Search Query about phone number in Elasticsearch - elasticsearch

Question

I have a question about Elasticsearch
I made a search query about the phone number. My plan is that even I don't put the hyphen or bracket, result would show the phone number.
For example,
phone number is [phone]
and
search query is
GET _msearch
{ "query": {"fuzzy": { "tel": {"value": "2132341111", "max_expansions" : 100}}}}
the result is
{
"took" : 0,
"responses" : [
{
"took" : 0,
"timed_out" : false,
"_shards" : {
"total" : 1,
"successful" : 1,
"skipped" : 0,
"failed" : 0
},
"hits" : {
"total" : {
"value" : 0,
"relation" : "eq"
},
"max_score" : null,
"hits" : [ ]
},
"status" : 200
}
]
}
I need a help that even I put the number without bracket and hyphen, the result show the real phone number with information.

Answer 1

To allow efficient querying, make sure to index the documents accordingly.
In this example that I just made, I am making sure that phone-numbers are indexed without the hyphens and parenthesis. This allows me to query without using those characters as well.
Example:
(1) Create the index:
PUT my_index
{
"settings": {
"analysis": {
"analyzer": {
"default": {
"tokenizer": "standard",
"char_filter": [
"my_char_filter"
]
}
},
"char_filter": {
"my_char_filter": {
"type": "pattern_replace",
"pattern": "\\((\\d+)\\)(\\d+)-(\\d+)",
"replacement": "$1$2$3"
}
}
}
}
}
(2) Add a document to the index:
POST my_index/doc
{
"Description": "My phone number is [phone]"
}
(3) Query with the original phone number:
GET my_index/_search
{
"query": {
"match": {
"Description": "[phone]"
}
}
}
(1 result)
(4) Query without special characters:
GET my_index/_search
{
"query": {
"match": {
"Description": "2132341111"
}
}
}
(1 result)
So how did that work?
By using the pattern_replace char filter, we're stripping away everything but the raw numbers, meaning that "[phone]" is actually stored as "2132341111" whenever we match a phone numbes. Since this pattern_replace is also applied at query time, we can now search both with and without the special characters in the phone number and get a match.