35 lines
1.4 KiB
PL/PgSQL
35 lines
1.4 KiB
PL/PgSQL
-- ══════════════════════════════════════════════════════════════════════════════
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-- MIGRATIE v3: Globale schooljaren
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-- Uitvoeren op bestaande installaties die al draaien.
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-- Commando: docker exec -i leerdoelen_db psql -U leerdoelen leerdoelen < migrate_v3_global_years.sql
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-- ══════════════════════════════════════════════════════════════════════════════
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BEGIN;
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-- 1. school_id nullable maken (was NOT NULL)
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ALTER TABLE school_years ALTER COLUMN school_id DROP NOT NULL;
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-- 2. Unieke constraint op label (elk schooljaar bestaat maar één keer)
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DO $$
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BEGIN
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IF NOT EXISTS (
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SELECT 1 FROM pg_constraint WHERE conname = 'school_years_label_key'
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) THEN
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ALTER TABLE school_years ADD CONSTRAINT school_years_label_key UNIQUE (label);
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END IF;
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END $$;
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-- 3. Bestaande per-school jaren omzetten naar globale jaren
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-- (dubbele labels samenvoegen: bewaar het actieve, verwijder de rest)
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DELETE FROM school_years sy1
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USING school_years sy2
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WHERE sy1.label = sy2.label
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AND sy1.id > sy2.id;
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UPDATE school_years SET school_id = NULL;
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COMMIT;
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-- Controleer resultaat:
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SELECT id, label, is_active, school_id FROM school_years ORDER BY label DESC;
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