Set Processor | ElasticSearch 7.7 权威指南中文版

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本地英文版地址: ../en/set-processor.html

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Set Processoredit

Sets one field and associates it with the specified value. If the field already exists, its value will be replaced with the provided one.

Table 61. Set Options

Name	Required	Default	Description
`field`	yes	-	The field to insert, upsert, or update. Supports template snippets.
`value`	yes	-	The value to be set for the field. Supports template snippets.
`override`	no	true	If processor will update fields with pre-existing non-null-valued field. When set to `false`, such fields will not be touched.
`if`	no	-	Conditionally execute this processor.
`on_failure`	no	-	Handle failures for this processor. See Handling Failures in Pipelines.
`ignore_failure`	no	`false`	Ignore failures for this processor. See Handling Failures in Pipelines.
`tag`	no	-	An identifier for this processor. Useful for debugging and metrics.

{
  "description" : "sets the value of count to 1"
  "set": {
    "field": "count",
    "value": 1
  }
}

This processor can also be used to copy data from one field to another. For example:

PUT _ingest/pipeline/set_os
{
  "description": "sets the value of host.os.name from the field os",
  "processors": [
    {
      "set": {
        "field": "host.os.name",
        "value": "{{os}}"
      }
    }
  ]
}

POST _ingest/pipeline/set_os/_simulate
{
  "docs": [
    {
      "_source": {
        "os": "Ubuntu"
      }
    }
  ]
}

Result:

{
  "docs" : [
    {
      "doc" : {
        "_index" : "_index",
        "_type" : "_doc",
        "_id" : "_id",
        "_source" : {
          "host" : {
            "os" : {
              "name" : "Ubuntu"
            }
          },
          "os" : "Ubuntu"
        },
        "_ingest" : {
          "timestamp" : "2019-03-11T21:54:37.909224Z"
        }
      }
    }
  ]
}

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