xuzifu666 commented on PR #4784:
URL: https://github.com/apache/calcite/pull/4784#issuecomment-3846954563

   > I'm not an expert in ClickHouse, but [the 
documentation](https://clickhouse.com/docs/sql-reference/functions/url-functions)
 suggests ClickHouse calls these functions `encodeURLComponent` and 
`decodeURLComponent`. Since we're talking about changes to the ClickHouse 
dialect, it would be good to match these names.
   
   @michaelmior Thank you for the suggestion. Here's my understanding: this PR 
mainly addresses two things:
   
   1. It enables the ClickHouse Library to recognize the ```url_encode``` and 
```url_decode``` functions;
   
   2. It accurately converts SQL from Calcite to the correct ClickHouse 
dialect, as explained in the documentation, for example, converting 
```url_encode``` to ```encodeURLComponent```.
   
   Since this name is specific to the ClickHouse dialect, it seems unnecessary 
to introduce a function with the same implementation but a different name. This 
can be seen in ```RelToSqlConvertTest```, where the dialect-converted name is 
correct. I wonder if you agree with my point of view.


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