResourceType>(level)) + ".parentId"); |
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555 } |
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556 |
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557 std::list<std::string> where; |
5256 | 558 where.push_back(FormatLevel(queryLevel) + ".resourceType = " + |
559 formatter.FormatResourceType(queryLevel) + comparisons); | |
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560 |
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561 if (!labels.empty()) |
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562 { |
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563 /** |
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564 * "In SQL Server, NOT EXISTS and NOT IN predicates are the best |
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565 * way to search for missing values, as long as both columns in |
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566 * question are NOT NULL." |
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567 * https://explainextended.com/2009/09/15/not-in-vs-not-exists-vs-left-join-is-null-sql-server/ |
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568 **/ |
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569 |
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570 std::list<std::string> formattedLabels; |
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571 for (std::set<std::string>::const_iterator it = labels.begin(); it != labels.end(); ++it) |
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572 { |
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573 formattedLabels.push_back(formatter.GenerateParameter(*it)); |
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574 } |
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575 |
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576 std::string condition; |
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577 switch (labelsConstraint) |
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578 { |
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579 case LabelsConstraint_Any: |
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580 condition = "> 0"; |
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581 break; |
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582 |
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583 case LabelsConstraint_All: |
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584 condition = "= " + boost::lexical_cast<std::string>(labels.size()); |
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585 break; |
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586 |
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587 case LabelsConstraint_None: |
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588 condition = "= 0"; |
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589 break; |
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590 |
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591 default: |
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592 throw OrthancException(ErrorCode_ParameterOutOfRange); |
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593 } |
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594 |
5256 | 595 where.push_back("(SELECT COUNT(1) FROM Labels AS selectedLabels WHERE selectedLabels.id = " + FormatLevel(queryLevel) + |
596 ".internalId AND selectedLabels.label IN (" + Join(formattedLabels, "", ", ") + ")) " + condition); | |
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597 } |
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598 |
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599 sql += joins + Join(where, " WHERE ", " AND "); |
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600 |
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601 if (limit != 0) |
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602 { |
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603 sql += " LIMIT " + boost::lexical_cast<std::string>(limit); |
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604 } |
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605 } |
5422 | 606 |
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607 |
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608 void ISqlLookupFormatter::Apply(std::string& sql, |
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609 ISqlLookupFormatter& formatter, |
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610 const FindRequest& request) |
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611 { |
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612 const bool escapeBrackets = formatter.IsEscapeBrackets(); |
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613 ResourceType queryLevel = request.GetLevel(); |
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614 const std::string& strQueryLevel = FormatLevel(queryLevel); |
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615 |
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616 ResourceType lowerLevel, upperLevel; |
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617 GetLookupLevels(lowerLevel, upperLevel, queryLevel, request.GetDicomTagConstraints()); |
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618 |
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619 assert(upperLevel <= queryLevel && |
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620 queryLevel <= lowerLevel); |
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621 |
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622 std::string ordering = "row_number() over (order by " + strQueryLevel + ".publicId) as rowNumber"; // we need a default ordering in order to make default queries repeatable when using since&limit |
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623 |
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624 |
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625 sql = ("SELECT " + |
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626 strQueryLevel + ".publicId, " + |
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627 strQueryLevel + ".internalId, " + |
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628 ordering + |
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629 " FROM Resources AS " + strQueryLevel); |
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630 |
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631 |
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632 std::string joins, comparisons; |
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633 |
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634 if (request.GetOrthancIdentifiers().IsDefined() && request.GetOrthancIdentifiers().DetectLevel() <= queryLevel) |
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635 { |
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636 // single child resource matching, there should not be other constraints (at least for now) |
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637 assert(request.GetDicomTagConstraints().GetSize() == 0); |
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638 assert(request.GetLabels().size() == 0); |
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639 assert(request.HasLimits() == false); |
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640 |
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641 ResourceType topParentLevel = request.GetOrthancIdentifiers().DetectLevel(); |
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642 const std::string& strTopParentLevel = FormatLevel(topParentLevel); |
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643 |
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644 comparisons = " AND " + strTopParentLevel + ".publicId = " + formatter.GenerateParameter(request.GetOrthancIdentifiers().GetLevel(topParentLevel)); |
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645 |
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646 for (int level = queryLevel; level > topParentLevel; level--) |
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647 { |
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648 sql += (" INNER JOIN Resources " + |
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649 FormatLevel(static_cast<ResourceType>(level - 1)) + " ON " + |
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650 FormatLevel(static_cast<ResourceType>(level - 1)) + ".internalId=" + |
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651 FormatLevel(static_cast<ResourceType>(level)) + ".parentId"); |
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652 } |
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653 } |
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654 else |
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655 { |
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656 size_t count = 0; |
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657 |
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658 const DatabaseConstraints& dicomTagsConstraints = request.GetDicomTagConstraints(); |
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659 for (size_t i = 0; i < dicomTagsConstraints.GetSize(); i++) |
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660 { |
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661 const DatabaseConstraint& constraint = dicomTagsConstraints.GetConstraint(i); |
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662 |
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663 std::string comparison; |
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664 |
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665 if (FormatComparison(comparison, formatter, constraint, count, escapeBrackets)) |
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666 { |
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667 std::string join; |
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668 FormatJoin(join, constraint, count); |
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669 joins += join; |
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670 |
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671 if (!comparison.empty()) |
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672 { |
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673 comparisons += " AND " + comparison; |
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674 } |
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675 |
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676 count ++; |
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677 } |
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678 } |
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679 } |
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680 |
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681 for (int level = queryLevel - 1; level >= upperLevel; level--) |
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682 { |
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683 sql += (" INNER JOIN Resources " + |
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684 FormatLevel(static_cast<ResourceType>(level)) + " ON " + |
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685 FormatLevel(static_cast<ResourceType>(level)) + ".internalId=" + |
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686 FormatLevel(static_cast<ResourceType>(level + 1)) + ".parentId"); |
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687 } |
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688 |
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689 for (int level = queryLevel + 1; level <= lowerLevel; level++) |
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690 { |
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691 sql += (" INNER JOIN Resources " + |
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692 FormatLevel(static_cast<ResourceType>(level)) + " ON " + |
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693 FormatLevel(static_cast<ResourceType>(level - 1)) + ".internalId=" + |
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694 FormatLevel(static_cast<ResourceType>(level)) + ".parentId"); |
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695 } |
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696 |
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697 std::list<std::string> where; |
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698 where.push_back(strQueryLevel + ".resourceType = " + |
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699 formatter.FormatResourceType(queryLevel) + comparisons); |
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700 |
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701 |
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702 if (!request.GetLabels().empty()) |
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703 { |
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704 /** |
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705 * "In SQL Server, NOT EXISTS and NOT IN predicates are the best |
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706 * way to search for missing values, as long as both columns in |
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707 * question are NOT NULL." |
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708 * https://explainextended.com/2009/09/15/not-in-vs-not-exists-vs-left-join-is-null-sql-server/ |
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709 **/ |
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710 |
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711 const std::set<std::string>& labels = request.GetLabels(); |
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712 std::list<std::string> formattedLabels; |
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713 for (std::set<std::string>::const_iterator it = labels.begin(); it != labels.end(); ++it) |
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714 { |
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715 formattedLabels.push_back(formatter.GenerateParameter(*it)); |
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716 } |
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717 |
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718 std::string condition; |
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719 switch (request.GetLabelsConstraint()) |
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720 { |
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721 case LabelsConstraint_Any: |
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722 condition = "> 0"; |
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723 break; |
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724 |
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725 case LabelsConstraint_All: |
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726 condition = "= " + boost::lexical_cast<std::string>(labels.size()); |
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727 break; |
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728 |
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729 case LabelsConstraint_None: |
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730 condition = "= 0"; |
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731 break; |
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732 |
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733 default: |
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734 throw OrthancException(ErrorCode_ParameterOutOfRange); |
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735 } |
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736 |
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737 where.push_back("(SELECT COUNT(1) FROM Labels AS selectedLabels WHERE selectedLabels.id = " + strQueryLevel + |
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738 ".internalId AND selectedLabels.label IN (" + Join(formattedLabels, "", ", ") + ")) " + condition); |
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739 } |
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740 |
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741 sql += joins + Join(where, " WHERE ", " AND "); |
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742 |
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743 if (request.HasLimits()) |
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744 { |
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745 sql += formatter.FormatLimits(request.GetLimitsSince(), request.GetLimitsCount()); |
5748
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746 } |
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747 } |
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748 |
5422 | 749 |
750 void ISqlLookupFormatter::ApplySingleLevel(std::string& sql, | |
751 ISqlLookupFormatter& formatter, | |
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752 const DatabaseConstraints& lookup, |
5422 | 753 ResourceType queryLevel, |
754 const std::set<std::string>& labels, | |
755 LabelsConstraint labelsConstraint, | |
756 size_t limit | |
757 ) | |
758 { | |
759 ResourceType lowerLevel, upperLevel; | |
760 GetLookupLevels(lowerLevel, upperLevel, queryLevel, lookup); | |
761 | |
762 assert(upperLevel == queryLevel && | |
763 queryLevel == lowerLevel); | |
764 | |
765 const bool escapeBrackets = formatter.IsEscapeBrackets(); | |
766 | |
767 std::vector<std::string> mainDicomTagsComparisons, dicomIdentifiersComparisons; | |
768 | |
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769 for (size_t i = 0; i < lookup.GetSize(); i++) |
5422 | 770 { |
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771 const DatabaseConstraint& constraint = lookup.GetConstraint(i); |
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772 |
5422 | 773 std::string comparison; |
774 | |
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775 if (FormatComparison2(comparison, formatter, constraint, escapeBrackets)) |
5422 | 776 { |
777 if (!comparison.empty()) | |
778 { | |
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779 if (constraint.IsIdentifier()) |
5422 | 780 { |
781 dicomIdentifiersComparisons.push_back(comparison); | |
782 } | |
783 else | |
784 { | |
785 mainDicomTagsComparisons.push_back(comparison); | |
786 } | |
787 } | |
788 } | |
789 } | |
790 | |
791 sql = ("SELECT publicId, internalId " | |
792 "FROM Resources " | |
793 "WHERE resourceType = " + formatter.FormatResourceType(queryLevel) | |
794 + " "); | |
795 | |
796 if (dicomIdentifiersComparisons.size() > 0) | |
797 { | |
798 for (std::vector<std::string>::const_iterator it = dicomIdentifiersComparisons.begin(); it < dicomIdentifiersComparisons.end(); ++it) | |
799 { | |
800 sql += (" AND internalId IN (SELECT id FROM DicomIdentifiers WHERE " + *it + ") "); | |
801 } | |
802 } | |
803 | |
804 if (mainDicomTagsComparisons.size() > 0) | |
805 { | |
806 for (std::vector<std::string>::const_iterator it = mainDicomTagsComparisons.begin(); it < mainDicomTagsComparisons.end(); ++it) | |
807 { | |
808 sql += (" AND internalId IN (SELECT id FROM MainDicomTags WHERE " + *it + ") "); | |
809 } | |
810 } | |
811 | |
812 if (!labels.empty()) | |
813 { | |
814 /** | |
815 * "In SQL Server, NOT EXISTS and NOT IN predicates are the best | |
816 * way to search for missing values, as long as both columns in | |
817 * question are NOT NULL." | |
818 * https://explainextended.com/2009/09/15/not-in-vs-not-exists-vs-left-join-is-null-sql-server/ | |
819 **/ | |
820 | |
821 std::list<std::string> formattedLabels; | |
822 for (std::set<std::string>::const_iterator it = labels.begin(); it != labels.end(); ++it) | |
823 { | |
824 formattedLabels.push_back(formatter.GenerateParameter(*it)); | |
825 } | |
826 | |
827 std::string condition; | |
828 std::string inOrNotIn; | |
829 switch (labelsConstraint) | |
830 { | |
831 case LabelsConstraint_Any: | |
832 condition = "> 0"; | |
833 inOrNotIn = "IN"; | |
834 break; | |
835 | |
836 case LabelsConstraint_All: | |
837 condition = "= " + boost::lexical_cast<std::string>(labels.size()); | |
838 inOrNotIn = "IN"; | |
839 break; | |
840 | |
841 case LabelsConstraint_None: | |
842 condition = "> 0"; | |
843 inOrNotIn = "NOT IN"; | |
844 break; | |
845 | |
846 default: | |
847 throw OrthancException(ErrorCode_ParameterOutOfRange); | |
848 } | |
849 | |
850 sql += (" AND internalId " + inOrNotIn + " (SELECT id" | |
851 " FROM (SELECT id, COUNT(1) AS labelsCount " | |
852 "FROM Labels " | |
853 "WHERE label IN (" + Join(formattedLabels, "", ", ") + ") GROUP BY id" | |
854 ") AS temp " | |
855 " WHERE labelsCount " + condition + ")"); | |
856 } | |
857 | |
858 if (limit != 0) | |
859 { | |
860 sql += " LIMIT " + boost::lexical_cast<std::string>(limit); | |
861 } | |
862 } | |
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863 } |