Stack Overflow Asked by Joe - Elasticsearch Handbook on January 5, 2022
It’s possible to include sub-aggregation metadata like so:
GET kibana_sample_data_flights/_search
{
"size": 0,
"query": ...,
"aggs": {
"by_delay": {
"terms": {
"field": "FlightDelay"
},
"meta": { <---
"key": "val"
}
},
"by_cancelled": {
"terms": {
"field": "Cancelled"
},
"meta": { <---
"key": "val"
}
}
}
}
Now, there are dozens of such sub-aggs and some shared metadata. Although it only applies to the aggs, I wouldn’t mind putting it somewhere in the query
section. So is there a per-search-body metadata field?
I’m thinking I could wrap all these sub-aggs inside of a match_all
filter group:
{
"size": 0,
"query": ...,
"aggs": {
"meta_parent": {
"filter": {
"match_all": {}
},
"meta": {
"shared": "meta"
},
"aggs": {
"by_delay": ...,
"by_cancelled": ...
}
}
}
}
Is there a better way?
If you don't have any query
part, I would leverage the global
aggregation, like this:
{
"size": 0,
"aggs": {
"meta_parent": {
"global": {},
"meta": {
"shared": "meta"
},
"aggs": {
"by_delay": ...,
"by_cancelled": ...
}
}
}
}
Otherwise, what you suggested with a filter/match_all
aggregation can work, too:
{
"size": 0,
"aggs": {
"meta_parent": {
"filter": {
"match_all": {}
},
"meta": {
"shared": "meta"
},
"aggs": {
"by_delay": ...,
"by_cancelled": ...
}
}
}
}
Answered by Val on January 5, 2022
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