Boosting is the process by which you can modify the relevance of a document. You can boost a document while you are indexing it or when you query for the document.we definitely recommend you use the query-time boosting because it’s the most flexible and allows you to change your mind about what fields or terms are important.
Create Elasticsearch Index
PUT product-index
{
"settings": {
"analysis": {
"normalizer": {
"lowercaseNormalizer": {
"type": "custom",
"filter": ["lowercase", "asciifolding"]
}
}
}
},
"mappings": {
"properties": {
"ProductName": {
"type": "keyword",
"normalizer": "lowercaseNormalizer"
},
"ProductCode": {
"type": "keyword",
"normalizer": "lowercaseNormalizer"
},
"ProductDescription": {
"type": "text"
},
"ProductFamily": {
"type": "keyword",
"normalizer": "lowercaseNormalizer"
},
"Color": {
"type": "keyword"
}
}
}
}
Adding sample data/records
#Add first Document in elasticsearch
PUT /product-index/_doc/1
{
"ProductName": "CBC Anti Virus",
"ProductCode": "Network",
"ProductDescription": "APAC",
"ProductFamily": "Sales Cloud",
"Color": "Silver"
}
PUT /product-index/_doc/2
{
"ProductName": "CBC Esoteric",
"ProductDescription": "CBC Panel - 1",
"ProductFamily": "Hardware",
"Color": "BLUE"
}
PUT /product-index/_doc/3
{
"ProductName": "CBC Oncology",
"ProductCode": "CBC Health",
"ProductFamily": "Software"
}
PUT /product-index/_doc/4
{
"ProductName": "CBC Panel",
"ProductCode": "Secure Wifi",
"ProductDescription": "Only One Charge Type"
}
PUT /product-index/_doc/5
{
"ProductName": "CBC Panel (Invitro)",
"ProductCode": "Secure Wifi",
"ProductDescription": "CBC Panel",
"ProductFamily": "Hardware",
"Color": "GREEN"
}
PUT /product-index/_doc/6
{
"ProductName": "CBC Panel - Beijing",
"ProductCode": "CBC Panel",
"ProductDescription": "Only One Charge Type",
"ProductFamily": "Software",
"Color": "BLUE"
}
PUT /product-index/_doc/7
{
"ProductName": "Esoteric",
"ProductCode": "CBC",
"ProductFamily": "Marketing Cloud",
"Color": "WHITE"
}
PUT /product-index/_doc/8
{
"ProductName": "Oncology",
"ProductCode": "Network",
"ProductDescription": "CBC",
"ProductFamily": "Sales Cloud",
"Color": "WHITE"
}
View data/regcords
GET /product-index/_search
Searching with relevancy
Boosting the score of a particular query or field as belows
#Try 1
POST /product-index/_search
{
"query": {
"match": {
"ProductFamily": {
"query": "hArdware",
"boost": 2
}
}
}
}
#Try 2
POST /product-index/_search
{
"query": {
"bool": {
"should": [
{
"query_string": {
"query": "*Wifi*",
"default_field": "ProductCode",
"boost": 3
}
},
{
"match": {
"ProductFamily": {
"query": "hArdware",
"boost": 4
}
}
}
]
}
}
}
#Try 3
GET /product-index/_search
{
"query": {
"query_string": {
"query": "*Secure* OR *panel*",
"default_field": "ProductCode",
"boost": 1
}
}
}
#Try 4
POST /product-index/_search
{
"query": {
"bool": {
"should": [
{
"query_string": {
"query": "*CBC*",
"default_field": "ProductName",
"boost": 100
}
},
{
"query_string": {
"query": "*hard*",
"default_field": "ProductFamily",
"boost": 91
}
},
{
"query_string": {
"query": "*one*",
"default_field": "ProductDescription",
"boost": 92
}
},
{
"query_string": {
"query": "*Blue*",
"default_field": "Color",
"boost": 90
}
},
{
"query_string": {
"query": "*Health*",
"default_field": "ProductCode",
"boost": 93
}
}
]
}
}
}
#Try 5
POST /product-index/_search
{
"query": {
"bool": {
"should": [
{
"query_string": {
"query": "*cbc*",
"default_field": "ProductName",
"boost": 49
}
},
{
"query_string": {
"query": "*cbc*",
"default_field": "ProductCode",
"boost": 7
}
},
{
"query_string": {
"query": "*cbc*",
"fields": [ "ProductDescription", "ProductFamily"]
}
}
]
}
}
}
#Try 6
GET /product-index/_search
{
"query" : {
"query_string" : {
"query" : "*cbc*",
"fields" : ["*"]
}
}
}
#Try 7
POST /product-index/_search
{
"query": {
"bool": {
"should": [
{
"query_string": {
"query": "*cbc*",
"default_field": "ProductName",
"boost": 49
}
},
{
"query_string": {
"query": "*cbc*",
"default_field": "ProductCode",
"boost": 7
}
},
{
"query_string": {
"query": "*cbc*",
"fields": [ "*"]
}
}
]
}
}
}
#Try Demonstration for aggregation
GET /product-index/_search
{
"query": {
"bool": {
"filter": [
{
"match": { "ProductFamily" : "hArdware"}
}
]
}
},
"aggs": {
"Family": {
"terms": {
"field": "ProductFamily"
}
}
}
}
#Try Another example of aggregation
GET /product-index/_search
{
"query": {
"bool": {
"filter": [
{
"match": {
"ProductFamily": "hArdware"
}
},
{
"bool": {
"should": [
{
"query_string": {
"query": "*cbc* OR *network*",
"fields": [
"ProductName",
"ProductCode",
"ProductDescription",
"ProductFamily",
"Color"
]
}
}
]
}
}
]
}
},
"aggs": {
"Family": {
"terms": {
"field": "ProductFamily"
}
},
"Color": {
"terms": {
"field": "Color"
}
}
},
"_source": [
"ProductName",
"ProductCode",
"ProductDescription",
"ProductFamily",
"Color"
]
}
Reference
- Documentation: Elasticsearch Boost elasticsearch-in-action
