Elasticsearch 7 : 数组、date
在ES中,没有专用的数组类型,任何字段类型都可以变成数组。
示例:
DELETE arr
PUT arr
PUT /arr/_mapping
{
"properties": {
"tags": {
"type": "keyword"
}
}
}
# 添加三条记录
POST /arr/_doc
{
"tags":[]
}
POST /arr/_doc
{
"tags": ["学校", "政府"]
}
POST /arr/_doc
{
"tags": ["学校"]
}
搜索:
# 搜索
GET /arr/_search
{
"query": {
"match": {
"tags": "学校"
}
}
}
# 结果为:
{
"took" : 0,
"timed_out" : false,
"_shards" : {
"total" : 1,
"successful" : 1,
"skipped" : 0,
"failed" : 0
},
"hits" : {
"total" : {
"value" : 2,
"relation" : "eq"
},
"max_score" : 0.21110919,
"hits" : [
{
"_index" : "arr",
"_type" : "_doc",
"_id" : "bJbZtXIBB9Te9HiR87Zy",
"_score" : 0.21110919,
"_source" : {
"tags" : [
"学校",
"政府"
]
}
},
{
"_index" : "arr",
"_type" : "_doc",
"_id" : "bZbZtXIBB9Te9HiR9rau",
"_score" : 0.21110919,
"_source" : {
"tags" : [
"学校"
]
}
}
]
}
}
在ES中,date类型不可为NULL值,因此不允许有这样的设置:"null_value": "NULL"