thswlsqls opened a new pull request, #39140:
URL: https://github.com/apache/shardingsphere/pull/39140

   
   Fixes #39139.
   
   Changes proposed in this pull request:
     - Decode MySQL JSON binlog string values (`decodeString`) and object keys 
(`decodeKeyEntry`) with `StandardCharsets.UTF_8` instead of `new 
String(byte[])`, which relies on the JVM default charset and corrupts non-ASCII 
data on non-UTF-8-default JVMs.
     - MySQL JSON is stored as utf8mb4 (already noted in the class Javadoc for 
the STRING type); this aligns the decoder with `MySQLPacketPayload`, which 
always reads bytes with an explicit charset.
     - Add a `MySQLJsonValueDecoderTest` case decoding a multibyte UTF-8 key 
and value (`{"名前":"café"}`) from explicit UTF-8 bytes, asserting the utf8mb4 
contract. On a UTF-8-default JVM it acts as a regression/contract guard; it 
also catches corruption on non-UTF-8-default JVMs.
   
   ---
   
   Before committing this PR, I'm sure that I have checked the following 
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   - [x] My code follows the [code of 
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of this project.
   - [x] I have self-reviewed the commit code.
   - [ ] I have (or in comment I request) added corresponding labels for the 
pull request.
   - [x] I have passed maven check locally : `./mvnw clean install -B -T1C 
-Dmaven.javadoc.skip -Dmaven.jacoco.skip -e`.
   - [ ] I have made corresponding changes to the documentation.
   - [x] I have added corresponding unit tests for my changes.
   - [x] I have updated the Release Notes of the current development version. 
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