Aggs percentage doc_count - elasticsearch

Question

So I know my total hits are 182 documents
"hits": {
"total": {
"value": 182,
"relation": "eq"
},
"max_score": null,
"hits": []
},
And then I make a aggregation to know how many documents have the source instagagram or twitter and it returns me:
"bySource": {
"doc_count_error_upper_bound": 0,
"sum_other_doc_count": 0,
"buckets": [
{
"key": "instagram",
"doc_count": 162
},
{
"key": "twitter",
"doc_count": 20
}
]
}
Is it possible to get the percentage of documents that have source twitter and instagram?
So the percentage of documents that have source instagram is 89 % and twitter 11%.
My aggregation code its like this:
"aggs": {
"bySource": {
"terms": {
"field": "profile.source.keyword"
}
}
}
Let me know if this is possible.
Thank you

Answer 1

Sure, it is possible using the 'Bucket Script Aggregation'.
An example query might look like this:
{
"size": 0,
"aggs": {
"filters_agg": {
"filters": {
"filters": {
"sourceCount": {
"match_all": {}
}
}
},
"aggs": {
"bySource": {
"terms": {
"field": "profile.source.keyword"
}
},
"instagram_count_percentage": {
"bucket_script": {
"buckets_path": {
"instagram_count": "bySource['instagram']>_count",
"total_count": "_count"
},
"script": "Math.round((params.instagram_count * 100)/params.total_count)"
}
},
"twitter_count_percentage": {
"bucket_script": {
"buckets_path": {
"twitter_count": "bySource['twitter']>_count",
"total_count": "_count"
},
"script": "Math.round((params.twitter_count * 100)/params.total_count)"
}
}
}
}
}
}
And the response could be something like this:
{
"took": 1,
"timed_out": false,
"_shards": {
"total": 1,
"successful": 1,
"skipped": 0,
"failed": 0
},
"hits": {
"total": {
"value": 182,
"relation": "eq"
},
"max_score": null,
"hits": []
},
"aggregations": {
"filters_agg": {
"buckets": {
"sourceCount": {
"doc_count": 182,
"bySource": {
"doc_count_error_upper_bound": 0,
"sum_other_doc_count": 0,
"buckets": [
{
"key": "instagram",
"doc_count": 162
},
{
"key": "twitter",
"doc_count": 20
}
]
},
"instagram_count_percentage": {
"value": 89
},
"twitter_count_percentage": {
"value": 11
}
}
}
}
}
}
Try to adjust it or get inspired depending on your case and your mapping.