# Query\_string in 5.1 is case sensitive **URL:** \ **Category:** Elasticsearch\ **Created:** [March 16, 2017, 3:07pm UTC](https://discuss.elastic.co/t/query-string-in-5-1-is-case-sensitive/78886 "2017-03-16T15:07:50Z")\ **Posts on this page:** 10\ **Page:** 1
**Author:** ![telebh](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/telebh/32/42272_2.png) [@telebh](https://discuss.elastic.co/u/telebh)\ **Post date:** [March 16, 2017, 3:07pm UTC](https://discuss.elastic.co/t/query-string-in-5-1-is-case-sensitive/78886/1 "2017-03-16T15:07:50Z")
Hi There, I am using AWS ElasticSearch Service. at first i had version "2.3". when using "query\_string to search for a field as follows. even authorlast name starts with uppercase "S" , but it is mapped to lowercase as per explanation result below, so i got the result. but after switch to ES "5.1" this no longer work. it does not map "S" to lowercase "s" so i did not get result. is any change in query\_string parsing in 2.3 than 5.1? ```auto { "query": { "bool": { "must": [{ "query_string": { "query": "S?ith", "fields": ["authlast"] } }] } } } ``` ```auto "explanations": [ { "index": "myindex", "valid": true, "explanation": "+authlast:S?ith" } ] ``` Thanks ---
**Author:** ![nik9000](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/nik9000/32/44947_2.png) [@nik9000](https://discuss.elastic.co/u/nik9000)\ **Post date:** [March 16, 2017, 7:25pm UTC](https://discuss.elastic.co/t/query-string-in-5-1-is-case-sensitive/78886/2 "2017-03-16T19:25:20Z")
Have a look at [this](https://www.elastic.co/guide/en/elasticsearch/reference/current/query-dsl-query-string-query.html#_wildcards). It looks like it should work if the `analyzer` for the field lowercases it. ---
**Author:** ![telebh](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/telebh/32/42272_2.png) [@telebh](https://discuss.elastic.co/u/telebh)\ **Post date:** [March 16, 2017, 7:30pm UTC](https://discuss.elastic.co/t/query-string-in-5-1-is-case-sensitive/78886/3 "2017-03-16T19:30:39Z")
Yes, i have a custom analyzer that looks as follows "field\_analyzer": { "type": "custom", "char\_filter": "html\_strip", "tokenizer": "whitespace", "filter": ["lowercase", "asciifolding", "trim"] } field: "authfirst": { "type": "string", "analyzer": "field\_analyzer", "search\_analyzer": "field\_analyzer" } still does not work!!!? ---
**Author:** ![nik9000](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/nik9000/32/44947_2.png) [@nik9000](https://discuss.elastic.co/u/nik9000)\ **Post date:** [March 16, 2017, 8:08pm UTC](https://discuss.elastic.co/t/query-string-in-5-1-is-case-sensitive/78886/4 "2017-03-16T20:08:39Z")
You should really wrap code in ``` so it is more readable. Could you try setting `analyze_wildcard` to `true` in the `query_string`? ---
**Author:** ![telebh](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/telebh/32/42272_2.png) [@telebh](https://discuss.elastic.co/u/telebh)\ **Post date:** [March 16, 2017, 8:13pm UTC](https://discuss.elastic.co/t/query-string-in-5-1-is-case-sensitive/78886/5 "2017-03-16T20:13:43Z")
added as follows, still no difference ```auto { "query": { "bool": { "must": [{ "query_string": { "query": "S?ith", "fields": ["authfirst"], "analyzer": "field_analyzer", "analyze_wildcard": true, "lowercase_expanded_terms": "true" } }] } } } ``` examination Output: ```auto "explanations": [ { "index": "myindex", "valid": true, "explanation": "+authfirst:S?ith" } ] } ``` ---
**Author:** ![nik9000](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/nik9000/32/44947_2.png) [@nik9000](https://discuss.elastic.co/u/nik9000)\ **Post date:** [March 16, 2017, 8:29pm UTC](https://discuss.elastic.co/t/query-string-in-5-1-is-case-sensitive/78886/6 "2017-03-16T20:29:50Z")
Weird. Can you file an issue? I'm fairly sure `analyze_wildcard` should make that work. At least it looks like it should from the docs. ---
**Author:** ![telebh](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/telebh/32/42272_2.png) [@telebh](https://discuss.elastic.co/u/telebh)\ **Post date:** [March 16, 2017, 8:31pm UTC](https://discuss.elastic.co/t/query-string-in-5-1-is-case-sensitive/78886/7 "2017-03-16T20:31:59Z")
Thanks Nik for your quick response. am still newbie to ES forum, please could you provide me details how to file an issue? the interesting thing i have same mapping file that used for ES "2.3" and that worked fine, but in ES "5.1" does not work!!!! ---
**Author:** ![nik9000](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/nik9000/32/44947_2.png) [@nik9000](https://discuss.elastic.co/u/nik9000)\ **Post date:** [March 16, 2017, 8:48pm UTC](https://discuss.elastic.co/t/query-string-in-5-1-is-case-sensitive/78886/8 "2017-03-16T20:48:21Z")
The text in the issue box on [https://github.com/elastic/elasticsearch/issues/new](https://github.com/elastic/elasticsearch/issues/new) should guide you through it pretty well. It is super important to have steps to reproduce the issue - either in the form of CONSOLE syntax or `curl` commands that you could paste into bash. ---
**Author:** ![telebh](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/telebh/32/42272_2.png) [@telebh](https://discuss.elastic.co/u/telebh)\ **Post date:** [March 17, 2017, 1:24pm UTC](https://discuss.elastic.co/t/query-string-in-5-1-is-case-sensitive/78886/9 "2017-03-17T13:24:17Z")
Thanks Nik. i have opened an issue @ [https://github.com/elastic/elasticsearch/issues/23620](https://github.com/elastic/elasticsearch/issues/23620) ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [April 14, 2017, 1:24pm UTC](https://discuss.elastic.co/t/query-string-in-5-1-is-case-sensitive/78886/10 "2017-04-14T13:24:26Z")
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