presto-kudu/src/main/java/io/prestosql/plugin/kudu/KuduRecordCursorWithVirtualRowId.java/KuduRecordCursorWithVirtualRowId/buildPrimaryKey
class KuduRecordCursorWithVirtualRowId:    private PartialRow buildPrimaryKey()
    {
        Schema schema = table.getSchema();
        PartialRow row = new PartialRow(schema);
        RowHelper.copyPrimaryKey(schema, currentRow, row);
        return row;
    }