我有一个大的ES索引,动态创建"关键字"领域。我需要对这些进行不区分大小写的搜索。我理解分析器不适用于关键字字段,并且将使用规范化器:https://www.elastic.co/guide/en/elasticsearch/reference/current/analysis-normalizers.html
有没有办法动态地为字段/映射添加规范化器?我可以通过关闭索引,添加分析器并重新打开索引,将分析器添加到现有文本字段。添加规范化器时,这似乎不适用于现有索引。除了创建另一个索引以重新索引所有数据之外,有没有办法做到这一点?
以下是我的步骤: 使用小写规范化器创建测试索引:
curl -XPUT localhost:9200/ganesh_index/ -d '
{
"settings": {
"analysis": {
"normalizer": {
"useLowercase": {
"type": "custom",
"filter": [ "lowercase" ]
}
}
}
},
"mappings":{
"ganesh_type":{
"properties":{
"title":{
"normalizer":"useLowercase",
"type":"keyword"
}
}
}
}
}'
现在,我可以根据需要插入和查询:
curl -X PUT localhost:9200/ganesh_index/ganesh_type/1 -d '{"title":"ThisFox.StatusCode1"}'
curl -X PUT localhost:9200/ganesh_index/ganesh_type/2 -d '{"title":"ThisFox.StatusCode2"}'
curl -X POST 'localhost:9200/ganesh_index/_search?pretty' -d '{"query": {"regexp":{"title": "this.*code1"}}}'
{
"took" : 24,
"timed_out" : false,
"_shards" : {
"total" : 5,
"successful" : 5,
"skipped" : 0,
"failed" : 0
},
"hits" : {
"total" : 1,
"max_score" : 1.0,
"hits" : [
{
"_index" : "ganesh_index",
"_type" : "ganesh_type",
"_id" : "1",
"_score" : 1.0,
"_source" : {
"title" : "ThisFox.StatusCode1"
}
}
]
}
}
但是,如果我的索引已经存在,那么:
curl -X PUT localhost:9200/ganesh_index -d '
{
"settings": {
"index": {
"number_of_shards": 2,
"number_of_replicas": 2
}
}
}'
我插入记录,我以后无法添加规范化器。
curl -XPUT localhost:9200/ganesh_index/?pretty -d '
> {
> "settings": {
> "analysis": {
> "normalizer": {
> "useLowercase": {
> "type": "custom",
> "filter": [ "lowercase" ]
> }
> }
> }
> },
> "mappings":{
> "ganesh_type":{
> "properties":{
> "title":{
> "normalizer":"useLowercase",
> "type":"keyword"
> }
> }
> }
> }
> }'
{
"error" : {
"root_cause" : [
{
"type" : "index_already_exists_exception",
"reason" : "index [ganesh_index/mg5TckzaR5KZDE-FphTeDg] already exists",
"index_uuid" : "mg5TckzaR5KZDE-FphTeDg",
"index" : "ganesh_index"
}
],
"type" : "index_already_exists_exception",
"reason" : "index [ganesh_index/mg5TckzaR5KZDE-FphTeDg] already exists",
"index_uuid" : "mg5TckzaR5KZDE-FphTeDg",
"index" : "ganesh_index"
},
"status" : 400
}
有没有办法为现有索引添加规范化器(在关键字字段上)?
答案 0 :(得分:0)
不,您必须重新编制索引或创建新映射。
答案 1 :(得分:0)
当前,Elasticsearch不支持此类活动。 即使您这样做了,也会给我们一个信息。
{
"error": {
"root_cause": [
{
"type": "resource_already_exists_exception",
"reason": "index [category_video_autocomplete_3/FkxOwP_RQMW_L077hYLPJg] already exists",
"index_uuid": "FkxOwP_RQMW_L077hYLPJg",
"index": "category_video_autocomplete_3"
}
],
"type": "resource_already_exists_exception",
"reason": "index [category_video_autocomplete_3/FkxOwP_RQMW_L077hYLPJg] already exists",
"index_uuid": "FkxOwP_RQMW_L077hYLPJg",
"index": "category_video_autocomplete_3"
},
"status": 400
}
该消息看起来很复杂,但是仔细观察可以发现
resource_already_exists_exception
意味着您要创建的资源已经存在,因此我们无法创建相同的资源,这里的资源表示索引名为category_video_autocomplete_3。