Mercurial > hg > orthanc-databases
annotate Framework/MySQL/MySQLStatement.cpp @ 152:063aa53b5917
sync
| author | Sebastien Jodogne <s.jodogne@gmail.com> |
|---|---|
| date | Wed, 01 Jul 2020 08:54:32 +0200 |
| parents | 4cd7e45b671e |
| children | 275e14f57f1e |
| rev | line source |
|---|---|
| 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 | |
|
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5 * Copyright (C) 2017-2020 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 "MySQLStatement.h" | |
| 23 | |
| 24 #include "../Common/BinaryStringValue.h" | |
| 25 #include "../Common/FileValue.h" | |
| 26 #include "../Common/Integer64Value.h" | |
| 27 #include "../Common/NullValue.h" | |
| 28 #include "../Common/Utf8StringValue.h" | |
| 29 #include "MySQLResult.h" | |
| 30 | |
| 152 | 31 #include <Logging.h> |
| 32 #include <OrthancException.h> | |
| 0 | 33 |
| 34 #include <list> | |
| 35 #include <memory> | |
| 36 | |
| 37 namespace OrthancDatabases | |
| 38 { | |
| 39 class MySQLStatement::ResultField : public boost::noncopyable | |
| 40 { | |
| 41 private: | |
| 42 IValue* CreateIntegerValue(MYSQL_BIND& bind) const | |
| 43 { | |
| 44 if (length_ != buffer_.size()) | |
| 45 { | |
| 46 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError); | |
| 47 } | |
| 48 | |
| 49 switch (mysqlType_) | |
| 50 { | |
| 51 case MYSQL_TYPE_TINY: | |
| 52 if (bind.is_unsigned) | |
| 53 { | |
| 54 return new Integer64Value(*reinterpret_cast<const uint8_t*>(&buffer_[0])); | |
| 55 } | |
| 56 else | |
| 57 { | |
| 58 return new Integer64Value(*reinterpret_cast<const int8_t*>(&buffer_[0])); | |
| 59 } | |
| 60 | |
| 61 case MYSQL_TYPE_SHORT: | |
| 62 if (bind.is_unsigned) | |
| 63 { | |
| 64 return new Integer64Value(*reinterpret_cast<const uint16_t*>(&buffer_[0])); | |
| 65 } | |
| 66 else | |
| 67 { | |
| 68 return new Integer64Value(*reinterpret_cast<const int16_t*>(&buffer_[0])); | |
| 69 } | |
| 70 | |
| 71 break; | |
| 72 | |
| 73 case MYSQL_TYPE_LONG: | |
| 74 if (bind.is_unsigned) | |
| 75 { | |
| 76 return new Integer64Value(*reinterpret_cast<const uint32_t*>(&buffer_[0])); | |
| 77 } | |
| 78 else | |
| 79 { | |
| 80 return new Integer64Value(*reinterpret_cast<const int32_t*>(&buffer_[0])); | |
| 81 } | |
| 82 | |
| 83 break; | |
| 84 | |
| 85 case MYSQL_TYPE_LONGLONG: | |
| 86 if (bind.is_unsigned) | |
| 87 { | |
| 88 uint64_t value = *reinterpret_cast<const uint64_t*>(&buffer_[0]); | |
| 89 if (static_cast<uint64_t>(static_cast<int64_t>(value)) != value) | |
| 90 { | |
| 91 LOG(WARNING) << "Overflow in a 64 bit integer"; | |
| 92 } | |
| 93 | |
| 94 return new Integer64Value(static_cast<int64_t>(value)); | |
| 95 } | |
| 96 else | |
| 97 { | |
| 98 return new Integer64Value(*reinterpret_cast<const int64_t*>(&buffer_[0])); | |
| 99 } | |
| 100 | |
| 101 break; | |
| 102 | |
| 103 default: | |
| 104 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError); | |
| 105 } | |
| 106 } | |
| 107 | |
| 108 | |
| 109 enum enum_field_types mysqlType_; | |
| 110 ValueType orthancType_; | |
| 111 std::string buffer_; | |
| 112 my_bool isNull_; | |
| 113 my_bool isError_; | |
| 114 unsigned long length_; | |
| 115 | |
| 116 | |
| 117 public: | |
| 118 ResultField(const MYSQL_FIELD& field) : | |
| 119 mysqlType_(field.type) | |
| 120 { | |
| 121 // https://dev.mysql.com/doc/refman/8.0/en/c-api-data-structures.html | |
| 122 // https://dev.mysql.com/doc/refman/8.0/en/mysql-stmt-fetch.html => size of "buffer_" | |
| 123 switch (field.type) | |
| 124 { | |
| 125 case MYSQL_TYPE_TINY: | |
| 126 orthancType_ = ValueType_Integer64; | |
| 127 buffer_.resize(1); | |
| 128 break; | |
| 129 | |
| 130 case MYSQL_TYPE_SHORT: | |
| 131 orthancType_ = ValueType_Integer64; | |
| 132 buffer_.resize(2); | |
| 133 break; | |
| 134 | |
| 135 case MYSQL_TYPE_LONG: | |
| 136 orthancType_ = ValueType_Integer64; | |
| 137 buffer_.resize(4); | |
| 138 break; | |
| 139 | |
| 140 case MYSQL_TYPE_LONGLONG: | |
| 141 orthancType_ = ValueType_Integer64; | |
| 142 buffer_.resize(8); | |
| 143 break; | |
| 144 | |
| 145 case MYSQL_TYPE_STRING: | |
| 146 case MYSQL_TYPE_VAR_STRING: | |
| 147 case MYSQL_TYPE_BLOB: | |
| 148 // https://medium.com/@adamhooper/in-mysql-never-use-utf8-use-utf8mb4-11761243e434 | |
| 149 switch (field.charsetnr) | |
| 150 { | |
| 151 case 45: // utf8mb4_general_ci | |
| 152 case 46: // utf8mb4_bin | |
| 153 case 224: // utf8mb4_unicode_ci => RECOMMENDED collation | |
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154 case 255: // utf8mb4_0900_ai_ci => necessary for MySQL 8.0 |
| 0 | 155 // https://stackoverflow.com/questions/766809/whats-the-difference-between-utf8-general-ci-and-utf8-unicode-ci |
| 156 orthancType_ = ValueType_Utf8String; | |
| 157 break; | |
| 158 | |
| 159 case 63: | |
| 160 orthancType_ = ValueType_BinaryString; | |
| 161 break; | |
| 162 | |
| 163 default: | |
| 164 LOG(ERROR) << "Unsupported MySQL charset: " << field.charsetnr; | |
| 165 throw Orthanc::OrthancException(Orthanc::ErrorCode_NotImplemented); | |
| 166 } | |
| 167 | |
| 168 if (field.max_length > 0) | |
| 169 { | |
| 170 buffer_.resize(field.max_length); | |
| 171 } | |
| 172 | |
| 173 break; | |
| 174 | |
| 175 default: | |
| 176 LOG(ERROR) << "MYSQL_TYPE not implemented: " << field.type; | |
| 177 throw Orthanc::OrthancException(Orthanc::ErrorCode_NotImplemented); | |
| 178 } | |
| 179 } | |
| 180 | |
| 181 enum enum_field_types GetMysqlType() const | |
| 182 { | |
| 183 return mysqlType_; | |
| 184 } | |
| 185 | |
| 186 ValueType GetOrthancType() const | |
| 187 { | |
| 188 return orthancType_; | |
| 189 } | |
| 190 | |
| 191 void PrepareBind(MYSQL_BIND& bind) | |
| 192 { | |
| 193 memset(&bind, 0, sizeof(bind)); | |
| 194 | |
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195 isNull_ = false; |
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196 isError_ = false; |
| 0 | 197 length_ = 0; |
| 198 | |
| 199 bind.buffer_length = buffer_.size(); | |
| 200 bind.buffer_type = mysqlType_; | |
| 201 bind.is_null = &isNull_; | |
| 202 bind.length = &length_; | |
| 203 | |
| 204 if (buffer_.empty()) | |
| 205 { | |
| 206 // Only fetches the actual size of the field (*): | |
| 207 // mysql_stmt_fetch_column() must be invoked afterward | |
| 208 bind.buffer = 0; | |
| 209 } | |
| 210 else | |
| 211 { | |
| 212 bind.buffer = &buffer_[0]; | |
| 213 bind.error = &isError_; | |
| 214 } | |
| 215 } | |
| 216 | |
| 217 | |
| 218 IValue* FetchValue(MySQLDatabase& database, | |
| 219 MYSQL_STMT& statement, | |
| 220 MYSQL_BIND& bind, | |
| 221 unsigned int column) const | |
| 222 { | |
| 223 if (isError_) | |
| 224 { | |
| 225 throw Orthanc::OrthancException(Orthanc::ErrorCode_Database); | |
| 226 } | |
| 227 else if (isNull_) | |
| 228 { | |
| 229 return new NullValue; | |
| 230 } | |
| 231 else if (orthancType_ == ValueType_Integer64) | |
| 232 { | |
| 233 return CreateIntegerValue(bind); | |
| 234 } | |
| 235 else if (orthancType_ == ValueType_Utf8String || | |
| 236 orthancType_ == ValueType_BinaryString) | |
| 237 { | |
| 238 std::string tmp; | |
| 239 tmp.resize(length_); | |
| 240 | |
| 241 if (!tmp.empty()) | |
| 242 { | |
| 243 if (buffer_.empty()) | |
| 244 { | |
| 245 bind.buffer = &tmp[0]; | |
| 246 bind.buffer_length = tmp.size(); | |
| 247 | |
| 248 database.CheckErrorCode(mysql_stmt_fetch_column(&statement, &bind, column, 0)); | |
| 249 } | |
| 250 else if (tmp.size() <= buffer_.size()) | |
| 251 { | |
| 252 memcpy(&tmp[0], &buffer_[0], length_); | |
| 253 } | |
| 254 else | |
| 255 { | |
| 256 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError); | |
| 257 } | |
| 258 } | |
| 259 | |
| 260 if (orthancType_ == ValueType_Utf8String) | |
| 261 { | |
| 262 return new Utf8StringValue(tmp); | |
| 263 } | |
| 264 else | |
| 265 { | |
| 266 return new BinaryStringValue(tmp); | |
| 267 } | |
| 268 } | |
| 269 else | |
| 270 { | |
| 271 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError); | |
| 272 } | |
| 273 } | |
| 274 }; | |
| 275 | |
| 276 | |
| 277 class MySQLStatement::ResultMetadata : public boost::noncopyable | |
| 278 { | |
| 279 private: | |
| 280 MYSQL_RES* metadata_; | |
| 281 | |
| 282 public: | |
| 283 ResultMetadata(MySQLDatabase& db, | |
| 284 MySQLStatement& statement) : | |
| 285 metadata_(NULL) | |
| 286 { | |
| 287 metadata_ = mysql_stmt_result_metadata(statement.GetObject()); | |
| 288 } | |
| 289 | |
| 290 ~ResultMetadata() | |
| 291 { | |
| 292 if (metadata_ != NULL) | |
| 293 { | |
| 294 mysql_free_result(metadata_); | |
| 295 } | |
| 296 } | |
| 297 | |
| 298 bool HasFields() const | |
| 299 { | |
| 300 return metadata_ != NULL; | |
| 301 } | |
| 302 | |
| 303 size_t GetFieldsCount() | |
| 304 { | |
| 305 if (HasFields()) | |
| 306 { | |
| 307 return mysql_num_fields(metadata_); | |
| 308 } | |
| 309 else | |
| 310 { | |
| 311 return 0; | |
| 312 } | |
| 313 } | |
| 314 | |
| 315 MYSQL_RES* GetObject() | |
| 316 { | |
| 317 return metadata_; | |
| 318 } | |
| 319 }; | |
| 320 | |
| 321 | |
| 322 void MySQLStatement::Close() | |
| 323 { | |
| 324 for (size_t i = 0; i < result_.size(); i++) | |
| 325 { | |
| 326 if (result_[i] != NULL) | |
| 327 { | |
| 328 delete result_[i]; | |
| 329 } | |
| 330 } | |
| 331 | |
| 332 if (statement_ != NULL) | |
| 333 { | |
| 334 mysql_stmt_close(statement_); | |
| 335 statement_ = NULL; | |
| 336 } | |
| 337 } | |
| 338 | |
| 339 | |
| 340 MySQLStatement::MySQLStatement(MySQLDatabase& db, | |
| 341 const Query& query) : | |
| 342 db_(db), | |
| 343 readOnly_(query.IsReadOnly()), | |
| 344 statement_(NULL), | |
| 345 formatter_(Dialect_MySQL) | |
| 346 { | |
| 347 std::string sql; | |
| 348 query.Format(sql, formatter_); | |
| 349 | |
| 350 statement_ = mysql_stmt_init(db.GetObject()); | |
| 351 if (statement_ == NULL) | |
| 352 { | |
| 353 db.LogError(); | |
| 354 throw Orthanc::OrthancException(Orthanc::ErrorCode_Database); | |
| 355 } | |
| 356 | |
| 357 LOG(INFO) << "Preparing MySQL statement: " << sql; | |
| 358 | |
| 359 db_.CheckErrorCode(mysql_stmt_prepare(statement_, sql.c_str(), sql.size())); | |
| 360 | |
| 361 if (mysql_stmt_param_count(statement_) != formatter_.GetParametersCount()) | |
| 362 { | |
| 363 Close(); | |
| 364 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError); | |
| 365 } | |
| 366 | |
| 367 try | |
| 368 { | |
| 369 ResultMetadata result(db, *this); | |
| 370 | |
| 371 if (result.HasFields()) | |
| 372 { | |
| 373 MYSQL_FIELD *field; | |
| 374 while ((field = mysql_fetch_field(result.GetObject()))) | |
| 375 { | |
| 376 result_.push_back(new ResultField(*field)); | |
| 377 } | |
| 378 } | |
| 379 | |
| 380 if (result_.size() != result.GetFieldsCount()) | |
| 381 { | |
| 382 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError); | |
| 383 } | |
| 384 } | |
| 385 catch (Orthanc::OrthancException&) | |
| 386 { | |
| 387 Close(); | |
| 388 throw; | |
| 389 } | |
| 390 | |
| 391 if (query.IsReadOnly()) | |
| 392 { | |
| 393 unsigned long type = (unsigned long) CURSOR_TYPE_READ_ONLY; | |
| 394 mysql_stmt_attr_set(statement_, STMT_ATTR_CURSOR_TYPE, (void*) &type); | |
| 395 } | |
| 396 } | |
| 397 | |
| 398 | |
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399 MySQLStatement::~MySQLStatement() |
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400 { |
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401 try |
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402 { |
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403 Close(); |
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404 } |
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405 catch (Orthanc::OrthancException&) |
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406 { |
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407 // Ignore possible exceptions due to connection loss |
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408 } |
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409 } |
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410 |
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411 |
| 0 | 412 MYSQL_STMT* MySQLStatement::GetObject() |
| 413 { | |
| 414 if (statement_ == NULL) | |
| 415 { | |
| 416 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); | |
| 417 } | |
| 418 else | |
| 419 { | |
| 420 return statement_; | |
| 421 } | |
| 422 } | |
| 423 | |
| 424 | |
| 425 IValue* MySQLStatement::FetchResultField(size_t i) | |
| 426 { | |
| 427 if (i >= result_.size()) | |
| 428 { | |
| 429 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange); | |
| 430 } | |
| 431 else | |
| 432 { | |
| 433 assert(result_[i] != NULL); | |
| 434 return result_[i]->FetchValue(db_, *statement_, outputs_[i], i); | |
| 435 } | |
| 436 } | |
| 437 | |
| 438 | |
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439 IResult* MySQLStatement::Execute(ITransaction& transaction, |
| 0 | 440 const Dictionary& parameters) |
| 441 { | |
| 442 std::list<int> intParameters; | |
| 443 std::list<long long int> int64Parameters; | |
| 444 | |
| 445 std::vector<MYSQL_BIND> inputs(formatter_.GetParametersCount()); | |
| 446 | |
| 447 for (size_t i = 0; i < inputs.size(); i++) | |
| 448 { | |
| 449 memset(&inputs[i], 0, sizeof(MYSQL_BIND)); | |
| 450 | |
| 451 const std::string& name = formatter_.GetParameterName(i); | |
| 452 if (!parameters.HasKey(name)) | |
| 453 { | |
| 454 LOG(ERROR) << "Missing required parameter in a SQL query: " << name; | |
| 455 throw Orthanc::OrthancException(Orthanc::ErrorCode_InexistentItem); | |
| 456 } | |
| 457 | |
| 458 ValueType type = formatter_.GetParameterType(i); | |
| 459 | |
| 460 const IValue& value = parameters.GetValue(name); | |
| 461 if (value.GetType() != type) | |
| 462 { | |
| 463 LOG(ERROR) << "Bad type of argument provided to a SQL query: " << name; | |
| 464 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadParameterType); | |
| 465 } | |
| 466 | |
| 467 // https://dev.mysql.com/doc/refman/8.0/en/c-api-prepared-statement-type-codes.html | |
| 468 switch (type) | |
| 469 { | |
| 470 case ValueType_Integer64: | |
| 471 { | |
| 472 int64Parameters.push_back(dynamic_cast<const Integer64Value&>(value).GetValue()); | |
| 473 inputs[i].buffer = &int64Parameters.back(); | |
| 474 inputs[i].buffer_type = MYSQL_TYPE_LONGLONG; | |
| 475 break; | |
| 476 } | |
| 477 | |
| 478 case ValueType_Utf8String: | |
| 479 { | |
| 480 const std::string& utf8 = dynamic_cast<const Utf8StringValue&>(value).GetContent(); | |
| 481 inputs[i].buffer = const_cast<char*>(utf8.c_str()); | |
| 482 inputs[i].buffer_length = utf8.size(); | |
| 483 inputs[i].buffer_type = MYSQL_TYPE_STRING; | |
| 484 break; | |
| 485 } | |
| 486 | |
| 487 case ValueType_BinaryString: | |
| 488 { | |
| 489 const std::string& content = dynamic_cast<const BinaryStringValue&>(value).GetContent(); | |
| 490 inputs[i].buffer = const_cast<char*>(content.c_str()); | |
| 491 inputs[i].buffer_length = content.size(); | |
| 492 inputs[i].buffer_type = MYSQL_TYPE_BLOB; | |
| 493 break; | |
| 494 } | |
| 495 | |
| 496 case ValueType_File: | |
| 497 { | |
| 498 const std::string& content = dynamic_cast<const FileValue&>(value).GetContent(); | |
| 499 inputs[i].buffer = const_cast<char*>(content.c_str()); | |
| 500 inputs[i].buffer_length = content.size(); | |
| 501 inputs[i].buffer_type = MYSQL_TYPE_BLOB; | |
| 502 break; | |
| 503 } | |
| 504 | |
| 505 case ValueType_Null: | |
| 506 { | |
| 507 inputs[i].buffer = NULL; | |
| 508 inputs[i].buffer_type = MYSQL_TYPE_NULL; | |
| 509 break; | |
| 510 } | |
| 511 | |
| 512 default: | |
| 513 throw Orthanc::OrthancException(Orthanc::ErrorCode_NotImplemented); | |
| 514 } | |
| 515 } | |
| 516 | |
| 517 if (!inputs.empty()) | |
| 518 { | |
| 519 db_.CheckErrorCode(mysql_stmt_bind_param(statement_, &inputs[0])); | |
| 520 } | |
| 521 | |
| 522 db_.CheckErrorCode(mysql_stmt_execute(statement_)); | |
| 523 | |
| 524 outputs_.resize(result_.size()); | |
| 525 | |
| 526 for (size_t i = 0; i < result_.size(); i++) | |
| 527 { | |
| 528 assert(result_[i] != NULL); | |
| 529 result_[i]->PrepareBind(outputs_[i]); | |
| 530 } | |
| 531 | |
| 532 if (!outputs_.empty()) | |
| 533 { | |
| 534 db_.CheckErrorCode(mysql_stmt_bind_result(statement_, &outputs_[0])); | |
| 535 db_.CheckErrorCode(mysql_stmt_store_result(statement_)); | |
| 536 } | |
| 537 | |
| 538 return new MySQLResult(db_, *this); | |
| 539 } | |
| 540 | |
| 541 | |
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b2ff1cd2907a
handling of implicit transactions in DatabaseManager
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
9
diff
changeset
|
542 void MySQLStatement::ExecuteWithoutResult(ITransaction& transaction, |
| 0 | 543 const Dictionary& parameters) |
| 544 { | |
| 545 std::auto_ptr<IResult> dummy(Execute(transaction, parameters)); | |
| 546 } | |
| 547 } |