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# 10.3.10. `/db/_temp_view`

`POST` `/{db}/_temp_view`

  Creates (and executes) a temporary view based on the view function supplied in the JSON request.

  The arguments also available to standard view requests also apply to temporary views, but the execution of the view may take some time as it relies on being executed at the time of the request. This means that for every temporary view you create, the entire database will be read one doc at a time and passed through the view function.

  This should not be used on production CouchDB instances, and is purely a convenience function for quick development testing. You should use a defined view if you want to achieve the best performance.

  See /db/_design/design-doc/_view/view-name for more info.

  Request:

      POST /db/_temp_view?group=true HTTP/1.1
      Accept: application/json
      Content-Length: 92
      Content-Type: application/json
      Host: localhost:5984

      {
          "map": "function(doc) { if (doc.value) { emit(doc.value, null); } }",
          "reduce": "_count"
      }

  Response:

      HTTP/1.1 200 OK
      Cache-Control: must-revalidate
      Content-Type: application/json
      Date: Tue, 13 Aug 2013 12:28:12 GMT
      ETag: "AU33B3N7S9K4SAZSFA048HVB4"
      Server: CouchDB (Erlang/OTP)
      Transfer-Encoding: chunked

      {
          "rows": [
              {
                  "key": -10,
                  "value": 1
              },
              {
                  "key": 10,
                  "value": 2
              },
              {
                  "key": 15,
                  "value": 1
              }
          ]
      }

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