CTTY commented on code in PR #3564: URL: https://github.com/apache/iceberg-rust/pull/3564#discussion_r4395471808
########## crates/iceberg/src/transaction/snapshot/merging.rs: ########## @@ -0,0 +1,544 @@ +// 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. + +//! Persistent producer for snapshot actions that add and remove data and +//! delete files. + +use std::collections::{HashMap, HashSet}; + +use uuid::Uuid; + +use super::manifest_filter::ManifestFilterManager; +use super::{ + SnapshotCommitInput, current_manifests, generate_snapshot_id, manifest_list_path, + manifest_path, validate_partition_value, write_added_manifest, write_snapshot_commit, +}; +use crate::error::{Result, invalid_data}; +use crate::spec::{DataFile, FormatVersion, ManifestContentType, ManifestFile, Operation}; +use crate::table::Table; +use crate::transaction::ActionCommit; + +/// What a merging action asks the producer to do. +/// +/// Fixed for one logical execution; the producer derives everything else from +/// it and the table of the current attempt. The action validates the +/// table-independent parts (content types, disjoint add/remove sets) before +/// each attempt. +pub(crate) struct MergingIntent { + /// Overrides the generated commit UUID. + pub commit_uuid: Option<Uuid>, + pub operation: Operation, + pub snapshot_properties: HashMap<String, String>, + pub added_data_files: Vec<DataFile>, + pub added_delete_files: Vec<DataFile>, + pub removed_data_files: Vec<DataFile>, + pub removed_delete_files: Vec<DataFile>, + /// Whether the summary resets table totals (a full-table overwrite). + pub truncate_full_table: bool, +} + +/// Retry-persistent state for an action that adds and removes data and delete +/// files. +/// +/// One producer lives for one logical execution of an action and is driven once +/// per attempt via [`MergingSnapshotProducer::apply`]. Per attempt it takes the +/// current snapshot's manifests, rewrites those that reference a removed file, +/// appends manifests for the added files, and writes a manifest list. Identity +/// (commit UUID, snapshot id) is fixed on first use; rewritten and added +/// manifests are reused across attempts while their inputs are unchanged. +pub(crate) struct MergingSnapshotProducer { + intent: MergingIntent, + /// Fixed when the producer is created, so every attempt shares one UUID. + commit_uuid: Uuid, + /// Resolved against the table on the first attempt, then stable. + snapshot_id: Option<i64>, + /// Incremented per attempt; distinguishes manifest-list paths. + attempt: u64, + /// Numbers every manifest this producer writes, including rewrites. Never + /// reset, so paths never collide across attempts. + manifest_counter: u64, + data_filter: ManifestFilterManager, + delete_filter: ManifestFilterManager, + /// Manifests written for the added files, reused across attempts. + added_manifests: Option<AddedManifests>, + /// Metadata files written by this producer (manifests and every attempt's + /// manifest list). + // TODO(#3417): consumed by terminal cleanup once it is wired up. + owned_artifacts: HashSet<String>, +} + +/// The manifests written for one execution's added data and delete files. +/// +/// Reusable while the table's format version is unchanged; see +/// `simple::AddedManifests` for why. +struct AddedManifests { + manifests: Vec<ManifestFile>, + format_version: FormatVersion, +} Review Comment: We should reuse this with simple::AddedManifest ########## crates/iceberg/src/transaction/snapshot/manifest_filter.rs: ########## @@ -0,0 +1,225 @@ +// 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. + +//! Rewrites existing manifests to mark files as deleted. + +use std::collections::{HashMap, HashSet}; + +use uuid::Uuid; + +use super::{manifest_path, new_manifest_writer}; +use crate::error::{Result, invalid_data}; +use crate::spec::{DataFile, FormatVersion, ManifestContentType, ManifestFile}; +use crate::table::Table; + +/// Removes a fixed set of files from the manifests of one content type. +/// +/// One manager lives for one logical execution of an action and is driven +/// once per attempt via [`ManifestFilterManager::filter`]. A manifest that +/// references none of the requested files passes through untouched. One that +/// does is rewritten with those entries marked `Deleted` and the rest +/// `Existing`; the rewrite is keyed by the source manifest's path, which is +/// immutable, so a rebase only rewrites manifests not seen before. +pub(crate) struct ManifestFilterManager { + content: ManifestContentType, + /// Paths of the files to remove. Fixed for the execution. + requested_paths: HashSet<String>, + /// Source manifest path → rewritten result. + filtered: HashMap<String, FilteredManifest>, + /// Format version the rewrites were written under. Per spec, v1 entries + /// cannot inherit sequence numbers, so an upgrade invalidates them. + format_version: Option<FormatVersion>, + /// Metadata files written by this manager. + owned_artifacts: HashSet<String>, +} + +/// One rewritten manifest and the files it marked as deleted. +#[derive(Clone)] +struct FilteredManifest { + manifest: ManifestFile, + removed_files: Vec<DataFile>, +} + +/// The result of one filter pass. +pub(crate) struct Filtered { + /// The resulting manifests, in input order. + pub manifests: Vec<ManifestFile>, + /// The files that were live and are now marked deleted, including their + /// metrics as read from the source manifests. + pub removed_files: Vec<DataFile>, +} + +impl ManifestFilterManager { + pub(crate) fn new(content: ManifestContentType, removed_files: &[DataFile]) -> Self { + Self { + content, + requested_paths: removed_files + .iter() + .map(|f| f.file_path().to_string()) + .collect(), + filtered: HashMap::new(), + format_version: None, + owned_artifacts: HashSet::new(), + } + } + + /// Metadata files written by this manager so far. + pub(crate) fn owned_artifacts(&self) -> &HashSet<String> { + &self.owned_artifacts + } + + /// Applies the removals to `manifests`, rewriting those of this manager's + /// content type that reference a requested file. + /// + /// Fails if a requested file is not live in any manifest: it was never in + /// the table, or a concurrent commit already removed it. + /// + /// `next_manifest_number` allocates paths for rewritten manifests from the + /// producer's counter, so they never collide with other manifests it writes. + pub(crate) async fn filter( + &mut self, + table: &Table, + snapshot_id: i64, + commit_uuid: Uuid, + manifests: Vec<ManifestFile>, + next_manifest_number: &mut u64, + ) -> Result<Filtered> { + if self.requested_paths.is_empty() { + return Ok(Filtered { + manifests, + removed_files: Vec::new(), + }); + } + + let format_version = table.metadata().format_version(); + if self.format_version != Some(format_version) { + self.filtered.clear(); + self.format_version = Some(format_version); + } + + let mut out = Vec::with_capacity(manifests.len()); + let mut removed_files: Vec<DataFile> = Vec::new(); + + for source in manifests { + if source.content != self.content { + out.push(source); + continue; + } + + let result = match self.filtered.get(&source.manifest_path) { + Some(cached) => cached.clone(), + None => { + let result = self + .rewrite( + table, + snapshot_id, + commit_uuid, + &source, + next_manifest_number, + ) + .await?; + self.filtered + .insert(source.manifest_path.clone(), result.clone()); + result + } + }; + + removed_files.extend(result.removed_files); + out.push(result.manifest); + } + + let found: HashSet<&str> = removed_files.iter().map(|f| f.file_path()).collect(); + let mut missing: Vec<&str> = self + .requested_paths + .iter() + .map(String::as_str) + .filter(|p| !found.contains(p)) + .collect(); + if !missing.is_empty() { + missing.sort_unstable(); Review Comment: why sort here? We can just fail ########## crates/iceberg/src/transaction/snapshot/manifest_filter.rs: ########## @@ -0,0 +1,225 @@ +// 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. + +//! Rewrites existing manifests to mark files as deleted. + +use std::collections::{HashMap, HashSet}; + +use uuid::Uuid; + +use super::{manifest_path, new_manifest_writer}; +use crate::error::{Result, invalid_data}; +use crate::spec::{DataFile, FormatVersion, ManifestContentType, ManifestFile}; +use crate::table::Table; + +/// Removes a fixed set of files from the manifests of one content type. +/// +/// One manager lives for one logical execution of an action and is driven +/// once per attempt via [`ManifestFilterManager::filter`]. A manifest that +/// references none of the requested files passes through untouched. One that +/// does is rewritten with those entries marked `Deleted` and the rest +/// `Existing`; the rewrite is keyed by the source manifest's path, which is +/// immutable, so a rebase only rewrites manifests not seen before. +pub(crate) struct ManifestFilterManager { + content: ManifestContentType, + /// Paths of the files to remove. Fixed for the execution. + requested_paths: HashSet<String>, Review Comment: ```suggestion files_to_remove: HashSet<String>, ``` ########## crates/iceberg/src/transaction/snapshot/merging.rs: ########## @@ -0,0 +1,544 @@ +// 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. + +//! Persistent producer for snapshot actions that add and remove data and +//! delete files. + +use std::collections::{HashMap, HashSet}; + +use uuid::Uuid; + +use super::manifest_filter::ManifestFilterManager; +use super::{ + SnapshotCommitInput, current_manifests, generate_snapshot_id, manifest_list_path, + manifest_path, validate_partition_value, write_added_manifest, write_snapshot_commit, +}; +use crate::error::{Result, invalid_data}; +use crate::spec::{DataFile, FormatVersion, ManifestContentType, ManifestFile, Operation}; +use crate::table::Table; +use crate::transaction::ActionCommit; + +/// What a merging action asks the producer to do. +/// +/// Fixed for one logical execution; the producer derives everything else from +/// it and the table of the current attempt. The action validates the +/// table-independent parts (content types, disjoint add/remove sets) before +/// each attempt. +pub(crate) struct MergingIntent { Review Comment: Can we merge MergeIntent and AppendIntent struct? ########## crates/iceberg/src/transaction/snapshot/manifest_filter.rs: ########## @@ -0,0 +1,225 @@ +// 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. + +//! Rewrites existing manifests to mark files as deleted. + +use std::collections::{HashMap, HashSet}; + +use uuid::Uuid; + +use super::{manifest_path, new_manifest_writer}; +use crate::error::{Result, invalid_data}; +use crate::spec::{DataFile, FormatVersion, ManifestContentType, ManifestFile}; +use crate::table::Table; + +/// Removes a fixed set of files from the manifests of one content type. +/// +/// One manager lives for one logical execution of an action and is driven +/// once per attempt via [`ManifestFilterManager::filter`]. A manifest that +/// references none of the requested files passes through untouched. One that +/// does is rewritten with those entries marked `Deleted` and the rest +/// `Existing`; the rewrite is keyed by the source manifest's path, which is +/// immutable, so a rebase only rewrites manifests not seen before. +pub(crate) struct ManifestFilterManager { + content: ManifestContentType, + /// Paths of the files to remove. Fixed for the execution. + requested_paths: HashSet<String>, + /// Source manifest path → rewritten result. + filtered: HashMap<String, FilteredManifest>, + /// Format version the rewrites were written under. Per spec, v1 entries + /// cannot inherit sequence numbers, so an upgrade invalidates them. + format_version: Option<FormatVersion>, + /// Metadata files written by this manager. + owned_artifacts: HashSet<String>, +} + +/// One rewritten manifest and the files it marked as deleted. +#[derive(Clone)] +struct FilteredManifest { + manifest: ManifestFile, + removed_files: Vec<DataFile>, +} + +/// The result of one filter pass. +pub(crate) struct Filtered { + /// The resulting manifests, in input order. + pub manifests: Vec<ManifestFile>, + /// The files that were live and are now marked deleted, including their + /// metrics as read from the source manifests. + pub removed_files: Vec<DataFile>, +} + +impl ManifestFilterManager { + pub(crate) fn new(content: ManifestContentType, removed_files: &[DataFile]) -> Self { + Self { + content, + requested_paths: removed_files + .iter() + .map(|f| f.file_path().to_string()) + .collect(), + filtered: HashMap::new(), + format_version: None, + owned_artifacts: HashSet::new(), + } + } + + /// Metadata files written by this manager so far. + pub(crate) fn owned_artifacts(&self) -> &HashSet<String> { + &self.owned_artifacts + } + + /// Applies the removals to `manifests`, rewriting those of this manager's + /// content type that reference a requested file. + /// + /// Fails if a requested file is not live in any manifest: it was never in + /// the table, or a concurrent commit already removed it. + /// + /// `next_manifest_number` allocates paths for rewritten manifests from the + /// producer's counter, so they never collide with other manifests it writes. + pub(crate) async fn filter( + &mut self, + table: &Table, + snapshot_id: i64, + commit_uuid: Uuid, + manifests: Vec<ManifestFile>, + next_manifest_number: &mut u64, + ) -> Result<Filtered> { + if self.requested_paths.is_empty() { + return Ok(Filtered { + manifests, + removed_files: Vec::new(), + }); + } + + let format_version = table.metadata().format_version(); + if self.format_version != Some(format_version) { + self.filtered.clear(); + self.format_version = Some(format_version); + } + + let mut out = Vec::with_capacity(manifests.len()); + let mut removed_files: Vec<DataFile> = Vec::new(); + + for source in manifests { + if source.content != self.content { + out.push(source); + continue; + } Review Comment: Why would this happen? Should we just fail here? ########## crates/iceberg/src/transaction/snapshot/manifest_filter.rs: ########## @@ -0,0 +1,225 @@ +// 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. + +//! Rewrites existing manifests to mark files as deleted. + +use std::collections::{HashMap, HashSet}; + +use uuid::Uuid; + +use super::{manifest_path, new_manifest_writer}; +use crate::error::{Result, invalid_data}; +use crate::spec::{DataFile, FormatVersion, ManifestContentType, ManifestFile}; +use crate::table::Table; + +/// Removes a fixed set of files from the manifests of one content type. +/// +/// One manager lives for one logical execution of an action and is driven +/// once per attempt via [`ManifestFilterManager::filter`]. A manifest that +/// references none of the requested files passes through untouched. One that +/// does is rewritten with those entries marked `Deleted` and the rest +/// `Existing`; the rewrite is keyed by the source manifest's path, which is +/// immutable, so a rebase only rewrites manifests not seen before. +pub(crate) struct ManifestFilterManager { + content: ManifestContentType, + /// Paths of the files to remove. Fixed for the execution. + requested_paths: HashSet<String>, + /// Source manifest path → rewritten result. + filtered: HashMap<String, FilteredManifest>, + /// Format version the rewrites were written under. Per spec, v1 entries + /// cannot inherit sequence numbers, so an upgrade invalidates them. + format_version: Option<FormatVersion>, + /// Metadata files written by this manager. + owned_artifacts: HashSet<String>, +} + +/// One rewritten manifest and the files it marked as deleted. +#[derive(Clone)] +struct FilteredManifest { + manifest: ManifestFile, + removed_files: Vec<DataFile>, +} + +/// The result of one filter pass. +pub(crate) struct Filtered { + /// The resulting manifests, in input order. + pub manifests: Vec<ManifestFile>, + /// The files that were live and are now marked deleted, including their + /// metrics as read from the source manifests. + pub removed_files: Vec<DataFile>, +} + +impl ManifestFilterManager { + pub(crate) fn new(content: ManifestContentType, removed_files: &[DataFile]) -> Self { + Self { + content, + requested_paths: removed_files + .iter() + .map(|f| f.file_path().to_string()) + .collect(), + filtered: HashMap::new(), + format_version: None, + owned_artifacts: HashSet::new(), + } + } + + /// Metadata files written by this manager so far. + pub(crate) fn owned_artifacts(&self) -> &HashSet<String> { + &self.owned_artifacts + } + + /// Applies the removals to `manifests`, rewriting those of this manager's + /// content type that reference a requested file. + /// + /// Fails if a requested file is not live in any manifest: it was never in + /// the table, or a concurrent commit already removed it. + /// + /// `next_manifest_number` allocates paths for rewritten manifests from the + /// producer's counter, so they never collide with other manifests it writes. + pub(crate) async fn filter( + &mut self, + table: &Table, + snapshot_id: i64, + commit_uuid: Uuid, + manifests: Vec<ManifestFile>, + next_manifest_number: &mut u64, + ) -> Result<Filtered> { + if self.requested_paths.is_empty() { + return Ok(Filtered { + manifests, + removed_files: Vec::new(), + }); + } + + let format_version = table.metadata().format_version(); + if self.format_version != Some(format_version) { + self.filtered.clear(); + self.format_version = Some(format_version); + } Review Comment: why this? shouldn't we set format version if it's None, and fail if it doesn't match? ########## crates/iceberg/src/transaction/snapshot/merging.rs: ########## @@ -0,0 +1,544 @@ +// 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. + +//! Persistent producer for snapshot actions that add and remove data and +//! delete files. + +use std::collections::{HashMap, HashSet}; + +use uuid::Uuid; + +use super::manifest_filter::ManifestFilterManager; +use super::{ + SnapshotCommitInput, current_manifests, generate_snapshot_id, manifest_list_path, + manifest_path, validate_partition_value, write_added_manifest, write_snapshot_commit, +}; +use crate::error::{Result, invalid_data}; +use crate::spec::{DataFile, FormatVersion, ManifestContentType, ManifestFile, Operation}; +use crate::table::Table; +use crate::transaction::ActionCommit; + +/// What a merging action asks the producer to do. +/// +/// Fixed for one logical execution; the producer derives everything else from +/// it and the table of the current attempt. The action validates the +/// table-independent parts (content types, disjoint add/remove sets) before +/// each attempt. +pub(crate) struct MergingIntent { + /// Overrides the generated commit UUID. + pub commit_uuid: Option<Uuid>, + pub operation: Operation, + pub snapshot_properties: HashMap<String, String>, + pub added_data_files: Vec<DataFile>, + pub added_delete_files: Vec<DataFile>, + pub removed_data_files: Vec<DataFile>, + pub removed_delete_files: Vec<DataFile>, + /// Whether the summary resets table totals (a full-table overwrite). + pub truncate_full_table: bool, +} + +/// Retry-persistent state for an action that adds and removes data and delete +/// files. +/// +/// One producer lives for one logical execution of an action and is driven once +/// per attempt via [`MergingSnapshotProducer::apply`]. Per attempt it takes the +/// current snapshot's manifests, rewrites those that reference a removed file, +/// appends manifests for the added files, and writes a manifest list. Identity +/// (commit UUID, snapshot id) is fixed on first use; rewritten and added +/// manifests are reused across attempts while their inputs are unchanged. +pub(crate) struct MergingSnapshotProducer { + intent: MergingIntent, + /// Fixed when the producer is created, so every attempt shares one UUID. + commit_uuid: Uuid, + /// Resolved against the table on the first attempt, then stable. + snapshot_id: Option<i64>, + /// Incremented per attempt; distinguishes manifest-list paths. + attempt: u64, + /// Numbers every manifest this producer writes, including rewrites. Never + /// reset, so paths never collide across attempts. + manifest_counter: u64, + data_filter: ManifestFilterManager, + delete_filter: ManifestFilterManager, + /// Manifests written for the added files, reused across attempts. + added_manifests: Option<AddedManifests>, + /// Metadata files written by this producer (manifests and every attempt's + /// manifest list). + // TODO(#3417): consumed by terminal cleanup once it is wired up. + owned_artifacts: HashSet<String>, +} + +/// The manifests written for one execution's added data and delete files. +/// +/// Reusable while the table's format version is unchanged; see +/// `simple::AddedManifests` for why. +struct AddedManifests { + manifests: Vec<ManifestFile>, + format_version: FormatVersion, +} + +impl MergingSnapshotProducer { + pub(crate) fn new(intent: MergingIntent) -> Self { + Self { + commit_uuid: intent.commit_uuid.unwrap_or_else(Uuid::now_v7), + data_filter: ManifestFilterManager::new( + ManifestContentType::Data, + &intent.removed_data_files, + ), + delete_filter: ManifestFilterManager::new( + ManifestContentType::Deletes, + &intent.removed_delete_files, + ), + intent, + snapshot_id: None, + attempt: 0, + manifest_counter: 0, + added_manifests: None, + owned_artifacts: HashSet::new(), + } + } + + /// Produces the resulting manifest set for the current table and writes + /// this attempt's snapshot. + pub(crate) async fn apply(&mut self, table: &Table) -> Result<ActionCommit> { Review Comment: Seems like we currently have no logic to validate new deletes or overwrite? -- This is an automated message from the Apache Git Service. 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