}

        // Assert deleteByQuery was NOT called due to exception in query building
        assertFalse(deleteByQueryCalled);
    }

    public void test_execute_withOutOfMemoryError() {
        // Create mock SearchEngineClient that throws OutOfMemoryError
        searchEngineClient = new SearchEngineClient() {
            @Override
            public long deleteByQuery(String index, QueryBuilder query) {

     */
    public SuggestDeleteResponse deleteByQuery(final String queryString) {
        return deleteByQuery(QueryBuilders.queryStringQuery(queryString).defaultOperator(Operator.AND));
    }

    /**
     * Deletes suggest items by a query builder.
     * @param queryBuilder The query builder.
     * @return The SuggestDeleteResponse.
     */
    public SuggestDeleteResponse deleteByQuery(final QueryBuilder queryBuilder) {

        }
        return result;
    }

    @Override
    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) {

        boolean result = SuggestUtil.deleteByQuery(client, settings, TEST_INDEX, QueryBuilders.termQuery("nonexistent", "value"));
        assertTrue(result); // Should still return true even with no matches
    }

    @Test(expected = SuggesterException.class)
    public void testDeleteByQueryWithInvalidIndex() {
        // Test delete with non-existent index

     */
    protected long deleteDocumentByQuery(final SearchEngineClient searchEngineClient, final String index, final QueryBuilder queryBuilder) {
        return searchEngineClient.deleteByQuery(index, queryBuilder);
    }

    /**
     * Retrieves a document from the search index by its ID.
     *
     * @param searchEngineClient the search engine client to use for retrieval

        boolQueryBuilder.mustNot(QueryBuilders.termQuery(FieldNames.KINDS, SuggestItem.Kind.USER.toString()));

        SuggestUtil.deleteByQuery(ComponentUtil.getSearchEngineClient(), suggester.settings(), suggester.getIndex(), boolQueryBuilder);
    }

    /**
     * Purges old suggest data from search logs.
     *

        final String docId = form.docId;
        try {
            final QueryBuilder query = QueryBuilders.termQuery(fessConfig.getIndexFieldDocId(), docId);
            searchEngineClient.deleteByQuery(fessConfig.getIndexDocumentUpdateIndex(), query);
            saveInfo(messages -> messages.addSuccessDeleteDocFromIndex(GLOBAL));
        } catch (final Exception e) {

     *
     * @param request The HTTP servlet request
     * @param params The search request parameters to identify documents to delete
     * @return Number of documents deleted
     */
    public long deleteByQuery(final HttpServletRequest request, final SearchRequestParams params) {
        final String query = ComponentUtil.getQueryStringBuilder().params(params).build();

    protected void deleteKeyFromArray(final String index, final String type, final String key) {
        final String actualIndex = index + "." + type.toLowerCase(Locale.ENGLISH);
        try {
            SuggestUtil.deleteByQuery(client, settings, actualIndex, QueryBuilders.termQuery(FieldNames.ARRAY_KEY, key));
        } catch (final Exception e) {
            throw new SuggestSettingsException("Failed to delete all from array.", e);
        }

     * @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 {
            SearchResponse response = client.prepareSearch(index)