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‎databases/sem2/lab3/.~lock.1.odt#‎

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‎databases/sem2/lab3/1.odt‎

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‎databases/sem2/lab3/1.pdf‎

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‎databases/sem2/lab3/script.sql‎

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-- lab 1
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BEGIN;
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DROP TABLE IF EXISTS Event ;
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DROP TABLE IF EXISTS Object ;
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DROP TABLE IF EXISTS AvilableAction ;
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-- Создание таблиц
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CREATE TABLE Object
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(
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ObjectName TEXT PRIMARY KEY,
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IsGroup BOOLEAN NOT NULL DEFAULT FALSE
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);
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CREATE TABLE AvilableAction
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(
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ActionName TEXT PRIMARY KEY
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);
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CREATE TABLE Event
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(
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EventId SERIAL PRIMARY KEY,
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Action TEXT NOT NULL REFERENCES AvilableAction(ActionName),
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PreviousEvent INTEGER REFERENCES Event(EventId),
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Target TEXT REFERENCES Object(ObjectName),
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Initiator TEXT REFERENCES Object(ObjectName),
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CONSTRAINT EeitherTargetOrInitiator CHECK (Target IS NOT NULL OR Initiator IS NOT NULL)
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);
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-- Вставка объектов
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INSERT INTO Object(ObjectName, IsGroup)
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VALUES
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('Глупые питекантропы', TRUE),
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('Способные питекантропы', TRUE),
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('Мысли', FALSE),
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('Смотрящий на Луну', FALSE),
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('Кристалл', FALSE),
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('Видения', FALSE),
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('Щупальца', FALSE);
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-- Вставка действий
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INSERT INTO AvilableAction(ActionName)
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VALUES
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('Оставить в покое'),
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('Сосредоточить внимание'),
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('Почувствовать'),
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('Шариться в закаулках мозга'),
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('Начаться');
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-- Вставка событий
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INSERT INTO Event(Action, Target, Initiator, PreviousEvent)
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VALUES
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('Оставить в покое', 'Глупые питекантропы', 'Кристалл', NULL),
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('Сосредоточить внимание', 'Способные питекантропы', 'Кристалл', 1),
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('Почувствовать', 'Смотрящий на Луну', NULL, NULL),
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('Шариться в закаулках мозга', 'Смотрящий на Луну', 'Щупальца', 3),
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('Начаться', 'Смотрящий на Луну', NULL, 4);
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END;
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-- lab 3
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BEGIN;
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ALTER TABLE Event ADD PreviousAction TEXT REFERENCES AvilableAction(ActionName);
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/*
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CREATE OR REPLACE FUNCTION set_previous_action()
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RETURNS TRIGGER AS $$
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BEGIN
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IF NEW.PreviousEvent IS NOT NULL THEN
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SELECT Action INTO NEW.PreviousAction
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FROM Event
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WHERE EventId = NEW.PreviousEvent;
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ELSE
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NEW.PreviousAction := NULL;
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END IF;
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RETURN NEW;
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END;
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$$ LANGUAGE plpgsql;
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CREATE TRIGGER trigger_set_previous_action
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BEFORE INSERT OR UPDATE OF PreviousEvent
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ON Event
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FOR EACH ROW
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EXECUTE FUNCTION set_previous_action();
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*/
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CREATE OR REPLACE FUNCTION cascade_action_name_update()
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RETURNS TRIGGER AS $$
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BEGIN
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UPDATE Event
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SET PreviousAction = NEW.Action
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WHERE PreviousEvent = NEW.EventId;
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RETURN NULL;
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END;
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$$ LANGUAGE plpgsql;
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CREATE TRIGGER trigger_cascade_action_name_update
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AFTER UPDATE OF Action
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ON Event
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FOR EACH ROW
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EXECUTE FUNCTION cascade_action_name_update();
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END;
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-- tests
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BEGIN;
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INSERT INTO AvilableAction(ActionName)
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VALUES
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('Какое-то действие');
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INSERT INTO Event(Action, Target, Initiator, PreviousEvent)
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VALUES
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('Какое-то действие', 'Смотрящий на Луну', NULL, 4);
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UPDATE Event
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SET Action = 'Какое-то действие'
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WHERE Event.EventId = 1;
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END;

‎programming/sem2/lab5_v2/docs/client/Main.html‎

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<title>Main</title>
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<meta name="viewport" content="width=device-width, initial-scale=1">
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‎programming/sem2/lab5_v2/docs/client/allclasses-index.html‎

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<!-- Generated by javadoc (22) on Sun May 18 13:38:31 MSK 2025 -->
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<title>All Classes and Interfaces</title>
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<meta name="viewport" content="width=device-width, initial-scale=1">
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‎programming/sem2/lab5_v2/docs/client/allpackages-index.html‎

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<title>All Packages</title>
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‎programming/sem2/lab5_v2/docs/client/client/Main.html‎

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<title>Main</title>
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‎programming/sem2/lab5_v2/docs/client/client/commands/BasicCommand.html‎

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<title>BasicCommand</title>
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<meta name="viewport" content="width=device-width, initial-scale=1">
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‎programming/sem2/lab5_v2/docs/client/client/commands/exceptions/ElementNotFound.html‎

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<title>ElementNotFound</title>
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<meta name="viewport" content="width=device-width, initial-scale=1">
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8">

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