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annotate PostgreSQL/Plugins/PostgreSQLDefinitions.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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22
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23
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24 #pragma once
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25
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26 #include <stdint.h>
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29 /**
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30 * This advisory lock is used if the "Lock" option is set to "true",
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31 * in order to prevent the execution of two PostgreSQL index plugins
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32 * on the same database.
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33 **/
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34 static const int32_t POSTGRESQL_LOCK_INDEX = 42;
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35
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36
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37 /**
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38 * This advisory lock is used if the "Lock" option is set to "true",
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39 * in order to prevent the execution of two PostgreSQL storage area
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40 * plugins on the same database.
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41 **/
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42 static const int32_t POSTGRESQL_LOCK_STORAGE = 43;
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45 /**
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46 * Transient advisory lock to protect the setup of the database,
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47 * because concurrent statements like "CREATE TABLE" are not protected
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48 * by transactions.
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49 * https://groups.google.com/d/msg/orthanc-users/yV3LSTh_TjI/h3PRApJFBAAJ
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50 **/
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51 static const int32_t POSTGRESQL_LOCK_DATABASE_SETUP = 44;
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53 /**
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54 * Transient advisory lock to protect the instance creation,
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55 * because it is not 100% resilient to concurrency in, e.g, READ COMIITED
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56 * transaction isolation level.
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57 **/
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58 static const int32_t POSTGRESQL_LOCK_CREATE_INSTANCE = 45;