presto-jdbc/src/main/java/io/prestosql/jdbc/PrestoStatement.java/PrestoStatement/getStatementSessionProperties
class PrestoStatement:    private Map<String, String> getStatementSessionProperties()
    {
        ImmutableMap.Builder<String, String> sessionProperties = ImmutableMap.builder();
        if (queryTimeoutSeconds.get() > 0) {
            sessionProperties.put("query_max_run_time", queryTimeoutSeconds.get() + "s");
        }
        return sessionProperties.build();
    }