elasticsearch之should查询
should查询在mysql中就好比是or或，但在es中使用should查询必须要和must一起使用才可以，相当于must[should A,should B],中文解释就好比是满足A或者是B条件的数据，如下这一段shoudl语句的大概意思是满足是用户A上传并且permission状态是private或者permission状态是public的
{
"bool" : {
"must" : [
{
"bool" : {
"should" : [
{
"bool" : {
"must" : [
{
"term" : {
"upload_user_name" : {
"value" : "用户A",
}
}
},
{
"term" : {
"permission" : {
"value" : "private",
"boost" : 1.0
}
}
}
]
}
},
{
"term" : {
"permission" : {
"value" : "public",
"boost" : 1.0
}
}
}
]
}
}
]
}
}
Java代码展现出来就是
这里使用的es版本是5.2
public void should(){
// 最外层bool
BoolQueryBuilder boolQueryBuilder = QueryBuilders.boolQuery();
// 使用should的bool
BoolQueryBuilder shouldBuilder= QueryBuilders.boolQuery();
BoolQueryBuilder must = QueryBuilders.boolQuery().must(QueryBuilders.termQuery(DocumentFieldEnum.upload_user_name.name(), "用户A")) .must(QueryBuilders.termQuery(DocumentFieldEnum.permission.name(), PermissionEnum.PRIVATE.getKey()));
shouldBuilder.should(must);
shouldBuilder.should(QueryBuilders.termQuery(DocumentFieldEnum.permission.name(), PermissionEnum.PUBLIC.getKey()));
boolQueryBuilder.must(shouldBuilder);
}
