return getList(OpenSearchUrlQueue.class, sessionId, null, 0, pollingFetchSize,
                SortBuilders.fieldSort(OpenSearchUrlQueue.WEIGHT).order(SortOrder.DESC),
                SortBuilders.fieldSort(CREATE_TIME).order(SortOrder.ASC));
    }

    /**
     * Saves the session state (currently not implemented).
     *
     * @param sessionId The session ID.

        if (QueryFieldConfig.SCORE_FIELD.equals(field) || QueryFieldConfig.DOC_SCORE_FIELD.equals(field)) {
            return SortBuilders.scoreSort().order(order);
        }
        return SortBuilders.fieldSort(field).order(order);
    }

    /**
     * Checks if the specified field is a search field.
     * Uses O(1) Set lookup for improved performance.
     * @param field The field name to check.

        assertObjectNotNull("field", field);
        if (fieldSortBuilderList == null) {
            fieldSortBuilderList = new ArrayList<>();
        }
        fieldSortBuilderList.add(SortBuilders.fieldSort(field).order(ascOrDesc ? SortOrder.ASC : SortOrder.DESC));
    }

    // ===================================================================================

        assertObjectNotNull("field", field);
        if (fieldSortBuilderList == null) {
            fieldSortBuilderList = new ArrayList<>();
        }
        fieldSortBuilderList.add(SortBuilders.fieldSort(field).order(ascOrDesc ? SortOrder.ASC : SortOrder.DESC));
    }

    // ===================================================================================

        assertObjectNotNull("field", field);
        if (fieldSortBuilderList == null) {
            fieldSortBuilderList = new ArrayList<>();
        }
        fieldSortBuilderList.add(SortBuilders.fieldSort(field).order(ascOrDesc ? SortOrder.ASC : SortOrder.DESC));
    }

    // ===================================================================================

                            flist.toArray(new FunctionScoreQueryBuilder.FilterFunctionBuilder[flist.size()]))
                    .boostMode(CombineFunction.MULTIPLY));
            reader.addSort(SortBuilders.fieldSort(fessConfig.getIndexFieldClickCount()));
            reader.addSort(SortBuilders.scoreSort());
            return reader;
        }, docPerReq, () -> {
            systemHelper.calibrateCpuLoad();

        if (QueryFieldConfig.SCORE_FIELD.equals(field) || QueryFieldConfig.DOC_SCORE_FIELD.equals(field)) {
            return SortBuilders.scoreSort().order(order);
        }
        return SortBuilders.fieldSort(field).order(order);
    }

    /**
     * Sets the prefix used for highlight field names in search results.
     *
     * @param highlightPrefix the prefix string to use for highlight fields
     */