34 lines
1.5 KiB
Markdown
34 lines
1.5 KiB
Markdown
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---
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navigation_title: "Join"
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mapped_pages:
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- https://www.elastic.co/guide/en/elasticsearch/reference/current/join-processor.html
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---
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# Join processor [join-processor]
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Joins each element of an array into a single string using a separator character between each element. Throws an error when the field is not an array.
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$$$join-options$$$
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| Name | Required | Default | Description |
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| --- | --- | --- | --- |
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| `field` | yes | - | Field containing array values to join |
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| `separator` | yes | - | The separator character |
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| `target_field` | no | `field` | The field to assign the joined value to, by default `field` is updated in-place |
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| `description` | no | - | Description of the processor. Useful for describing the purpose of the processor or its configuration. |
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| `if` | no | - | Conditionally execute the processor. See [Conditionally run a processor](docs-content://manage-data/ingest/transform-enrich/ingest-pipelines.md#conditionally-run-processor). |
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| `ignore_failure` | no | `false` | Ignore failures for the processor. See [Handling pipeline failures](docs-content://manage-data/ingest/transform-enrich/ingest-pipelines.md#handling-pipeline-failures). |
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| `on_failure` | no | - | Handle failures for the processor. See [Handling pipeline failures](docs-content://manage-data/ingest/transform-enrich/ingest-pipelines.md#handling-pipeline-failures). |
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| `tag` | no | - | Identifier for the processor. Useful for debugging and metrics. |
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```js
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{
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"join": {
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"field": "joined_array_field",
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"separator": "-"
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}
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}
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```
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