presto-jmx/src/main/java/io/prestosql/plugin/jmx/JmxMetadata.java/JmxMetadata/getColumnHandles
class JmxMetadata:    @Override
    public Map<String, ColumnHandle> getColumnHandles(ConnectorSession session, ConnectorTableHandle tableHandle)
    {
        JmxTableHandle jmxTableHandle = (JmxTableHandle) tableHandle;
        return ImmutableMap.copyOf(Maps.uniqueIndex(jmxTableHandle.getColumnHandles(), column -> column.getColumnName().toLowerCase(ENGLISH)));
    }