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elastic / eland

Python Client and Toolkit for DataFrames, Big Data, Machine Learning and ETL in Elasticsearch
https://eland.readthedocs.io
Apache License 2.0
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Fix fields missing from the result hits (fixes #692) #693

Closed bartbroere closed 4 weeks ago

bartbroere commented 1 month ago

This is a hotfix that solves the issues in our data warehouse. Some more work is needed to reproduce this issue with one of the test datasets. Also see the analysis in the related issue #692

To do:

Fixes #692

pquentin commented 1 month ago

buildkite test this please

pquentin commented 1 month ago

buildkite test this please

pquentin commented 1 month ago

buildkite test this please

bartbroere commented 1 month ago

Thanks for running this. I reformatted with black, and noticed that the ordering of the values in the Cities column is non-deterministic, so I'll need to address that as well.

pquentin commented 1 month ago

buildkite test this please

pquentin commented 1 month ago

Thanks. Would you mind pasting here a JSON response from Elasticsearch where _source is a list and fields is set? That would help reviewing this.

bartbroere commented 1 month ago

Thanks. Would you mind pasting here a JSON response from Elasticsearch where _source is a list and fields is set? That would help reviewing this.

Yes, no problem:

Request:

{"_source": ["AvgTicketPrice", "Cancelled", "Carrier", "Cities", "Dest", "DestAirportID", "DestCityName", "DestCountry", "DestLocation", "DestRegion", "DestWeather", "DistanceKilometers", "DistanceMiles", "FlightDelay", "FlightDelayMin", "FlightDelayType", "FlightNum", "FlightTimeHour", "FlightTimeMin", "Origin", "OriginAirportID", "OriginCityName", "OriginCountry", "OriginLocation", "OriginRegion", "OriginWeather", "dayOfWeek", "timestamp"], "sort": [{"_doc": "asc"}], "size": 5000, "track_total_hits": false, "pit": {"id": "uMyMBAEHZmxpZ2h0cxZYMTUxQ2txZVQ4aUs2NU13aWZ4ZVFRABZvZFFHLThJSlF6aVdDUklqRm94UE1RAAAAAAAAAABEFmxoa2haTkdGU2h1X01yb2xaamhDbmcAARZYMTUxQ2txZVQ4aUs2NU13aWZ4ZVFRAAA=", "keep_alive": "3m"}, "fields": ["AvgTicketPrice", "Cancelled", "Carrier", "Cities", "Dest", "DestAirportID", "DestCityName", "DestCountry", "DestLocation", "DestRegion", "DestWeather", "DistanceKilometers", "DistanceMiles", "FlightDelay", "FlightDelayMin", "FlightDelayType", "FlightNum", "FlightTimeHour", "FlightTimeMin", "Origin", "OriginAirportID", "OriginCityName", "OriginCountry", "OriginLocation", "OriginRegion", "OriginWeather", "dayOfWeek", "timestamp"]}

Response:

{"pit_id": "uMyMBAEHZmxpZ2h0cxZYMTUxQ2txZVQ4aUs2NU13aWZ4ZVFRABZvZFFHLThJSlF6aVdDUklqRm94UE1RAAAAAAAAAABEFmxoa2haTkdGU2h1X01yb2xaamhDbmcAARZYMTUxQ2txZVQ4aUs2NU13aWZ4ZVFRAAA=", "took": 147, "timed_out": false, "_shards": {"total": 1, "successful": 1, "skipped": 0, "failed": 0}, "hits": {"max_score": null, "hits": [{"_index": "flights", "_id": "0", "_score": null, "_source": {"FlightNum": "9HY9SWR", "DestCountry": "AU", "OriginWeather": "Sunny", "OriginCityName": "Frankfurt am Main", "AvgTicketPrice": 841.2656419677076, "DistanceMiles": 10247.856675613455, "FlightDelay": false, "DestWeather": "Rain", "Dest": "Sydney Kingsford Smith International Airport", "FlightDelayType": "No Delay", "OriginCountry": "DE", "dayOfWeek": 0, "DistanceKilometers": 16492.32665375846, "timestamp": "2018-01-01T00:00:00", "DestLocation": {"lat": "-33.94609833", "lon": "151.177002"}, "DestAirportID": "SYD", "Carrier": "Kibana Airlines", "Cancelled": false, "FlightTimeMin": 1030.7704158599038, "Origin": "Frankfurt am Main Airport", "OriginLocation": {"lat": "50.033333", "lon": "8.570556"}, "DestRegion": "SE-BD", "OriginAirportID": "FRA", "OriginRegion": "DE-HE", "DestCityName": "Sydney", "FlightTimeHour": 17.179506930998397, "FlightDelayMin": 0}, "fields": {"FlightNum": ["9HY9SWR"], "Origin": ["Frankfurt am Main Airport"], "OriginLocation": [{"coordinates": [8.570556, 50.033333], "type": "Point"}], "DestLocation": [{"coordinates": [151.177002, -33.94609833], "type": "Point"}], "FlightDelay": [false], "DistanceMiles": [10247.856], "FlightTimeMin": [1030.7704], "OriginWeather": ["Sunny"], "dayOfWeek": [0], "AvgTicketPrice": [841.2656], "Carrier": ["Kibana Airlines"], "FlightDelayMin": [0], "OriginRegion": ["DE-HE"], "DestAirportID": ["SYD"], "FlightDelayType": ["No Delay"], "timestamp": ["2018-01-01T00:00:00"], "Dest": ["Sydney Kingsford Smith International Airport"], "FlightTimeHour": [17.179506], "Cancelled": [false], "DistanceKilometers": [16492.326], "OriginCityName": ["Frankfurt am Main"], "DestWeather": ["Rain"], "OriginCountry": ["DE"], "Cities": ["Sydney", "Frankfurt am Main"], "DestCountry": ["AU"], "DestRegion": ["SE-BD"], "DestCityName": ["Sydney"], "OriginAirportID": ["FRA"]}, "sort": [0, 0]}, {"_index": "flights", "_id": "1", "_score": null, "_source": {"FlightNum": "X98CCZO", "DestCountry": "IT", "OriginWeather": "Clear", "OriginCityName": "Cape Town", "AvgTicketPrice": 882.9826615595518, "DistanceMiles": 5482.606664853586, "FlightDelay": false, "DestWeather": "Sunny", "Dest": "Venice Marco Polo Airport", "FlightDelayType": "No Delay", "OriginCountry": "ZA", "dayOfWeek": 0, "DistanceKilometers": 8823.40014044213, "timestamp": "2018-01-01T18:27:00", "DestLocation": {"lat": "45.505299", "lon": "12.3519"}, "DestAirportID": "VE05", "Carrier": "Logstash Airways", "Cancelled": false, "FlightTimeMin": 464.3894810759016, "Origin": "Cape Town International Airport", "OriginLocation": {"lat": "-33.96480179", "lon": "18.60169983"}, "DestRegion": "IT-34", "OriginAirportID": "CPT", "OriginRegion": "SE-BD", "DestCityName": "Venice", "FlightTimeHour": 7.73982468459836, "FlightDelayMin": 0}, "fields": {"FlightNum": ["X98CCZO"], "Origin": ["Cape Town International Airport"], "OriginLocation": [{"coordinates": [18.60169983, -33.96480179], "type": "Point"}], "DestLocation": [{"coordinates": [12.3519, 45.505299], "type": "Point"}], "FlightDelay": [false], "DistanceMiles": [5482.6064], "FlightTimeMin": [464.3895], "OriginWeather": ["Clear"], "dayOfWeek": [0], "AvgTicketPrice": [882.98267], "Carrier": ["Logstash Airways"], "FlightDelayMin": [0], "OriginRegion": ["SE-BD"], "DestAirportID": ["VE05"], "FlightDelayType": ["No Delay"], "timestamp": ["2018-01-01T18:27:00"], "Dest": ["Venice Marco Polo Airport"], "FlightTimeHour": [7.739825], "Cancelled": [false], "DistanceKilometers": [8823.4], "OriginCityName": ["Cape Town"], "DestWeather": ["Sunny"], "OriginCountry": ["ZA"], "Cities": ["Venice", "Cape Town"], "DestCountry": ["IT"], "DestRegion": ["IT-34"], "DestCityName": ["Venice"], "OriginAirportID": ["CPT"]}, "sort": [1, 1]}, {"_index": "flights", "_id": "2", "_score": null, "_source": {"FlightNum": "UFK2WIZ", "DestCountry": "IT", "OriginWeather": "Rain", "OriginCityName": "Venice", "AvgTicketPrice": 190.6369038508356, "DistanceMiles": 0.0, "FlightDelay": false, "DestWeather": "Cloudy", "Dest": "Venice Marco Polo Airport", "FlightDelayType": "No Delay", "OriginCountry": "IT", "dayOfWeek": 0, "DistanceKilometers": 0.0, "timestamp": "2018-01-01T17:11:14", "DestLocation": {"lat": "45.505299", "lon": "12.3519"}, "DestAirportID": "VE05", "Carrier": "Logstash Airways", "Cancelled": false, "FlightTimeMin": 0.0, "Origin": "Venice Marco Polo Airport", "OriginLocation": {"lat": "45.505299", "lon": "12.3519"}, "DestRegion": "IT-34", "OriginAirportID": "VE05", "OriginRegion": "IT-34", "DestCityName": "Venice", "FlightTimeHour": 0.0, "FlightDelayMin": 0}, "fields": {"FlightNum": ["UFK2WIZ"], "Origin": ["Venice Marco Polo Airport"], "OriginLocation": [{"coordinates": [12.3519, 45.505299], "type": "Point"}], "DestLocation": [{"coordinates": [12.3519, 45.505299], "type": "Point"}], "FlightDelay": [false], "DistanceMiles": [0.0], "FlightTimeMin": [0.0], "OriginWeather": ["Rain"], "dayOfWeek": [0], "AvgTicketPrice": [190.6369], "Carrier": ["Logstash Airways"], "FlightDelayMin": [0], "OriginRegion": ["IT-34"], "DestAirportID": ["VE05"], "FlightDelayType": ["No Delay"], "timestamp": ["2018-01-01T17:11:14"], "Dest": ["Venice Marco Polo Airport"], "FlightTimeHour": [0.0], "Cancelled": [false], "DistanceKilometers": [0.0], "OriginCityName": ["Venice"], "DestWeather": ["Cloudy"], "OriginCountry": ["IT"], "Cities": ["Venice", "Venice"], "DestCountry": ["IT"], "DestRegion": ["IT-34"], "DestCityName": ["Venice"], "OriginAirportID": ["VE05"]}, "sort": [2, 2]}, {"_index": "flights", "_id": "3", "_score": null, "_source": {"FlightNum": "EAYQW69", "DestCountry": "IT", "OriginWeather": "Thunder & Lightning", "OriginCityName": "Naples", "AvgTicketPrice": 181.69421554118, "DistanceMiles": 345.31943877289535, "FlightDelay": true, "DestWeather": "Clear", "Dest": "Treviso-Sant\'Angelo Airport", "FlightDelayType": "Weather Delay", "OriginCountry": "IT", "dayOfWeek": 0, "DistanceKilometers": 555.7377668725265, "timestamp": "2018-01-01T10:33:28", "DestLocation": {"lat": "45.648399", "lon": "12.1944"}, "DestAirportID": "TV01", "Carrier": "Kibana Airlines", "Cancelled": true, "FlightTimeMin": 222.74905899019436, "Origin": "Naples International Airport", "OriginLocation": {"lat": "40.886002", "lon": "14.2908"}, "DestRegion": "IT-34", "OriginAirportID": "NA01", "OriginRegion": "IT-72", "DestCityName": "Treviso", "FlightTimeHour": 3.712484316503239, "FlightDelayMin": 180}, "fields": {"FlightNum": ["EAYQW69"], "Origin": ["Naples International Airport"], "OriginLocation": [{"coordinates": [14.2908, 40.886002], "type": "Point"}], "DestLocation": [{"coordinates": [12.1944, 45.648399], "type": "Point"}], "FlightDelay": [true], "DistanceMiles": [345.31943], "FlightTimeMin": [222.74905], "OriginWeather": ["Thunder & Lightning"], "dayOfWeek": [0], "AvgTicketPrice": [181.69421], "Carrier": ["Kibana Airlines"], "FlightDelayMin": [180], "OriginRegion": ["IT-72"], "DestAirportID": ["TV01"], "FlightDelayType": ["Weather Delay"], "timestamp": ["2018-01-01T10:33:28"], "Dest": ["Treviso-Sant\'Angelo Airport"], "FlightTimeHour": [3.7124844], "Cancelled": [true], "DistanceKilometers": [555.7378], "OriginCityName": ["Naples"], "DestWeather": ["Clear"], "OriginCountry": ["IT"], "Cities": ["Treviso", "Naples"], "DestCountry": ["IT"], "DestRegion": ["IT-34"], "DestCityName": ["Treviso"], "OriginAirportID": ["NA01"]}, "sort": [3, 3]}, {"_index": "flights", "_id": "4", "_score": null, "_source": {"FlightNum": "58U013N", "DestCountry": "CN", "OriginWeather": "Damaging Wind", "OriginCityName": "Mexico City", "AvgTicketPrice": 730.041778346198, "DistanceMiles": 8300.428124665925, "FlightDelay": false, "DestWeather": "Clear", "Dest": "Xi\'an Xianyang International Airport", "FlightDelayType": "No Delay", "OriginCountry": "MX", "dayOfWeek": 0, "DistanceKilometers": 13358.24419986236, "timestamp": "2018-01-01T05:13:00", "DestLocation": {"lat": "34.447102", "lon": "108.751999"}, "DestAirportID": "XIY", "Carrier": "Kibana Airlines", "Cancelled": false, "FlightTimeMin": 785.7790705801389, "Origin": "Licenciado Benito Juarez International Airport", "OriginLocation": {"lat": "19.4363", "lon": "-99.072098"}, "DestRegion": "SE-BD", "OriginAirportID": "AICM", "OriginRegion": "MX-DIF", "DestCityName": "Xi\'an", "FlightTimeHour": 13.096317843002314, "FlightDelayMin": 0}, "fields": {"FlightNum": ["58U013N"], "Origin": ["Licenciado Benito Juarez International Airport"], "OriginLocation": [{"coordinates": [-99.072098, 19.4363], "type": "Point"}], "DestLocation": [{"coordinates": [108.751999, 34.447102], "type": "Point"}], "FlightDelay": [false], "DistanceMiles": [8300.428], "FlightTimeMin": [785.77905], "OriginWeather": ["Damaging Wind"], "dayOfWeek": [0], "AvgTicketPrice": [730.04175], "Carrier": ["Kibana Airlines"], "FlightDelayMin": [0], "OriginRegion": ["MX-DIF"], "DestAirportID": ["XIY"], "FlightDelayType": ["No Delay"], "timestamp": ["2018-01-01T05:13:00"], "Dest": ["Xi\'an Xianyang International Airport"], "FlightTimeHour": [13.096318], "Cancelled": [false], "DistanceKilometers": [13358.244], "OriginCityName": ["Mexico City"], "DestWeather": ["Clear"], "OriginCountry": ["MX"], "Cities": ["Xi\'an", "Mexico City"], "DestCountry": ["CN"], "DestRegion": ["SE-BD"], "DestCityName": ["Xi\'an"], "OriginAirportID": ["AICM"]}, "sort": [4, 4]}, {"_index": "flights", "_id": "5", "_score": null, "_source": {"FlightNum": "XEJ78I2", "DestCountry": "IT", "OriginWeather": "Rain", "OriginCityName": "Edmonton", "AvgTicketPrice": 418.1520890531832, "DistanceMiles": 4891.315227492962, "FlightDelay": false, "DestWeather": "Thunder & Lightning", "Dest": "Genoa Cristoforo Colombo Airport", "FlightDelayType": "No Delay", "OriginCountry": "CA", "dayOfWeek": 0, "DistanceKilometers": 7871.808813474433, "timestamp": "2018-01-01T01:43:03", "DestLocation": {"lat": "44.4133", "lon": "8.8375"}, "DestAirportID": "GE01", "Carrier": "JetBeats", "Cancelled": false, "FlightTimeMin": 393.5904406737217, "Origin": "Edmonton International Airport", "OriginLocation": {"lat": "53.30970001", "lon": "-113.5800018"}, "DestRegion": "IT-42", "OriginAirportID": "CYEG", "OriginRegion": "CA-AB", "DestCityName": "Genova", "FlightTimeHour": 6.559840677895361, "FlightDelayMin": 0}, "fields": {"FlightNum": ["XEJ78I2"], "Origin": ["Edmonton International Airport"], "OriginLocation": [{"coordinates": [-113.5800018, 53.30970001], "type": "Point"}], "DestLocation": [{"coordinates": [8.8375, 44.4133], "type": "Point"}], "FlightDelay": [false], "DistanceMiles": [4891.3154], "FlightTimeMin": [393.59045], "OriginWeather": ["Rain"], "dayOfWeek": [0], "AvgTicketPrice": [418.1521], "Carrier": ["JetBeats"], "FlightDelayMin": [0], "OriginRegion": ["CA-AB"], "DestAirportID": ["GE01"], "FlightDelayType": ["No Delay"], "timestamp": ["2018-01-01T01:43:03"], "Dest": ["Genoa Cristoforo Colombo Airport"], "FlightTimeHour": [6.5598407], "Cancelled": [false], "DistanceKilometers": [7871.8086], "OriginCityName": ["Edmonton"], "DestWeather": ["Thunder & Lightning"], "OriginCountry": ["CA"], "Cities": ["Genova", "Edmonton"], "DestCountry": ["IT"], "DestRegion": ["IT-42"], "DestCityName": ["Genova"], "OriginAirportID": ["CYEG"]}, "sort": [5, 5]}, {"_index": "flights", "_id": "6", "_score": null, "_source": {"FlightNum": "EVARI8I", "DestCountry": "CH", "OriginWeather": "Clear", "OriginCityName": "Zurich", "AvgTicketPrice": 180.24681638061213, "DistanceMiles": 0.0, "FlightDelay": true, "DestWeather": "Hail", "Dest": "Zurich Airport", "FlightDelayType": "Security Delay", "OriginCountry": "CH", "dayOfWeek": 0, "DistanceKilometers": 0.0, "timestamp": "2018-01-01T13:49:53", "DestLocation": {"lat": "47.464699", "lon": "8.54917"}, "DestAirportID": "ZRH", "Carrier": "JetBeats", "Cancelled": false, "FlightTimeMin": 300.0, "Origin": "Zurich Airport", "OriginLocation": {"lat": "47.464699", "lon": "8.54917"}, "DestRegion": "CH-ZH", "OriginAirportID": "ZRH", "OriginRegion": "CH-ZH", "DestCityName": "Zurich", "FlightTimeHour": 5.0, "FlightDelayMin": 300}, "fields": {"FlightNum": ["EVARI8I"], "Origin": ["Zurich Airport"], "OriginLocation": [{"coordinates": [8.54917, 47.464699], "type": "Point"}], "DestLocation": [{"coordinates": [8.54917, 47.464699], "type": "Point"}], "FlightDelay": [true], "DistanceMiles": [0.0], "FlightTimeMin": [300.0], "OriginWeather": ["Clear"], "dayOfWeek": [0], "AvgTicketPrice": [180.24681], "Carrier": ["JetBeats"], "FlightDelayMin": [300], "OriginRegion": ["CH-ZH"], "DestAirportID": ["ZRH"], "FlightDelayType": ["Security Delay"], "timestamp": ["2018-01-01T13:49:53"], "Dest": ["Zurich Airport"], "FlightTimeHour": [5.0], "Cancelled": [false], "DistanceKilometers": [0.0], "OriginCityName": ["Zurich"], "DestWeather": ["Hail"], "OriginCountry": ["CH"], "Cities": ["Zurich", "Zurich"], "DestCountry": ["CH"], "DestRegion": ["CH-ZH"], "DestCityName": ["Zurich"], "OriginAirportID": ["ZRH"]}, "sort": [6, 6]}, {"_index": "flights", "_id": "7", "_score": null, "_source": {"FlightNum": "1IRBW25", "DestCountry": "CA", "OriginWeather": "Thunder & Lightning", "OriginCityName": "Rome", "AvgTicketPrice": 585.1843103083941, "DistanceMiles": 4203.1829639346715, "FlightDelay": false, "DestWeather": "Clear", "Dest": "Ottawa Macdonald-Cartier International Airport", "FlightDelayType": "No Delay", "OriginCountry": "IT", "dayOfWeek": 0, "DistanceKilometers": 6764.367283910481, "timestamp": "2018-01-01T04:54:59", "DestLocation": {"lat": "45.32249832", "lon": "-75.66919708"}, "DestAirportID": "YOW", "Carrier": "Kibana Airlines", "Cancelled": false, "FlightTimeMin": 614.9424803554983, "Origin": "Ciampino___G. B. Pastine International Airport", "OriginLocation": {"lat": "41.7994", "lon": "12.5949"}, "DestRegion": "CA-ON", "OriginAirportID": "RM12", "OriginRegion": "IT-62", "DestCityName": "Ottawa", "FlightTimeHour": 10.249041339258305, "FlightDelayMin": 0}, "fields": {"FlightNum": ["1IRBW25"], "Origin": ["Ciampino___G. B. Pastine International Airport"], "OriginLocation": [{"coordinates": [12.5949, 41.7994], "type": "Point"}], "DestLocation": [{"coordinates": [-75.66919708, 45.32249832], "type": "Point"}], "FlightDelay": [false], "DistanceMiles": [4203.183], "FlightTimeMin": [614.9425], "OriginWeather": ["Thunder & Lightning"], "dayOfWeek": [0], "AvgTicketPrice": [585.1843], "Carrier": ["Kibana Airlines"], "FlightDelayMin": [0], "OriginRegion": ["IT-62"], "DestAirportID": ["YOW"], "FlightDelayType": ["No Delay"], "timestamp": ["2018-01-01T04:54:59"], "Dest": ["Ottawa Macdonald-Cartier International Airport"], "FlightTimeHour": [10.249042], "Cancelled": [false], "DistanceKilometers": [6764.367], "OriginCityName": ["Rome"], "DestWeather": ["Clear"], "OriginCountry": ["IT"], "Cities": ["Ottawa", "Rome"], "DestCountry": ["CA"], "DestRegion": ["CA-ON"], "DestCityName": ["Ottawa"], "OriginAirportID": ["RM12"]}, "sort": [7, 7]}, {"_index": "flights", "_id": "8", "_score": null, "_source": {"FlightNum": "M05KE88", "DestCountry": "IN", "OriginWeather": "Heavy Fog", "OriginCityName": "Milan", "AvgTicketPrice": 960.8697358054351, "DistanceMiles": 4377.166776556647, "FlightDelay": true, "DestWeather": "Cloudy", "Dest": "Rajiv Gandhi International Airport", "FlightDelayType": "NAS Delay", "OriginCountry": "IT", "dayOfWeek": 0, "DistanceKilometers": 7044.367088850781, "timestamp": "2018-01-01T12:09:35", "DestLocation": {"lat": "17.23131752", "lon": "78.42985535"}, "DestAirportID": "HYD", "Carrier": "Kibana Airlines", "Cancelled": true, "FlightTimeMin": 602.0305907375651, "Origin": "Milano Linate Airport", "OriginLocation": {"lat": "45.445099", "lon": "9.27674"}, "DestRegion": "SE-BD", "OriginAirportID": "MI11", "OriginRegion": "IT-25", "DestCityName": "Hyderabad", "FlightTimeHour": 10.033843178959419, "FlightDelayMin": 15}, "fields": {"FlightNum": ["M05KE88"], "Origin": ["Milano Linate Airport"], "OriginLocation": [{"coordinates": [9.27674, 45.445099], "type": "Point"}], "DestLocation": [{"coordinates": [78.42985535, 17.23131752], "type": "Point"}], "FlightDelay": [true], "DistanceMiles": [4377.167], "FlightTimeMin": [602.0306], "OriginWeather": ["Heavy Fog"], "dayOfWeek": [0], "AvgTicketPrice": [960.86975], "Carrier": ["Kibana Airlines"], "FlightDelayMin": [15], "OriginRegion": ["IT-25"], "DestAirportID": ["HYD"], "FlightDelayType": ["NAS Delay"], "timestamp": ["2018-01-01T12:09:35"], "Dest": ["Rajiv Gandhi International Airport"], "FlightTimeHour": [10.033843], "Cancelled": [true], "DistanceKilometers": [7044.367], "OriginCityName": ["Milan"], "DestWeather": ["Cloudy"], "OriginCountry": ["IT"], "Cities": ["Hyderabad", "Milan"], "DestCountry": ["IN"], "DestRegion": ["SE-BD"], "DestCityName": ["Hyderabad"], "OriginAirportID": ["MI11"]}, "sort": [8, 8]}, {"_index": "flights", "_id": "9", "_score": null, "_source": {"FlightNum": "SNI3M1Z", "DestCountry": "IT", "OriginWeather": "Cloudy", "OriginCityName": "Moscow", "AvgTicketPrice": 296.8777725965789, "DistanceMiles": 1303.5538675692512, "FlightDelay": false, "DestWeather": "Rain", "Dest": "Treviso-Sant\'Angelo Airport", "FlightDelayType": "No Delay", "OriginCountry": "RU", "dayOfWeek": 0, "DistanceKilometers": 2097.866595449369, "timestamp": "2018-01-01T12:09:35", "DestLocation": {"lat": "45.648399", "lon": "12.1944"}, "DestAirportID": "TV01", "Carrier": "Logstash Airways", "Cancelled": false, "FlightTimeMin": 174.82221628744742, "Origin": "Sheremetyevo International Airport", "OriginLocation": {"lat": "55.972599", "lon": "37.4146"}, "DestRegion": "IT-34", "OriginAirportID": "SVO", "OriginRegion": "RU-MOS", "DestCityName": "Treviso", "FlightTimeHour": 2.91370360479079, "FlightDelayMin": 0}, "fields": {"FlightNum": ["SNI3M1Z"], "Origin": ["Sheremetyevo International Airport"], "OriginLocation": [{"coordinates": [37.4146, 55.972599], "type": "Point"}], "DestLocation": [{"coordinates": [12.1944, 45.648399], "type": "Point"}], "FlightDelay": [false], "DistanceMiles": [1303.5538], "FlightTimeMin": [174.82222], "OriginWeather": ["Cloudy"], "dayOfWeek": [0], "AvgTicketPrice": [296.87778], "Carrier": ["Logstash Airways"], "FlightDelayMin": [0], "OriginRegion": ["RU-MOS"], "DestAirportID": ["TV01"], "FlightDelayType": ["No Delay"], "timestamp": ["2018-01-01T12:09:35"], "Dest": ["Treviso-Sant\'Angelo Airport"], "FlightTimeHour": [2.9137037], "Cancelled": [false], "DistanceKilometers": [2097.8667], "OriginCityName": ["Moscow"], "DestWeather": ["Rain"], "OriginCountry": ["RU"], "Cities": ["Treviso", "Moscow"], "DestCountry": ["IT"], "DestRegion": ["IT-34"], "DestCityName": ["Treviso"], "OriginAirportID": ["SVO"]}, "sort": [9, 9]}, {"_index": "flights", "_id": "10", "_score": null, "_source": {"FlightNum": "JQ2XXQ5", "DestCountry": "FI", "OriginWeather": "Rain", "OriginCityName": "Albuquerque", "AvgTicketPrice": 906.4379477399872, "DistanceMiles": 5313.8222112173335, "FlightDelay": false, "DestWeather": "Rain", "Dest": "Helsinki Vantaa Airport", "FlightDelayType": "No Delay", 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"type": "Point"}], "DestLocation": [{"coordinates": [-97.43309784, 37.64989853], "type": "Point"}], "FlightDelay": [false], "DistanceMiles": [5400.1367], "FlightTimeMin": [457.40408], "OriginWeather": ["Damaging Wind"], "dayOfWeek": [1], "AvgTicketPrice": [618.0239], "Carrier": ["Logstash Airways"], "FlightDelayMin": [0], "OriginRegion": ["SE-BD"], "DestAirportID": ["ICT"], "FlightDelayType": ["No Delay"], "timestamp": ["2018-01-16T08:47:56"], "Dest": ["Wichita Mid Continent Airport"], "FlightTimeHour": [7.623401], "Cancelled": [true], "DistanceKilometers": [8690.678], "OriginCityName": ["Rome"], "DestWeather": ["Sunny"], "OriginCountry": ["IT"], "Cities": ["Wichita", "Rome"], "DestCountry": ["US"], "DestRegion": ["US-KS"], "DestCityName": ["Wichita"], "OriginAirportID": ["FCO"]}, "sort": [4996, 4996]}, {"_index": "flights", "_id": "4997", "_score": null, "_source": {"FlightNum": "KGQK1B4", "DestCountry": "CA", "OriginWeather": "Rain", "OriginCityName": "Warsaw", "AvgTicketPrice": 730.4717239616782, "DistanceMiles": 4527.391333277357, "FlightDelay": false, "DestWeather": "Hail", "Dest": "Winnipeg / James Armstrong Richardson International Airport", "FlightDelayType": "No Delay", "OriginCountry": "PL", "dayOfWeek": 1, "DistanceKilometers": 7286.130077861916, "timestamp": "2018-01-16T20:20:17", "DestLocation": {"lat": "49.90999985", "lon": "-97.23989868"}, "DestAirportID": "YWG", "Carrier": "ES-Air", "Cancelled": true, "FlightTimeMin": 455.38312986636976, "Origin": "Warsaw Chopin Airport", "OriginLocation": {"lat": "52.16569901", "lon": "20.96710014"}, "DestRegion": "CA-MB", "OriginAirportID": "WAW", "OriginRegion": "PL-MZ", "DestCityName": "Winnipeg", "FlightTimeHour": 7.589718831106163, "FlightDelayMin": 0}, "fields": {"FlightNum": ["KGQK1B4"], "Origin": ["Warsaw Chopin Airport"], "OriginLocation": [{"coordinates": [20.96710014, 52.16569901], "type": "Point"}], "DestLocation": [{"coordinates": [-97.23989868, 49.90999985], "type": "Point"}], "FlightDelay": [false], "DistanceMiles": [4527.391], "FlightTimeMin": [455.38312], "OriginWeather": ["Rain"], "dayOfWeek": [1], "AvgTicketPrice": [730.47174], "Carrier": ["ES-Air"], "FlightDelayMin": [0], "OriginRegion": ["PL-MZ"], "DestAirportID": ["YWG"], "FlightDelayType": ["No Delay"], "timestamp": ["2018-01-16T20:20:17"], "Dest": ["Winnipeg / James Armstrong Richardson International Airport"], "FlightTimeHour": [7.589719], "Cancelled": [true], "DistanceKilometers": [7286.13], "OriginCityName": ["Warsaw"], "DestWeather": ["Hail"], "OriginCountry": ["PL"], "Cities": ["Winnipeg", "Warsaw"], "DestCountry": ["CA"], "DestRegion": ["CA-MB"], "DestCityName": ["Winnipeg"], "OriginAirportID": ["WAW"]}, "sort": [4997, 4997]}, {"_index": "flights", "_id": "4998", "_score": null, "_source": {"FlightNum": "VU9HDBO", "DestCountry": "PL", "OriginWeather": "Heavy Fog", "OriginCityName": "Belogorsk", "AvgTicketPrice": 879.9827336371554, "DistanceMiles": 4159.88094808335, "FlightDelay": false, "DestWeather": "Hail", "Dest": "Warsaw Chopin Airport", "FlightDelayType": "No Delay", "OriginCountry": "RU", "dayOfWeek": 1, "DistanceKilometers": 6694.679444512251, "timestamp": "2018-01-16T22:43:58", "DestLocation": {"lat": "52.16569901", "lon": "20.96710014"}, "DestAirportID": "WAW", "Carrier": "ES-Air", "Cancelled": false, "FlightTimeMin": 418.4174652820157, "Origin": "Ukrainka Air Base", "OriginLocation": {"lat": "51.169997", "lon": "128.445007"}, "DestRegion": "PL-MZ", "OriginAirportID": "XHBU", "OriginRegion": "RU-AMU", "DestCityName": "Warsaw", "FlightTimeHour": 6.973624421366929, "FlightDelayMin": 0}, "fields": {"FlightNum": ["VU9HDBO"], "Origin": ["Ukrainka Air Base"], "OriginLocation": [{"coordinates": [128.445007, 51.169997], "type": "Point"}], "DestLocation": [{"coordinates": [20.96710014, 52.16569901], "type": "Point"}], "FlightDelay": [false], "DistanceMiles": [4159.881], "FlightTimeMin": [418.41748], "OriginWeather": ["Heavy Fog"], "dayOfWeek": [1], "AvgTicketPrice": [879.9827], "Carrier": ["ES-Air"], "FlightDelayMin": [0], "OriginRegion": ["RU-AMU"], "DestAirportID": ["WAW"], "FlightDelayType": ["No Delay"], "timestamp": ["2018-01-16T22:43:58"], "Dest": ["Warsaw Chopin Airport"], "FlightTimeHour": [6.973624], "Cancelled": [false], "DistanceKilometers": [6694.6797], "OriginCityName": ["Belogorsk"], "DestWeather": ["Hail"], "OriginCountry": ["RU"], "Cities": ["Warsaw", "Belogorsk"], "DestCountry": ["PL"], "DestRegion": ["PL-MZ"], "DestCityName": ["Warsaw"], "OriginAirportID": ["XHBU"]}, "sort": [4998, 4998]}, {"_index": "flights", "_id": "4999", "_score": null, "_source": {"FlightNum": "P5F9MCZ", "DestCountry": "MX", "OriginWeather": "Rain", "OriginCityName": "Edmonton", "AvgTicketPrice": 299.94926749106776, "DistanceMiles": 2461.2994214866576, "FlightDelay": false, "DestWeather": "Thunder & Lightning", "Dest": "Licenciado Benito Juarez International Airport", "FlightDelayType": "No Delay", "OriginCountry": "CA", "dayOfWeek": 1, "DistanceKilometers": 3961.0774561730236, "timestamp": "2018-01-16T07:35:22", "DestLocation": {"lat": "19.4363", "lon": "-99.072098"}, "DestAirportID": "AICM", "Carrier": "JetBeats", "Cancelled": false, "FlightTimeMin": 360.09795056118395, "Origin": "Edmonton International Airport", "OriginLocation": {"lat": "53.30970001", "lon": "-113.5800018"}, "DestRegion": "MX-DIF", "OriginAirportID": "CYEG", "OriginRegion": "CA-AB", "DestCityName": "Mexico City", "FlightTimeHour": 6.001632509353066, "FlightDelayMin": 0}, "fields": {"FlightNum": ["P5F9MCZ"], "Origin": ["Edmonton International Airport"], "OriginLocation": [{"coordinates": [-113.5800018, 53.30970001], "type": "Point"}], "DestLocation": [{"coordinates": [-99.072098, 19.4363], "type": "Point"}], "FlightDelay": [false], "DistanceMiles": [2461.2993], "FlightTimeMin": [360.09796], "OriginWeather": ["Rain"], "dayOfWeek": [1], "AvgTicketPrice": [299.94928], "Carrier": ["JetBeats"], "FlightDelayMin": [0], "OriginRegion": ["CA-AB"], "DestAirportID": ["AICM"], "FlightDelayType": ["No Delay"], "timestamp": ["2018-01-16T07:35:22"], "Dest": ["Licenciado Benito Juarez International Airport"], "FlightTimeHour": [6.0016327], "Cancelled": [false], "DistanceKilometers": [3961.0774], "OriginCityName": ["Edmonton"], "DestWeather": ["Thunder & Lightning"], "OriginCountry": ["CA"], "Cities": ["Mexico City", "Edmonton"], "DestCountry": ["MX"], "DestRegion": ["MX-DIF"], "DestCityName": ["Mexico City"], "OriginAirportID": ["CYEG"]}, "sort": [4999, 4999]}]}}

This actually shows a lot of duplicate data going over the wire. Perhaps it's possible to come up with what field names to put in _source and what field names need to go in fields, before sending the request.

The data was obtained by setting a breakpoint on line 1618 in eland/operations.py.