Crylia/EinsatzplanQT
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FINALLY DONE

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Crylia
2024-07-09 01:19:22 +02:00
parent 68b18e12e0
commit 4a475458d0
3 changed files with 129 additions and 84 deletions
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157
script.sql
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@@ -44,8 +44,8 @@ CREATE TABLE IF NOT EXISTS Veranstalter(
CREATE TABLE IF NOT EXISTS StundeImPlan (
uhrzeit INTEGER REFERENCES Uhrzeit(ID),
tag INTEGER NOT NULL,
veranstaltung VARCHAR(3) REFERENCES Veranstaltung(name),
veranstalter INTEGER REFERENCES Veranstalter(ID),
veranstaltung VARCHAR(3) REFERENCES Veranstaltung(name) ON DELETE SET NULL,
veranstalter INTEGER REFERENCES Veranstalter(ID) ON DELETE SET NULL,
PRIMARY KEY(uhrzeit, tag)
);
@@ -67,13 +67,11 @@ BEGIN
END;
$$ LANGUAGE plpgsql;
-- Trigger to call the above function
CREATE TRIGGER trg_delete_stundeimplan_for_veranstaltung
AFTER DELETE ON Veranstaltung
FOR EACH ROW
EXECUTE FUNCTION delete_stundeimplan_for_veranstaltung();
-- Function to update StundeImPlan when Veranstalter is deleted
CREATE OR REPLACE FUNCTION update_stundeimplan_for_veranstalter()
RETURNS TRIGGER AS $$
DECLARE
@@ -131,16 +129,32 @@ BEGIN
FOR u_row IN SELECT * FROM Uhrzeit LOOP
-- Loop through each available Veranstaltung
FOR v_row IN SELECT * FROM Veranstaltung WHERE used_in_plan = 0 LOOP
-- Find an available Veranstalter
-- Find an available Veranstalter with matching ort and not scheduled in the same tag and uhrzeit
SELECT * INTO available_veranstalter
FROM Veranstalter
WHERE arbeitszeit + v_row.dauer <= 18
ORDER BY arbeitszeit ASC
FROM Veranstalter v
WHERE v.arbeitszeit + v_row.dauer <= 18
AND NOT EXISTS (
SELECT 1
FROM StundeImPlan sp
JOIN Veranstaltung va ON sp.veranstaltung = va.name
WHERE sp.uhrzeit = u_row.ID
AND sp.tag = random_day
AND sp.veranstalter = v.ID
)
AND NOT EXISTS (
SELECT 1
FROM StundeImPlan prev_sp
JOIN Veranstaltung prev_va ON prev_sp.veranstaltung = prev_va.name
WHERE prev_sp.uhrzeit = u_row.ID - 1
AND prev_sp.tag = random_day
AND prev_sp.veranstalter = v.ID
AND prev_va.ort <> v_row.ort -- Ensure different ort for previous hour
)
ORDER BY v.arbeitszeit ASC
LIMIT 1;
IF FOUND THEN
-- Check if there is already an event scheduled for this tag and uhrzeit combination
random_day = random_between_days();
IF NOT EXISTS (
SELECT 1
@@ -154,6 +168,25 @@ BEGIN
-- Update the used_in_plan flag and arbeitszeit
UPDATE Veranstaltung SET used_in_plan = used_in_plan + 1 WHERE name = v_row.name;
UPDATE Veranstalter SET arbeitszeit = arbeitszeit + v_row.dauer WHERE ID = available_veranstalter.ID;
-- If the duration is 4, also insert for the next time slot
IF v_row.dauer = 4 THEN
-- Ensure the next time slot is within the range
IF EXISTS (SELECT 1 FROM Uhrzeit WHERE ID = u_row.ID + 1) THEN
-- Check if the next time slot is free
IF NOT EXISTS (
SELECT 1
FROM StundeImPlan
WHERE uhrzeit = u_row.ID + 1 AND tag = random_day
) THEN
INSERT INTO StundeImPlan (uhrzeit, tag, veranstaltung, veranstalter)
VALUES (u_row.ID + 1, random_day, v_row.name, available_veranstalter.ID);
-- Mark the second part as used in the plan
UPDATE Veranstaltung SET used_in_plan = used_in_plan + 1 WHERE name = v_row.name;
END IF;
END IF;
END IF;
END IF;
END IF;
END LOOP;
@@ -161,7 +194,6 @@ BEGIN
RETURN NEW;
END;
$$ LANGUAGE plpgsql;
CREATE TRIGGER trg_generate_plan
AFTER INSERT ON Veranstaltung
FOR EACH STATEMENT
@@ -173,7 +205,7 @@ DECLARE
new_veranstalter_id INTEGER;
v_name VARCHAR(3);
BEGIN
-- Find a new veranstalter for the same stundeImPlan
-- Find the name of the Veranstaltung for the same stundeImPlan
SELECT veranstaltung.name INTO v_name
FROM Veranstaltung
WHERE name = (SELECT veranstaltung FROM StundeImPlan WHERE uhrzeit = NEW.stundeImPlan_uhrzeit AND tag = NEW.stundeImPlan_tag);
@@ -185,12 +217,12 @@ BEGIN
WHERE sp.uhrzeit = NEW.stundeImPlan_uhrzeit - 1
AND sp.tag = NEW.stundeImPlan_tag
)
SELECT ID INTO new_veranstalter_id
SELECT v.ID INTO new_veranstalter_id
FROM Veranstalter v
JOIN StundeImPlan sp ON v.ID = sp.veranstalter
JOIN Veranstaltung va ON sp.veranstaltung = va.name
LEFT JOIN PreviousHour ph ON sp.uhrzeit = NEW.stundeImPlan_uhrzeit AND sp.tag = NEW.stundeImPlan_tag - 1
WHERE arbeitszeit + (SELECT dauer FROM Veranstaltung WHERE name = v_name) <= 18
LEFT JOIN PreviousHour ph ON v.ID = ph.veranstalter
WHERE v.arbeitszeit + (SELECT dauer FROM Veranstaltung WHERE name = v_name) <= 18
AND NOT EXISTS (
SELECT 1
FROM Krank k
@@ -198,30 +230,34 @@ BEGIN
AND k.stundeImPlan_uhrzeit = NEW.stundeImPlan_uhrzeit
AND k.stundeImPlan_tag = NEW.stundeImPlan_tag
)
AND (ph.veranstalter IS NULL OR v.ID <> ph.veranstalter OR va.ort = ph.ort)
ORDER BY arbeitszeit ASC
AND (ph.veranstalter IS NULL OR ph.veranstalter <> (
SELECT v.ID
FROM Veranstalter v
JOIN StundeImPlan sp ON v.ID = sp.veranstalter
JOIN Veranstaltung vaa ON sp.veranstaltung = vaa.name
WHERE sp.uhrzeit = NEW.stundeImPlan_uhrzeit
AND sp.tag = NEW.stundeImPlan_tag
AND vaa.ort = va.ort
))
ORDER BY v.arbeitszeit ASC
LIMIT 1;
SELECT ID INTO new_veranstalter_id
FROM Veranstalter v
WHERE arbeitszeit + (SELECT dauer FROM Veranstaltung WHERE name = v_name) <= 18
AND NOT EXISTS (
SELECT 1
FROM Krank k
WHERE k.veranstalter = v.ID
AND k.stundeImPlan_uhrzeit = NEW.stundeImPlan_uhrzeit
AND k.stundeImPlan_tag = NEW.stundeImPlan_tag
);
-- Check if a new veranstalter was found
IF new_veranstalter_id IS NOT NULL THEN
UPDATE Veranstalter
SET arbeitszeit = arbeitszeit + (SELECT dauer FROM Veranstaltung WHERE name = v_name)
WHERE ID = new_veranstalter_id;
UPDATE Veranstalter
SET arbeitszeit = arbeitszeit + (SELECT dauer FROM Veranstaltung WHERE name = v_name)
WHERE ID = new_veranstalter_id;
-- Update the StundeImPlan with the replacement or NULL
UPDATE StundeImPlan
SET veranstalter = COALESCE(new_veranstalter_id, NULL)
WHERE uhrzeit = NEW.stundeImPlan_uhrzeit AND tag = NEW.stundeImPlan_tag;
-- Update the StundeImPlan with the replacement
UPDATE StundeImPlan
SET veranstalter = new_veranstalter_id
WHERE uhrzeit = NEW.stundeImPlan_uhrzeit AND tag = NEW.stundeImPlan_tag;
ELSE
-- If no suitable veranstalter is found, set veranstalter to NULL
UPDATE StundeImPlan
SET veranstalter = NULL
WHERE uhrzeit = NEW.stundeImPlan_uhrzeit AND tag = NEW.stundeImPlan_tag;
END IF;
RETURN NEW;
END;
@@ -232,6 +268,57 @@ AFTER INSERT ON Krank
FOR EACH ROW
EXECUTE FUNCTION handle_krank_insert();
CREATE OR REPLACE FUNCTION handle_veranstalter_deletion() RETURNS TRIGGER AS $$
DECLARE
new_veranstalter RECORD;
affected_row RECORD;
BEGIN
FOR affected_row IN
SELECT * FROM StundeImPlan WHERE veranstalter = OLD.id
LOOP
-- Find a new suitable Veranstalter
SELECT * INTO new_veranstalter
FROM Veranstalter v
WHERE v.arbeitszeit + (SELECT dauer FROM Veranstaltung va WHERE va.name = affected_row.veranstaltung) <= 18
AND NOT EXISTS (
SELECT 1
FROM Krank k
WHERE k.veranstalter = v.ID
AND k.stundeImPlan_uhrzeit = affected_row.uhrzeit
AND k.stundeImPlan_tag = affected_row.tag
)
AND NOT EXISTS (
SELECT 1
FROM StundeImPlan sp
JOIN Veranstaltung va ON sp.veranstaltung = va.name
WHERE sp.uhrzeit = affected_row.uhrzeit - 1
AND sp.tag = affected_row.tag
AND sp.veranstalter = v.ID
AND va.ort <> (SELECT ort FROM Veranstaltung WHERE name = affected_row.veranstaltung)
)
AND v.ID <> affected_row.veranstalter
ORDER BY v.arbeitszeit ASC
LIMIT 1;
UPDATE StundeImPlan
SET veranstalter = new_veranstalter.ID
WHERE uhrzeit = affected_row.uhrzeit AND tag = affected_row.tag AND veranstalter = OLD.id;
UPDATE Veranstalter
SET arbeitszeit = arbeitszeit + (SELECT dauer FROM Veranstaltung WHERE name = affected_row.veranstaltung)
WHERE ID = new_veranstalter.ID;
END LOOP;
RETURN OLD;
END;
$$ LANGUAGE plpgsql;
CREATE TRIGGER before_veranstalter_delete
BEFORE DELETE ON Veranstalter
FOR EACH ROW
EXECUTE FUNCTION handle_veranstalter_deletion();
INSERT INTO Uhrzeit (anfangszeit, endzeit) VALUES
('08:00:00', '10:00:00'),
('10:00:00', '12:00:00'),