Elasticsearch 8.5 scenarios to Handle Special Characters in Query Strings Properly
I am working with Elasticsearch 8.5 and am experiencing issues when trying to query documents that contain special characters in their fields... Specifically, I have a field that stores user comments, and some comments contain characters like `&`, `%`, and `#`. When I try to search for these comments using a query string query, I receive unexpected results. For instance, when I run the following query: ```json { "query": { "query_string": { "query": "comment:\"Great job! Check this out #1\" } } } ``` I expect to see results that include comments like "Great job! Check this out #1" but instead, the results are empty. I have tried escaping the special characters in various ways but nothing seems to work. I also looked into using the `match` query, but it doesn’t seem to handle the special characters well either. Here’s a sample of what I’ve tried: ```json { "query": { "match": { "comment": "Great job! Check this out #1" } } } ``` This also returns empty results, even though I can confirm that the document exists in the index. I checked the mapping of the `comment` field, and it is set up as `text` type with a standard analyzer. I’m concerned that the analyzer might be altering how these special characters are treated during indexing and querying. Are there any best practices for querying fields with special characters in Elasticsearch? Should I consider a different approach for indexing or querying? Any insights would be greatly appreciated. Any pointers in the right direction? I'm developing on CentOS with Json. What's the correct way to implement this?