ES的索引别名

 

https://cloud.tencent.com/developer/article/1122840

 

随机评分

https://www.elastic.co/guide/cn/elasticsearch/guide/current/random-scoring.html

 

https://www.programcreek.com/java-api-examples/?api=org.elasticsearch.index.query.functionscore.ScoreFunctionBuilders

 

constantScoreQuery

https://blog.csdn.net/u010882234/article/details/119521714

if (CollectionUtils.isNotEmpty(itemIdList)) {
                itemIdList = itemIdList.stream().distinct().collect(Collectors.toList());
                BoolQueryBuilder idBoolQueryBuilder = QueryBuilders.boolQuery();
                idBoolQueryBuilder.mustNot(QueryBuilders.termsQuery(ItemSearch.ID, itemIdList));
                // constant_score默认固定分数为1
                ConstantScoreQueryBuilder constantScoreQueryBuilder = QueryBuilders.constantScoreQuery(idBoolQueryBuilder);
                FunctionScoreQueryBuilder functionScoreQueryBuilder = QueryBuilders.functionScoreQuery(constantScoreQueryBuilder, builders).scoreMode(FunctionScoreQuery.ScoreMode.SUM)
                        .boostMode(CombineFunction.SUM);
                queryBuilder.withQuery(functionScoreQueryBuilder);
            }

 这代码是有问题的，constantScoreQuery无法实现，满足条件，加常量1分，即不能作为

FunctionScoreQueryBuilder使用。并且，这里的 idBoolQueryBuilder，会过滤掉查询结果！

 

Java Examples for org.elasticsearch.index.query.ConstantScoreQueryBuilder

https://www.javatips.net/api/org.elasticsearch.index.query.constantscorequerybuilder

 

Elasticsearch--java操作之QueryBuilders构建搜索Query
https://blog.csdn.net/weixin_42650954/article/details/117921101

 

write scripts

https://www.elastic.co/guide/en/elasticsearch/reference/current/modules-scripting-using.html