final NodeSet nodeSet, final int axis) throws XPathException {
String[] ngrams = NGramSearch.getDistinctNGrams(query, index.getN());
// Nothing to search for? The find nothing.
if (ngrams.length == 0)
return new EmptyNodeSet();
String firstNgramm = ngrams[0];
LOG.trace("First NGRAM: " + firstNgramm);
NodeSet result = index.search(getExpressionId(), docs, qnames, firstNgramm, firstNgramm, context, nodeSet, axis);