Incorrect output result of "aggs" query - elasticsearch

Question

I have a query that searches the number of entries in a given datetime window (i.e. between 2017-02-17T15:00:00.000 and 2017-02-17T16:00:00.000). When I execute this query, I get the incorrect result (it's better said that the result is unexpected):
POST /myindex/_search
{
"size": 0,
"aggs": {
"range": {
"date_range": {
"field": "Datetime",
"ranges": [
{ "to": "2017-02-17T16:00:00||-1H/H" },
{ "from": "2017-02-17T16:00:00||/H" }
]
}
}
}
}
This is the output:
{
"took": 0,
"timed_out": false,
"_shards": {
"total": 5,
"successful": 5,
"failed": 0
},
"hits": {
"total": 11,
"max_score": 0,
"hits": []
},
"aggregations": {
"range": {
"buckets": [
{
"key": "*-2017-02-17T15:00:00.000Z",
"to": 1487343600000,
"to_as_string": "2017-02-17T15:00:00.000Z",
"doc_count": 0
},
{
"key": "2017-02-17T16:00:00.000Z-*",
"from": 1487347200000,
"from_as_string": "2017-02-17T16:00:00.000Z",
"doc_count": 0
}
]
}
}
}
In myindex I have two entries with the following values of Datetime:
2017-02-17T15:15:00.000Z
2017-02-17T15:02:00.000Z
So, the result should be equal to 2.
I don't understand how to interpret the current output. Which fields defines the number of entries?
UPDATE:
data structure:
PUT /myindex
{
"mappings": {
"intensity": {
"_all": {
"enabled": false
},
"properties": {
"Country_Id": {
"type":"keyword"
},
"Datetime": {
"type":"date"
}
}
}
}
}
sample data:
{
"took": 0,
"timed_out": false,
"_shards": {
"total": 5,
"successful": 5,
"failed": 0
},
"hits": {
"total": 5,
"max_score": 1,
"hits": [
{
"_index": "myindex",
"_type": "intensity",
"_id": "4",
"_score": 1,
"_source": {
"Country_Id": "1",
"Datetime": "2017-02-18T15:01:00.000Z"
}
},
{
"_index": "myindex",
"_type": "intensity",
"_id": "6",
"_score": 1,
"_source": {
"Country_Id": "1",
"Datetime": "2017-03-16T16:15:00.000Z"
}
},
{
"_index": "myindex",
"_type": "intensity",
"_id": "1",
"_score": 1,
"_source": {
"Country_Id": "1",
"Datetime": "2017-02-17T15:15:00.000Z"
}
},
{
"_index": "myindex",
"_type": "intensity",
"_id": "7",
"_score": 1,
"_source": {
"Country_Id": "1",
"Datetime": "2017-03-16T16:18:00.000Z"
}
},
{
"_index": "myindex",
"_type": "intensity",
"_id": "3",
"_score": 1,
"_source": {
"Country_Id": "1",
"Datetime": "2017-02-17T15:02:00.000Z"
}
}
]
}
}
The answer that I get:
{
"took": 2,
"timed_out": false,
"_shards": {
"total": 5,
"successful": 5,
"failed": 0
},
"hits": {
"total": 11,
"max_score": 0,
"hits": []
},
"aggregations": {
"range": {
"buckets": [
{
"key": "2017-02-17T15:00:00.000Z-2017-02-17T16:00:00.000Z",
"from": 1487343600000,
"from_as_string": "2017-02-17T15:00:00.000Z",
"to": 1487347200000,
"to_as_string": "2017-02-17T16:00:00.000Z",
"doc_count": 0
}
]
}
}
}

Answer 1

Your ranges are wrong, do it like this instead
POST /myindex/_search
{
"size": 0,
"aggs": {
"range": {
"date_range": {
"field": "Datetime",
"ranges": [
{
"from": "2017-02-17T16:00:00Z||-1H/H",
"to": "2017-02-17T16:00:00Z||/H"
}
]
}
}
}
}