第44节：初识搜索引擎_mapping复杂数据类型以及object类型数据底层结构大揭秘

课程大纲

 

1、multivalue field

 

{ "tags": [ "tag1", "tag2" ]}

 

建立索引时与string是一样的，数据类型不能混

 

2、empty field

 

null，[]，[null]

 

3、object field

 

PUT /company/employee/1

{

  "address": {

    "country": "china",

    "province": "guangdong",

    "city": "guangzhou"

  },

  "name": "jack",

  "age": 27,

  "join_date": "2017-01-01"

}

 

address：object类型

 

{

  "company": {

    "mappings": {

      "employee": {

        "properties": {

          "address": {

            "properties": {

              "city": {

                "type": "text",

                "fields": {

                  "keyword": {

                    "type": "keyword",

                    "ignore_above": 256

                  }

                }

              },

              "country": {

                "type": "text",

                "fields": {

                  "keyword": {

                    "type": "keyword",

                    "ignore_above": 256

                  }

                }

              },

              "province": {

                "type": "text",

                "fields": {

                  "keyword": {

                    "type": "keyword",

                    "ignore_above": 256

                  }

                }

              }

            }

          },

          "age": {

            "type": "long"

          },

          "join_date": {

            "type": "date"

          },

          "name": {

            "type": "text",

            "fields": {

              "keyword": {

                "type": "keyword",

                "ignore_above": 256

              }

            }

          }

        }

      }

    }

  }

}

 

{

  "address": {

    "country": "china",

    "province": "guangdong",

    "city": "guangzhou"

  },

  "name": "jack",

  "age": 27,

  "join_date": "2017-01-01"

}

 

{

    "name":            [jack],

    "age":          [27],

    "join_date":      [2017-01-01],

    "address.country":         [china],

    "address.province":   [guangdong],

    "address.city":  [guangzhou]

}

 

{

    "authors": [

        { "age": 26, "name": "Jack White"},

        { "age": 55, "name": "Tom Jones"},

        { "age": 39, "name": "Kitty Smith"}

    ]

}

 

{

    "authors.age":    [26, 55, 39],

    "authors.name":   [jack, white, tom, jones, kitty, smith]

}