elasticsearch-如何找到确切的日期类型值？

Question

So I'm using elasticsearch with spring framework, and I'm having trouble get hits by exact date value.

Here's my property mapping:

{
  "properties": {
    "creationDate": {
      "type": "date",
      "format": "dd-MM-yyyy HH:mm:ss"
    },
    ...
  }
}

Here's the mapping in the java class:

@Field(type =   Date, format = DateFormat.custom, pattern ="dd-MM-yyyy HH:mm:ss")
public Calendar creationDate;

The problem is when I try to search for an exact date:

GET test/searchableSo/_search
{
  "query": {
    "term": {
      "creationDate": {
        "value": "14-11-2014 05:55:46"
      }
    }
  }
}

It doesn't return anything, only if I use the long equivalent:

{
  "query": {
    "term": {
      "creationDate": {
        "value": "1415987746214"
      }
    }
  }
}

Any insight?

Answer 1

Usually it is safer to use the range filter instead of term/match when dealing with date fields.

Elasticsearch internally stores date type as a long value. So I believe passing 1415987746214 while indexing should end up storing the value as is.

Hence 1415987746214 is not the same as " 14-11-2014 05:55:46". because of the millisecond portion.

Try indexing it without the millisecond portion ie " 1415987746000 " or you could use the numeric_resolution setting to be seconds in the mapping and specify timestamp in seconds since epoch while indexing ie 1415987746

Example:

 "properties": { "creationDate": { "type": "date", "format": "dd-MM-yyyy HH:mm:ss" ,"numeric_resolution" : "seconds"},..}

either would work for the query :

{ "query": { "term": { "creationDate": { "value": "14-11-2014 17:55:46" } } } }

remember to use the 24 hour clock.