- Elasticsearch Guide: other versions:
- Getting Started
- Setup
- Breaking changes
- Breaking changes in 2.3
- Breaking changes in 2.2
- Breaking changes in 2.1
- Breaking changes in 2.0
- Removed features
- Network changes
- Multiple
path.data
striping - Mapping changes
- CRUD and routing changes
- Query DSL changes
- Search changes
- Aggregation changes
- Parent/Child changes
- Scripting changes
- Index API changes
- Snapshot and Restore changes
- Plugin and packaging changes
- Setting changes
- Stats, info, and
cat
changes - Java API changes
- API Conventions
- Document APIs
- Search APIs
- Aggregations
- Metrics Aggregations
- Avg Aggregation
- Cardinality Aggregation
- Extended Stats Aggregation
- Geo Bounds Aggregation
- Geo Centroid Aggregation
- Max Aggregation
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- Extended Stats Bucket Aggregation
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- Moving Average Aggregation
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- Bucket Script Aggregation
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- Serial Differencing Aggregation
- Caching heavy aggregations
- Returning only aggregation results
- Aggregation Metadata
- Metrics Aggregations
- Indices APIs
- Create Index
- Delete Index
- Get Index
- Indices Exists
- Open / Close Index API
- Put Mapping
- Get Mapping
- Get Field Mapping
- Types Exists
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analyzer
boost
coerce
copy_to
doc_values
dynamic
enabled
fielddata
format
geohash
geohash_precision
geohash_prefix
ignore_above
ignore_malformed
include_in_all
index
index_options
lat_lon
fields
norms
null_value
position_increment_gap
precision_step
properties
search_analyzer
similarity
store
term_vector
- Dynamic Mapping
- Transform
- Analysis
- Analyzers
- Tokenizers
- Token Filters
- Standard Token Filter
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- Length Token Filter
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- Unique Token Filter
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- Modules
- Index Modules
- Testing
- Glossary of terms
- Release Notes
- 2.3.5 Release Notes
- 2.3.4 Release Notes
- 2.3.3 Release Notes
- 2.3.2 Release Notes
- 2.3.1 Release Notes
- 2.3.0 Release Notes
- 2.2.2 Release Notes
- 2.2.1 Release Notes
- 2.2.0 Release Notes
- 2.1.2 Release Notes
- 2.1.1 Release Notes
- 2.1.0 Release Notes
- 2.0.2 Release Notes
- 2.0.1 Release Notes
- 2.0.0 Release Notes
- 2.0.0-rc1 Release Notes
- 2.0.0-beta2 Release Notes
- 2.0.0-beta1 Release Notes
WARNING: Version 2.3 of Elasticsearch has passed its EOL date.
This documentation is no longer being maintained and may be removed. If you are running this version, we strongly advise you to upgrade. For the latest information, see the current release documentation.
Count API
editCount API
editThe count API allows to easily execute a query and get the number of matches for that query. It can be executed across one or more indices and across one or more types. The query can either be provided using a simple query string as a parameter, or using the Query DSL defined within the request body. Here is an example:
$ curl -XGET 'http://localhost:9200/twitter/tweet/_count?q=user:kimchy' $ curl -XGET 'http://localhost:9200/twitter/tweet/_count' -d ' { "query" : { "term" : { "user" : "kimchy" } } }'
The query being sent in the body must be nested in a query
key, same as
the search api works
Both examples above do the same thing, which is count the number of tweets from the twitter index for a certain user. The result is:
{ "count" : 1, "_shards" : { "total" : 5, "successful" : 5, "failed" : 0 } }
The query is optional, and when not provided, it will use match_all
to
count all the docs.
Multi index, Multi type
editThe count API can be applied to multiple types in multiple indices.
Request Parameters
editWhen executing count using the query parameter q
, the query passed is
a query string using Lucene query parser. There are additional
parameters that can be passed:
Name | Description |
---|---|
|
The default field to use when no field prefix is defined within the query. |
|
The analyzer name to be used when analyzing the query string. |
|
The default operator to be used, can be |
|
If set to true will cause format based failures (like providing text to a numeric field) to be ignored. Defaults to false. |
|
Should terms be automatically lowercased or
not. Defaults to |
|
Should wildcard and prefix queries be analyzed or
not. Defaults to |
|
The maximum count for each shard, upon
reaching which the query execution will terminate early.
If set, the response will have a boolean field |
Request Body
editThe count can use the Query DSL within
its body in order to express the query that should be executed. The body
content can also be passed as a REST parameter named source
.
Both HTTP GET and HTTP POST can be used to execute count with body. Since not all clients support GET with body, POST is allowed as well.
Distributed
editThe count operation is broadcast across all shards. For each shard id group, a replica is chosen and executed against it. This means that replicas increase the scalability of count.
Routing
editThe routing value (a comma separated list of the routing values) can be specified to control which shards the count request will be executed on.