[Elastic search] wildcard (ignore case) query is not working

I have a problem when using wildcard (ignore case) query. I am using v7.10.2


Lower case

I have 2 query, the first is uppercase, the other is not. My expected output is both query will return the same result.
But it's not.

My guess is that ES doesn't support Vietnamese language.

Any idea?

Thank you.


Please don't post images of text as they are hard to read, may not display correctly for everyone, and are not searchable.

Instead, paste the text and format it with </> icon or pairs of triple backticks (```), and check the preview window to make sure it's properly formatted before posting it. This makes it more likely that your question will receive a useful answer.

It would be great if you could update your post to solve this.

Another thing unrelated to your problem, please upgrade your cluster!

Could you provide a full recreation script as described in About the Elasticsearch category. It will help to better understand what you are doing. Please, try to keep the example as simple as possible.

A full reproduction script is something anyone can copy and paste in Kibana dev console, click on the run button to reproduce your use case. It will help readers to understand, reproduce and if needed fix your problem. It will also most likely help to get a faster answer.

Hi @K_Nam

For this scenario I would use the normalizer with a lowercase filter, so you will be able to get results with both ways.

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