gistfile1.txt

{
  "query" : {
    "filtered": {
      "query": {
        "match_all": {}
      },
      "filter": {
        "bool": {
          "must": [
            {"term": {
              "courseUuid": "{{courseUuid}}"
            }}
          ]
        }
      }
    }
  },
  "size" : 0,
  "aggs" : {
    "{{field_name}}" : {
      "terms": {
        "field": "{{field_name}}",
        "size": 10000
      }, "aggs": {
        "{{time_interval}}": {
          "date_histogram": {
            "field": "time",
            "interval": "{{time_interval}}",
            "min_doc_count": 0
          }
        }
      }
    }
  }
}