annotate Framework/Odbc/OdbcEnvironment.cpp @ 524:48aba35fe64e large-queries

merged BEGIN and SET TRANSACTION statements
author Alain Mazy <am@orthanc.team>
date Tue, 09 Jul 2024 16:30:52 +0200
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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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ecd0b719cff5 update year to 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 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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24 #include "OdbcEnvironment.h"
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25
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26 #include <Logging.h>
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27 #include <OrthancException.h>
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29 #include <boost/lexical_cast.hpp>
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30 #include <sqlext.h>
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33 namespace OrthancDatabases
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34 {
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35 OdbcEnvironment::OdbcEnvironment()
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36 {
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37 LOG(INFO) << "Creating the ODBC environment";
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39 /* Allocate an environment handle */
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40 if (!SQL_SUCCEEDED(SQLAllocHandle(SQL_HANDLE_ENV, SQL_NULL_HANDLE, &handle_)))
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41 {
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42 throw Orthanc::OrthancException(Orthanc::ErrorCode_Database,
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43 "Cannot create ODBC environment");
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44 }
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46 /* We want ODBC 3 support */
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47 if (!SQL_SUCCEEDED(SQLSetEnvAttr(handle_, SQL_ATTR_ODBC_VERSION, (void *) SQL_OV_ODBC3, 0)))
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48 {
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49 SQLFreeHandle(SQL_HANDLE_ENV, handle_);
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50 throw Orthanc::OrthancException(Orthanc::ErrorCode_Database,
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51 "Your environment doesn't support ODBC 3.x");
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52 }
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53 }
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56 OdbcEnvironment::~OdbcEnvironment()
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57 {
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58 LOG(INFO) << "Destructing the ODBC environment";
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59
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60 if (!SQL_SUCCEEDED(SQLFreeHandle(SQL_HANDLE_ENV, handle_)))
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61 {
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62 LOG(ERROR) << "Cannot tear down ODBC environment";
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63 }
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64 }
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67 std::string OdbcEnvironment::FormatError(SQLHANDLE handle,
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68 SQLSMALLINT type)
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69 {
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70 SQLINTEGER i = 0;
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71 SQLINTEGER native;
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72 SQLCHAR state[SQL_SQLSTATE_SIZE + 1];
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73 SQLCHAR text[256];
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74 SQLSMALLINT len;
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75
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76 std::string s;
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77
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78 for (;;)
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79 {
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80 SQLRETURN ret = SQLGetDiagRec(type, handle, ++i, state, &native, text, sizeof(text), &len);
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81 if (SQL_SUCCEEDED(ret))
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82 {
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83 if (i >= 2)
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84 {
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85 s += "\n";
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86 }
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87
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88 s += (std::string(reinterpret_cast<const char*>(state)) + " : " +
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89 boost::lexical_cast<std::string>(i) + "/" +
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90 boost::lexical_cast<std::string>(native) + " " +
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91 std::string(reinterpret_cast<const char*>(text)));
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92 }
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93 else
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94 {
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95 return s;
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96 }
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97 }
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98 }
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99
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100
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101 void OdbcEnvironment::GlobalInitialization()
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102 {
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103 /**
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104 * Explicitly inform the ODBC driver that the application is using
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105 * UTF-8, by making sure that default "C" locale is used. We are
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106 * in the scenario "ANSI application with a Unicode driver".
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107 * https://docs.microsoft.com/en-us/sql/connect/odbc/linux-mac/programming-guidelines
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108 * https://www.progress.com/tutorials/odbc/unicode
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109 **/
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110 setlocale(LC_ALL, "C");
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111 }
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112 }