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Global aggregations
The global
aggregations lets you break out of the aggregation context of a filter aggregation. Even if you have included a filter query that narrows down a set of documents, the global
aggregation aggregates on all documents as if the filter query wasn’t there. It ignores the filter
aggregation and implicitly assumes the match_all
query.
The following example returns the avg
value of the taxful_total_price
field from all documents in the index:
GET opensearch_dashboards_sample_data_ecommerce/_search
{
"size": 0,
"query": {
"range": {
"taxful_total_price": {
"lte": 50
}
}
},
"aggs": {
"total_avg_amount": {
"global": {},
"aggs": {
"avg_price": {
"avg": {
"field": "taxful_total_price"
}
}
}
}
}
}
Example response
...
"aggregations" : {
"total_avg_amount" : {
"doc_count" : 4675,
"avg_price" : {
"value" : 75.05542864304813
}
}
}
}
You can see that the average value for the taxful_total_price
field is 75.05 and not the 38.36 as seen in the filter
example when the query matched.