GitHub user sunng87 closed a discussion: Recommended design for accessing context/session information in UDF implementation
As for now, most datafusion udfs are focusing on data. When I'm going to implement some functions like `database()` or `version()`, I just realized there is no simple way to access information of current session. For example, in MySQL `SELECT database()` returns current selected database. If we implement `database` as a UDF, we will need to access current session on calling `ScalarFunctionImplementation`. However, the function signature only accepts input data. Another use case is to access time-zone or locale settings from current session when implementing a date/time related function. While the function system is under a major refactoring, you may want to add this feature into consideration. Thank you! GitHub link: https://github.com/apache/datafusion/discussions/8871 ---- This is an automatically sent email for [email protected]. To unsubscribe, please send an email to: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
