Mercurial > hg > orthanc-databases
annotate Framework/PostgreSQL/PostgreSQLResult.cpp @ 70:e6c13ddd26d9 db-changes
all integration tests passing with LookupResources extension
author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Thu, 03 Jan 2019 14:04:46 +0100 |
parents | 714c5d2bee76 |
children | 9263b3de37ed |
rev | line source |
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0 | 1 /** |
2 * Orthanc - A Lightweight, RESTful DICOM Store | |
3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics | |
4 * Department, University Hospital of Liege, Belgium | |
67 | 5 * Copyright (C) 2017-2019 Osimis S.A., Belgium |
0 | 6 * |
7 * This program is free software: you can redistribute it and/or | |
8 * modify it under the terms of the GNU Affero General Public License | |
9 * as published by the Free Software Foundation, either version 3 of | |
10 * the License, or (at your option) any later version. | |
11 * | |
12 * This program is distributed in the hope that it will be useful, but | |
13 * WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 * Affero General Public License for more details. | |
16 * | |
17 * You should have received a copy of the GNU Affero General Public License | |
18 * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
19 **/ | |
20 | |
21 | |
22 #include "PostgreSQLResult.h" | |
23 | |
24 #include "../Common/BinaryStringValue.h" | |
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25 #include "../Common/FileValue.h" |
0 | 26 #include "../Common/Integer64Value.h" |
27 #include "../Common/NullValue.h" | |
28 #include "../Common/Utf8StringValue.h" | |
29 | |
59 | 30 #include <pg_config.h> |
31 | |
32 #if PG_VERSION_NUM >= 110000 | |
33 # include <postgres.h> | |
34 # undef LOG // This one comes from <postgres.h>, and conflicts with <Core/Logging.h> | |
35 #endif | |
36 | |
0 | 37 #include <Core/OrthancException.h> |
38 #include <Core/Logging.h> | |
39 | |
40 #include <cassert> | |
41 #include <boost/lexical_cast.hpp> | |
42 | |
43 // PostgreSQL includes | |
44 #include <libpq-fe.h> | |
45 #include <c.h> | |
46 #include <catalog/pg_type.h> | |
47 | |
48 #include <Core/Endianness.h> | |
49 | |
50 | |
51 namespace OrthancDatabases | |
52 { | |
53 void PostgreSQLResult::Clear() | |
54 { | |
55 if (result_ != NULL) | |
56 { | |
57 PQclear(reinterpret_cast<PGresult*>(result_)); | |
58 result_ = NULL; | |
59 } | |
60 } | |
61 | |
62 | |
63 void PostgreSQLResult::CheckDone() | |
64 { | |
65 if (position_ >= PQntuples(reinterpret_cast<PGresult*>(result_))) | |
66 { | |
67 // We are at the end of the result set | |
68 Clear(); | |
69 } | |
70 } | |
71 | |
72 | |
73 void PostgreSQLResult::CheckColumn(unsigned int column, unsigned int /*Oid*/ expectedType) const | |
74 { | |
75 if (IsDone()) | |
76 { | |
77 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); | |
78 } | |
79 | |
80 if (column >= static_cast<unsigned int>(PQnfields(reinterpret_cast<PGresult*>(result_)))) | |
81 { | |
82 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange); | |
83 } | |
84 | |
85 if (expectedType != 0 && | |
86 expectedType != PQftype(reinterpret_cast<PGresult*>(result_), column)) | |
87 { | |
88 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadParameterType); | |
89 } | |
90 } | |
91 | |
92 | |
93 PostgreSQLResult::PostgreSQLResult(PostgreSQLStatement& statement) : | |
94 position_(0), | |
95 database_(statement.GetDatabase()) | |
96 { | |
97 result_ = statement.Execute(); | |
98 assert(result_ != NULL); // An exception would have been thrown otherwise | |
99 | |
100 // This is the first call to "Next()" | |
101 if (PQresultStatus(reinterpret_cast<PGresult*>(result_)) == PGRES_TUPLES_OK) | |
102 { | |
103 CheckDone(); | |
104 columnsCount_ = static_cast<unsigned int>(PQnfields(reinterpret_cast<PGresult*>(result_))); | |
105 } | |
106 else | |
107 { | |
108 // This is not a SELECT request, we're done | |
109 Clear(); | |
110 columnsCount_ = 0; | |
111 } | |
112 } | |
113 | |
114 | |
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115 PostgreSQLResult::~PostgreSQLResult() |
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116 { |
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117 try |
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118 { |
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119 Clear(); |
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120 } |
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121 catch (Orthanc::OrthancException&) |
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122 { |
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123 // Ignore possible exceptions due to connection loss |
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124 } |
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125 } |
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126 |
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127 |
0 | 128 void PostgreSQLResult::Next() |
129 { | |
130 position_++; | |
131 CheckDone(); | |
132 } | |
133 | |
134 | |
135 bool PostgreSQLResult::IsNull(unsigned int column) const | |
136 { | |
137 CheckColumn(column, 0); | |
138 return PQgetisnull(reinterpret_cast<PGresult*>(result_), position_, column) != 0; | |
139 } | |
140 | |
141 | |
142 bool PostgreSQLResult::GetBoolean(unsigned int column) const | |
143 { | |
144 CheckColumn(column, BOOLOID); | |
145 assert(PQfsize(reinterpret_cast<PGresult*>(result_), column) == 1); | |
146 const uint8_t *v = reinterpret_cast<const uint8_t*> | |
147 (PQgetvalue(reinterpret_cast<PGresult*>(result_), position_, column)); | |
148 return (v[0] != 0); | |
149 } | |
150 | |
151 | |
152 int PostgreSQLResult::GetInteger(unsigned int column) const | |
153 { | |
154 CheckColumn(column, INT4OID); | |
155 assert(PQfsize(reinterpret_cast<PGresult*>(result_), column) == 4); | |
156 char *v = PQgetvalue(reinterpret_cast<PGresult*>(result_), position_, column); | |
157 return htobe32(*reinterpret_cast<int32_t*>(v)); | |
158 } | |
159 | |
160 | |
161 int64_t PostgreSQLResult::GetInteger64(unsigned int column) const | |
162 { | |
163 CheckColumn(column, INT8OID); | |
164 assert(PQfsize(reinterpret_cast<PGresult*>(result_), column) == 8); | |
165 char *v = PQgetvalue(reinterpret_cast<PGresult*>(result_), position_, column); | |
166 return htobe64(*reinterpret_cast<int64_t*>(v)); | |
167 } | |
168 | |
169 | |
170 std::string PostgreSQLResult::GetString(unsigned int column) const | |
171 { | |
172 CheckColumn(column, 0); | |
173 | |
174 Oid oid = PQftype(reinterpret_cast<PGresult*>(result_), column); | |
175 if (oid != TEXTOID && oid != VARCHAROID && oid != BYTEAOID) | |
176 { | |
177 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadParameterType); | |
178 } | |
179 | |
180 return std::string(PQgetvalue(reinterpret_cast<PGresult*>(result_), position_, column)); | |
181 } | |
182 | |
183 | |
184 void PostgreSQLResult::GetLargeObject(std::string& result, | |
185 unsigned int column) const | |
186 { | |
187 CheckColumn(column, OIDOID); | |
188 | |
189 Oid oid; | |
190 assert(PQfsize(reinterpret_cast<PGresult*>(result_), column) == sizeof(oid)); | |
191 | |
192 oid = *(const Oid*) PQgetvalue(reinterpret_cast<PGresult*>(result_), position_, column); | |
193 oid = ntohl(oid); | |
194 | |
195 PostgreSQLLargeObject::Read(result, database_, boost::lexical_cast<std::string>(oid)); | |
196 } | |
197 | |
198 | |
199 void PostgreSQLResult::GetLargeObject(void*& result, | |
200 size_t& size, | |
201 unsigned int column) const | |
202 { | |
203 CheckColumn(column, OIDOID); | |
204 | |
205 Oid oid; | |
206 assert(PQfsize(reinterpret_cast<PGresult*>(result_), column) == sizeof(oid)); | |
207 | |
208 oid = *(const Oid*) PQgetvalue(reinterpret_cast<PGresult*>(result_), position_, column); | |
209 oid = ntohl(oid); | |
210 | |
211 PostgreSQLLargeObject::Read(result, size, database_, boost::lexical_cast<std::string>(oid)); | |
212 } | |
213 | |
214 | |
215 IValue* PostgreSQLResult::GetValue(unsigned int column) const | |
216 { | |
217 if (IsNull(column)) | |
218 { | |
219 return new NullValue; | |
220 } | |
221 | |
222 Oid type = PQftype(reinterpret_cast<PGresult*>(result_), column); | |
223 | |
224 switch (type) | |
225 { | |
226 case BOOLOID: | |
227 // Convert Boolean values as integers | |
228 return new Integer64Value(GetBoolean(column) ? 1 : 0); | |
229 | |
230 case INT4OID: | |
231 return new Integer64Value(GetInteger(column)); | |
232 | |
233 case INT8OID: | |
234 return new Integer64Value(GetInteger64(column)); | |
235 | |
236 case TEXTOID: | |
237 case VARCHAROID: | |
238 return new Utf8StringValue(GetString(column)); | |
239 | |
240 case BYTEAOID: | |
241 return new BinaryStringValue(GetString(column)); | |
242 | |
243 case OIDOID: | |
244 { | |
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245 std::auto_ptr<FileValue> value(new FileValue); |
0 | 246 GetLargeObject(value->GetContent(), column); |
247 return value.release(); | |
248 } | |
249 | |
250 default: | |
251 throw Orthanc::OrthancException(Orthanc::ErrorCode_NotImplemented); | |
252 } | |
253 } | |
254 } |