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elasticSearch多类型搜索

发布时间：2021-08-31 23:14:12编辑：雪饮阅读（）

这里所说的elasticSearch的多类型搜索是指不限制类型。

首先看看这个文档

这里要搜索这个tags中的Good单词则有：
Get http://localhost:9200/schools/_search?q=tags:Good
请求正文：none
响应正文：
{
    "took": 2,
    "timed_out": false,
    "_shards": {
        "total": 1,
        "successful": 1,
        "skipped": 0,
        "failed": 0
    },
    "hits": {
        "total": {
            "value": 2,
            "relation": "eq"
        },
        "max_score": 0.79423964,
        "hits": [
            {
                "_index": "schools",
                "_type": "school",
                "_id": "2",
                "_score": 0.79423964,
                "_source": {
                    "name": "Saint Paul School",
                    "description": "ICSE Afiliation",
                    "street": "Dawarka",
                    "city": "Delhi",
                    "state": "Delhi",
                    "zip": "110075",
                    "location": [
                        28.5733056,
                        77.0122136
                    ],
                    "fees": 5000,
                    "tags": [
                        "Good Faculty",
                        "Great Sports"
                    ],
                    "rating": "4.5"
                }
            },
            {
                "_index": "schools",
                "_type": "school",
                "_id": "4",
                "_score": 0.79423964,
                "_source": {
                    "name": "Saint Paul School",
                    "description": "ICSE Afiliation",
                    "street": "Dawarka",
                    "city": "Delhi",
                    "state": "Delhi",
                    "zip": "110075",
                    "location": [
                        28.5733056,
                        77.0122136
                    ],
                    "fees": 5000,
                    "tags": [
                        "Good Faculty",
                        "Great Sports"
                    ],
                    "rating": "4.5"
                }
            }
        ]
    }
}
由于我这里id为2和id为4的文档内容都是一样的，所以就搜索出了两个条目。
那么这并不是多类型搜索的实际含义，这里这两个条目的映射都是school，那么所谓多类型在这里则就是schools索引下应该很多文档，而这些文档又都属于不同映射的，但是由于elasticsearch-7.14.0-windows-x86_64版本中新规定，一个索引下只能有一个映射，所以这个多类型搜索准确来说是针对一些支持多映射的老版本的。