Rank Feature 字段类型
编辑Rank Feature 字段类型
编辑rank_feature 字段可以索引数字，以便稍后在使用 rank_feature 查询的查询中提升文档。
resp = client.indices.create(
index="my-index-000001",
mappings={
"properties": {
"pagerank": {
"type": "rank_feature"
},
"url_length": {
"type": "rank_feature",
"positive_score_impact": False
}
}
},
)
print(resp)
resp1 = client.index(
index="my-index-000001",
id="1",
document={
"pagerank": 8,
"url_length": 22
},
)
print(resp1)
resp2 = client.search(
index="my-index-000001",
query={
"rank_feature": {
"field": "pagerank"
}
},
)
print(resp2)
response = client.indices.create(
index: 'my-index-000001',
body: {
mappings: {
properties: {
pagerank: {
type: 'rank_feature'
},
url_length: {
type: 'rank_feature',
positive_score_impact: false
}
}
}
}
)
puts response
response = client.index(
index: 'my-index-000001',
id: 1,
body: {
pagerank: 8,
url_length: 22
}
)
puts response
response = client.search(
index: 'my-index-000001',
body: {
query: {
rank_feature: {
field: 'pagerank'
}
}
}
)
puts response
const response = await client.indices.create({
index: "my-index-000001",
mappings: {
properties: {
pagerank: {
type: "rank_feature",
},
url_length: {
type: "rank_feature",
positive_score_impact: false,
},
},
},
});
console.log(response);
const response1 = await client.index({
index: "my-index-000001",
id: 1,
document: {
pagerank: 8,
url_length: 22,
},
});
console.log(response1);
const response2 = await client.search({
index: "my-index-000001",
query: {
rank_feature: {
field: "pagerank",
},
},
});
console.log(response2);
PUT my-index-000001
{
"mappings": {
"properties": {
"pagerank": {
"type": "rank_feature"
},
"url_length": {
"type": "rank_feature",
"positive_score_impact": false
}
}
}
}
PUT my-index-000001/_doc/1
{
"pagerank": 8,
"url_length": 22
}
GET my-index-000001/_search
{
"query": {
"rank_feature": {
"field": "pagerank"
}
}
}
rank_feature 字段仅支持单值字段和严格正值。多值字段和负值将被拒绝。
rank_feature 字段不支持查询、排序或聚合。它们只能在 rank_feature 查询中使用。
rank_feature 字段仅保留 9 位有效位数以进行精度计算，这转换为大约 0.4% 的相对误差。
与得分负相关的 Rank Feature 应将 positive_score_impact 设置为 false（默认为 true）。这将被 rank_feature 查询用来修改评分公式，使其得分随着特征值的增加而降低而不是增加。例如，在网络搜索中，URL 长度是一个常用的特征，它与得分负相关。