@Override
    public List<SpanBo> selectTransactionMetadata(TransactionId transactionId) {
        final List<SpanBo> selectedSpans = traceDao.selectSpan(transactionId);
        populateAgentName(selectedSpans);
        return selectedSpans;
    }
Queries for details on dots selected from the scatter chart.
web/src/main/java/com/navercorp/pinpoint/web/service/ScatterChartServiceImpl.java