原文地址: https://www.elastic.co/guide/en/elasticsearch/reference/7.7/mapping-type-field.html, 原文档版权归 www.elastic.co 所有
IMPORTANT: No additional bug fixes or documentation updates
will be released for this version. For the latest information, see the
current release documentation.
_type fieldedit
Deprecated in 6.0.0.
Each document indexed is associated with a _type and
an _id. The _type field is indexed in order to make
searching by type name fast.
The value of the _type field is accessible in queries, aggregations,
scripts, and when sorting:
# Example documents
PUT my_index/_doc/1?refresh=true
{
"text": "Document with type 'doc'"
}
GET my_index/_search
{
"query": {
"term": {
"_type": "_doc"
}
},
"aggs": {
"types": {
"terms": {
"field": "_type",
"size": 10
}
}
},
"sort": [
{
"_type": {
"order": "desc"
}
}
],
"script_fields": {
"type": {
"script": {
"lang": "painless",
"source": "doc['_type']"
}
}
}
}