每个文档都有一个 _id 唯一标识,这个id可以在创建文档的时候手动传入或者由es自己生成。
_id 字段在做聚合、排序、脚本时功能受限,如果说上述操作需要用到 _id 字段,需要把 _id 的值在 doc_values 里也保存一份
创建文档
# Example
PUT {my_index}/_doc/1
{
"text":"document with id 1"
}
PUT {my_index}/_doc
{
"text":"document with auto generate"
}
根据id查询文档
- 根据
get api查询 - 根据
ids query查询 - 根据
term,terms,match查询
get api 查询
GET {my_index}/_doc/{myid}
GET books_index/_doc/1
ids query 查询
# query docs with id in (1,2,3)
GET {my_index}/_search
{
"query":
{
"ids":
{
"values":[1,2,3]
}
}
}
term terms match 查询
# term
GET {my_index}/_search
{
"query": {
"term": {
"_id": {
"value": "1"
}
}
}
}
}
# terms
GET {my_index}/_search
{
"query": {
"terms": {
"_id": [
"1","2"
]
}
}
}
}
# match
GET {my_index}/_search
{
"query": {
"match": {
"_id": 1
}
}
}
}