presto-jdbc/src/main/java/io/prestosql/jdbc/PrestoStatement.java/PrestoStatement/execute
class PrestoStatement:    @Override
    public boolean execute(String sql)
            throws SQLException
    {
        if (connection().shouldStartTransaction()) {
            internalExecute(connection().getStartTransactionSql());
        }
        return internalExecute(sql);
    }