IMPORTANT: No additional bug fixes or documentation updates
will be released for this version. For the latest information, see the
current release documentation.
_uid field
edit_uid
field
editDeprecated in 6.0.0.
Now that types have been removed, documents are uniquely identified by their _id
and the _uid
field has only been kept as a view over the _id
field for backward compatibility.
Each document indexed is associated with a _type
(see
Mapping Type) and an _id
. These values are
combined as {type}#{id}
and indexed as the _uid
field.
The value of the _uid
field is accessible in queries, aggregations, scripts,
and when sorting:
# Example documents PUT my_index/_doc/1 { "text": "Document with ID 1" } PUT my_index/_doc/2?refresh=true { "text": "Document with ID 2" }
GET my_index/_search { "query": { "terms": { "_uid": [ "_doc#1", "_doc#2" ] } }, "aggs": { "UIDs": { "terms": { "field": "_uid", "size": 10 } } }, "sort": [ { "_uid": { "order": "desc" } } ], "script_fields": { "UID": { "script": { "lang": "painless", "source": "doc['_uid']" } } } }
Querying on the |
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Aggregating on the |
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Sorting on the |
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Accessing the |