ELK range 范围过滤

gt : >

lt : <

gte : >=

lte : <=

POST /lib4/items/_bulk
{"index":{"_id":1}}
{"price":40,"itemID":"ID100123"}
{"index":{"_id":2}}
{"price":50,"itemID":"ID100124"}
{"index":{"_id":3}}
{"price":25,"itemID":"ID100124"}
{"index":{"_id":4}}
{"price":30,"itemID":"ID100125"}
{"index":{"_id":5}}
{"price":null,"itemID":"ID100127"}

//  查询价格在 20 到 50 之间的文档

GET /lib4/items/_search
{
 "post_filter": {
    "range":{
      "price":{
        "gt": 20,
        "lt":50
      }
    }
 }
}