}
final RangeIndex.Operator operator = getOperator();
try {
preselectResult = index.query(getExpressionId(), docs, contextSequence.toNodeSet(), qnames, keys, operator, NodeSet.DESCENDANT);
} catch (XPathException | IOException e) {
throw new XPathException(this, "Error while querying full text index: " + e.getMessage(), e);
}
//LOG.info("preselect for " + Arrays.toString(keys) + " on " + contextSequence.getItemCount() + "returned " + preselectResult.getItemCount() +
// " and took " + (System.currentTimeMillis() - start));