Let's consider an aggregation in the Author field to get the statistics of each author name:
curl -XPOST "http://localhost:9200/news/public/_search?pretty&search_type=count" -d '{
"aggs" : {
"authors" : {
"terms" : {
"field" : "Author"
}
}
}
}'By giving search_type=count, we make sure that we receive only the aggregation results and not hits or rather, the top-10 results.
The response we get for this is as follows:
{
"took" : 5,
"timed_out" : false,
"_shards" : {
"total" : 1,
"successful" : 1,
"failed" : 0
},
"hits" : {
"total" : 3,
"max_score" : 0.0,
"hits" : [ ]
},
"aggregations" : {
"authors" : {
"doc_count_error_upper_bound" : 0,
"sum_other_doc_count" : 0,
"buckets" : [ {
"key" : "shankar",
"doc_count" : 3
}, {
"key" : "anjali",
"doc_count" : 2
}, {
"key" : "ram",
"doc_count" : 1...