RE: Using json_tuple for Nested json Arrays

[Ryan Harris]

Do you have an example of the query that you tried (which failed).
In short, you probably want to use the get_json_object() UDF:
https://cwiki.apache.org/confluence/display/Hive/LanguageManual+UDF#LanguageManualUDF-get_json_object

if you need the JSON array broken into individual records, you might require 
lateral view explode as in these examples:
http://mechanics.flite.com/blog/2014/04/16/using-explode-and-lateral-view-in-hive/
http://stackoverflow.com/questions/28716165/how-to-query-struct-array-with-hive-get-json-object


From: Sam Joe [mailto:games2013....@gmail.com]
Sent: Tuesday, October 27, 2015 1:29 PM
To: user@hive.apache.org
Subject: Re: Using json_tuple for Nested json Arrays

I tried using EXPLODE function on the nested json array but it doesn't work and 
throws following error:

FAILED: UDFArgumentException explode() takes an array or a map as a parameter


Thanks,
Joel

On Tue, Oct 27, 2015 at 3:20 PM, Sam Joe 
<games2013....@gmail.com<mailto:games2013....@gmail.com>> wrote:
Hi,

Is it possible to use json_tuple function to extract data from json arrays 
(nested too). I am trying to process json data as string and avoid using serdes 
since user data may be malformed.

Please see a sample json data given below:


{
"filter_level": "low",
"retweeted": false,
"in_reply_to_screen_name": null,
"possibly_sensitive": false,
"truncated": false,
"lang": "en",
"in_reply_to_status_id_str": null,
"id": 654395184428515332,
"extended_entities": {
"media": [{
"sizes": {
"thumb": {
"w": 150,
"resize": "crop",
"h": 150
},
"small": {
"w": 340,
"resize": "fit",
"h": 255
},
"large": {
"w": 1024,
"resize": "fit",
"h": 768
},
"medium": {
"w": 600,
"resize": "fit",
"h": 450
}
},
"source_user_id": 16864598,
"media_url": "http://pbs.twimg.com/media/CRSL2MPWsAAOnZo.jpg";,
"display_url": "pic.twitter.com/i3004WyF4g<http://pic.twitter.com/i3004WyF4g>",
"type": "photo",
"url": "http://t.co/i3004WyF4g";,
"id": 654301608990388224,
"media_url_https": "https://pbs.twimg.com/media/CRSL2MPWsAAOnZo.jpg";,
"expanded_url": 
"http://twitter.com/lordlancaster/status/654301626665189376/photo/1";,
"source_user_id_str": "16864598",
"indices": [143,
144],
"source_status_id_str": "654301626665189376",
"source_status_id": 654301626665189376,
"id_str": "654301608990388224"
},
{
"sizes": {
"thumb": {
"w": 150,
"resize": "crop",
"h": 150
},
"small": {
"w": 340,
"resize": "fit",
"h": 255
},
"large": {
"w": 1024,
"resize": "fit",
"h": 768
},
"medium": {
"w": 600,
"resize": "fit",
"h": 450
}
},
"source_user_id": 16864598,
"media_url": "http://pbs.twimg.com/media/CRSL2MRWgAAGOcj.jpg";,
"display_url": "pic.twitter.com/i3004WyF4g<http://pic.twitter.com/i3004WyF4g>",
"type": "photo",
"url": "http://t.co/i3004WyF4g";,
"id": 654301608998764544,
"media_url_https": "https://pbs.twimg.com/media/CRSL2MRWgAAGOcj.jpg";,
"expanded_url": 
"http://twitter.com/lordlancaster/status/654301626665189376/photo/1";,
"source_user_id_str": "16864598",
"indices": [143,
144],
"source_status_id_str": "654301626665189376",
"source_status_id": 654301626665189376,
"id_str": "654301608998764544"
},
{
"sizes": {
"thumb": {
"w": 150,
"resize": "crop",
"h": 150
},
"small": {
"w": 340,
"resize": "fit",
"h": 255
},
"large": {
"w": 1024,
"resize": "fit",
"h": 768
},
"medium": {
"w": 600,
"resize": "fit",
"h": 450
}
},
"source_user_id": 16864598,
"media_url": "http://pbs.twimg.com/media/CRSL2MQWwAAP4Qo.jpg";,
"display_url": "pic.twitter.com/i3004WyF4g<http://pic.twitter.com/i3004WyF4g>",
"type": "photo",
"url": "http://t.co/i3004WyF4g";,
"id": 654301608994586624,
"media_url_https": "https://pbs.twimg.com/media/CRSL2MQWwAAP4Qo.jpg";,
"expanded_url": 
"http://twitter.com/lordlancaster/status/654301626665189376/photo/1";,
"source_user_id_str": "16864598",
"indices": [143,
144],
"source_status_id_str": "654301626665189376",
"source_status_id": 654301626665189376,
"id_str": "654301608994586624"
},
{
"sizes": {
"thumb": {
"w": 150,
"resize": "crop",
"h": 150
},
"small": {
"w": 340,
"resize": "fit",
"h": 255
},
"large": {
"w": 1024,
"resize": "fit",
"h": 768
},
"medium": {
"w": 600,
"resize": "fit",
"h": 450
}
},
"source_user_id": 16864598,
"media_url": "http://pbs.twimg.com/media/CRSL2M8WcAEXowZ.jpg";,
"display_url": "pic.twitter.com/i3004WyF4g<http://pic.twitter.com/i3004WyF4g>",
"type": "photo",
"url": "http://t.co/i3004WyF4g";,
"id": 654301609179115521,
"media_url_https": "https://pbs.twimg.com/media/CRSL2M8WcAEXowZ.jpg";,
"expanded_url": 
"http://twitter.com/lordlancaster/status/654301626665189376/photo/1";,
"source_user_id_str": "16864598",
"indices": [143,
144],
"source_status_id_str": "654301626665189376",
"source_status_id": 654301626665189376,
"id_str": "654301609179115521"
}]
}
}

Appreciate any help!

Thanks,
Joel




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