如何在索引elasticsearch java中查找类型中所有记录的计数

Question

I have started working recently working on elasticsearch in Java platform. I wanted to find out count of all documents inside type in specific index with help of Java without fetching all records. Found following ways to do this not sure which will be better choice.

• CountRequestBuilder (Deprecated in recent releases)
• prepareSearch with setsize set to 0.

• Using SearchType.COUNT while creating search.

  Little confused with above options. is there any better solution ? Thanks in advance.

Answer 1

You are looking for a simple aggregation over the field _type . Here is a JSON equivalent:

{   
"aggs": {
    "my_terms": {
       "terms": {
         "field": "_type"
       }
     }
  }
}