elasticsearch does not return expected returns - elasticsearch

Question

I'm complete new on elasticsearch. I tried search API but it's not returning what I expected
What I did
POST /test/_doc/1
{
"name": "Hello World"
}
GET /test/_doc/1
Response:
{
"_index" : "test",
"_type" : "_doc",
"_id" : "1",
"_version" : 5,
"_seq_no" : 28,
"_primary_term" : 1,
"found" : true,
"_source" : {
"name" : "Hello World"
}
}
GET /test/_mapping
Response:
{
"test" : {
"mappings" : {
"properties" : {
"name" : {
"type" : "text",
"fields" : {
"keyword" : {
"type" : "keyword",
"ignore_above" : 256
}
}
},
"query" : {
"properties" : {
"term" : {
"properties" : {
"name" : {
"type" : "text",
"fields" : {
"keyword" : {
"type" : "keyword",
"ignore_above" : 256
}
}
}
}
}
}
}
}
}
}
}
GET /test/_search
{
"query": {
"term": {
"name": "Hello"
}
}
}:
{
"took" : 4,
"timed_out" : false,
"_shards" : {
"total" : 1,
"successful" : 1,
"skipped" : 0,
"failed" : 0
},
"hits" : {
"total" : {
"value" : 0,
"relation" : "eq"
},
"max_score" : null,
"hits" : [ ]
}
}
GET /test/_search
{
"query": {
"term": {
"name": "Hello World"
}
}
}
Response:
{
"took" : 1,
"timed_out" : false,
"_shards" : {
"total" : 1,
"successful" : 1,
"skipped" : 0,
"failed" : 0
},
"hits" : {
"total" : {
"value" : 0,
"relation" : "eq"
},
"max_score" : null,
"hits" : [ ]
}
}
My elasticsearch version is 7.3.2
The last two search should return me document 1, is that correct? Why does it hit nothing?

Answer 1

Problem is that you have term queries. Term queries are not analysed. Hence Hello didn't match the term hello in your index. Note the case difference.
Unlike full-text queries, term-level queries do not analyze search terms. Instead, term-level queries match the exact terms stored in a field.
Reference
Whereas match queries analyse the search term also.
{
"query": {
"match": {
"name": "Hello"
}
}
}
You can use _analyze to check how your terms are indexed.