# What is default index analyzer? **URL:** \ **Category:** Elasticsearch\ **Created:** [December 19, 2016, 7:44am UTC](https://discuss.elastic.co/t/what-is-default-index-analyzer/69402 "2016-12-19T07:44:04Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![Youxu](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/youxu/32/117375_2.png) [@Youxu](https://discuss.elastic.co/u/Youxu)\ **Post date:** [December 19, 2016, 7:44am UTC](https://discuss.elastic.co/t/what-is-default-index-analyzer/69402/1 "2016-12-19T07:44:04Z")
I though default analyzer is "standard" analyzer, but per my following experimentation, seems not. 1. Create index with customized standard analyzer which included a pattern\_capture filter to split words by "." or "\_" ```auto POST / myindex { "settings" : { "analysis" : { "filter" : { "customsplit" : { "type" : "pattern_capture", "preserve_original" : 1, "patterns" : [ "([^_.]+)" ] } }, "analyzer" : { "standard" : { "tokenizer" : "standard", "filter" : [ "lowercase", "customsplit" ] } } } }, "mappings" : { "docs" : { "properties" : { "Url" : { "type" : "string" } } } } } ``` 1. Insert one doc to myindex ```auto POST /myindex/docs/1 { "Url": "www.xyz.com" } ``` Per \_analyze API, the standard analyzer used by myindex DOES split the word by "." ```auto GET /myindex/_analyze?analyzer=standard&text=www.xyz.com ``` output: ```auto { "tokens": [ { "token": "www.xyz.com", "start_offset": 0, "end_offset": 11, "type": "", "position": 1 }, { "token": "www", "start_offset": 0, "end_offset": 11, "type": "", "position": 1 }, { "token": "xyz", "start_offset": 0, "end_offset": 11, "type": "", "position": 1 }, { "token": "com", "start_offset": 0, "end_offset": 11, "type": "", "position": 1 } ] } ``` BUT, the problem is, if I search "xyz" from myindex, nothing returned: ```auto POST /myindex/_search { "query": { "match": { "Url": "xyz" } } } ``` BUT, if I explicitly set the analyzer to "standard" in index mapping: ```auto mappings": { "docs": { "properties": { "Url": { "type": "string", "analyzer": "standard" } } } ``` Then searching "xyz" can return the documents. SO my question is: Is "standard" really default analyzer of ES index? if NOT, how to set default analyzer? Or anything wrong in my above testing steps, if standard is indeed the default analyzer? ---
**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:** [December 19, 2016, 8:04am UTC](https://discuss.elastic.co/t/what-is-default-index-analyzer/69402/2 "2016-12-19T08:04:38Z")
Please format your code using `` icon as explained in [this guide](https://discuss.elastic.co/t/about-the-elasticsearch-category/21). It will make your post more readable. The standard analyzer is explained here: [https://www.elastic.co/guide/en/elasticsearch/reference/5.1/analysis-standard-analyzer.html](https://www.elastic.co/guide/en/elasticsearch/reference/5.1/analysis-standard-analyzer.html) As per [https://www.elastic.co/guide/en/elasticsearch/reference/5.1/analysis.html#\_specifying\_an\_index\_time\_analyzer](https://www.elastic.co/guide/en/elasticsearch/reference/5.1/analysis.html#_specifying_an_index_time_analyzer), the default analyzer is the standard one. ---
**Author:** ![Youxu](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/youxu/32/117375_2.png) [@Youxu](https://discuss.elastic.co/u/Youxu)\ **Post date:** [December 19, 2016, 8:47am UTC](https://discuss.elastic.co/t/what-is-default-index-analyzer/69402/3 "2016-12-19T08:47:20Z")
Thanks David. Yes, per ES reference, "standard" analyzer should be default analyzer. But then, anything wrong with my testing? Does the default "standard" used just mean the built-in standard analyzer, but not the customized "standard" as defined in my setting? ---
**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:** [December 19, 2016, 9:55am UTC](https://discuss.elastic.co/t/what-is-default-index-analyzer/69402/4 "2016-12-19T09:55:13Z")
That's interesting. Indeed, you can't here "overwrite" the `standard` analyzer which is built in elasticsearch. The proper way to solve your issue for now is to do something like: ```auto DELETE myindex PUT myindex { "settings": { "analysis": { "filter": { "customsplit": { "type": "pattern_capture", "preserve_original": 1, "patterns": [ "([^_.]+)" ] } }, "analyzer": { "my_analyzer": { "tokenizer": "standard", "filter": [ "lowercase", "customsplit" ] } } } }, "mappings": { "docs": { "properties": { "Url": { "type": "string", "analyzer": "my_analyzer" } } } } } PUT /myindex/docs/1 { "Url": "www.xyz.com" } GET /myindex/_analyze?analyzer=my_analyzer&text=www.xyz.com POST /myindex/_search { "query": { "match": { "Url": "xyz" } } } ``` May be open an issue on github and refer to this ticket? I think that we should either reject that you are using `standard` as an analyzer name or pick the right one when running `_search`. Here I think we are using the built-in one at search time instead of the one which is defined within your index. Thanks for reporting! ---
**Author:** ![Youxu](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/youxu/32/117375_2.png) [@Youxu](https://discuss.elastic.co/u/Youxu)\ **Post date:** [December 19, 2016, 1:04pm UTC](https://discuss.elastic.co/t/what-is-default-index-analyzer/69402/5 "2016-12-19T13:04:32Z")
Thanks David. Yes, I can resolve this issue by explicitly setting the "standard" analyzer to "Url" field. This issue seems to me a bug of Elasticsearch. As you said, ES should either reject "standard" as an analyzer name in customized analyzer setting or pick the right one when running \_search. I will open this issue on GitHub, if not opened yet. ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [January 16, 2017, 1:04pm UTC](https://discuss.elastic.co/t/what-is-default-index-analyzer/69402/6 "2017-01-16T13:04:50Z")
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