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|
[[search-aggregations-bucket-filters-aggregation]]
=== Filters Aggregation
Defines a multi bucket aggregations where each bucket is associated with a
filter. Each bucket will collect all documents that match its associated
filter.
Example:
[source,js]
--------------------------------------------------
{
"aggs" : {
"messages" : {
"filters" : {
"filters" : {
"errors" : { "term" : { "body" : "error" }},
"warnings" : { "term" : { "body" : "warning" }}
}
},
"aggs" : {
"monthly" : {
"histogram" : {
"field" : "timestamp",
"interval" : "1M"
}
}
}
}
}
}
--------------------------------------------------
In the above example, we analyze log messages. The aggregation will build two
collection (buckets) of log messages - one for all those containing an error,
and another for all those containing a warning. And for each of these buckets
it will break them down by month.
Response:
[source,js]
--------------------------------------------------
...
"aggs" : {
"messages" : {
"buckets" : {
"errors" : {
"doc_count" : 34,
"monthly" : {
"buckets : [
... // the histogram monthly breakdown
]
}
},
"warnings" : {
"doc_count" : 439,
"monthly" : {
"buckets : [
... // the histogram monthly breakdown
]
}
}
}
}
}
}
...
--------------------------------------------------
==== Anonymous filters
The filters field can also be provided as an array of filters, as in the
following request:
[source,js]
--------------------------------------------------
{
"aggs" : {
"messages" : {
"filters" : {
"filters" : [
{ "term" : { "body" : "error" }},
{ "term" : { "body" : "warning" }}
]
},
"aggs" : {
"monthly" : {
"histogram" : {
"field" : "timestamp",
"interval" : "1M"
}
}
}
}
}
}
--------------------------------------------------
The filtered buckets are returned in the same order as provided in the
request. The response for this example would be:
[source,js]
--------------------------------------------------
...
"aggs" : {
"messages" : {
"buckets" : [
{
"doc_count" : 34,
"monthly" : {
"buckets : [
... // the histogram monthly breakdown
]
}
},
{
"doc_count" : 439,
"monthly" : {
"buckets : [
... // the histogram monthly breakdown
]
}
}
]
}
}
...
--------------------------------------------------
|
