liukun4515 commented on issue #122: URL: https://github.com/apache/arrow-datafusion/issues/122#issuecomment-976109767
In order to implement decimal in datafusion, we should ref some data type rules, like [spark data type](https://spark.apache.org/docs/3.2.0/sql-ref-datatypes.html) and [type coercion](https://spark.apache.org/docs/3.2.0/sql-ref-ansi-compliance.html#type-promotion-and-precedence). Now, the numerical data type just support some native type and the type coercion rules are simple. if we add the decimal data type, the type checking, type cast, type promotion and precision checking are all need to be considered. -- 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]
