21 lines
727 B
MySQL
21 lines
727 B
MySQL
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-- Enforce immutable tracecoin ledger: no UPDATE/DELETE allowed.
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CREATE OR REPLACE FUNCTION prevent_tracecoin_ledger_mutation()
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RETURNS trigger AS $$
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BEGIN
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RAISE EXCEPTION 'tracecoin_ledger is immutable; % is not allowed', TG_OP;
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END;
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$$ LANGUAGE plpgsql;
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DROP TRIGGER IF EXISTS trg_prevent_tracecoin_ledger_update ON tracecoin_ledger;
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CREATE TRIGGER trg_prevent_tracecoin_ledger_update
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BEFORE UPDATE ON tracecoin_ledger
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FOR EACH ROW
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EXECUTE FUNCTION prevent_tracecoin_ledger_mutation();
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DROP TRIGGER IF EXISTS trg_prevent_tracecoin_ledger_delete ON tracecoin_ledger;
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CREATE TRIGGER trg_prevent_tracecoin_ledger_delete
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BEFORE DELETE ON tracecoin_ledger
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FOR EACH ROW
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EXECUTE FUNCTION prevent_tracecoin_ledger_mutation();
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