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Migrated documentation into the main repo
2013-08-29 07:24:34 +08:00
[[mapping-fields]]
[DOCS] Fix metadata field refs (#60764)
2020-08-06 01:21:00 +08:00
== Metadata fields
Migrated documentation into the main repo
2013-08-29 07:24:34 +08:00
Remove TypeFieldMapper (#62838) We don't need a special TypeFieldMapper for anything in particular; all access to the type field can be done via a TypeFieldType that issues appropriate deprecation warnings. Relates to #41059
2020-09-30 22:47:29 +08:00
Each document has metadata associated with it, such as the `_index`
[DOCS] Fix double spaces (#71082)
2021-03-31 21:57:47 +08:00
and `_id` metadata fields. The behavior of some of these metadata
Remove TypeFieldMapper (#62838) We don't need a special TypeFieldMapper for anything in particular; all access to the type field can be done via a TypeFieldType that issues appropriate deprecation warnings. Relates to #41059
2020-09-30 22:47:29 +08:00
fields can be customized when a mapping is created.
Migrated documentation into the main repo
2013-08-29 07:24:34 +08:00
[DOCS] Swap `[float]` for `[discrete]` (#60124) Changes instances of `[float]` in our docs for `[discrete]`. Asciidoctor prefers the `[discrete]` tag for floating headings: https://asciidoctor.org/docs/asciidoc-asciidoctor-diffs/#blocks
2020-07-23 23:48:22 +08:00
[discrete]
[DOCS] Fix metadata field refs (#60764)
2020-08-06 01:21:00 +08:00
=== Identity metadata fields
Migrated documentation into the main repo
2013-08-29 07:24:34 +08:00
Docs: Refactored the mapping meta-fields docs
2015-07-20 07:24:29 +08:00
[horizontal]
<<mapping-index-field,`_index`>>::
The index to which the document belongs.
<<mapping-id-field,`_id`>>::
The document's ID.
[DOCS] Swap `[float]` for `[discrete]` (#60124) Changes instances of `[float]` in our docs for `[discrete]`. Asciidoctor prefers the `[discrete]` tag for floating headings: https://asciidoctor.org/docs/asciidoc-asciidoctor-diffs/#blocks
2020-07-23 23:48:22 +08:00
[discrete]
[DOCS] Fix metadata field refs (#60764)
2020-08-06 01:21:00 +08:00
=== Document source metadata fields
Docs: Mapping docs completely rewritten for 2.0
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Docs: Refactored the mapping meta-fields docs
2015-07-20 07:24:29 +08:00
<<mapping-source-field,`_source`>>::
The original JSON representing the body of the document.
Docs: Another bad asciidoc link
2015-08-16 00:22:22 +08:00
{plugins}/mapper-size.html[`_size`]::
Docs: Mapping docs completely rewritten for 2.0
2015-08-06 23:24:29 +08:00
Docs: Prepare plugin and integration docs for 2.0 * Centralised plugin docs in docs/plugins/ * Moved integrations into same docs * Moved community clients into the clients section of the docs * Removed docs/community Closes #11734 Closes #11724 Closes #11636 Closes #11635 Closes #11632 Closes #11630 Closes #12046 Closes #12438 Closes #12579
2015-08-16 00:00:55 +08:00
The size of the `_source` field in bytes, provided by the
Docs: Another bad asciidoc link
2015-08-16 00:25:34 +08:00
{plugins}/mapper-size.html[`mapper-size` plugin].
Docs: Mapping docs completely rewritten for 2.0
2015-08-06 23:24:29 +08:00
Fix typo in fields doc (#64600)
2020-11-05 01:51:14 +08:00
[discrete]
Add doc_count field mapper (#64503) Bucket aggregations compute bucket doc_count values by incrementing the doc_count by 1 for every document collected in the bucket. When using summary fields (such as aggregate_metric_double) one field may represent more than one document. To provide this functionality we have implemented a new field mapper (named doc_count field mapper). This field is a positive integer representing the number of documents aggregated in a single summary field. Bucket aggregations will check if a field of type doc_count exists in a document and will take this value into consideration when computing doc counts.
2020-11-03 23:47:17 +08:00
=== Doc count metadata field
<<mapping-doc-count-field,`_doc_count`>>::
A custom field used for storing doc counts when a document represents pre-aggregated data.
[DOCS] Swap `[float]` for `[discrete]` (#60124) Changes instances of `[float]` in our docs for `[discrete]`. Asciidoctor prefers the `[discrete]` tag for floating headings: https://asciidoctor.org/docs/asciidoc-asciidoctor-diffs/#blocks
2020-07-23 23:48:22 +08:00
[discrete]
[DOCS] Fix metadata field refs (#60764)
2020-08-06 01:21:00 +08:00
=== Indexing metadata fields
Docs: Mapping docs completely rewritten for 2.0
2015-08-06 23:24:29 +08:00
Docs: Refactored the mapping meta-fields docs
2015-07-20 07:24:29 +08:00
<<mapping-field-names-field,`_field_names`>>::
All fields in the document which contain non-null values.
Add a new `_ignored` meta field. (#29658) This adds a new `_ignored` meta field which indexes and stores fields that have been ignored at index time because of the `ignore_malformed` option. It makes malformed documents easier to identify by using `exists` or `term(s)` queries on the `_ignored` field. Closes #29494
2018-05-02 16:47:02 +08:00
<<mapping-ignored-field,`_ignored`>>::
All fields in the document that have been ignored at index time because of
<<ignore-malformed,`ignore_malformed`>>.
[DOCS] Swap `[float]` for `[discrete]` (#60124) Changes instances of `[float]` in our docs for `[discrete]`. Asciidoctor prefers the `[discrete]` tag for floating headings: https://asciidoctor.org/docs/asciidoc-asciidoctor-diffs/#blocks
2020-07-23 23:48:22 +08:00
[discrete]
[DOCS] Fix metadata field refs (#60764)
2020-08-06 01:21:00 +08:00
=== Routing metadata field
Docs: Refactored the mapping meta-fields docs
2015-07-20 07:24:29 +08:00
<<mapping-routing-field,`_routing`>>::
A custom routing value which routes a document to a particular shard.
[DOCS] Swap `[float]` for `[discrete]` (#60124) Changes instances of `[float]` in our docs for `[discrete]`. Asciidoctor prefers the `[discrete]` tag for floating headings: https://asciidoctor.org/docs/asciidoc-asciidoctor-diffs/#blocks
2020-07-23 23:48:22 +08:00
[discrete]
[DOCS] Fix metadata field refs (#60764)
2020-08-06 01:21:00 +08:00
=== Other metadata field
Docs: Refactored the mapping meta-fields docs
2015-07-20 07:24:29 +08:00
Docs: Mapping docs completely rewritten for 2.0
2015-08-06 23:24:29 +08:00
<<mapping-meta-field,`_meta`>>::
Docs: Refactored the mapping meta-fields docs
2015-07-20 07:24:29 +08:00
Docs: Mapping docs completely rewritten for 2.0
2015-08-06 23:24:29 +08:00
Application specific metadata.
Docs: Refactored the mapping meta-fields docs
2015-07-20 07:24:29 +08:00
Support fetching _tier field value (#71379) Now that the `fields` option allows fetching metadata fields, we can support loading the new `_tier` metadata field. Relates to #63569 and #68135.
2021-04-09 02:41:52 +08:00
<<mapping-tier-field,`_tier`>>::
The current data tier preference of the index to which the document belongs.
Add doc_count field mapper (#64503) Bucket aggregations compute bucket doc_count values by incrementing the doc_count by 1 for every document collected in the bucket. When using summary fields (such as aggregate_metric_double) one field may represent more than one document. To provide this functionality we have implemented a new field mapper (named doc_count field mapper). This field is a positive integer representing the number of documents aggregated in a single summary field. Bucket aggregations will check if a field of type doc_count exists in a document and will take this value into consideration when computing doc counts.
2020-11-03 23:47:17 +08:00
include::fields/doc-count-field.asciidoc[]
Docs: Refactored the mapping meta-fields docs
2015-07-20 07:24:29 +08:00
Docs: Mapping docs completely rewritten for 2.0
2015-08-06 23:24:29 +08:00
include::fields/field-names-field.asciidoc[]
Migrated documentation into the main repo
2013-08-29 07:24:34 +08:00
Add a new `_ignored` meta field. (#29658) This adds a new `_ignored` meta field which indexes and stores fields that have been ignored at index time because of the `ignore_malformed` option. It makes malformed documents easier to identify by using `exists` or `term(s)` queries on the `_ignored` field. Closes #29494
2018-05-02 16:47:02 +08:00
include::fields/ignored-field.asciidoc[]
Docs: Refactored the mapping meta-fields docs
2015-07-20 07:24:29 +08:00
include::fields/id-field.asciidoc[]
Docs: Mapping docs completely rewritten for 2.0
2015-08-06 23:24:29 +08:00
include::fields/index-field.asciidoc[]
Migrated documentation into the main repo
2013-08-29 07:24:34 +08:00
Docs: Mapping docs completely rewritten for 2.0
2015-08-06 23:24:29 +08:00
include::fields/meta-field.asciidoc[]
Index field names of documents. The `exists` and `missing` filters need to merge postings lists of all existing terms, which can be very costly, especially on high-cardinality fields. This commit indexes the field names of a document under `_field_names` and reuses it to speed up the `exists` and `missing` filters. This is only enabled for indices that are created on or after Elasticsearch 1.3.0. Close #5659
2014-05-20 23:34:00 +08:00
Docs: Refactored the mapping meta-fields docs
2015-07-20 07:24:29 +08:00
include::fields/routing-field.asciidoc[]
Migrated documentation into the main repo
2013-08-29 07:24:34 +08:00
Docs: Mapping docs completely rewritten for 2.0
2015-08-06 23:24:29 +08:00
include::fields/source-field.asciidoc[]
Support fetching _tier field value (#71379) Now that the `fields` option allows fetching metadata fields, we can support loading the new `_tier` metadata field. Relates to #63569 and #68135.
2021-04-09 02:41:52 +08:00
include::fields/tier-field.asciidoc[]