106 lines
2.9 KiB
Plaintext
106 lines
2.9 KiB
Plaintext
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[[search]]
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= Search APIs
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[partintro]
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--
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["float",id="search-multi-index"]
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== Multiple Indices
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All search APIs support execution across multiple indices, using simple
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`test1,test2,test3` notation (or `_all` for all indices). It also
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support wildcards, for example: `test*`, and the ability to "add" (`+`)
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and "remove" (`-`), for example: `+test*,-test3`.
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All multi indices API support the `ignore_indices` option. Setting it to
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`missing` will cause indices that do not exists to be ignored from the
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execution. By default, when its not set, the request will fail. Note,
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this feature is available since 0.20 version.
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[float]
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== Routing
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When executing a search, it will be broadcasted to all the index/indices
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shards (round robin between replicas). Which shards will be searched on
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can be controlled by providing the `routing` parameter. For example,
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when indexing tweets, the routing value can be the user name:
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[source,js]
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--------------------------------------------------
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$ curl -XPOST 'http://localhost:9200/twitter/tweet?routing=kimchy' -d '{
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"user" : "kimchy",
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"postDate" : "2009-11-15T14:12:12",
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"message" : "trying out Elastic Search"
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}
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'
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--------------------------------------------------
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In such a case, if we want to search only on the tweets for a specific
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user, we can specify it as the routing, resulting in the search hitting
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only the relevant shard:
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[source,js]
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--------------------------------------------------
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$ curl -XGET 'http://localhost:9200/twitter/tweet/_search?routing=kimchy' -d '{
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"query": {
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"filtered" : {
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"query" : {
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"query_string" : {
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"query" : "some query string here"
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}
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},
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"filter" : {
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"term" : { "user" : "kimchy" }
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}
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}
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}
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}
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'
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--------------------------------------------------
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The routing parameter can be multi valued represented as a comma
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separated string. This will result in hitting the relevant shards where
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the routing values match to.
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[float]
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== Stats Groups
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A search can be associated with stats groups, which maintains a
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statistics aggregation per group. It can later be retrieved using the
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<<indices-stats,indices stats>> API
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specifically. For example, here is a search body request that associate
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the request with two different groups:
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[source,js]
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--------------------------------------------------
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{
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"query" : {
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"match_all" : {}
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},
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"stats" : ["group1", "group2"]
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}
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--------------------------------------------------
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--
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include::search/search.asciidoc[]
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include::search/uri-request.asciidoc[]
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include::search/request-body.asciidoc[]
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include::search/facets.asciidoc[]
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include::search/suggesters.asciidoc[]
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include::search/multi-search.asciidoc[]
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include::search/count.asciidoc[]
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include::search/validate.asciidoc[]
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include::search/explain.asciidoc[]
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include::search/percolate.asciidoc[]
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include::search/more-like-this.asciidoc[]
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