hozan23 opened a new issue, #26882: URL: https://github.com/apache/datafusion/issues/26882
### Describe the bug `MySqlDialect` overrides `int32_cast_dtype` and `int64_cast_dtype` to return `SIGNED`, but does not override `int8_cast_dtype`. An `Int8` cast therefore unparses with the default `TINYINT`. MySQL's `CAST` does not accept `TINYINT` as a target type (see the [permitted types](https://dev.mysql.com/doc/refman/8.0/en/cast-functions.html#function_cast)). ### To Reproduce ```rust let unparser = Unparser::new(&MySqlDialect {}); let expr = Expr::Cast(Cast::new(Box::new(col("a")), DataType::Int8)); println!("{}", unparser.expr_to_sql(&expr)?); // CAST(`a` AS TINYINT) ``` ### Expected behavior CAST(`a` AS SIGNED), the same as `Int32` and `Int64` casts. ### Additional context _No response_ ### Willingness to contribute I plan to contribute a fix for this bug independently -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
