CTTY commented on code in PR #1735: URL: https://github.com/apache/iceberg-rust/pull/1735#discussion_r2433605077
########## crates/iceberg/src/writer/partitioning/fanout_writer.rs: ########## @@ -0,0 +1,386 @@ +// Licensed to the Apache Software Foundation (ASF) under one +// or more contributor license agreements. See the NOTICE file +// distributed with this work for additional information +// regarding copyright ownership. The ASF licenses this file +// to you under the Apache License, Version 2.0 (the +// "License"); you may not use this file except in compliance +// with the License. You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, +// software distributed under the License is distributed on an +// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY +// KIND, either express or implied. See the License for the +// specific language governing permissions and limitations +// under the License. + +//! This module provides the `FanoutWriter` implementation. + +use std::collections::HashMap; +use std::marker::PhantomData; + +use async_trait::async_trait; + +use crate::spec::{PartitionKey, Struct}; +use crate::writer::partitioning::PartitioningWriter; +use crate::writer::{DefaultInput, DefaultOutput, IcebergWriter, IcebergWriterBuilder}; +use crate::{Error, ErrorKind, Result}; + +/// A writer that can write data to multiple partitions simultaneously. +/// +/// Unlike `ClusteredWriter` which expects sorted input and maintains only one active writer, +/// `FanoutWriter` can handle unsorted data by maintaining multiple active writers in a map. +/// This allows writing to any partition at any time, but uses more memory as all writers +/// remain active until the writer is closed. +/// +/// # Type Parameters +/// +/// * `B` - The inner writer builder type +/// * `I` - Input type (defaults to `RecordBatch`) +/// * `O` - Output collection type (defaults to `Vec<DataFile>`) +#[derive(Clone)] Review Comment: Good point! Removed from both Fanout and ClusteredWriter -- 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]
