How to filter multiple characters in Elasticsearch

Question

Is there a way how to filter multiple characters during analyzing in ElastisSearch? We would like to setup it so if user searches 'botled' then he get the documents that include 'bottled' or 'botttled', etc., i.e no matter double, tripple letters.

I have looking for solution in token filters https://www.elastic.co/guide/en/elasticsearch/reference/current/analysis-tokenfilters.html, but it seems that none of them matches our requirements.

Kaushik J · Accepted Answer · 2020-07-01 17:13:26Z

1

by default elasticsearch text field is tokenized based on whitespace, i.e. only words are indexed and are searchable.

would regex search work for you?

GET /_search
{
    "query": {
        "regexp": {
            "user": {
                "value": "b+o+t+t+l+e+d+"
            }
        }
    }
}

b+ --> one or more occurrence of b

answered Jul 1, 2020 at 17:13

Kaushik J

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1 Comment

Jiří Chmiel Over a year ago

Thank you. Your solution is also applicable. Although I originally thought that the repeating chars would be removed just during the analysis, but your solution is also helpful. By the way, I found out that we really needed something more like a "fuzzy search" rather than what I was asking for, but that's my stupidity. Thank you for your time.

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