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annotate Framework/PostgreSQL/PostgreSQLLargeObject.h @ 522:c49136b34891 large-queries tip

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use a prepared statement for InsertOrUpdateMetadata
author Alain Mazy <am@orthanc.team>
date Fri, 05 Jul 2024 09:15:54 +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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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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23
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24 #pragma once
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25
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26 #if ORTHANC_ENABLE_POSTGRESQL != 1
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27 # error PostgreSQL support must be enabled to use this file
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28 #endif
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30 #include "PostgreSQLDatabase.h"
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32 #include <libpq-fe.h>
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34 namespace OrthancDatabases
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35 {
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36 class PostgreSQLLargeObject : public boost::noncopyable
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37 {
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38 private:
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39 class Reader;
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40
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41 PostgreSQLDatabase& database_;
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42 Oid oid_;
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43
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44 void Create();
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45
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46 void Write(const void* data,
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47 size_t size);
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48
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49 public:
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50 // This constructor is used to deal with "InputFileValue"
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51 PostgreSQLLargeObject(PostgreSQLDatabase& database,
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52 const std::string& s);
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53
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54 std::string GetOid() const;
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55
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56 static void ReadWhole(std::string& target,
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57 PostgreSQLDatabase& database,
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58 const std::string& oid);
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60 static void ReadRange(std::string& target,
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61 PostgreSQLDatabase& database,
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62 const std::string& oid,
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63 uint64_t start,
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64 size_t size);
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66 static void Delete(PostgreSQLDatabase& database,
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67 const std::string& oid);
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68 };
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70 }