* @param q The query string.
     * @param fields The fields to search in.
     * @return The QueryBuilder instance.
     */
    protected QueryBuilder buildQuery(final String q, final List<String> fields) {
        try {
            final QueryBuilder queryBuilder;
            if (Strings.isNullOrEmpty(q)) {
                queryBuilder = QueryBuilders.matchAllQuery();
            } else {

        }
        this.limitOfDocumentSize = limitOfDocumentSize;
    }

    /**
     * Sets the query builder.
     * @param queryBuilder The query builder.
     */
    public void setQuery(final QueryBuilder queryBuilder) {
        this.queryBuilder = queryBuilder;
    }

    /**
     * Adds a sort builder.
     * @param sortBuilder The sort builder.
     */

    }

    @Override
    public SuggestWriterResult deleteByQuery(final Client client, final SuggestSettings settings, final String index,
            final QueryBuilder queryBuilder) {
        throw new UnsupportedOperationException("deleteByQuery is unsupported.");
    }

     * @param index the name of the index from which documents will be deleted
     * @param queryBuilder the query that defines which documents to delete
     * @return a result object containing information about the delete operation
     */
    SuggestWriterResult deleteByQuery(Client client, SuggestSettings settings, String index, QueryBuilder queryBuilder);

    /**
     * Merges an array of SuggestItem objects by combining items with the same ID.

     * @return The QueryBuilder instance.
     */
    protected QueryBuilder buildQuery() {
        final BoolQueryBuilder queryBuilder = QueryBuilders.boolQuery();
        queryBuilder.must(QueryBuilders.termQuery(FieldNames.KINDS, SuggestItem.Kind.QUERY.toString()));
        queryBuilder.mustNot(QueryBuilders.existsQuery(FieldNames.READING_PREFIX + "1"));

    public SuggestWriterResult deleteByQuery(final Client client, final SuggestSettings settings, final String index,
            final QueryBuilder queryBuilder) {
        final SuggestWriterResult result = new SuggestWriterResult();
        try {
            SuggestUtil.deleteByQuery(client, settings, index, queryBuilder);
        } catch (final Exception e) {
            result.addFailure(e);
        }
        return result;
    }

            final Integer size, final SortBuilder<?>... sortBuilders) {
        return getList(clazz, builder -> {
            if (StringUtil.isNotBlank(sessionId)) {
                if (queryBuilder instanceof BoolQueryBuilder) {
                    ((BoolQueryBuilder) queryBuilder).filter(QueryBuilders.termQuery(SESSION_ID, sessionId));

     * @param queryBuilder the query used to identify documents to delete
     * @return true if the operation completes successfully
     * @throws SuggesterException if any error occurs during the delete operation
     */
    public static boolean deleteByQuery(final Client client, final SuggestSettings settings, final String index,
            final QueryBuilder queryBuilder) {
        try {

        return getNum(QueryBuilders.rangeQuery(FieldNames.QUERY_FREQ).gte(1));
    }

    private long getNum(final QueryBuilder queryBuilder) {
        final SearchResponse searchResponse = client.prepareSearch()
                .setIndices(getSearchAlias(index))
                .setSize(0)
                .setQuery(queryBuilder)
                .setTrackTotalHits(true)
                .execute()

     * @param type The document type (deprecated).
     * @param queryBuilder The query to match documents for deletion.
     * @return The number of deleted documents.
     * @throws OpenSearchAccessException if the deletion fails.
     */
    public int deleteByQuery(final String index, final String type, final QueryBuilder queryBuilder) {
        SearchResponse response =