以下是一个使用OpenSearch ScriptScoreQueryBuilder和BoolQueryBuilder进行knn脚本查询的示例:
import com.aliyun.opensearch.query.*;
// 创建一个KNN查询
KNNQuery knnQuery = new KNNQuery("my_vector_field", new float[] {1.0f, 2.0f, 3.0f}, 10);
// 创建一个脚本查询,用于计算每个文档的得分
String scriptCode = "cosineSimilarity(params.queryVector, doc['my_vector_field']) + 1.0";
ScriptScoreFunction scriptFunction = new ScriptScoreFunction(scriptCode);
ScriptScoreQueryBuilder scriptQuery = new ScriptScoreQueryBuilder(scriptFunction);
// 创建一个布尔查询,将KNN查询和脚本查询组合起来
BoolQueryBuilder boolQuery = QueryBuilders.bool()
.must(knnQuery)
.filter(scriptQuery);
// 构建搜索请求
SearchParams searchParams = new SearchParams(indexName);
searchParams.setQuery(boolQuery);
// 发送搜索请求并处理响应...