# Mappings Issue

**URL:** <https://discuss.elastic.co/t/mappings-issue/330797>\
**Category:** Elasticsearch\
**Created:** [April 26, 2023, 7:38am UTC](https://discuss.elastic.co/t/mappings-issue/330797 "2023-04-26T07:38:09Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Dasher](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dasher/32/137841_2.png) [@Dasher](https://discuss.elastic.co/u/Dasher)\
**Post date:** [April 26, 2023, 7:38am UTC](https://discuss.elastic.co/t/mappings-issue/330797/1 "2023-04-26T07:38:09Z")

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Hi,  
I have a field in my index with the mapping and custom analyzer has followed:  
Mapping:  
"BookingNo" : {  
"type" : "text",  
"fields" : {  
"lowercase\_keyword" : {  
"type" : "text",  
"analyzer" : "lowercase\_keyword\_analyzer"  
}  
}  
}  
custom analyzer:  
"analysis" : {  
"analyzer" : {  
"lowercase\_keyword\_analyzer" : {  
"filter" : [  
"lowercase"  
],  
"type" : "custom",  
"tokenizer" : "keyword"  
}  
}  
}  
When i try to search whether the field exist in the document using the query

GET index-name/\_search  
{  
"query": {  
"bool": {  
"must": {  
"exists": {  
"field": "BookingNo.lowercase\_keyword"  
}  
}  
}  
}  
}

It returns around 1500 document but when i check those documents the field doesn't exist  
What could be the reason for it?

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<div class="post-metadata">

**Author:** ![warkolm](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/warkolm/32/39224_2.png) [@warkolm](https://discuss.elastic.co/u/warkolm)\
**Post date:** [April 30, 2023, 11:17pm UTC](https://discuss.elastic.co/t/mappings-issue/330797/2 "2023-04-30T23:17:15Z")

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Please format your code/logs/config using the `</>` button, or markdown style back ticks. It helps to make things easy to read which helps us help you 🙂

It'd be useful if you shared an example document that is being returned that doesn't have the field.

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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 28, 2023, 11:17pm UTC](https://discuss.elastic.co/t/mappings-issue/330797/3 "2023-05-28T23:17:29Z")

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