presto-kudu/src/main/java/io/prestosql/plugin/kudu/KuduMetadata.java/KuduMetadata/addColumn
class KuduMetadata:    @Override
    public void addColumn(ConnectorSession session, ConnectorTableHandle tableHandle, ColumnMetadata column)
    {
        KuduTableHandle kuduTableHandle = (KuduTableHandle) tableHandle;
        clientSession.addColumn(kuduTableHandle.getSchemaTableName(), column);
    }