xquery - 如何基于集合获取计数并在 XQuery 中使用多个元素词查询？

Question

试图根据不同的过滤器和一个集合来计算汽车的数量。即使我们看到多辆满足要求的汽车，查询仍返回计数 0。

fn:count(cts:search(fn:collection("com.cars"), cts:and-query((
    cts:element-word-query(xs:QName("exteriorColor"),  "red", "wildcarded" ),
    cts:element-word-query(xs:QName("interiorColor"),  "gray", "wildcarded" )
    cts:element-word-query(xs:QName("powerSteering"),  json:null(), "wildcarded" )
    ))))

测试数据：

{
      "id":1
      "carName":"Toyoto",
      "exteriorColor": "red",
      "interiorColor": "gray",
      "powerStreering": null
    }
    {
      "id":2
      "carName":"Toyoto",
      "exteriorColor": "blue",
      "interiorColor": "gray",
      "powerStreering": null
    }
    {
      "id":3
      "carName":"Toyoto",
      "exteriorColor": "red",
      "interiorColor": "gray",
      "powerStreering": "yes"
    }
    {
      "id":4
      "carName":"Toyoto",
      "exteriorColor": "white",
      "interiorColor": "gray",
      "powerStreering": null
    }
    {
      "id":5
      "carName":"Toyoto",
      "exteriorColor": "red",
      "interiorColor": "gray",
      "powerStreering": null
    } 

标签： xquerymarklogicmarklogic-8

Answer 1

您在cts:element-word-query需要使用时使用cts:json-property-word-query：https ://docs.marklogic.com/cts:json-property-word-query

要测试 null，我相信您应该使用：

cts:json-property-value-query("propertyName", json:null())