elasticsearch - 为什么带括号和不带括号的 Elasticsearch 查询会给出不同的输出？

Question

我有 2 个下面的 Elasticsearch 查询

这给出了 5 个结果

POST twitter/object/_search
{

 "_source": false,
 "query": {
   "query_string": {
     "query": "Apple AND Orange OR Banana",
     "default_field": "content"
    }
  }
}

这给出了 12 个结果

POST twitter/object/_search
{

 "_source": false,
 "query": {
   "query_string": {
     "query": "(Apple AND Orange) OR Banana",
     "default_field": "content"
    }
  }
}

请帮我弄清楚为什么会这样。查询是如何解释的，因为逻辑上两个查询应该给出相同的输出？

Answer 1

来自 https://www.elastic.co/guide/en/elasticsearch/reference/current/query-dsl-query-string-query.html#_boolean_operators

The familiar boolean operators AND, OR and NOT are supported but beware that they do not honor the usual precedence rules, so parentheses should be used whenever multiple operators are used together.