Mercurial > hg > orthanc-databases
annotate Framework/MySQL/MySQLResult.cpp @ 224:61c309e06797
added internal class DatabaseBackendAdapterV2::Adapter
| author | Sebastien Jodogne <s.jodogne@gmail.com> |
|---|---|
| date | Thu, 01 Apr 2021 16:09:59 +0200 |
| parents | 3236894320d6 |
| children | c82c2cf84ae8 |
| 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) 2017-2021 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 "MySQLResult.h" | |
| 23 | |
| 152 | 24 #include <Logging.h> |
| 25 #include <OrthancException.h> | |
| 0 | 26 |
| 6 | 27 #include <errmsg.h> |
| 0 | 28 #include <mysqld_error.h> |
| 29 | |
| 30 namespace OrthancDatabases | |
| 31 { | |
| 32 void MySQLResult::Step() | |
| 33 { | |
| 34 int code = mysql_stmt_fetch(statement_.GetObject()); | |
| 35 | |
| 36 if (code == 1) | |
| 37 { | |
| 38 unsigned int error = mysql_errno(database_.GetObject()); | |
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39 |
| 0 | 40 if (error == 0) |
| 41 { | |
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42 // This case occurs in requests without a result (e.g. if the |
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43 // SQL request is not a SELECT) |
| 0 | 44 done_ = true; |
| 45 } | |
| 46 else if (error == CR_SERVER_GONE_ERROR || | |
| 47 error == CR_SERVER_LOST || | |
| 48 error == ER_QUERY_INTERRUPTED) | |
| 49 { | |
| 50 database_.LogError(); | |
| 51 throw Orthanc::OrthancException(Orthanc::ErrorCode_DatabaseUnavailable); | |
| 52 } | |
| 53 else | |
| 54 { | |
| 55 database_.LogError(); | |
| 56 throw Orthanc::OrthancException(Orthanc::ErrorCode_Database); | |
| 57 } | |
| 58 } | |
| 59 else | |
| 60 { | |
| 61 done_ = (code != 0 && | |
| 62 code != MYSQL_DATA_TRUNCATED); // Occurs if mysql_stmt_fetch_column() must be called | |
| 63 | |
| 64 FetchFields(); | |
| 65 } | |
| 66 } | |
| 67 | |
| 68 | |
| 69 IValue* MySQLResult::FetchField(size_t index) | |
| 70 { | |
| 71 return statement_.FetchResultField(index); | |
| 72 } | |
| 73 | |
| 74 | |
| 75 MySQLResult::MySQLResult(MySQLDatabase& db, | |
| 76 MySQLStatement& statement) : | |
| 77 database_(db), | |
| 78 statement_(statement) | |
| 79 { | |
| 80 // !!! https://dev.mysql.com/doc/refman/5.7/en/mysql-stmt-fetch.html | |
| 81 // https://gist.github.com/hoterran/6365915 | |
| 82 // https://github.com/hholzgra/connector-c-examples/blob/master/mysql_stmt_bind_result.c | |
| 83 | |
| 84 SetFieldsCount(statement_.GetResultFieldsCount()); | |
| 85 | |
| 86 Step(); | |
| 87 } | |
| 88 | |
| 89 | |
| 90 MySQLResult::~MySQLResult() | |
| 91 { | |
| 92 // Reset the statement for further use | |
| 93 if (mysql_stmt_reset(statement_.GetObject()) != 0) | |
| 94 { | |
| 95 LOG(ERROR) << "Cannot reset the statement, expect an error"; | |
| 96 } | |
| 97 } | |
| 98 | |
| 99 | |
| 100 void MySQLResult::Next() | |
| 101 { | |
| 102 if (IsDone()) | |
| 103 { | |
| 104 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); | |
| 105 } | |
| 106 else | |
| 107 { | |
| 108 Step(); | |
| 109 } | |
| 110 } | |
| 111 } |