原文地址: https://www.elastic.co/guide/en/elasticsearch/reference/7.7/agg-metadata.html, 原文档版权归 www.elastic.co 所有
IMPORTANT: No additional bug fixes or documentation updates
will be released for this version. For the latest information, see the
current release documentation.
Aggregation Metadataedit
You can associate a piece of metadata with individual aggregations at request time that will be returned in place at response time.
Consider this example where we want to associate the color blue with our terms aggregation.
GET /twitter/_search
{
"size": 0,
"aggs": {
"titles": {
"terms": {
"field": "title"
},
"meta": {
"color": "blue"
}
}
}
}
Then that piece of metadata will be returned in place for our titles terms aggregation
{
"aggregations": {
"titles": {
"meta": {
"color" : "blue"
},
"doc_count_error_upper_bound" : 0,
"sum_other_doc_count" : 0,
"buckets": [
]
}
},
...
}