sdd commented on code in PR #360: URL: https://github.com/apache/iceberg-rust/pull/360#discussion_r1583577520
########## crates/iceberg/src/scan.rs: ########## @@ -314,6 +312,140 @@ impl TableScan { } } +#[derive(Debug)] +/// Holds the context necessary for file scanning operations +/// in a streaming environment. +struct FileScanStreamContext { + schema: SchemaRef, + snapshot: SnapshotRef, + table_metadata: TableMetadataRef, + file_io: FileIO, + filter: Option<Arc<Predicate>>, + case_sensitive: bool, +} + +impl FileScanStreamContext { + /// Creates a new [`FileScanStreamContext`]. + fn new( + schema: SchemaRef, + snapshot: SnapshotRef, + table_metadata: TableMetadataRef, + file_io: FileIO, + filter: Option<Arc<Predicate>>, + case_sensitive: bool, + ) -> Self { + Self { + schema, + snapshot, + table_metadata, + file_io, + filter, + case_sensitive, + } + } + + /// Creates a [`BoundPredicate`] from row filter [`Predicate`]. + fn bound_filter(&self) -> Result<Option<BoundPredicate>> { + match self.filter { + Some(ref filter) => Ok(Some(filter.bind(self.schema.clone(), self.case_sensitive)?)), + None => Ok(None), + } + } + + /// Creates a reference-counted [`PartitionSpec`] and a + /// corresponding schema based on the specified partition spec id. + fn create_partition_spec_and_schema( + &self, + spec_id: i32, + ) -> Result<(&PartitionSpecRef, SchemaRef)> { Review Comment: Seems a bit unexpected to return an `&PartitionSpecRef`. Usually you'd return either a `PartitionSpecRef` or a `&PartitionSpec`. Could we also do this up-front in `new` or just once, storing the `PartitionSpecRef` and `SchemaRef` in the context so that this method just clones those `Arc`s from the context? -- 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