da2b32e877
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78 lines
3.3 KiB
PL/PgSQL
78 lines
3.3 KiB
PL/PgSQL
-- Charakter-Verknüpfungen auch bei DELETEs außerhalb der Worker bereinigen.
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-- Löscht bestehende verwaiste Beziehungen; vorher auf der Ziel-DB sichern.
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BEGIN;
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LOCK TABLE falukant_data.character, falukant_data.relationship,
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falukant_data.relationship_state, falukant_data.child_relation
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IN SHARE ROW EXCLUSIVE MODE;
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DELETE FROM falukant_data.relationship_state rs
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WHERE NOT EXISTS (
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SELECT 1 FROM falukant_data.relationship r WHERE r.id = rs.relationship_id
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)
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OR EXISTS (
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SELECT 1 FROM falukant_data.relationship r
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WHERE r.id = rs.relationship_id
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AND ((r.character1_id IS NOT NULL AND NOT EXISTS (
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SELECT 1 FROM falukant_data.character c WHERE c.id = r.character1_id))
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OR (r.character2_id IS NOT NULL AND NOT EXISTS (
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SELECT 1 FROM falukant_data.character c WHERE c.id = r.character2_id)))
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);
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DELETE FROM falukant_data.relationship r
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WHERE (r.character1_id IS NOT NULL AND NOT EXISTS (
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SELECT 1 FROM falukant_data.character c WHERE c.id = r.character1_id
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)) OR (r.character2_id IS NOT NULL AND NOT EXISTS (
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SELECT 1 FROM falukant_data.character c WHERE c.id = r.character2_id
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));
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DELETE FROM falukant_data.child_relation cr
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WHERE (cr.child_character_id IS NOT NULL AND NOT EXISTS (
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SELECT 1 FROM falukant_data.character c WHERE c.id = cr.child_character_id
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)) OR (cr.father_character_id IS NOT NULL AND NOT EXISTS (
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SELECT 1 FROM falukant_data.character c WHERE c.id = cr.father_character_id
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)) OR (cr.mother_character_id IS NOT NULL AND NOT EXISTS (
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SELECT 1 FROM falukant_data.character c WHERE c.id = cr.mother_character_id
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));
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-- Vorhandene einspaltige FKs ersetzen (deren Namen sind je nach Backend verschieden).
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-- Auch relationship_state absichern, damit es die Kaskade nicht blockieren kann.
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DO $$
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DECLARE
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target record;
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existing_fk record;
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BEGIN
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FOR target IN
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SELECT * FROM (VALUES
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('relationship', 'character1_id', 'character'),
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('relationship', 'character2_id', 'character'),
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('child_relation', 'child_character_id', 'character'),
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('child_relation', 'father_character_id', 'character'),
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('child_relation', 'mother_character_id', 'character'),
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('relationship_state', 'relationship_id', 'relationship')
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) AS targets(table_name, column_name, referenced_table)
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LOOP
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FOR existing_fk IN
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SELECT con.conname
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FROM pg_constraint con
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JOIN pg_attribute att ON att.attrelid = con.conrelid
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AND con.conkey = ARRAY[att.attnum]
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WHERE con.contype = 'f'
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AND con.conrelid = format('falukant_data.%I', target.table_name)::regclass
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AND con.confrelid = format('falukant_data.%I', target.referenced_table)::regclass
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AND att.attname = target.column_name
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LOOP
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EXECUTE format('ALTER TABLE falukant_data.%I DROP CONSTRAINT %I',
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target.table_name, existing_fk.conname);
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END LOOP;
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EXECUTE format(
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'ALTER TABLE falukant_data.%I ADD CONSTRAINT %I FOREIGN KEY (%I) REFERENCES falukant_data.%I (id) ON DELETE CASCADE',
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target.table_name, target.table_name || '_' || target.column_name || '_fkey',
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target.column_name, target.referenced_table);
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END LOOP;
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END;
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$$;
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COMMIT;
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