Elasticsearch case-insensitive partial match over multiple fields - elasticsearch

Question

I'm implementing a search box in Elasticsearch and I have an Elasticsearch index with the following mappings:
{
"mappings": {
"properties": {
"name": {
"type": "text"
},
"brand": {
"type": "text"
}
}
}
}
And I'd like, quite simply, to do a query such as (in SQL):
SELECT * FROM <table> WHERE brand ILIKE '%test%' OR name ILIKE '%test%';
I've tried a query such as:
{
"query": {
"query_string": {
"query": "*test*",
"fields": ["brand", "name"]
}
}
}
and that gives me my desired result, however, I've noticed that the docs recommend not using query_string for a search box as it can lead to performance issues.
I then tried a multi_match query:
{
"query": {
"multi_match" : {
"query": "test"
}
}
}
But that yielded no results. Further, when I used an ngram tokenizer, it returned all documents all the time.
I've consulted countless resources on this and even on StackOverflow there are countless unanswered questions regarding this topic. Could somebody explain how this is achieved in the Elasticsearch world, or am I simply using the wrong tool for the job? Thanks.

Answer 1

Since you have not provided the sample documents, I have created complete example, what you are trying to do is very much possible in Elasticsearch, with simple boolean should wildcard queries as shown below
{
"query": {
"bool": {
"should": [
{
"wildcard": {
"name.keyword": {
"value": "*test*"
}
}
},
{
"wildcard": {
"brand.keyword": {
"value": "*test*"
}
}
}
],
"minimum_should_match": 1,
"boost": 1.0
}
}
}
You can test above query on below sample documents
{
"brand" : "test",
"name" : "name foo according to use"
}
{
"brand" : "barand name is foo",
"name" : "name foo according to use"
}
{
"brand" : "barand name is test",
"name" : "name tested according to use"
}
{
"brand" : "barand name is testing",
"name" : "test the name"
}
on above 4 sample documents, query returns below documents
"hits": [
{
"_index": "73885469",
"_id": "1",
"_score": 2.0,
"_source": {
"brand": "barand name is testing",
"name": "test the name"
}
},
{
"_index": "73885469",
"_id": "2",
"_score": 2.0,
"_source": {
"brand": "barand name is test",
"name": "name tested according to use"
}
},
{
"_index": "73885469",
"_id": "4",
"_score": 1.0,
"_source": {
"brand": "test",
"name": "name foo according to use"
}
}
]
Which is i believe your expected documents