# Keyword Insensitive Match

**URL:** <https://discuss.elastic.co/t/keyword-insensitive-match/226549>\
**Category:** Elasticsearch\
**Created:** [April 5, 2020, 5:10am UTC](https://discuss.elastic.co/t/keyword-insensitive-match/226549 "2020-04-05T05:10:15Z")\
**Posts on this page:** 7\
**Page:** 1

<div class="post-metadata">

**Author:** ![Jose\_Salgodo](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/jose_salgodo/32/65571_2.png) [@Jose\_Salgodo](https://discuss.elastic.co/u/Jose_Salgodo)\
**Post date:** [April 5, 2020, 5:10am UTC](https://discuss.elastic.co/t/keyword-insensitive-match/226549/1 "2020-04-05T05:10:15Z")

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any way to make a keyword type case insensitive ? an example would be me using match query and the input would be "input" and the output "InPuT"

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<div class="post-metadata">

**Author:** ![dadoonet](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dadoonet/32/137187_2.png) [@dadoonet](https://discuss.elastic.co/u/dadoonet)\
**Post date:** [April 5, 2020, 6:26am UTC](https://discuss.elastic.co/t/keyword-insensitive-match/226549/2 "2020-04-05T06:26:53Z")

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You can use a `lowercase` normalizer.

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<div class="post-metadata">

**Author:** ![Jose\_Salgodo](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/jose_salgodo/32/65571_2.png) [@Jose\_Salgodo](https://discuss.elastic.co/u/Jose_Salgodo)\
**Post date:** [April 5, 2020, 10:26pm UTC](https://discuss.elastic.co/t/keyword-insensitive-match/226549/3 "2020-04-05T22:26:16Z")

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the problem i have now is that the normalizer applys for all my fields? i want my username field to be case insensitive but my email field to not have anything

EDIT

this method seems to work but im not sure its the right way

```auto
"settings": {
    "analysis": {
        "normalizer": {
            "lowercase": {
                "type": "custom",
                "filter": "lowercase"
            }
        }
    },
    "number_of_replicas": 0,
    "auto_expand_replicas": false
},
"mappings": {
    "properties": {
        "username": {
            "type": "keyword",
            "normalizer": "lowercase"
        },
        "email": {
            "type": "keyword"
        }
    }
}

```

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<div class="post-metadata">

**Author:** ![dadoonet](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dadoonet/32/137187_2.png) [@dadoonet](https://discuss.elastic.co/u/dadoonet)\
**Post date:** [April 6, 2020, 1:26am UTC](https://discuss.elastic.co/t/keyword-insensitive-match/226549/4 "2020-04-06T01:26:02Z")

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It is.

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<div class="post-metadata">

**Author:** ![Jose\_Salgodo](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/jose_salgodo/32/65571_2.png) [@Jose\_Salgodo](https://discuss.elastic.co/u/Jose_Salgodo)\
**Post date:** [April 6, 2020, 1:40am UTC](https://discuss.elastic.co/t/keyword-insensitive-match/226549/5 "2020-04-06T01:40:34Z")

</div>

does this normalizer have any limitations ? like certain characters that arent allowed?

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<div class="post-metadata">

**Author:** ![dadoonet](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dadoonet/32/137187_2.png) [@dadoonet](https://discuss.elastic.co/u/dadoonet)\
**Post date:** [April 6, 2020, 1:57am UTC](https://discuss.elastic.co/t/keyword-insensitive-match/226549/6 "2020-04-06T01:57:12Z")

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I don't think so.

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<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [May 4, 2020, 1:57am UTC](https://discuss.elastic.co/t/keyword-insensitive-match/226549/7 "2020-05-04T01:57:16Z")

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