Elastic Search Wildcard query with space failing 7.11 - elasticsearch

Question

I am having my data indexed in elastic search in version 7.11. This is my mapping i got when i directly added documents to my index.
{"properties":{"name":{"type":"text","fields":{"keyword":{"type":"keyword","ignore_above":256}}}
I havent added the keyword part but no idea where it came from.
I am running a wild card query on the same. But unable to get data for keywords with spaces.
{
"query": {
"bool":{
"should":[
{"wildcard": {"name":"*hello world*"}}
]
}
}
}
Have seen many answers related to not_analyzed . And i have tried updating {"index":"true"} in mapping but with no help. How to make the wild card search work in this version of elastic search
Tried adding the wildcard field
PUT http://localhost:9001/indexname/_mapping
{
"properties": {
"name": {
"type" :"wildcard"
}
}
}
And got following response
{
"error": {
"root_cause": [
{
"type": "illegal_argument_exception",
"reason": "mapper [name] cannot be changed from type [text] to [wildcard]"
}
],
"type": "illegal_argument_exception",
"reason": "mapper [name] cannot be changed from type [text] to [wildcard]"
},
"status": 400
}
Adding a sample document to match
{
"_index": "accelerators",
"_type": "_doc",
"_id": "602ec047a70f7f30bcf75dec",
"_score": 1.0,
"_source": {
"acc_id": "602ec047a70f7f30bcf75dec",
"name": "hello world example",
"type": "Accelerator",
"description": "khdkhfk ldsjl klsdkl",
"teamMembers": [
{
"userId": "karthik.r#gmail.com",
"name": "Karthik Ganesh R",
"shortName": "KR",
"isOwner": true
},
{
"userId": "anand.sajan#gmail.com",
"name": "Anand Sajan",
"shortName": "AS",
"isOwner": false
}
],
"sectorObj": [
{
"item_id": 14,
"item_text": "Cross-sector"
}
],
"geographyObj": [
{
"item_id": 4,
"item_text": "Global"
}
],
"technologyObj": [
{
"item_id": 1,
"item_text": "Artificial Intelligence"
}
],
"themeColor": 1,
"mainImage": "assets/images/Graphics/Asset 35.svg",
"features": [
{
"name": "Ideation",
"icon": "Asset 1007.svg"
},
{
"name": "Innovation",
"icon": "Asset 1044.svg"
},
{
"name": "Strategy",
"icon": "Asset 1129.svg"
},
{
"name": "Intuitive",
"icon": "Asset 964.svg"
},
],
"logo": {
"actualFileName": "",
"fileExtension": "",
"fileName": "",
"fileSize": 0,
"fileUrl": ""
},
"customLogo": {
"logoColor": "#B9241C",
"logoText": "EC",
"logoTextColor": "#F6F6FA"
},
"collaborators": [
{
"userId": "muhammed.arif#gmail.com",
"name": "muhammed Arif P T",
"shortName": "MA"
},
{
"userId": "anand.sajan#gmail.com",
"name": "Anand Sajan",
"shortName": "AS"
}
],
"created_date": "2021-02-18T19:30:15.238000Z",
"modified_date": "2021-03-11T11:45:49.583000Z"
}
}

Answer 1

You cannot modify a field mapping once created. However, you can create another sub-field of type wildcard, like this:
PUT http://localhost:9001/indexname/_mapping
{
"properties": {
"name": {
"type": "text",
"fields": {
"wildcard": {
"type" :"wildcard"
},
"keyword": {
"type" :"keyword",
"ignore_above":256
}
}
}
}
}
When the mapping is updated, you need to reindex your data so that the new field gets indexed, like this:
POST http://localhost:9001/indexname/_update_by_query
And then when this finishes, you'll be able to query on this new field like this:
{
"query": {
"bool": {
"should": [
{
"wildcard": {
"name.wildcard": "*hello world*"
}
}
]
}
}
}