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for topic title and description of API function 

Signed-off-by: alicejw <alicejw@amazon.com>
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alicejw 2022-04-13 09:44:58 -07:00
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8
_opensearch/rest-api/index-apis/update-mapping.md
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@ -6,11 +6,11 @@ grand_parent: REST API reference
nav_order: 220
---
# Update mapping
# Create or update mappings
Introduced 1.0
{: .label .label-purple }
If you want to add or update field types to an existing index, you can use the update mapping API operation.
If you want to create or add mappings and fields to an index, you can use the put mapping API operation.
You can't use this operation to update mappings that already map to existing data in the index. You must first create a new index with your desired mappings, and then use the [reindex API operation]({{site.url}}{{site.baseurl}}/opensearch/reindex-data) to map all the documents from your old index to the new index. If you don't want any downtime while you re-index your indexes, you can use [aliases]({{site.url}}{{site.baseurl}}/opensearch/index-alias).
@ -39,7 +39,7 @@ PUT /<target-index>/_mapping
PUT /_mapping
```
You can also use the update mapping operation to update multiple indices with one request.
You can also use the put mapping operation to update multiple indexes with one request.
```
PUT /<target-index1>,<target-index2>/_mapping
@ -51,7 +51,7 @@ All update mapping parameters are optional.
Parameter | Data Type | Description
:--- | :--- | :---
&lt;target-index&gt; | N/A | The index to add the mapping to. If you do not specify this parameter, OpenSearch adds the mapping to all indexes within the cluster.
&lt;target-index&gt; | N/A | Specifies an index to associate the mapping. If you do not specify this parameter, OpenSearch adds the mapping to all indexes within the cluster.
allow_no_indices | Boolean | Whether to ignore wildcards that don’t match any indexes. Default is `true`.
expand_wildcards | String | Expands wildcard expressions to different indexes. Combine multiple values with commas. Available values are `all` (match all indexes), `open` (match open indexes), `closed` (match closed indexes), `hidden` (match hidden indexes), and `none` (do not accept wildcard expressions), which must be used with `open`, `closed`, or both. Default is `open`.
ignore_unavailable | Boolean | If true, OpenSearch does not include missing or closed indexes in the response.