Im using _msearch api to send multiple queries to elastic.
I only need to know how many hits generates each query.
What I understood, you can use the size parameter by setting it to "0" in order to only get the count. However, I still get results with all the found documents. Here is my query:
{"index":"myindex","type":"things","from":0,,"size":0}
{"query":{"bool":{"must":[{"match_all":{}}],"must_not":[],{"match":
{"firstSearch":true}}]}}}, "size" : 0}
{"index":"myindex","type":"things","from":0,,"size":0}
{"query":{"bool":{"must":[{"match_all":{}}],"must_not":[],{"match":
{"secondSearch":true}}]}}}, "size" : 0}
Im using curl to get the results, this way:
curl -H "Content-Type: application/x-ndjson" -XGET localhost:9200/_msearch?pretty=1 --data-binary "#requests"; echo
Setting size as zero signifies that you are asking Elasticsearch to return all the documents which satisfies the query.
You can let Elasticsearch know that you do not need the documents by sending "_source" as false.
Example:
{
"query": {},
"_source": false,
}
You can use
GET /indexname/type/_count?
{ "query":
{ "match_all": {} }
}
please read more document: https://www.elastic.co/guide/en/elasticsearch/reference/current/search-count.html
I am working with postman and i want to try using getting all data from my index, now when using curl
curl -X GET "localhost:9200/_search" -H 'Content-Type: application/json' -d'
{
"query": {
"match_all": {}
}
}
but i want to write a search and return all data, my index name is tourdata and type is tours
127.0.0.1:9200/tourdata/tours/_search
how do i continue
So i found that i need to add size to my query parameter, This worked for me.
127.0.0.1:9200/tourdata/tours/_search?size=7000&pretty=true
Elastic-search has from/size parameter and this size is 10 by default. How to get all the results without pagination?
first get count of results . you can get it by count api. the put n into following method of QueryBuilder.
CountResponse response = client.prepareCount("test")
.setQuery(termQuery("_type", "type1"))
.execute()
.actionGet();
then call
n=response.getCount();
you can use setSize(n).
for non java use like this curl request.
curl -XGET 'http://localhost:9200/twitter/tweet/_count' -d '
{
"query" : {
"term" : { "user" : "kimchy" }
}
}'
more on this can be found on this link.
http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/search-count.html
I know one can delete all documents from a certain type via deleteByQuery.
Example:
curl -XDELETE 'http://localhost:9200/twitter/tweet/_query' -d '{
"query" : {
"term" : { "user" : "kimchy" }
}
}'
But i have NO term and simply want to delete all documents from that type, no matter what term. What is best practice to achieve this? Empty term does not work.
Link to deleteByQuery
I believe if you combine the delete by query with a match all it should do what you are looking for, something like this (using your example):
curl -XDELETE 'http://localhost:9200/twitter/tweet/_query' -d '{
"query" : {
"match_all" : {}
}
}'
Or you could just delete the type:
curl -XDELETE http://localhost:9200/twitter/tweet
Note: XDELETE is deprecated for later versions of ElasticSearch
The Delete-By-Query plugin has been removed in favor of a new Delete By Query API implementation in core. Read here
curl -XPOST 'localhost:9200/twitter/tweet/_delete_by_query?conflicts=proceed&pretty' -H 'Content-Type: application/json' -d'
{
"query": {
"match_all": {}
}
}'
From ElasticSearch 5.x, delete_by_query API is there by default
POST: http://localhost:9200/index/type/_delete_by_query
{
"query": {
"match_all": {}
}
}
You can delete documents from type with following query:
POST /index/type/_delete_by_query
{
"query" : {
"match_all" : {}
}
}
I tested this query in Kibana and Elastic 5.5.2
Torsten Engelbrecht's comment in John Petrones answer expanded:
curl -XDELETE 'http://localhost:9200/twitter/tweet/_query' -d
'{
"query":
{
"match_all": {}
}
}'
(I did not want to edit John's reply, since it got upvotes and is set as answer, and I might have introduced an error)
Starting from Elasticsearch 2.x delete is not anymore allowed, since documents remain in the index causing index corruption.
Since ElasticSearch 7.x, delete-by-query plugin was removed in favor of new Delete By Query API.
The curl option:
curl -X POST "localhost:9200/my-index/_delete_by_query" -H 'Content-Type: application/json' -d' { "query": { "match_all":{} } } '
Or in Kibana
POST /my-index/_delete_by_query
{
"query": {
"match_all":{}
}
}
The above answers no longer work with ES 6.2.2 because of Strict Content-Type Checking for Elasticsearch REST Requests. The curl command which I ended up using is this:
curl -H'Content-Type: application/json' -XPOST 'localhost:9200/yourindex/_doc/_delete_by_query?conflicts=proceed' -d' { "query": { "match_all": {} }}'
In Kibana Console:
POST calls-xin-test-2/_delete_by_query
{
"query": {
"match_all": {}
}
}
(Reputation not high enough to comment)
The second part of John Petrone's answer works - no query needed. It will delete the type and all documents contained in that type, but that can just be re-created whenever you index a new document to that type.
Just to clarify:
$ curl -XDELETE 'http://localhost:9200/twitter/tweet'
Note: this does delete the mapping! But as mentioned before, it can be easily re-mapped by creating a new document.
Note for ES2+
Starting with ES 1.5.3 the delete-by-query API is deprecated, and is completely removed since ES 2.0
Instead of the API, the Delete By Query is now a plugin.
In order to use the Delete By Query plugin you must install the plugin on all nodes of the cluster:
sudo bin/plugin install delete-by-query
All of the nodes must be restarted after the installation.
The usage of the plugin is the same as the old API. You don't need to change anything in your queries - this plugin will just make them work.
*For complete information regarding WHY the API was removed you can read more here.
You have these alternatives:
1) Delete a whole index:
curl -XDELETE 'http://localhost:9200/indexName'
example:
curl -XDELETE 'http://localhost:9200/mentorz'
For more details you can find here -https://www.elastic.co/guide/en/elasticsearch/reference/current/indices-delete-index.html
2) Delete by Query to those that match:
curl -XDELETE 'http://localhost:9200/mentorz/users/_query' -d
'{
"query":
{
"match_all": {}
}
}'
*Here mentorz is an index name and users is a type
I'm using elasticsearch 7.5 and when I use
curl -XPOST 'localhost:9200/materials/_delete_by_query?conflicts=proceed&pretty' -d'
{
"query": {
"match_all": {}
}
}'
which will throw below error.
{
"error" : "Content-Type header [application/x-www-form-urlencoded] is not supported",
"status" : 406
}
I also need to add extra -H 'Content-Type: application/json' header in the request to make it works.
curl -XPOST 'localhost:9200/materials/_delete_by_query?conflicts=proceed&pretty' -H 'Content-Type: application/json' -d'
{
"query": {
"match_all": {}
}
}'
{
"took" : 465,
"timed_out" : false,
"total" : 2275,
"deleted" : 2275,
"batches" : 3,
"version_conflicts" : 0,
"noops" : 0,
"retries" : {
"bulk" : 0,
"search" : 0
},
"throttled_millis" : 0,
"requests_per_second" : -1.0,
"throttled_until_millis" : 0,
"failures" : [ ]
}
Just to add couple cents to this.
The "delete_by_query" mentioned at the top is still available as a plugin in elasticsearch 2.x.
Although in the latest upcoming version 5.x it will be replaced by
"delete by query api"
Elasticsearch 2.3 the option
action.destructive_requires_name: true
in elasticsearch.yml do the trip
curl -XDELETE http://localhost:9200/twitter/tweet
For future readers:
in Elasticsearch 7.x there's effectively one type per index - types are hidden
you can delete by query, but if you want remove everything you'll be much better off removing and re-creating the index. That's because deletes are only soft deletes under the hood, until the trigger Lucene segment merges*, which can be expensive if the index is large. Meanwhile, removing an index is almost instant: remove some files on disk and a reference in the cluster state.
* The video/slides are about Solr, but things work exactly the same in Elasticsearch, this is Lucene-level functionality.
If you want to delete document according to a date.
You can use kibana console (v.6.1.2)
POST index_name/_delete_by_query
{
"query" : {
"range" : {
"sendDate" : {
"lte" : "2018-03-06"
}
}
}
}
I have a question which is not quite clear for me when reading the documentation.
What exactly is the difference between the _search and the _query Endpoint?
Thanks a lot!
Matthias
The _search API endpoint allows you to execute a search query and get back search hits that match the query. The query can either be provided using a simple query string as a parameter, or using a request body.
curl -XGET 'http://localhost:9200/twitter/tweet,user/_search?q=user:kimchy'
curl -XGET 'http://localhost:9200/twitter/tweet/_search' -d '{
"query" : {
"term" : { "user" : "kimchy" }
}
}
'
The _query endpoint, is for delete by query only (I think it only has handlers for DELETE, not POST, or GET).
curl -XDELETE 'http://localhost:9200/twitter/tweet/_query?q=user:kimchy'
You can learn more here:
Elasticsearch Doco