94 lines
1.8 KiB
Plaintext
94 lines
1.8 KiB
Plaintext
[[mapper-size]]
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=== Mapper Size Plugin
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The mapper-size plugin provides the `_size` meta field which, when enabled,
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indexes the size in bytes of the original
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{ref}/mapping-source-field.html[`_source`] field.
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:plugin_name: mapper-size
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include::install_remove.asciidoc[]
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[[mapper-size-usage]]
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==== Using the `_size` field
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In order to enable the `_size` field, set the mapping as follows:
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[source,console]
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--------------------------
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PUT my_index
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{
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"mappings": {
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"_size": {
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"enabled": true
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}
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}
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}
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--------------------------
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The value of the `_size` field is accessible in queries, aggregations, scripts,
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and when sorting:
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[source,console]
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--------------------------
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# Example documents
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PUT my_index/_doc/1
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{
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"text": "This is a document"
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}
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PUT my_index/_doc/2
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{
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"text": "This is another document"
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}
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GET my_index/_search
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{
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"query": {
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"range": {
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"_size": { <1>
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"gt": 10
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}
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}
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},
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"aggs": {
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"sizes": {
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"terms": {
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"field": "_size", <2>
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"size": 10
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}
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}
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},
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"sort": [
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{
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"_size": { <3>
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"order": "desc"
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}
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}
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],
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"script_fields": {
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"size": {
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"script": "doc['_size']" <4>
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}
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},
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"docvalue_fields": [
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{
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"field": "_size" <5>
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}
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]
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}
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--------------------------
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// TEST[continued]
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<1> Querying on the `_size` field
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<2> Aggregating on the `_size` field
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<3> Sorting on the `_size` field
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<4> Uses a
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{ref}/search-request-body.html#request-body-search-script-fields[script field]
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to return the `_size` field in the search response.
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<5> Uses a
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{ref}/run-a-search.html#docvalue-fields[doc value
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field] to return the `_size` field in the search response. Doc value fields are
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useful if
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{ref}/modules-scripting-security.html#allowed-script-types-setting[inline
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scripts are disabled].
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