// This file is autogenerated, DO NOT EDIT
// Use `node scripts/generate-docs-examples.js` to generate the docs examples

[source, js]
----
const response = await client.transform.previewTransform({
  source: {
    index: "kibana_sample_data_flights",
    query: {
      bool: {
        filter: [
          {
            term: {
              Cancelled: false,
            },
          },
        ],
      },
    },
  },
  dest: {
    index: "sample_flight_delays_by_carrier",
  },
  pivot: {
    group_by: {
      carrier: {
        terms: {
          field: "Carrier",
        },
      },
    },
    aggregations: {
      flights_count: {
        value_count: {
          field: "FlightNum",
        },
      },
      delay_mins_total: {
        sum: {
          field: "FlightDelayMin",
        },
      },
      flight_mins_total: {
        sum: {
          field: "FlightTimeMin",
        },
      },
      delay_time_percentage: {
        bucket_script: {
          buckets_path: {
            delay_time: "delay_mins_total.value",
            flight_time: "flight_mins_total.value",
          },
          script: "(params.delay_time / params.flight_time) * 100",
        },
      },
    },
  },
});
console.log(response);
----