es版本6.8.4
解决方式：对字段索引两次，一次索引分词（用于搜索）一次索引不分词（用于排序）
- 字符串类型排序报错演示：
##mapping创建
PUT test_text_sort
{
"mappings": {
"doc": {
"properties": {
"name": {
"type": "text"
}
}
}
},
"settings": {
"number_of_replicas": 0,
"number_of_shards": 1
}
}
##插入数据
PUT test_text_sort/doc/1
{
"name":"aaaaa 1"
}
PUT test_text_sort/doc/2
{
"name":"aaaaa 2"
}
PUT test_text_sort/doc/3
{
"name":"aaaaa 3"
}
##查询并排序
GET test_text_sort/doc/_search
{
"query": {
"match_all": {}
},
"sort": [
{
"name": {
"order": "desc"
}
}
]
}
>>>结果报错
{
"error": {
"root_cause": [
{
"type": "illegal_argument_exception",
"reason": "Fielddata is disabled on text fields by default. Set fielddata=true on [name] in order to load fielddata in memory by uninverting the inverted index. Note that this can however use significant memory. Alternatively use a keyword field instead."
}
],
"type": "search_phase_execution_exception",
"reason": "all shards failed",
"phase": "query",
"grouped": true,
"failed_shards": [
{
"shard": 0,
"index": "test_text_sort",
"node": "0MqXXcTVQKySTK81OiGp_Q",
"reason": {
"type": "illegal_argument_exception",
"reason": "Fielddata is disabled on text fields by default. Set fielddata=true on [name] in order to load fielddata in memory by uninverting the inverted index. Note that this can however use significant memory. Alternatively use a keyword field instead."
}
}
],
"caused_by": {
"type": "illegal_argument_exception",
"reason": "Fielddata is disabled on text fields by default. Set fielddata=true on [name] in order to load fielddata in memory by uninverting the inverted index. Note that this can however use significant memory. Alternatively use a keyword field instead.",
"caused_by": {
"type": "illegal_argument_exception",
"reason": "Fielddata is disabled on text fields by default. Set fielddata=true on [name] in order to load fielddata in memory by uninverting the inverted index. Note that this can however use significant memory. Alternatively use a keyword field instead."
}
}
},
"status": 400
}
- 字符串类型排序实现演示
##删除索引
DELETE test_text_sort
## mapping创建
PUT test_text_sort
{
"mappings": {
"doc": {
"properties": {
"name": {
"type": "text",
"fields":{
"row":{
"type":"keyword"
}
},
"fielddata":true
}
}
}
},
"settings": {
"number_of_replicas": 0,
"number_of_shards": 1
}
}
##准备数据
PUT test_text_sort/doc/1
{
"name":"aaaaa 1"
}
PUT test_text_sort/doc/2
{
"name":"aaaaa 2"
}
PUT test_text_sort/doc/3
{
"name":"aaaaa 3"
}
## 查询方式一（错误）
GET test_text_sort/doc/_search
{
"query": {
"match_all": {}
},
"sort": [
{
"name": {
"order": "desc"
}
}
]
}
>>>查询结果
{
"took" : 1,
"timed_out" : false,
"_shards" : {
"total" : 3,
"successful" : 3,
"skipped" : 0,
"failed" : 0
},
"hits" : {
"total" : 3,
"max_score" : null,
"hits" : [
{
"_index" : "test_text_sort",
"_type" : "doc",
"_id" : "2",
"_score" : null,
"_source" : {
"name" : "aaaaa 2"
},
"sort" : [
"aaaaa"
]
},
{
"_index" : "test_text_sort",
"_type" : "doc",
"_id" : "1",
"_score" : null,
"_source" : {
"name" : "aaaaa 1"
},
"sort" : [
"aaaaa"
]
},
{
"_index" : "test_text_sort",
"_type" : "doc",
"_id" : "3",
"_score" : null,
"_source" : {
"name" : "aaaaa 3"
},
"sort" : [
"aaaaa"
]
}
]
}
}
##查询方式二 （正确）
GET test_text_sort/doc/_search
{
"query": {
"match_all": {}
},
"sort": [
{
"name.row": {
"order": "desc"
}
}
]
}
>>>查询结果
{
"took" : 2,
"timed_out" : false,
"_shards" : {
"total" : 3,
"successful" : 3,
"skipped" : 0,
"failed" : 0
},
"hits" : {
"total" : 3,
"max_score" : null,
"hits" : [
{
"_index" : "test_text_sort",
"_type" : "doc",
"_id" : "3",
"_score" : null,
"_source" : {
"name" : "aaaaa 3"
},
"sort" : [
"aaaaa 3"
]
},
{
"_index" : "test_text_sort",
"_type" : "doc",
"_id" : "2",
"_score" : null,
"_source" : {
"name" : "aaaaa 2"
},
"sort" : [
"aaaaa 2"
]
},
{
"_index" : "test_text_sort",
"_type" : "doc",
"_id" : "1",
"_score" : null,
"_source" : {
"name" : "aaaaa 1"
},
"sort" : [
"aaaaa 1"
]
}
]
}
}
另外：通过es默认创建text字段时的结构可以看出，默认创建的额text字段也是通过这种方式来实现text类型的排序的
##直接让es默认创建index并实现默认的mapping
PUT defult_text/doc/1
{
"name":"wangfei"
}
##查看mapping
GET defult_text/_mapping
>>>查看结果
{
"defult_text" : {
"mappings" : {
"doc" : {
"properties" : {
"name" : {
"type" : "text",
"fields" : {
"keyword" : {
"type" : "keyword",
"ignore_above" : 256
}
}
}
}
}
}
}
}
##添加两条数据
PUT defult_text/doc/1
{
"name":"wangjifei"
}
PUT defult_text/doc/2
{
"name":"angjifei"
}
## 排序查询，可以实现对text类型字段的排序
GET defult_text/doc/_search
{
"query": {
"match_all": {}
},
"sort": [
{
"name.keyword": {
"order": "asc"
}
}
]
}
>>>查看结果
{
"took" : 0,
"timed_out" : false,
"_shards" : {
"total" : 5,
"successful" : 5,
"skipped" : 0,
"failed" : 0
},
"hits" : {
"total" : 2,
"max_score" : null,
"hits" : [
{
"_index" : "defult_text",
"_type" : "doc",
"_id" : "1",
"_score" : null,
"_source" : {
"name" : "wangjifei"
},
"sort" : [
"wangjifei"
]
},
{
"_index" : "defult_text",
"_type" : "doc",
"_id" : "2",
"_score" : null,
"_source" : {
"name" : "angjifei"
},
"sort" : [
"angjifei"
]
}
]
}
}