parent
9eba7f39b0
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771e9f142a
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@ -6,7 +6,7 @@ A multi-bucket aggregation that creates composite buckets from different sources
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Unlike the other `multi-bucket` aggregation the `composite` aggregation can be used
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Unlike the other `multi-bucket` aggregation the `composite` aggregation can be used
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to paginate **all** buckets from a multi-level aggregation efficiently. This aggregation
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to paginate **all** buckets from a multi-level aggregation efficiently. This aggregation
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provides a way to stream **all** buckets of a specific aggregation similarly to what
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provides a way to stream **all** buckets of a specific aggregation similarly to what
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<<request-body-search-scroll, scroll>> does for documents.
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<<scroll-search-results, scroll>> does for documents.
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The composite buckets are built from the combinations of the
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The composite buckets are built from the combinations of the
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values extracted/created for each document and each combination is considered as
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values extracted/created for each document and each combination is considered as
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@ -207,7 +207,7 @@ include::{es-repo-dir}/rest-api/common-parms.asciidoc[tag=routing]
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`scroll`::
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`scroll`::
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(Optional, <<time-units,time value>>)
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(Optional, <<time-units,time value>>)
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Period to retain the <<scroll-search-context,search context>> for scrolling. See
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Period to retain the <<scroll-search-context,search context>> for scrolling. See
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<<request-body-search-scroll>>.
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<<scroll-search-results>>.
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include::{es-repo-dir}/rest-api/common-parms.asciidoc[tag=scroll_size]
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include::{es-repo-dir}/rest-api/common-parms.asciidoc[tag=scroll_size]
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@ -204,7 +204,7 @@ include::{es-repo-dir}/rest-api/common-parms.asciidoc[tag=routing]
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`scroll`::
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`scroll`::
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(Optional, <<time-units,time value>>)
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(Optional, <<time-units,time value>>)
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Period to retain the <<scroll-search-context,search context>> for scrolling. See
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Period to retain the <<scroll-search-context,search context>> for scrolling. See
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<<request-body-search-scroll>>.
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<<scroll-search-results>>.
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include::{es-repo-dir}/rest-api/common-parms.asciidoc[tag=scroll_size]
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include::{es-repo-dir}/rest-api/common-parms.asciidoc[tag=scroll_size]
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@ -9,7 +9,7 @@ Elasticsearch is designed as a search engine, which makes it very good at
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getting back the top documents that match a query. However, it is not as good
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getting back the top documents that match a query. However, it is not as good
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for workloads that fall into the database domain, such as retrieving all
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for workloads that fall into the database domain, such as retrieving all
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documents that match a particular query. If you need to do this, make sure to
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documents that match a particular query. If you need to do this, make sure to
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use the <<request-body-search-scroll,Scroll>> API.
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use the <<scroll-search-results,Scroll>> API.
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[discrete]
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[discrete]
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[[maximum-document-size]]
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[[maximum-document-size]]
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@ -155,7 +155,7 @@ specific index module:
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The maximum value of `from + size` for searches to this index. Defaults to
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The maximum value of `from + size` for searches to this index. Defaults to
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`10000`. Search requests take heap memory and time proportional to
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`10000`. Search requests take heap memory and time proportional to
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`from + size` and this limits that memory. See
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`from + size` and this limits that memory. See
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<<request-body-search-scroll,Scroll>> or <<request-body-search-search-after,Search After>> for a more efficient alternative
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<<scroll-search-results,Scroll>> or <<search-after,Search After>> for a more efficient alternative
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to raising this.
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to raising this.
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`index.max_inner_result_window`::
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`index.max_inner_result_window`::
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@ -290,7 +290,7 @@ handling network delays:
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By default, {es} reduces the number of network roundtrips between remote
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By default, {es} reduces the number of network roundtrips between remote
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clusters. This reduces the impact of network delays on search speed. However,
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clusters. This reduces the impact of network delays on search speed. However,
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{es} can't reduce network roundtrips for large search requests, such as those
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{es} can't reduce network roundtrips for large search requests, such as those
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including a <<request-body-search-scroll, scroll>> or
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including a <<scroll-search-results, scroll>> or
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<<request-body-search-inner-hits,inner hits>>.
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<<request-body-search-inner-hits,inner hits>>.
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+
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+
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See <<ccs-min-roundtrips>> to learn how this option works.
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See <<ccs-min-roundtrips>> to learn how this option works.
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@ -111,11 +111,11 @@ See <<request-body-search-script-fields>>.
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[role="exclude",id="search-request-scroll"]
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[role="exclude",id="search-request-scroll"]
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=== Scroll parameter for request body search API
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=== Scroll parameter for request body search API
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See <<request-body-search-scroll>>.
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See <<scroll-search-results>>.
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[role="exclude",id="search-request-search-after"]
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[role="exclude",id="search-request-search-after"]
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=== Search after parameter for request body search API
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=== Search after parameter for request body search API
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See <<request-body-search-search-after>>.
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See <<search-after>>.
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[role="exclude",id="search-request-search-type"]
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[role="exclude",id="search-request-search-type"]
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=== Search type parameter for request body search API
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=== Search type parameter for request body search API
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@ -832,7 +832,7 @@ See <<settings>>.
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[role="exclude",id="scan-scroll"]
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[role="exclude",id="scan-scroll"]
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=== Scan and scroll
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=== Scan and scroll
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See <<request-body-search-scroll>>.
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See <<scroll-search-results>>.
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[role="exclude",id="mapping-dynamic-mapping"]
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[role="exclude",id="mapping-dynamic-mapping"]
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=== Dynamic mapping
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=== Dynamic mapping
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@ -959,6 +959,16 @@ See <<highlighting>>.
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See <<how-es-highlighters-work-internally>>.
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See <<how-es-highlighters-work-internally>>.
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[role="exclude",id="request-body-search-scroll"]
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==== Scroll
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See <<scroll-search-results>>.
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[role="exclude",id="request-body-search-search-after"]
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==== Search After
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See <<search-after>>.
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[role="exclude",id="request-body-search-sort"]
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[role="exclude",id="request-body-search-sort"]
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==== Sort
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==== Sort
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@ -129,7 +129,7 @@ query get skipped.
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* `ccs_minimize_roundtrips` defaults to `false`, which is also the only
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* `ccs_minimize_roundtrips` defaults to `false`, which is also the only
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supported value
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supported value
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WARNING: Async search does not support <<request-body-search-scroll,scroll>>
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WARNING: Async search does not support <<scroll-search-results,scroll>>
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nor search requests that only include the <<search-suggesters,suggest section>>.
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nor search requests that only include the <<search-suggesters,suggest section>>.
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{ccs} is supported only with <<ccs-min-roundtrips,`ccs_minimize_roundtrips`>>
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{ccs} is supported only with <<ccs-min-roundtrips,`ccs_minimize_roundtrips`>>
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set to `false`.
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set to `false`.
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@ -5,7 +5,7 @@
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++++
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++++
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Clears the search context and results for a
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Clears the search context and results for a
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<<request-body-search-scroll,scrolling search>>.
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<<scroll-search-results,scrolling search>>.
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////
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////
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[source,console]
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[source,console]
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@ -1,8 +1,7 @@
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[discrete]
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[[paginate-search-results]]
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[[paginate-search-results]]
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=== Paginate search results
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== Paginate search results
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By default, the search API returns the top 10 matching documents.
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By default, the <<search-search,search API>> returns the top 10 matching documents.
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To paginate through a larger set of results, you can use the search API's `size`
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To paginate through a larger set of results, you can use the search API's `size`
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and `from` parameters. The `size` parameter is the number of matching documents
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and `from` parameters. The `size` parameter is the number of matching documents
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@ -40,10 +39,14 @@ results must then be combined and sorted to ensure that the overall sort order
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is correct.
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is correct.
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As an alternative to deep paging, we recommend using
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As an alternative to deep paging, we recommend using
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<<request-body-search-scroll,scroll>> or the
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<<scroll-search-results,scroll>> or the
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<<request-body-search-search-after,`search_after`>> parameter.
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<<search-after,`search_after`>> parameter.
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WARNING: {es} uses Lucene's internal doc IDs as tie-breakers. These internal
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WARNING: {es} uses Lucene's internal doc IDs as tie-breakers. These internal
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doc IDs can be completely different across replicas of the same
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doc IDs can be completely different across replicas of the same
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data. When paginating, you might occasionally see that documents with the same
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data. When paginating, you might occasionally see that documents with the same
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sort values are not ordered consistently.
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sort values are not ordered consistently.
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include::request/scroll.asciidoc[]
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include::request/search-after.asciidoc[]
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@ -139,9 +139,20 @@ include::request/rescore.asciidoc[]
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include::request/script-fields.asciidoc[]
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include::request/script-fields.asciidoc[]
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include::request/scroll.asciidoc[]
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[[request-body-search-scroll]]
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==== Scroll
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include::request/search-after.asciidoc[]
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See <<scroll-search-results>>.
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[[_clear_scroll_api]]
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===== Clear scroll API
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See <<clear-scroll-api>>.
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[[request-body-search-search-after]]
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==== Search After
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See <<search-after>>.
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include::request/search-type.asciidoc[]
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include::request/search-type.asciidoc[]
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@ -116,8 +116,8 @@ The `max_concurrent_group_searches` request parameter can be used to control
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the maximum number of concurrent searches allowed in this phase.
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the maximum number of concurrent searches allowed in this phase.
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The default is based on the number of data nodes and the default search thread pool size.
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The default is based on the number of data nodes and the default search thread pool size.
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WARNING: `collapse` cannot be used in conjunction with <<request-body-search-scroll, scroll>>,
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WARNING: `collapse` cannot be used in conjunction with <<scroll-search-results, scroll>>,
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<<request-body-search-rescore, rescore>> or <<request-body-search-search-after, search after>>.
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<<request-body-search-rescore, rescore>> or <<search-after, search after>>.
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[discrete]
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[discrete]
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[[second-level-of-collapsing]]
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[[second-level-of-collapsing]]
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@ -1,5 +1,6 @@
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[[request-body-search-scroll]]
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[discrete]
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==== Scroll
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[[scroll-search-results]]
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=== Scroll search results
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While a `search` request returns a single ``page'' of results, the `scroll`
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While a `search` request returns a single ``page'' of results, the `scroll`
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API can be used to retrieve large numbers of results (or even all results)
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API can be used to retrieve large numbers of results (or even all results)
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@ -102,8 +103,9 @@ GET /_search?scroll=1m
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--------------------------------------------------
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--------------------------------------------------
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// TEST[setup:twitter]
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// TEST[setup:twitter]
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[discrete]
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[[scroll-search-context]]
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[[scroll-search-context]]
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===== Keeping the search context alive
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==== Keeping the search context alive
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A scroll returns all the documents which matched the search at the time of the
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A scroll returns all the documents which matched the search at the time of the
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initial search request. It ignores any subsequent changes to these documents.
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initial search request. It ignores any subsequent changes to these documents.
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@ -149,7 +151,9 @@ You can check how many search contexts are open with the
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GET /_nodes/stats/indices/search
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GET /_nodes/stats/indices/search
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---------------------------------------
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---------------------------------------
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===== Clear scroll API
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[discrete]
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[[clear-scroll]]
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==== Clear scroll
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Search context are automatically removed when the `scroll` timeout has been
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Search context are automatically removed when the `scroll` timeout has been
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exceeded. However keeping scrolls open has a cost, as discussed in the
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exceeded. However keeping scrolls open has a cost, as discussed in the
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@ -196,8 +200,9 @@ DELETE /_search/scroll/DXF1ZXJ5QW5kRmV0Y2gBAAAAAAAAAD4WYm9laVYtZndUQlNsdDcwakFMN
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---------------------------------------
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---------------------------------------
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// TEST[catch:missing]
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// TEST[catch:missing]
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[discrete]
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[[sliced-scroll]]
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[[sliced-scroll]]
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===== Sliced Scroll
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==== Sliced Scroll
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For scroll queries that return a lot of documents it is possible to split the scroll in multiple slices which
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For scroll queries that return a lot of documents it is possible to split the scroll in multiple slices which
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can be consumed independently:
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can be consumed independently:
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@ -1,9 +1,10 @@
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[[request-body-search-search-after]]
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[discrete]
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==== Search After
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[[search-after]]
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=== Search after
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Pagination of results can be done by using the `from` and `size` but the cost becomes prohibitive when the deep pagination is reached.
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Pagination of results can be done by using the `from` and `size` but the cost becomes prohibitive when the deep pagination is reached.
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The `index.max_result_window` which defaults to 10,000 is a safeguard, search requests take heap memory and time proportional to `from + size`.
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The `index.max_result_window` which defaults to 10,000 is a safeguard, search requests take heap memory and time proportional to `from + size`.
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The <<request-body-search-scroll,Scroll>> api is recommended for efficient deep scrolling but scroll contexts are costly and it is not
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The <<scroll-search-results,scroll>> API is recommended for efficient deep scrolling but scroll contexts are costly and it is not
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recommended to use it for real time user requests.
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recommended to use it for real time user requests.
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The `search_after` parameter circumvents this problem by providing a live cursor.
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The `search_after` parameter circumvents this problem by providing a live cursor.
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The idea is to use the results from the previous page to help the retrieval of the next page.
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The idea is to use the results from the previous page to help the retrieval of the next page.
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NOTE: `_doc` has no real use-case besides being the most efficient sort order.
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NOTE: `_doc` has no real use-case besides being the most efficient sort order.
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So if you don't care about the order in which documents are returned, then you
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So if you don't care about the order in which documents are returned, then you
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should sort by `_doc`. This especially helps when <<request-body-search-scroll,scrolling>>.
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should sort by `_doc`. This especially helps when <<scroll-search-results,scrolling>>.
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[discrete]
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[discrete]
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=== Sort Values
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=== Sort Values
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@ -4,7 +4,7 @@
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<titleabbrev>Scroll</titleabbrev>
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<titleabbrev>Scroll</titleabbrev>
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++++
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++++
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Retrieves the next batch of results for a <<request-body-search-scroll,scrolling
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Retrieves the next batch of results for a <<scroll-search-results,scrolling
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search>>.
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search>>.
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////
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////
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@ -48,7 +48,7 @@ deprecated:[7.0.0]
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==== {api-description-title}
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==== {api-description-title}
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You can use the scroll API to retrieve large sets of results from a single
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You can use the scroll API to retrieve large sets of results from a single
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<<request-body-search-scroll,scrolling search>> request.
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<<scroll-search-results,scrolling search>> request.
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The scroll API requires a scroll ID. To get a scroll ID, submit a
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The scroll API requires a scroll ID. To get a scroll ID, submit a
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<<search-search,search API>> request that includes an argument for the
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<<search-search,search API>> request that includes an argument for the
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You can also use the scroll API to specify a new `scroll` parameter that extends
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You can also use the scroll API to specify a new `scroll` parameter that extends
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or shortens the retention period for the search context.
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or shortens the retention period for the search context.
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See <<request-body-search-scroll>>.
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See <<scroll-search-results>>.
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IMPORTANT: Results from a scrolling search reflect the state of the index at the
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IMPORTANT: Results from a scrolling search reflect the state of the index at the
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time of the initial search request. Subsequent indexing or document changes only
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time of the initial search request. Subsequent indexing or document changes only
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@ -86,7 +86,7 @@ the <<scroll-api-scroll-id-param,`scroll_id` request body parameter>>.
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`scroll`::
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`scroll`::
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(Optional, <<time-units,time value>>)
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(Optional, <<time-units,time value>>)
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Period to retain the <<scroll-search-context,search context>> for scrolling. See
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Period to retain the <<scroll-search-context,search context>> for scrolling. See
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<<request-body-search-scroll>>.
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<<scroll-search-results>>.
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+
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+
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This value overrides the duration set by the original search API request's
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This value overrides the duration set by the original search API request's
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`scroll` parameter.
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`scroll` parameter.
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@ -118,7 +118,7 @@ Defaults to `false`.
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`scroll`::
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`scroll`::
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(Optional, <<time-units,time value>>)
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(Optional, <<time-units,time value>>)
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Period to retain the <<scroll-search-context,search context>> for scrolling. See
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Period to retain the <<scroll-search-context,search context>> for scrolling. See
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<<request-body-search-scroll>>.
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<<scroll-search-results>>.
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+
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+
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This value overrides the duration set by the original search API request's
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This value overrides the duration set by the original search API request's
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`scroll` parameter.
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`scroll` parameter.
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@ -292,10 +292,10 @@ GET /*/_search
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}
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}
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----
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----
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include::request/from-size.asciidoc[]
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include::search-fields.asciidoc[]
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include::search-fields.asciidoc[]
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include::request/collapse.asciidoc[]
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include::request/collapse.asciidoc[]
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include::request/highlighting.asciidoc[]
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include::request/highlighting.asciidoc[]
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include::paginate-search-results.asciidoc[]
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include::request/sort.asciidoc[]
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include::request/sort.asciidoc[]
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include::{es-repo-dir}/async-search.asciidoc[]
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include::{es-repo-dir}/async-search.asciidoc[]
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include::{es-repo-dir}/modules/cross-cluster-search.asciidoc[]
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include::{es-repo-dir}/modules/cross-cluster-search.asciidoc[]
|
||||||
|
|
|
@ -101,8 +101,8 @@ results must then be combined and sorted to ensure that the overall order is
|
||||||
correct.
|
correct.
|
||||||
|
|
||||||
As an alternative to deep paging, we recommend using
|
As an alternative to deep paging, we recommend using
|
||||||
<<request-body-search-scroll,scroll>> or the
|
<<scroll-search-results,scroll>> or the
|
||||||
<<request-body-search-search-after,`search_after`>> parameter.
|
<<search-after,`search_after`>> parameter.
|
||||||
--
|
--
|
||||||
|
|
||||||
`ignore_throttled`::
|
`ignore_throttled`::
|
||||||
|
@ -159,7 +159,7 @@ include::{es-repo-dir}/rest-api/common-parms.asciidoc[tag=routing]
|
||||||
`scroll`::
|
`scroll`::
|
||||||
(Optional, <<time-units,time value>>)
|
(Optional, <<time-units,time value>>)
|
||||||
Period to retain the <<scroll-search-context,search context>> for scrolling. See
|
Period to retain the <<scroll-search-context,search context>> for scrolling. See
|
||||||
<<request-body-search-scroll>>.
|
<<scroll-search-results>>.
|
||||||
+
|
+
|
||||||
By default, this value cannot exceed `1d` (24 hours). You can change
|
By default, this value cannot exceed `1d` (24 hours). You can change
|
||||||
this limit using the `search.max_keep_alive` cluster-level setting.
|
this limit using the `search.max_keep_alive` cluster-level setting.
|
||||||
|
@ -185,8 +185,8 @@ results must then be combined and sorted to ensure that the overall order is
|
||||||
correct.
|
correct.
|
||||||
|
|
||||||
As an alternative to deep paging, we recommend using
|
As an alternative to deep paging, we recommend using
|
||||||
<<request-body-search-scroll,scroll>> or the
|
<<scroll-search-results,scroll>> or the
|
||||||
<<request-body-search-search-after,`search_after`>> parameter.
|
<<search-after,`search_after`>> parameter.
|
||||||
|
|
||||||
If the <<search-api-scroll-query-param,`scroll` parameter>> is specified, this
|
If the <<search-api-scroll-query-param,`scroll` parameter>> is specified, this
|
||||||
value cannot be `0`.
|
value cannot be `0`.
|
||||||
|
@ -322,8 +322,8 @@ results must then be combined and sorted to ensure that the overall order is
|
||||||
correct.
|
correct.
|
||||||
|
|
||||||
As an alternative to deep paging, we recommend using
|
As an alternative to deep paging, we recommend using
|
||||||
<<request-body-search-scroll,scroll>> or the
|
<<scroll-search-results,scroll>> or the
|
||||||
<<request-body-search-search-after,`search_after`>> parameter.
|
<<search-after,`search_after`>> parameter.
|
||||||
--
|
--
|
||||||
|
|
||||||
[[request-body-search-query]]
|
[[request-body-search-query]]
|
||||||
|
@ -351,8 +351,8 @@ results must then be combined and sorted to ensure that the overall order is
|
||||||
correct.
|
correct.
|
||||||
|
|
||||||
As an alternative to deep paging, we recommend using
|
As an alternative to deep paging, we recommend using
|
||||||
<<request-body-search-scroll,scroll>> or the
|
<<scroll-search-results,scroll>> or the
|
||||||
<<request-body-search-search-after,`search_after`>> parameter.
|
<<search-after,`search_after`>> parameter.
|
||||||
|
|
||||||
If the <<search-api-scroll-query-param,`scroll` parameter>> is specified, this
|
If the <<search-api-scroll-query-param,`scroll` parameter>> is specified, this
|
||||||
value cannot be `0`.
|
value cannot be `0`.
|
||||||
|
@ -428,7 +428,7 @@ Identifier for the search and its <<scroll-search-context,search context>>.
|
||||||
+
|
+
|
||||||
You can use this scroll ID with the <<scroll-api,scroll API>> to retrieve the
|
You can use this scroll ID with the <<scroll-api,scroll API>> to retrieve the
|
||||||
next batch of search results for the request. See
|
next batch of search results for the request. See
|
||||||
<<request-body-search-scroll>>.
|
<<scroll-search-results>>.
|
||||||
+
|
+
|
||||||
This parameter is only returned if the <<search-api-scroll-query-param,`scroll`
|
This parameter is only returned if the <<search-api-scroll-query-param,`scroll`
|
||||||
query parameter>> is specified in the request.
|
query parameter>> is specified in the request.
|
||||||
|
|
|
@ -337,7 +337,7 @@ Which looks like:
|
||||||
Note that the `columns` object is only part of the first page.
|
Note that the `columns` object is only part of the first page.
|
||||||
|
|
||||||
You've reached the last page when there is no `cursor` returned
|
You've reached the last page when there is no `cursor` returned
|
||||||
in the results. Like Elasticsearch's <<request-body-search-scroll,scroll>>,
|
in the results. Like Elasticsearch's <<scroll-search-results,scroll>>,
|
||||||
SQL may keep state in Elasticsearch to support the cursor. Unlike
|
SQL may keep state in Elasticsearch to support the cursor. Unlike
|
||||||
scroll, receiving the last page is enough to guarantee that the
|
scroll, receiving the last page is enough to guarantee that the
|
||||||
Elasticsearch state is cleared.
|
Elasticsearch state is cleared.
|
||||||
|
|
|
@ -49,7 +49,7 @@ Which returns:
|
||||||
--------------------------------------------------
|
--------------------------------------------------
|
||||||
|
|
||||||
Which is the request that SQL will run to provide the results.
|
Which is the request that SQL will run to provide the results.
|
||||||
In this case, SQL will use the <<request-body-search-scroll,scroll>>
|
In this case, SQL will use the <<scroll-search-results,scroll>>
|
||||||
API. If the result contained an aggregation then SQL would use
|
API. If the result contained an aggregation then SQL would use
|
||||||
the normal <<search-request-body,search>> API.
|
the normal <<search-request-body,search>> API.
|
||||||
|
|
||||||
|
|
|
@ -1,7 +1,7 @@
|
||||||
{
|
{
|
||||||
"clear_scroll":{
|
"clear_scroll":{
|
||||||
"documentation":{
|
"documentation":{
|
||||||
"url":"https://www.elastic.co/guide/en/elasticsearch/reference/master/search-request-body.html#_clear_scroll_api",
|
"url":"https://www.elastic.co/guide/en/elasticsearch/reference/current/clear-scroll-api.html",
|
||||||
"description":"Explicitly clears the search context for a scroll."
|
"description":"Explicitly clears the search context for a scroll."
|
||||||
},
|
},
|
||||||
"stability":"stable",
|
"stability":"stable",
|
||||||
|
|
Loading…
Reference in New Issue