marvinlanhenke commented on code in PR #309: URL: https://github.com/apache/iceberg-rust/pull/309#discussion_r1547785953
########## crates/iceberg/src/spec/transform.rs: ########## @@ -261,6 +269,300 @@ impl Transform { _ => self == other, } } + + /// Projects a given predicate according to the transformation + /// specified by the `Transform` instance. + /// + /// This allows predicates to be effectively applied to data + /// that has undergone transformation, enabling efficient querying + /// and filtering based on the original, untransformed data. + /// + /// # Example + /// Suppose, we have row filter `a = 10`, and a partition spec + /// `bucket(a, 37) as bs`, if one row matches `a = 10`, then its partition + /// value should match `bucket(10, 37) as bs`, and we project `a = 10` to + /// `bs = bucket(10, 37)` + pub fn project(&self, name: String, predicate: &BoundPredicate) -> Result<Option<Predicate>> { + let func = create_transform_function(self)?; + + let projection = match predicate { + BoundPredicate::Unary(expr) => match self { Review Comment: @liurenjie1024 I did a refactor changing the structure (matching order). I also extracted common functionality, renamed those helpers and updated the docs. I hope not only the structure but the overall design is more readable and understandable with those changes applied? -- 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: issues-unsubscr...@iceberg.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: issues-unsubscr...@iceberg.apache.org For additional commands, e-mail: issues-h...@iceberg.apache.org