iceberg::MergeAppend Class Reference

API for appending new files in a table while merging manifests. More...

#include <merge_append.h>

Inheritance diagram for iceberg::MergeAppend:

Public Member Functions
MergeAppend &	AppendFile (const std::shared_ptr< DataFile > &file)
	Append a DataFile to the table.
MergeAppend &	AppendManifest (const ManifestFile &manifest)
	Append a ManifestFile to the table.
std::string	operation () override
	A string that describes the action that produced the new snapshot.
Public Member Functions inherited from iceberg::MergingSnapshotUpdate
Result< std::vector< ManifestFile > >	Apply (const TableMetadata &metadata_to_update, const std::shared_ptr< Snapshot > &snapshot) override
	Apply the update's changes to the given metadata and snapshot.
Status	CleanUncommitted (const std::unordered_set< std::string > &committed) override
	Clean up any uncommitted manifests that were created.
std::unordered_map< std::string, std::string >	Summary () override
	Get the summary map for this operation.
Public Member Functions inherited from iceberg::SnapshotUpdate
Kind	kind () const override
	Return the kind of this pending update.
bool	IsRetryable () const override
	Whether this update can be retried after a commit conflict.
auto &	DeleteWith (this auto &self, std::function< Status(const std::string &)> delete_func)
	Set a callback to delete files instead of the table's default.
auto &	StageOnly (this auto &self)
	Stage a snapshot in table metadata, but do not make it current.
auto &	ScanManifestsWith (this auto &self, Executor &executor)
	Configure an executor for manifest planning work.
auto &	ToBranch (this auto &self, const std::string &branch)
	Perform operations on a particular branch.
auto &	Set (this auto &self, const std::string &property, const std::string &value)
	Set a summary property in the snapshot produced by this update.
auto &	WriteManifestsWith (this auto &self, Executor &executor, int32_t parallelism)
	Configure an executor and max writer count for writing new manifests.
Result< ApplyResult >	Apply ()
	Apply the update's changes to create a new snapshot.
Status	Finalize (Result< const TableMetadata * > commit_result) override
	Finalize the snapshot update, cleaning up any uncommitted files.
Public Member Functions inherited from iceberg::PendingUpdate
virtual Status	Commit ()
	Apply the pending changes and commit.
	PendingUpdate (const PendingUpdate &)=delete
PendingUpdate &	operator= (const PendingUpdate &)=delete
	PendingUpdate (PendingUpdate &&) noexcept=default
PendingUpdate &	operator= (PendingUpdate &&) noexcept=default
Public Member Functions inherited from iceberg::ErrorCollector
	ErrorCollector (ErrorCollector &&)=default
ErrorCollector &	operator= (ErrorCollector &&)=default
	ErrorCollector (const ErrorCollector &)=default
ErrorCollector &	operator= (const ErrorCollector &)=default
template<typename... Args>
auto &	AddError (this auto &self, ErrorKind kind, const std::format_string< Args... > fmt, Args &&... args)
	Add a specific error and return reference to derived class.
auto &	AddError (this auto &self, Error err)
	Add an existing error object and return reference to derived class.
auto &	AddError (this auto &self, std::unexpected< Error > err)
	Add an unexpected result's error and return reference to derived class.
bool	has_errors () const
	Check if any errors have been collected.
size_t	error_count () const
	Get the number of errors collected.
Status	CheckErrors () const
	Check for accumulated errors and return them if any exist.
void	ClearErrors ()
	Clear all accumulated errors.
const std::vector< Error > &	errors () const
	Get read-only access to all collected errors.

Static Public Member Functions
static Result< std::unique_ptr< MergeAppend > >	Make (std::string table_name, std::shared_ptr< TransactionContext > ctx)
	Create a new MergeAppend instance.

Additional Inherited Members
Public Types inherited from iceberg::PendingUpdate
enum class	Kind : uint8_t {   kExpireSnapshots , kSetSnapshot , kUpdateLocation , kUpdatePartitionSpec ,   kUpdatePartitionStatistics , kUpdateProperties , kUpdateSchema , kUpdateSnapshot ,   kUpdateSnapshotReference , kUpdateSortOrder , kUpdateStatistics }
Protected Member Functions inherited from iceberg::MergingSnapshotUpdate
	MergingSnapshotUpdate (std::string table_name, std::shared_ptr< TransactionContext > ctx)
	Constructor; reads merge configuration from table properties.
Status	AddDataFile (std::shared_ptr< DataFile > file)
	Stage a data file to be added to the table.
Status	AddDeleteFile (std::shared_ptr< DataFile > file)
	Stage a delete file to be added to the table.
Status	ValidateNewDeleteFile (const TableMetadata &metadata, const DataFile &file)
	Validate a delete file against the table format version rules.
Status	AddDeleteFile (std::shared_ptr< DataFile > file, int64_t data_sequence_number)
	Stage a delete file with an explicit data sequence number.
Status	AddManifest (ManifestFile manifest)
	Add all files in a pre-existing data manifest to the new snapshot.
Status	DeleteDataFile (std::shared_ptr< DataFile > file)
	Register a data file (by object) to be deleted from the table.
Status	DeleteDeleteFile (std::shared_ptr< DataFile > file)
	Register a delete file (by object) to be removed from the table.
Status	DeleteByPath (std::string_view path)
	Register a data file path to be deleted from the table.
Status	DeleteByRowFilter (std::shared_ptr< Expression > expr)
	Register an expression to delete matching rows.
Status	DropPartition (int32_t spec_id, PartitionValues partition)
	Register a partition to be dropped.
void	FailMissingDeletePaths ()
	Fail if any registered delete path is not found in any manifest.
void	FailAnyDelete ()
	Fail if any manifest entry matches a delete condition.
void	SetNewDataFilesDataSequenceNumber (int64_t sequence_number)
	Override the data sequence number assigned to all newly-added data files.
bool	HasDataSequenceNumber () const
	Returns true if SetNewDataFilesDataSequenceNumber was called.
void	CaseSensitive (bool case_sensitive)
	Set case sensitivity for row filter and expression evaluation.
bool	IsCaseSensitive () const
	Returns true if case-sensitive matching is enabled (default: true).
bool	AddsDataFiles () const
	Returns true if any data files have been staged for addition.
bool	AddsDeleteFiles () const
	Returns true if any delete files have been staged for addition.
bool	DeletesDataFiles () const
	Returns true if any data files have been registered for deletion.
bool	DeletesDeleteFiles () const
	Returns true if any delete files have been registered for removal.
const std::shared_ptr< Expression > &	RowFilter () const
	Returns the row-filter expression set via DeleteByRowFilter, or nullptr.
Result< std::shared_ptr< PartitionSpec > >	DataSpec () const
	Returns the single partition spec for all staged data files.
std::vector< std::shared_ptr< DataFile > >	AddedDataFiles () const
	Returns all data files staged for addition.
Status	ValidateNoNewDeletesForDataFiles (const TableMetadata &metadata, std::optional< int64_t > starting_snapshot_id, const DataFileSet &replaced_files, const std::shared_ptr< Snapshot > &parent, std::shared_ptr< FileIO > io) const
	Return an error if any snapshot after starting_snapshot_id, or from the beginning if unset, added a delete file that covers a file in replaced_files.
Status	ValidateAddedDVs (const TableMetadata &metadata, std::optional< int64_t > starting_snapshot_id, std::shared_ptr< Expression > conflict_filter, const std::shared_ptr< Snapshot > &parent, std::shared_ptr< FileIO > io) const
	Return an error if a staged deletion vector conflicts with a deletion vector added since starting_snapshot_id.
Protected Member Functions inherited from iceberg::SnapshotUpdate
	SnapshotUpdate (std::shared_ptr< TransactionContext > ctx)
Result< std::vector< ManifestFile > >	WriteDataManifests (std::span< const std::shared_ptr< DataFile > > files, const std::shared_ptr< PartitionSpec > &spec, std::optional< int64_t > data_sequence_number=std::nullopt)
	Write data manifests for the given data files.
Result< std::vector< ManifestFile > >	WriteDeleteManifests (std::span< const ContentFileWithSequenceNumber > files, const std::shared_ptr< PartitionSpec > &spec)
const std::string &	target_branch () const
bool	can_inherit_snapshot_id () const
const std::string &	commit_uuid () const
int32_t	manifest_count () const
int32_t	attempt () const
int64_t	target_manifest_size_bytes () const
virtual Status	Validate (const TableMetadata &current_metadata, const std::shared_ptr< Snapshot > &snapshot)
	Validate the current metadata.
virtual bool	CleanupAfterCommit () const
	Check if cleanup should happen after commit.
int64_t	SnapshotId ()
	Get or generate the snapshot ID for the new snapshot.
Status	DeleteFile (const std::string &path)
	Delete a file at the given path.
std::string	ManifestPath ()
std::string	ManifestListPath ()
SnapshotSummaryBuilder &	summary_builder ()
SnapshotSummaryBuilder	BuildManifestCountSummary (std::span< const ManifestFile > manifests, int32_t replaced_manifests_count)
Protected Member Functions inherited from iceberg::PendingUpdate
	PendingUpdate (std::shared_ptr< TransactionContext > ctx)
const TableMetadata &	base () const
Static Protected Member Functions inherited from iceberg::MergingSnapshotUpdate
static Status	ValidateAddedDataFiles (const TableMetadata &metadata, std::optional< int64_t > starting_snapshot_id, std::shared_ptr< Expression > filter, const std::shared_ptr< Snapshot > &parent, std::shared_ptr< FileIO > io, bool case_sensitive=true)
	Return an error if any snapshot after starting_snapshot_id, or from the beginning if unset, added a data file matching the given filter expression.
static Status	ValidateAddedDataFiles (const TableMetadata &metadata, std::optional< int64_t > starting_snapshot_id, const PartitionSet &partition_set, const std::shared_ptr< Snapshot > &parent, std::shared_ptr< FileIO > io)
	Return an error if any snapshot after starting_snapshot_id, or from the beginning if unset, added a data file in any partition of the given partition set.
static Status	ValidateDataFilesExist (const TableMetadata &metadata, std::optional< int64_t > starting_snapshot_id, const std::unordered_set< std::string > &file_paths, bool skip_deletes, std::shared_ptr< Expression > filter, const std::shared_ptr< Snapshot > &parent, std::shared_ptr< FileIO > io, bool case_sensitive=true)
	Return an error if any snapshot after starting_snapshot_id, or from the beginning if unset, removed a file whose path is in file_paths (and skip_deletes is false).
static Status	ValidateNoNewDeletesForDataFiles (const TableMetadata &metadata, std::optional< int64_t > starting_snapshot_id, const DataFileSet &replaced_files, const std::shared_ptr< Snapshot > &parent, std::shared_ptr< FileIO > io, bool ignore_equality_deletes=false)
	Return an error if any snapshot after starting_snapshot_id, or from the beginning if unset, added a delete file that covers a file in replaced_files.
static Status	ValidateNoNewDeletesForDataFiles (const TableMetadata &metadata, std::optional< int64_t > starting_snapshot_id, std::shared_ptr< Expression > data_filter, const DataFileSet &replaced_files, const std::shared_ptr< Snapshot > &parent, std::shared_ptr< FileIO > io, bool case_sensitive=true)
	Return an error if any snapshot after starting_snapshot_id, or from the beginning if unset, added a delete file matching the data filter that covers a file in replaced_files.
static Status	ValidateNoNewDeleteFiles (const TableMetadata &metadata, std::optional< int64_t > starting_snapshot_id, std::shared_ptr< Expression > data_filter, const std::shared_ptr< Snapshot > &parent, std::shared_ptr< FileIO > io, bool case_sensitive=true)
	Return an error if any snapshot after starting_snapshot_id, or from the beginning if unset, added a delete file matching the given row filter.
static Status	ValidateNoNewDeleteFiles (const TableMetadata &metadata, std::optional< int64_t > starting_snapshot_id, const PartitionSet &partition_set, const std::shared_ptr< Snapshot > &parent, std::shared_ptr< FileIO > io)
	Return an error if any snapshot after starting_snapshot_id, or from the beginning if unset, added a delete file matching any partition in the given partition set.
static Status	ValidateDeletedDataFiles (const TableMetadata &metadata, std::optional< int64_t > starting_snapshot_id, std::shared_ptr< Expression > data_filter, const std::shared_ptr< Snapshot > &parent, std::shared_ptr< FileIO > io, bool case_sensitive=true)
	Return an error if any snapshot after starting_snapshot_id, or from the beginning if unset, deleted a data file matching the given row filter.
static Status	ValidateDeletedDataFiles (const TableMetadata &metadata, std::optional< int64_t > starting_snapshot_id, const PartitionSet &partition_set, const std::shared_ptr< Snapshot > &parent, std::shared_ptr< FileIO > io)
	Return an error if any snapshot after starting_snapshot_id, or from the beginning if unset, deleted a data file in any partition of the given partition set.
static Result< std::unique_ptr< DeleteFileIndex > >	AddedDeleteFiles (const TableMetadata &metadata, std::optional< int64_t > starting_snapshot_id, std::shared_ptr< Expression > data_filter, std::shared_ptr< PartitionSet > partition_set, const std::shared_ptr< Snapshot > &parent, std::shared_ptr< FileIO > io, bool case_sensitive=true)
	Build a DeleteFileIndex of delete files added since starting_snapshot_id.
static Status	ValidateAddedDVs (const TableMetadata &metadata, std::optional< int64_t > starting_snapshot_id, std::shared_ptr< Expression > conflict_filter, const std::unordered_set< std::string > &referenced_data_files, const std::shared_ptr< Snapshot > &parent, std::shared_ptr< FileIO > io, bool case_sensitive=true)
	Return an error if any snapshot after starting_snapshot_id, or from the beginning if unset, added a deletion vector that conflicts with DVs being written.
Protected Attributes inherited from iceberg::SnapshotUpdate
SnapshotSummaryBuilder	summary_
Protected Attributes inherited from iceberg::PendingUpdate
std::shared_ptr< TransactionContext >	ctx_
Protected Attributes inherited from iceberg::ErrorCollector
std::vector< Error >	errors_

Detailed Description

API for appending new files in a table while merging manifests.

This API accumulates file additions, produces a new Snapshot of the table, and commits that snapshot as current. When committing, these changes are applied to the latest table snapshot. Commit conflicts are resolved by applying the changes to the new latest snapshot and reattempting the commit.

MergeAppend uses the shared MergingSnapshotUpdate pipeline, so it can merge newly written and existing manifests according to table properties.

Member Function Documentation

AppendFile()

MergeAppend & iceberg::MergeAppend::AppendFile

(

const std::shared_ptr< DataFile > &

file

)

Append a DataFile to the table.

Parameters

file	A data file.

Returns

This MergeAppend for method chaining.

AppendManifest()

MergeAppend & iceberg::MergeAppend::AppendManifest

(

const ManifestFile &

manifest

)

Append a ManifestFile to the table.

The manifest must contain only appended files. All files in the manifest are appended to the table in the snapshot created by this update. Snapshot ID and sequence number assignment happen during commit.

Parameters

manifest

A manifest file of files to append.

Returns

This MergeAppend for method chaining.

Make()

Result< std::unique_ptr< MergeAppend > > iceberg::MergeAppend::Make ( std::string  table_name, std::shared_ptr< TransactionContext >  ctx  )

static

Create a new MergeAppend instance.

Parameters

table_name	The name of the table
ctx	The transaction context to use for this update

Returns

A Result containing the MergeAppend instance or an error

operation()

std::string iceberg::MergeAppend::operation ( )

overridevirtual

A string that describes the action that produced the new snapshot.

Returns

A string operation name

Implements iceberg::SnapshotUpdate.

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The documentation for this class was generated from the following files:

• iceberg/update/merge_append.h
• iceberg/update/merge_append.cc