• 时间:
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前言

  • 本文对 Elasticsearch 8.19 适用

试验

  • 创建索引
PUT /tech_docs
{
  "mappings": {
    "properties": {
      "title": {
        "type": "text"
      },
      "tags": {
        "type": "keyword"
      },
      "views": {
        "type": "integer"
      },
      "vector_data": {
        "type": "sparse_vector"
      }
    }
  }
}
  • 写入样例数据
POST /tech_docs/_bulk
{ "index": { "_id": "1" } }
{ "title": "Introduction to Python", "tags": ["programming"], "views": 150, "vector_data": {"101": 2.5, "202": 1.2} }
{ "index": { "_id": "2" } }
{ "title": "Advanced Java Patterns", "tags": ["programming"], "views": 50, "vector_data": {"303": 3.1, "404": 0.8} }
{ "index": { "_id": "3" } }
{ "title": "Elasticsearch Sparse Vector Guide", "tags": ["search"], "views": 300, "vector_data": {"101": 0.5, "505": 2.9} }
{ "index": { "_id": "4" } }
{ "title": "Distributed Systems Basics", "tags": ["architecture"], "views": 200, "vector_data": {"606": 1.8, "707": 2.2} }
{ "index": { "_id": "5" } }
{ "title": "Machine Learning with PyTorch", "tags": ["ai"], "views": 80, "vector_data": {"101": 1.1, "808": 3.5} }
  • sparse_vector 与 filter 组合查询
GET /tech_docs/_search
{
  "query": {
    "bool": {
      "must": [
        {
          "sparse_vector": {
            "field": "vector_data",
            "query_vector": {
              "101": 1.0,
              "505": 2.0
            }
          }
        }
      ],
      "filter": [
        { "terms": { "tags": ["search", "programming"] } },
        { "range": { "views": { "gte": 100 } } }
      ]
    }
  }
}

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