Is there an existing issue for the same bug?

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Branch Name

main

Commit ID

7b1a043

Other Environment Information

• Hardware parameters:
• OS type: Linux
• Others:

Actual Behavior

Prepared-statement binary execute on main does not handle MYSQL_TYPE_JSON parameters. When a client sends a JSON-typed parameter in COM_STMT_EXECUTE, ParseExecuteData falls through to the default branch and returns unsupport parameter type.

Expected Behavior

MYSQL_TYPE_JSON parameters should be parsed like other length-encoded string payloads and reach statement execution successfully.

Steps to Reproduce

1. Prepare a statement with a JSON placeholder, for example select ? or insert into t values (?) where the target parameter is JSON.
2. Execute it through the MySQL binary prepared-statement protocol with the parameter type set to MYSQL_TYPE_JSON and a valid JSON payload.
3. Observe that main returns unsupport parameter type from ParseExecuteData.

Additional information

Local focused regression coverage for the fix:

• TestParseExecuteDataWithJSONParam