table

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 Go to latest Published: Jul 21, 2026 License: Apache-2.0 Imports: 60 Imported by: 0

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Index

Constants

View Source 
const (
	ScanOptionArrowUseLargeTypes = "arrow.use_large_types"
	ScanOptionRowLineageEnabled  = "row_lineage.enabled"
)
View Source 
const (
	ArrowFieldDocKey = "doc"
	// Arrow schemas that are generated from the Parquet library will utilize
	// this key to identify the field id of the source Parquet field.
	// We use this when converting to Iceberg to provide field IDs
	ArrowParquetFieldIDKey = "PARQUET:field_id"
)

constants to look for as Keys in Arrow field metadata

View Source 
const (
	// WriteDeleteIsolationLevelKey controls isolation for DeleteFiles
	// and RowDelta eq-delete commits. Default: serializable (matches
	// Java trunk). Older Java releases and some pyiceberg codepaths
	// used "snapshot"; set this property explicitly to snapshot if
	// you are migrating from a pipeline that relied on that behavior.
	WriteDeleteIsolationLevelKey     = "write.delete.isolation-level"
	WriteDeleteIsolationLevelDefault = IsolationSerializable

	// WriteUpdateIsolationLevelKey controls isolation for overwrite /
	// merge commits. Default: serializable (matches Java trunk).
	// Older Java releases and some pyiceberg codepaths used
	// "snapshot"; set this property explicitly to snapshot if you are
	// migrating from a pipeline that relied on that behavior.
	// write.merge.isolation-level is not modeled separately here yet;
	// merge-style producers continue to use write.update.isolation-level.
	WriteUpdateIsolationLevelKey     = "write.update.isolation-level"
	WriteUpdateIsolationLevelDefault = IsolationSerializable
)

Property keys for configuring isolation per write operation. Names match the Java TableProperties constants so configs can be ported directly between engines.

View Source 
const (
	WriteDataPathKey                        = "write.data.path"
	WriteMetadataPathKey                    = "write.metadata.path"
	WriteMetadataLocationKey                = "write.metadata.location"
	WriteObjectStorePartitionedPathsKey     = "write.object-storage.partitioned-paths"
	WriteObjectStorePartitionedPathsDefault = true
	ObjectStoreEnabledKey                   = "write.object-storage.enabled"
	ObjectStoreEnabledDefault               = false

	DefaultNameMappingKey = "schema.name-mapping.default"

	MetricsModeColumnConfPrefix    = "write.metadata.metrics.column"
	DefaultWriteMetricsModeKey     = "write.metadata.metrics.default"
	DefaultWriteMetricsModeDefault = "truncate(16)"

	ParquetRowGroupSizeBytesKey              = internal.ParquetRowGroupSizeBytesKey
	ParquetRowGroupSizeBytesDefault          = internal.ParquetRowGroupSizeBytesDefault
	ParquetRowGroupLimitKey                  = internal.ParquetRowGroupLimitKey
	ParquetRowGroupLimitDefault              = internal.ParquetRowGroupLimitDefault
	ParquetPageSizeBytesKey                  = internal.ParquetPageSizeBytesKey
	ParquetPageSizeBytesDefault              = internal.ParquetPageSizeBytesDefault
	ParquetPageRowLimitKey                   = internal.ParquetPageRowLimitKey
	ParquetPageRowLimitDefault               = internal.ParquetPageRowLimitDefault
	ParquetDictSizeBytesKey                  = internal.ParquetDictSizeBytesKey
	ParquetDictSizeBytesDefault              = internal.ParquetDictSizeBytesDefault
	ParquetPageVersionKey                    = internal.ParquetPageVersionKey
	ParquetPageVersionDefault                = internal.ParquetPageVersionDefault
	ParquetCompressionKey                    = internal.ParquetCompressionKey
	ParquetCompressionDefault                = internal.ParquetCompressionDefault
	ParquetCompressionLevelKey               = internal.ParquetCompressionLevelKey
	ParquetCompressionLevelDefault           = internal.ParquetCompressionLevelDefault
	ParquetBloomFilterMaxBytesKey            = internal.ParquetBloomFilterMaxBytesKey
	ParquetBloomFilterMaxBytesDefault        = internal.ParquetBloomFilterMaxBytesDefault
	ParquetBloomFilterColumnEnabledKeyPrefix = internal.ParquetBloomFilterColumnEnabledKeyPrefix

	ParquetBatchSizeKey     = internal.ParquetBatchSizeKey
	ParquetBatchSizeDefault = internal.ParquetBatchSizeDefault

	ManifestMergeEnabledKey     = "commit.manifest-merge.enabled"
	ManifestMergeEnabledDefault = false

	ManifestTargetSizeBytesKey     = "commit.manifest.target-size-bytes"
	ManifestTargetSizeBytesDefault = 8 * 1024 * 1024 // 8 MB

	ManifestMinMergeCountKey     = "commit.manifest.min-count-to-merge"
	ManifestMinMergeCountDefault = 100

	ManifestMergeMaxConcurrencyKey     = "commit.manifest-merge.max-concurrency"
	ManifestMergeMaxConcurrencyDefault = 0

	WritePartitionSummaryLimitKey     = "write.summary.partition-limit"
	WritePartitionSummaryLimitDefault = 0

	WriteDeleteModeKey     = "write.delete.mode"
	WriteDeleteModeDefault = WriteModeCopyOnWrite

	MetadataDeleteAfterCommitEnabledKey     = "write.metadata.delete-after-commit.enabled"
	MetadataDeleteAfterCommitEnabledDefault = false

	MetadataPreviousVersionsMaxKey     = "write.metadata.previous-versions-max"
	MetadataPreviousVersionsMaxDefault = 100

	MetadataCompressionKey     = "write.metadata.compression-codec"
	MetadataCompressionDefault = "none"

	WriteFormatDefaultKey     = "write.format.default"
	WriteFormatDefaultDefault = "parquet"

	WriteTargetFileSizeBytesKey     = "write.target-file-size-bytes"
	WriteTargetFileSizeBytesDefault = 512 * 1024 * 1024 // 512 MB

	ParquetShredVariantsKey         = internal.ParquetShredVariantsKey
	ParquetShredVariantsDefault     = internal.ParquetShredVariantsDefault
	ParquetVariantBufferSizeKey     = internal.ParquetVariantBufferSizeKey
	ParquetVariantBufferSizeDefault = internal.ParquetVariantBufferSizeDefault

	MinSnapshotsToKeepKey     = "min-snapshots-to-keep"
	MinSnapshotsToKeepDefault = math.MaxInt

	MaxSnapshotAgeMsKey     = "max-snapshot-age-ms"
	MaxSnapshotAgeMsDefault = int64(math.MaxInt64)

	MaxRefAgeMsKey     = "max-ref-age-ms"
	MaxRefAgeMsDefault = int64(math.MaxInt64)

	// CommitNumRetriesKey is the number of commit retry attempts before
	// giving up on ErrCommitFailed from the catalog.
	//
	// The default is 0 (no retries) until refresh-and-replay lands; a
	// retry loop that reuses the original updates/requirements will
	// fail deterministically on genuine OCC conflicts and only slow
	// down the final error. Callers that observe transient catalog
	// flakiness (dropped connections, brief 409 during leader
	// election) can raise this to recover.
	CommitNumRetriesKey     = "commit.retry.num-retries"
	CommitNumRetriesDefault = 0

	// CommitMinRetryWaitMsKey is the initial wait time in milliseconds
	// for exponential backoff between commit retry attempts. Default: 100ms.
	CommitMinRetryWaitMsKey     = "commit.retry.min-wait-ms"
	CommitMinRetryWaitMsDefault = 100

	// CommitMaxRetryWaitMsKey is the maximum wait time in milliseconds
	// between commit retry attempts. Default: 60s.
	CommitMaxRetryWaitMsKey     = "commit.retry.max-wait-ms"
	CommitMaxRetryWaitMsDefault = 60 * 1000

	// CommitTotalRetryTimeoutMsKey bounds the total time spent across all
	// retry attempts. Default: 30 minutes.
	CommitTotalRetryTimeoutMsKey     = "commit.retry.total-timeout-ms"
	CommitTotalRetryTimeoutMsDefault = 30 * 60 * 1000
)
View Source 
const (
	PropertyFormatVersion            = "format-version"
	PropertyUuid                     = "uuid"
	PropertySnapshotCount            = "snapshot-count"
	PropertyCurrentSnapshotId        = "current-snapshot-id"
	PropertyCurrentSnapshotSummary   = "current-snapshot-summary"
	PropertyCurrentSnapshotTimestamp = "current-snapshot-timestamp"
	PropertyCurrentSchema            = "current-schema"
	PropertyDefaultPartitionSpec     = "default-partition-spec"
	PropertyDefaultSortOrder         = "default-sort-order"
)

Reserved properties

View Source 
const (
	MetadataCompressionCodecNone = "none"
	MetadataCompressionCodecGzip = "gzip"
	MetadataCompressionCodecZstd = "zstd"
)

Metadata compression codecs

View Source 
const (
	WriteModeCopyOnWrite = "copy-on-write"
	WriteModeMergeOnRead = "merge-on-read"
)

Write modes

View Source 
const (
	InitialSortOrderID  = 1
	UnsortedSortOrderID = 0
)
View Source 
const (
	UpdateAddSpec      = "add-spec"
	UpdateAddSchema    = "add-schema"
	UpdateAddSnapshot  = "add-snapshot"
	UpdateAddSortOrder = "add-sort-order"

	UpdateAssignUUID = "assign-uuid"

	UpdateAddEncryptionKey          = "add-encryption-key"
	UpdateRemoveEncryptionKey       = "remove-encryption-key"
	UpdateRemovePartitionStatistics = "remove-partition-statistics"
	UpdateRemoveProperties          = "remove-properties"
	UpdateRemoveSchemas             = "remove-schemas"
	UpdateRemoveSnapshots           = "remove-snapshots"
	UpdateRemoveSnapshotRef         = "remove-snapshot-ref"
	UpdateRemoveSpec                = "remove-partition-specs"
	UpdateRemoveStatistics          = "remove-statistics"

	UpdateSetCurrentSchema       = "set-current-schema"
	UpdateSetDefaultSortOrder    = "set-default-sort-order"
	UpdateSetDefaultSpec         = "set-default-spec"
	UpdateSetLocation            = "set-location"
	UpdateSetPartitionStatistics = "set-partition-statistics"
	UpdateSetProperties          = "set-properties"
	UpdateSetSnapshotRef         = "set-snapshot-ref"
	UpdateSetStatistics          = "set-statistics"

	UpdateUpgradeFormatVersion = "upgrade-format-version"
)

These are the various update actions defined in the iceberg spec

View Source 
const DefaultFormatVersion = 2
View Source 
const MainBranch = "main"
View Source 
const ScanNoLimit = -1
View Source 
const TableRootID = -1

Variables

View Source 
var (
	// ErrConflictingDataFiles is returned when a concurrent commit
	// added data files that satisfy the committer's filter.
	ErrConflictingDataFiles = fmt.Errorf("%w: concurrent data files added", ErrCommitFailed)

	// ErrConflictingDeleteFiles is returned when a concurrent commit
	// added delete files that could mask rows the committer is
	// writing or replacing.
	ErrConflictingDeleteFiles = fmt.Errorf("%w: concurrent delete files added", ErrCommitFailed)

	// ErrDataFilesMissing is returned when a concurrent commit deleted
	// data files the committer explicitly references (e.g. a position
	// delete pointing at a file that is no longer reachable).
	ErrDataFilesMissing = fmt.Errorf("%w: referenced data files missing", ErrCommitFailed)
)

Retryable conflict sentinels. All wrap ErrCommitFailed so the retry loop in doCommit treats them as retryable. Callers that need to distinguish which kind of conflict occurred can match on the specific sentinel via errors.Is.

View Source 
var (
	ErrInvalidMetadataFormatVersion = errors.New("invalid or missing format-version in table metadata")
	ErrInvalidMetadata              = errors.New("invalid metadata")
	ErrPartitionSpecNotFound        = errors.New("partition spec not found")
)
View Source 
var (
	ErrInvalidOperation  = errors.New("invalid operation value")
	ErrMissingOperation  = errors.New("missing operation key")
	ErrInvalidRowLineage = errors.New("invalid row lineage")
)
View Source 
var (
	ErrInvalidSortOrderID   = errors.New("invalid sort order ID")
	ErrInvalidSortSourceID  = errors.New("invalid sort source ID")
	ErrInvalidTransform     = errors.New("invalid transform, must be a valid transform string or a transform object")
	ErrInvalidSortDirection = errors.New("invalid sort direction, must be 'asc' or 'desc'")
	ErrInvalidNullOrder     = errors.New("invalid null order, must be 'nulls-first' or 'nulls-last'")
)
View Source 
var ErrCommitDiverged = errors.New("commit diverged: base snapshot is no longer on the branch")

ErrCommitDiverged is returned when the committer's base snapshot is no longer on the branch, so conflict validation cannot enumerate concurrent snapshots. The committer must refresh and rebuild their commit from the new base — naive retry would fail identically.

Unlike the other conflict sentinels in this file, ErrCommitDiverged does NOT wrap ErrCommitFailed: it is terminal for the current attempt. This mirrors Java's ValidationException, which the SnapshotProducer retry machinery does not catch.

View Source 
var ErrCommitFailed = errors.New("commit failed, refresh and try again")

ErrCommitFailed is the sentinel error returned by catalogs when a commit fails due to a concurrent modification (e.g. HTTP 409 Conflict from the REST catalog). Catalog implementations should wrap this error so that callers using errors.Is(err, table.ErrCommitFailed) can detect retryable commit conflicts.

Currently only catalog/rest wraps this sentinel; Glue, SQL, and Hive catalogs return their conflict errors raw and will not trigger retries until follow-up work wires them through (tracked under issue #830).

View Source 
var ErrEmptyEqualityFieldIDs = errors.New("equality field IDs must not be empty")
View Source 
var ErrInvalidIsolationLevel = errors.New("invalid isolation level")

ErrInvalidIsolationLevel is returned when a configured isolation level value is invalid. It is terminal for the current commit attempt and does not wrap ErrCommitFailed, so config errors are not retried as conflicts.

View Source 
var ErrInvalidRefType = errors.New("invalid snapshot ref type, should be 'branch' or 'tag'")
View Source 
var ErrInvalidRequirement = errors.New("invalid requirement")
View Source 
var ErrSnapshotNotFound = errors.New("snapshot not found")

ErrSnapshotNotFound is returned (wrapped) by metadata lookups when a snapshot ID does not exist in the table's snapshot list. Tests pin meaning via errors.Is(err, ErrSnapshotNotFound).

View Source 
var ErrWriteIORequired = fmt.Errorf("%w: file system does not implement WriteFileIO", iceberg.ErrNotImplemented)

ErrWriteIORequired is returned by write paths when the table's file system does not implement io.WriteFileIO. Commit retries also fail fast on this condition because manifest-list rebuilds need write access; skipping that rebuild can reintroduce stale-parent data loss. Callers should use errors.Is(err, ErrWriteIORequired) to detect the precise condition, or errors.Is(err, iceberg.ErrNotImplemented) for compatibility with older WriteRecords behavior.

View Source 
var ErrWriterClosed = errors.New("writer is closed")

ErrWriterClosed is returned when records are added to a writer after its streaming goroutine has already stopped.

View Source 
var PositionalDeleteArrowSchema, _ = SchemaToArrowSchema(iceberg.PositionalDeleteSchema, nil, true, false)
View Source 
var ReservedProperties = [9]string{
	PropertyFormatVersion,
	PropertyUuid,
	PropertySnapshotCount,
	PropertyCurrentSnapshotId,
	PropertyCurrentSnapshotSummary,
	PropertyCurrentSnapshotTimestamp,
	PropertyCurrentSchema,
	PropertyDefaultPartitionSpec,
	PropertyDefaultSortOrder,
}
View Source 
var UnsortedSortOrder = SortOrder{/* contains filtered or unexported fields */}

A default Sort Order indicating no sort order at all

Functions

func ArrowSchemaToIceberg 

func ArrowSchemaToIceberg(sc *arrow.Schema, downcastNsTimestamp bool, nameMapping iceberg.NameMapping) (*iceberg.Schema, error)

func ArrowSchemaToIcebergWithFreshIDs 

func ArrowSchemaToIcebergWithFreshIDs(sc *arrow.Schema, downcastNsTimestamp bool) (*iceberg.Schema, error)

func ArrowTypeToIceberg 

func ArrowTypeToIceberg(dt arrow.DataType, downcastNsTimestamp bool) (iceberg.Type, error)

func CollectSafeDeletionVectors 

func CollectSafeDeletionVectors(tasks []FileScanTask) []iceberg.DataFile

CollectSafeDeletionVectors returns the tasks' deletion vectors, deduplicated by referenced data file.

Scan planning attaches to a task only the DV referencing its own data file, so every returned DV references a file in the rewrite set. A hand-built FileScanTask carrying a DV for some other live data file would have that DV expunged here — populate DeletionVectorFiles only from scan planning.

func CollectSafePositionDeletes 

func CollectSafePositionDeletes(tasks []FileScanTask) []iceberg.DataFile

CollectSafePositionDeletes returns position delete files from the given tasks that are safe to remove during compaction.

A position delete file is safe to remove when it was matched to a data file (via scan planning) and that data file is being rewritten in this compaction group. Since ReadTasks applies the deletes during reading, the new output files will not contain the deleted rows.

Only position deletes (EntryContentPosDeletes) are considered. Equality deletes are decided by [compaction.DecideDeadEqualityDeletes] (which needs partition-wide visibility, not just the task scope). Deletion vectors will be handled when DV read support lands.

Caller contract: every data file referenced by a returned pos-delete must be in the caller's rewrite set across the entire commit. This function only sees one group's tasks, but a pos-delete file can reference data files across multiple groups (the planner bin-packs within a partition via [compaction.Config.PlanCompaction] and skips files via MinInputFiles). If a pos-delete is reported safe by one group but references a still-live data file in another group — or a file the planner skipped — committing only this group's rewrite would orphan the still-live data file's deletes. Coordinators that aggregate multiple groups into one rewrite snapshot are responsible for re-checking against the full set of rewritten paths, or for moving this computation leader-side once worker outputs have aggregated.

ExecuteCompactionGroup calls this internally to populate CompactionGroupResult.SafePosDeletes. It is kept exported for custom workers that want the spec-shaped predicate without taking the rest of ExecuteCompactionGroup's read+write pipeline.

func DataFileFromMetadata 

func DataFileFromMetadata(args DataFileArgs) (iceberg.DataFile, error)

DataFileFromMetadata builds a fully populated iceberg.DataFile from a file's in-memory, format-specific metadata object, extracting per-column statistics (column_sizes, value_counts, null_value_counts, lower_bounds, upper_bounds), split offsets, and the manifest-entry shape required for the requested content type. The format-specific extraction is dispatched through the internal FileFormat interface; no filesystem reads are performed.

The returned DataFile is intended to be handed to Transaction.AddDataFiles (data files) or Transaction.NewRowDelta (delete files); it is NOT committed automatically. The file bytes described by args.Metadata must already have been uploaded to args.FilePath.

Scope and limitations:

  • Only Parquet is supported today (args.Format must be iceberg.ParquetFile and args.Metadata a *metadata.FileMetaData).
  • All three manifest-entry contents are supported end to end: data, equality deletes, and positional deletes.
  • Row lineage is supported: a data file's first_row_id can be set via DataFileArgs.FirstRowID for format-version-3+ tables.
  • Iceberg v3 deletion vectors (Puffin DVs) are not supported in this helper function; it emits only Parquet position-delete files. A file-scoped position delete may still record its target via DataFileArgs.ReferencedDataFile; partition-scoped deletes leave it nil, in which case engines may infer scoping from the file_path column bounds.

func GetPartitionRecord 

func GetPartitionRecord(dataFile iceberg.DataFile, partitionType *iceberg.StructType) iceberg.StructLike

GetPartitionRecord converts a DataFile's partition map into a positional record ordered by the fields of the given partition struct type.

func HistorySchema 

func HistorySchema() *iceberg.Schema

HistorySchema returns the Iceberg schema of the history metadata table. The field IDs are fixed by the Iceberg metadata-tables spec and match the Java, PyIceberg, and Rust clients for cross-client parity. A fresh schema value is returned on each call; callers must not mutate it or rely on pointer identity.

func IsAncestorOf 

func IsAncestorOf(snapshotID, ancestorID int64, lookup SnapshotLookup) bool

IsAncestorOf returns true if ancestorID is in the parent chain of snapshotID (or equal to snapshotID, provided snapshotID resolves).

Returns false if snapshotID cannot be resolved, if ancestorID is not reachable from snapshotID via ParentSnapshotID, or if a cycle prevents reaching ancestorID.

Note: every snapshot on the walked chain must be resolvable via lookup. This diverges from Java's SnapshotUtil.isAncestorOf which walks parent *ids* regardless of snapshot resolvability. The Go semantics are stricter (conservative) — broken chains return false rather than matching an unreachable ancestor id.

func IsDeletionVector 

func IsDeletionVector(df iceberg.DataFile) bool

IsDeletionVector reports whether df is a deletion vector: a Puffin file with position-delete content. The content-type guard matters because df is an arbitrary DataFile, so a non-pos-delete Puffin from an external writer must not be misclassified. Keying on format rather than referenced_data_file avoids misclassifying a Parquet pos-delete that legally sets it.

func NewAddEncryptionKeyUpdate 

func NewAddEncryptionKeyUpdate(key EncryptionKey) *addEncryptionKeyUpdate

NewAddEncryptionKeyUpdate creates a new Update that adds or replaces an encryption key (indexed by its key-id) in the table metadata.

func NewAddPartitionSpecUpdate 

func NewAddPartitionSpecUpdate(spec *iceberg.PartitionSpec, initial bool) *addPartitionSpecUpdate

NewAddPartitionSpecUpdate creates a new update that adds the given partition spec to the table metadata. If the initial flag is set to true, the spec is considered the initial spec of the table, and all other previously added specs in the metadata builder are removed.

func NewAddSchemaUpdate 

func NewAddSchemaUpdate(schema *iceberg.Schema) *addSchemaUpdate

NewAddSchemaUpdate creates a new update that adds the given schema and updates the lastColumnID based on the schema.

func NewAddSnapshotUpdate 

func NewAddSnapshotUpdate(snapshot *Snapshot) *addSnapshotUpdate

NewAddSnapshotUpdate creates a new update that adds the given snapshot to the table metadata.

func NewAddSortOrderUpdate 

func NewAddSortOrderUpdate(sortOrder *SortOrder) *addSortOrderUpdate

NewAddSortOrderUpdate creates a new update that adds the given sort order to the table metadata. If the initial flag is set to true, the sort order is considered the initial sort order of the table, and all previously added sort orders in the metadata builder are removed.

func NewAssignUUIDUpdate 

func NewAssignUUIDUpdate(uuid uuid.UUID) *assignUUIDUpdate

NewAssignUUIDUpdate creates a new update to assign a UUID to the table metadata.

func NewRemoveEncryptionKeyUpdate 

func NewRemoveEncryptionKeyUpdate(keyID string) *removeEncryptionKeyUpdate

NewRemoveEncryptionKeyUpdate creates a new Update that removes the encryption key with the given key-id from the table metadata.

func NewRemovePartitionStatisticsUpdate 

func NewRemovePartitionStatisticsUpdate(snapshotID int64) *removePartitionStatisticsUpdate

NewRemovePartitionStatisticsUpdate creates a new Update that removes the partition statistics file for the given snapshot ID from the table metadata.

func NewRemovePropertiesUpdate 

func NewRemovePropertiesUpdate(removals []string) *removePropertiesUpdate

NewRemovePropertiesUpdate creates a new update that removes properties from the table metadata. The properties are identified by their names, and if a property with the given name does not exist, it is ignored.

func NewRemoveSchemasUpdate 

func NewRemoveSchemasUpdate(schemaIds []int) *removeSchemasUpdate

NewRemoveSchemasUpdate creates a new Update that removes a list of schemas from the table metadata.

func NewRemoveSnapshotRefUpdate 

func NewRemoveSnapshotRefUpdate(ref string) *removeSnapshotRefUpdate

NewRemoveSnapshotRefUpdate creates a new update that removes a snapshot reference from the table metadata.

func NewRemoveSnapshotsUpdate 

func NewRemoveSnapshotsUpdate(ids []int64, postCommit bool) *removeSnapshotsUpdate

NewRemoveSnapshotsUpdate creates a new update that removes all snapshots from the table metadata with the given snapshot IDs.

func NewRemoveSpecUpdate 

func NewRemoveSpecUpdate(specIds []int) *removeSpecUpdate

NewRemoveSpecUpdate creates a new Update that removes a list of partition specs from the table metadata.

func NewRemoveStatisticsUpdate 

func NewRemoveStatisticsUpdate(snapshotID int64) *removeStatisticsUpdate

NewRemoveStatisticsUpdate creates a new Update that removes the statistics file for the given snapshot ID from the table metadata.

func NewSetCurrentSchemaUpdate 

func NewSetCurrentSchemaUpdate(id int) *setCurrentSchemaUpdate

NewSetCurrentSchemaUpdate creates a new update that sets the current schema of the table metadata to the given schema ID.

func NewSetDefaultSortOrderUpdate 

func NewSetDefaultSortOrderUpdate(id int) *setDefaultSortOrderUpdate

NewSetDefaultSortOrderUpdate creates a new update that sets the default sort order of the table metadata to the given sort order ID.

func NewSetDefaultSpecUpdate 

func NewSetDefaultSpecUpdate(id int) *setDefaultSpecUpdate

NewSetDefaultSpecUpdate creates a new update that sets the default partition spec of the table metadata to the given spec ID.

func NewSetPartitionStatisticsUpdate 

func NewSetPartitionStatisticsUpdate(stats PartitionStatisticsFile) *setPartitionStatisticsUpdate

NewSetPartitionStatisticsUpdate creates a new Update that adds or replaces the partition statistics file for the given snapshot ID in the table metadata.

func NewSetPropertiesUpdate 

func NewSetPropertiesUpdate(updates iceberg.Properties) *setPropertiesUpdate

NewSetPropertiesUpdate creates a new update that sets the given properties in the table metadata.

func NewSetSnapshotRefUpdate 

func NewSetSnapshotRefUpdate(
	name string,
	snapshotID int64,
	refType RefType,
	maxRefAgeMs, maxSnapshotAgeMs int64,
	minSnapshotsToKeep int,
) *setSnapshotRefUpdate

NewSetSnapshotRefUpdate creates a new update that sets the given snapshot reference as the current snapshot of the table metadata. MaxRefAgeMs, MaxSnapshotAgeMs, and MinSnapshotsToKeep are optional, and any non-positive values are ignored.

func NewSetStatisticsUpdate 

func NewSetStatisticsUpdate(stats StatisticsFile) *setStatisticsUpdate

NewSetStatisticsUpdate creates a new Update that adds or replaces the statistics file for the given snapshot ID in the table metadata.

func NewUpgradeFormatVersionUpdate 

func NewUpgradeFormatVersionUpdate(formatVersion int) *upgradeFormatVersionUpdate

NewUpgradeFormatVersionUpdate creates a new update that upgrades the format version of the table metadata to the given formatVersion.

func SchemaToArrowSchema 

func SchemaToArrowSchema(sc *iceberg.Schema, metadata map[string]string, includeFieldIDs, useLargeTypes bool) (*arrow.Schema, error)

SchemaToArrowSchema converts an Iceberg schema to an Arrow schema. If the metadata parameter is non-nil, it will be included as the top-level metadata in the schema. If includeFieldIDs is true, then each field of the schema will contain a metadata key PARQUET:field_id set to the field id from the iceberg schema.

func SnapshotsSchema 

func SnapshotsSchema() *iceberg.Schema

SnapshotsSchema returns the Iceberg schema of the snapshots metadata table. The field IDs are fixed by the Iceberg metadata-tables spec and match the Java, PyIceberg, and Rust clients for cross-client parity. A fresh schema value is returned on each call; callers must not mutate it or rely on pointer identity.

The summary map's values are optional, matching PyIceberg and Rust. Java declares them required; the choice is not observable in practice because snapshot-summary values are always non-null strings.

func ToRequestedSchema 

func ToRequestedSchema(ctx context.Context, requested, fileSchema *iceberg.Schema, batch arrow.RecordBatch, opts SchemaOptions) (arrow.RecordBatch, error)

ToRequestedSchema will construct a new record batch matching the requested iceberg schema casting columns if necessary as appropriate.

func TypeToArrowType 

func TypeToArrowType(t iceberg.Type, includeFieldIDs bool, useLargeTypes bool) (arrow.DataType, error)

TypeToArrowType converts a given iceberg type, into the equivalent Arrow data type. For dealing with nested fields (List, Struct, Map) if includeFieldIDs is true, then the child fields will contain a metadata key PARQUET:field_id set to the field id.

func VisitArrowSchema 

func VisitArrowSchema[T any](sc *arrow.Schema, visitor ArrowSchemaVisitor[T]) (res T, err error)

func WithMaxRefAgeMs 

func WithMaxRefAgeMs(maxRefAgeMs int64) setSnapshotRefOption

func WithMaxSnapshotAgeMs 

func WithMaxSnapshotAgeMs(maxSnapshotAgeMs int64) setSnapshotRefOption

func WithMinSnapshotsToKeep 

func WithMinSnapshotsToKeep(minSnapshotsToKeep int) setSnapshotRefOption

func WriteRecords 

func WriteRecords(ctx context.Context, tbl *Table,
	schema *arrow.Schema,
	records iter.Seq2[arrow.RecordBatch, error],
	opts ...WriteRecordOption,
) iter.Seq2[iceberg.DataFile, error]

WriteRecords writes Arrow record batches to Parquet data files for the given table, returning an iterator of the resulting DataFile objects.

The provided Arrow schema must be compatible with the table's current Iceberg schema: each field in the Arrow schema is matched to the table schema by field ID (or by name via the table's name mapping if field IDs are absent). The Arrow schema may be a subset of the table schema (projection), but every field present must have a type that is promotable to the corresponding table field type. When the table uses microsecond timestamps, Arrow nanosecond timestamps are also accepted and are downcast during the write path.

WriteRecords releases each RecordBatch it consumes. If the caller needs a batch to remain valid after it has been yielded, it must call Retain before yielding and is then responsible for the corresponding Release.

Types

type AddFilesOption 

type AddFilesOption func(addFilesOp *addFilesOperation)

func WithAddFilesConcurrency 

func WithAddFilesConcurrency(concurrency int) AddFilesOption

WithAddFilesConcurrency overwrites the default concurrency for add files operation. Default: runtime.GOMAXPROCS(0)

type ArrowSchemaVisitor 

type ArrowSchemaVisitor[T any] interface {
	Schema(*arrow.Schema, T) T
	Struct(*arrow.StructType, []T) T
	Field(arrow.Field, T) T
	List(arrow.ListLikeType, T) T
	Map(mt *arrow.MapType, keyResult T, valueResult T) T
	Primitive(arrow.DataType) T
}

ArrowSchemaVisitor is an interface that can be implemented and used to call VisitArrowSchema for iterating

type BlobMetadata 

type BlobMetadata struct {
	Type           BlobType          `json:"type"`
	SnapshotID     int64             `json:"snapshot-id"`
	SequenceNumber int64             `json:"sequence-number"`
	Fields         []int32           `json:"fields"`
	Properties     map[string]string `json:"properties"`
}

BlobMetadata is the metadata of a statistics or indices blob.

type BlobType 

type BlobType string

BlobType is the type of blob in a Puffin file 

const (
	BlobTypeApacheDatasketchesThetaV1 BlobType = "apache-datasketches-theta-v1"
	BlobTypeDeletionVectorV1          BlobType = "deletion-vector-v1"
)

func (*BlobType) IsValid 

func (bt *BlobType) IsValid() bool

func (*BlobType) UnmarshalJSON 

func (bt *BlobType) UnmarshalJSON(data []byte) error

type CatalogIO 

type CatalogIO interface {
	LoadTable(context.Context, Identifier) (*Table, error)
	CommitTable(context.Context, Identifier, []Requirement, []Update) (Metadata, string, error)
}

type ColumnUpdate 

type ColumnUpdate struct {
	Name         iceberg.Optional[string]
	FieldType    iceberg.Optional[iceberg.Type]
	Required     iceberg.Optional[bool]
	WriteDefault iceberg.Optional[iceberg.Literal]
	Doc          iceberg.Optional[string]
}

type CompactionGroupOption 

type CompactionGroupOption func(*compactionGroupConfig)

CompactionGroupOption configures a single ExecuteCompactionGroup call. Use the With* helpers to construct values.

func WithCompactionScanConcurrency 

func WithCompactionScanConcurrency(n int) CompactionGroupOption

WithCompactionScanConcurrency sets the scan concurrency used when reading the group's tasks. Forwarded to Table.Scan as WithMaxConcurrency. Zero (the default) means runtime.GOMAXPROCS.

func WithCompactionTargetFileSize 

func WithCompactionTargetFileSize(size int64) CompactionGroupOption

WithCompactionTargetFileSize sets the size target for output files written by ExecuteCompactionGroup. Forwarded to WriteRecords as WithTargetFileSize. A non-positive value (including the zero default) means inherit the table's `write.target-file-size-bytes` property.

type CompactionGroupResult 

type CompactionGroupResult struct {
	// PartitionKey mirrors [CompactionTaskGroup.PartitionKey] for
	// display/logging on the coordinator.
	PartitionKey string

	// OldDataFiles are the data files this group replaces.
	OldDataFiles []iceberg.DataFile

	// NewDataFiles are the consolidated outputs the worker wrote.
	NewDataFiles []iceberg.DataFile

	// SafePosDeletes are position-delete files referenced by tasks in
	// this group whose target data file is being rewritten, computed
	// via [CollectSafePositionDeletes]. They are safe to expunge in
	// the rewrite snapshot.
	SafePosDeletes []iceberg.DataFile

	// SafeDeletionVectors are deletion vectors attached to tasks in this
	// group, computed via [CollectSafeDeletionVectors]. Each is bound to
	// a data file being rewritten, so all are safe to expunge.
	SafeDeletionVectors []iceberg.DataFile

	// BytesBefore is [CompactionTaskGroup.TotalSizeBytes] passed
	// through, recorded so the coordinator can roll up metrics
	// without re-reading the plan.
	BytesBefore int64

	// BytesAfter is the sum of [iceberg.DataFile.FileSizeBytes] across
	// NewDataFiles.
	BytesAfter int64
}

CompactionGroupResult is the per-group output of a compaction worker: the new files written, the old files being replaced, and the position delete files safe to expunge in the rewrite snapshot.

A distributed coordinator aggregates results from N workers and applies them to a RewriteFiles builder via RewriteFiles.ApplyResult to commit a single atomic snapshot. Each field is plain data ([]iceberg.DataFile values plus scalars) — callers serialize the contained DataFiles across process boundaries themselves; the typical pattern is to have the worker write a manifest containing the new files and ship the manifest path to the coordinator, which re-reads it.

func ExecuteCompactionGroup 

func ExecuteCompactionGroup(ctx context.Context, tbl *Table, group CompactionTaskGroup, opts ...CompactionGroupOption) (CompactionGroupResult, error)

ExecuteCompactionGroup reads a compaction group's tasks (with deletes applied), writes consolidated output files via WriteRecords, and computes the position-delete files safe to expunge in the rewrite snapshot. It does not commit — the caller hands the result to a coordinator that uses Transaction.NewRewrite + RewriteFiles.ApplyResult + RewriteFiles.Commit to stage the atomic commit.

Empty groups return a zero CompactionGroupResult without doing any I/O.

In-process callers should prefer Transaction.RewriteDataFiles, which drives this and the commit step in one call.

Tunables are exposed via CompactionGroupOption. The clustered write path is always used (a compaction group is single-partition by construction so its read stream is trivially clustered).

type CompactionTaskGroup 

type CompactionTaskGroup struct {
	// PartitionKey is an opaque grouping key for display/logging.
	PartitionKey string

	// Tasks are the FileScanTasks to compact.
	Tasks []FileScanTask

	// TotalSizeBytes is the sum of data file sizes in this group.
	TotalSizeBytes int64
}

CompactionTaskGroup is a set of scan tasks in the same partition that should be compacted together. This bridges the compaction planner (table/compaction package) and the executor, avoiding a circular import between table and table/compaction.

Use [compaction.Config.PlanCompaction] to produce groups, then convert [compaction.Group] → CompactionTaskGroup to call Transaction.RewriteDataFiles or ExecuteCompactionGroup.

type DataFileArgs 

type DataFileArgs struct {
	// Schema is the Iceberg schema the file's contents conform to.
	// Per-column statistics are matched by leaf-column path: each file
	// column's dotted path MUST equal the path derived from this schema's
	// field names. Embedded field-id metadata in the file (e.g. the Parquet
	// "PARQUET:field_id" key) is not consulted, so a column renamed relative
	// to the file will not resolve.
	Schema *iceberg.Schema

	// Spec is the partition spec the resulting DataFile is bound to —
	// typically tbl.Spec(). The zero value [iceberg.PartitionSpec]{} is
	// equivalent to *iceberg.UnpartitionedSpec and is accepted for
	// unpartitioned tables.
	Spec iceberg.PartitionSpec

	// Format identifies the on-disk file format and selects the internal
	// FileFormat implementation used to extract per-column statistics from
	// Metadata. It must match the concrete type of Metadata: the only supported
	// combination today is [iceberg.ParquetFile] with a *metadata.FileMetaData.
	Format iceberg.FileFormat

	// Metadata is the format-specific, in-memory file metadata object produced
	// by the external writer.
	//
	// Today only Format == [iceberg.ParquetFile] with *metadata.FileMetaData is supported
	Metadata any

	// FilePath is the fully qualified location the file bytes were
	// written to (the same path that will be recorded in the manifest entry).
	FilePath string

	// FileSize is the byte length of the object at FilePath. Must be
	// greater than zero.
	FileSize int64

	// Content selects which manifest-entry kind to produce — one of
	// [iceberg.EntryContentData], [iceberg.EntryContentEqDeletes] or
	// [iceberg.EntryContentPosDeletes].
	Content iceberg.ManifestEntryContent

	// PartitionValues maps spec field ID → partition value. Leave the map
	// nil/empty for unpartitioned tables, where any supplied value is rejected.
	//
	// Values must already be the transform results in the expected Go types.
	// A field is resolved as follows:
	//   - key present with a non-nil value: that value is recorded verbatim;
	//   - key present with a nil value, or key absent: treated as "not supplied"
	//     and, for order-preserving transforms (identity, truncate, the date/time
	//     transforms), inferred from the file's column statistics; for
	//     non-order-preserving transforms (bucket, void) it stays nil.
	//
	// Void-transform fields may be omitted (they always resolve to nil).
	//
	// This helper validates only that any supplied field IDs belong to the spec
	// (no stray IDs); it does not coerce or type-check the values themselves.
	// Callers are responsible for supplying values of the correct type.
	PartitionValues map[int]any

	// SortOrderID is the sort-order ID recorded on the manifest entry,
	// typically tbl.SortOrder().OrderID(). Zero means "unsorted".
	SortOrderID int

	// Properties are consulted only for write-side metrics-mode keys
	// (write.metadata.metrics.default and per-column
	// write.metadata.metrics.column.<name> overrides) that decide
	// which columns get full vs truncated vs no statistics. Pass
	// tbl.Properties() for table-default behavior; nil is safe.
	Properties iceberg.Properties

	// EqualityFieldIDs lists the schema field IDs that an equality
	// delete file matches on. Required when
	// Content == [iceberg.EntryContentEqDeletes] and MUST be empty
	// for every other Content value. Every listed ID must be present in Schema.
	EqualityFieldIDs []int

	// FormatVersion is the table's format version
	FormatVersion int

	// FirstRowID sets the data file's first_row_id (requires FormatVersion >= 3).
	// It must always be nil for delete files, and for v1/v2 data files (the
	// field is absent from those schemas).
	//
	// For v3 data files, whether it is required depends on which consuming API
	// the resulting DataFile is handed to:
	//   - [Transaction.AddDataFiles]: REQUIRED. These are externally-written
	//     files, so the library cannot fabricate row IDs for them; a nil
	//     first_row_id is rejected at commit time.
	//   - [Transaction.ReplaceDataFilesWithDataFiles]: REQUIRED for the added
	//     files, except when the caller opts into rewrite/compaction semantics
	//     (WithRewriteSemantics), where the manifest-list writer assigns it by
	//     inheritance and it may be left nil.
	//   - [Transaction.NewRowDelta] (via RowDelta.AddRows): NOT required — the
	//     value is assigned by inheritance from the manifest at commit time, so
	//     leaving it nil is correct.
	//
	// In short: set it explicitly whenever the file goes through AddDataFiles
	// (or a non-rewrite replace); otherwise leave it nil and let inheritance
	// assign it.
	FirstRowID *int64

	// ReferencedDataFile, when non-nil, records the single data file that a
	// file-scoped position-delete file applies to.
	//
	// It is only valid for position delete files. Leave it nil for data files, equality-delete files,
	// and partition-scoped position deletes.
	//
	// For partition-scoped position deletes whose file_path column references more
	// than one data file (cardinality > 1) — such a file has no single referenced data file.
	ReferencedDataFile *string
}

DataFileArgs collects everything needed to compute a fully populated iceberg.DataFile (data, equality-delete, or positional-delete) from a file's in-memory, format-specific metadata object without performing any filesystem reads.

type DeleteOption 

type DeleteOption func(deleteOp *deleteOperation)

func WithDeleteCaseInsensitive 

func WithDeleteCaseInsensitive() DeleteOption

WithDeleteCaseInsensitive changes the binding of the filter to be case insensitive instead of the Default: case sensitive Note that the sensitivity only applies to the field name and not the evaluation of the literals on string fields.

func WithDeleteConcurrency 

func WithDeleteConcurrency(concurrency int) DeleteOption

WithDeleteConcurrency overwrites the default concurrency for delete operations. Default: runtime.GOMAXPROCS(0)

type EncryptionKey 

type EncryptionKey struct {
	KeyID                string            `json:"key-id"`
	EncryptedKeyMetadata string            `json:"encrypted-key-metadata"`
	EncryptedByID        *string           `json:"encrypted-by-id,omitempty"`
	Properties           map[string]string `json:"properties,omitempty"`
}

EncryptionKey represents an encryption key stored in table metadata (V3+).

func (EncryptionKey) Equals 

func (e EncryptionKey) Equals(other EncryptionKey) bool

type ErrIncompatibleSchema 

type ErrIncompatibleSchema struct {
	// contains filtered or unexported fields
}

func (ErrIncompatibleSchema) Error 

func (e ErrIncompatibleSchema) Error() string

func (ErrIncompatibleSchema) Unwrap 

func (e ErrIncompatibleSchema) Unwrap() error

type ExpireSnapshotsOpt 

type ExpireSnapshotsOpt func(*expireSnapshotsCfg)

func WithOlderThan 

func WithOlderThan(t time.Duration) ExpireSnapshotsOpt

WithOlderThan expires snapshots older than the given duration, measured from the current time. It overrides the MaxSnapshotAgeMsKey ("max-snapshot-age-ms") table property for this call. The most recent snapshots are still retained up to the count set by WithRetainLast. This option does not expire branches or tags based on their age; configure max-ref-age-ms on the ref or table for that.

func WithPostCommit 

func WithPostCommit(postCommit bool) ExpireSnapshotsOpt

WithPostCommit controls whether orphaned files (manifests, manifest lists, data files) are deleted immediately after expiring snapshots. Defaults to true. Set to false to defer file deletion to a separate maintenance job, avoiding conflicts with in-flight queries that may still reference those files.

func WithRetainLast 

func WithRetainLast(n int) ExpireSnapshotsOpt

WithRetainLast sets the minimum number of snapshots to keep per branch, regardless of age. It overrides the MinSnapshotsToKeepKey ("min-snapshots-to-keep") table property for this call. Snapshots beyond this count become eligible for expiry only once they are also older than the configured age (see WithOlderThan).

type FSysF 

type FSysF func(ctx context.Context) (icebergio.IO, error)

type FileScanTask 

type FileScanTask struct {
	File                iceberg.DataFile
	DeleteFiles         []iceberg.DataFile // positional delete files
	EqualityDeleteFiles []iceberg.DataFile // equality delete files
	DeletionVectorFiles []iceberg.DataFile // deletion vectors (puffin files)
	Start, Length       int64

	// Row lineage (v3): constants used when reading to synthesize _row_id and _last_updated_sequence_number.
	// FirstRowID is the effective first_row_id for this file (from manifest entry, after inheritance).
	// DataSequenceNumber is the data sequence number of the file's manifest entry.
	FirstRowID         *int64
	DataSequenceNumber *int64
}

type Identifier 

type Identifier = []string

type IncompatibleField 

type IncompatibleField struct {
	Field           iceberg.NestedField
	ColName         string
	UnsupportedType *UnsupportedType
	InvalidDefault  *InvalidDefault
}

type InspectOption 

type InspectOption func(*InspectTable)

InspectOption configures an InspectTable.

func WithInspectAllocator 

func WithInspectAllocator(alloc memory.Allocator) InspectOption

WithInspectAllocator sets the Arrow memory allocator used to build metadata-table records. Tests can pass a memory.CheckedAllocator to detect leaks; callers with memory accounting can inject their own pool.

type InspectTable 

type InspectTable struct {
	// contains filtered or unexported fields
}

InspectTable exposes a table's metadata (snapshots, history, manifests, and so on) as queryable Arrow tables. It mirrors the metadata tables offered by the Java, PyIceberg, and Rust clients.

Obtain one via Table.Inspect. Each method returns an array.RecordReader that the caller is responsible for releasing.

func (InspectTable) History 

func (i InspectTable) History(ctx context.Context) (array.RecordReader, error)

History returns the chronological log of every snapshot that was ever the table's current snapshot, one row per snapshot-log entry. Rolled-back snapshots remain visible but are flagged via is_current_ancestor.

Columns:

  • made_current_at (timestamptz, required): when the snapshot became current
  • snapshot_id (long, required): the snapshot that became current
  • parent_id (long, optional): the snapshot's parent, null when the snapshot has no parent or has since been expired
  • is_current_ancestor (boolean, required): whether the snapshot is an ancestor of the current snapshot; false for rolled-back snapshots

is_current_ancestor is derived by walking the current snapshot's parent chain. If an intermediate ancestor has been expired (removed from the snapshot list), that walk is truncated and snapshots below the gap are reported as non-ancestors. Well-formed tables never hit this: ExpireSnapshots keeps the current snapshot and its full ancestry intact. This matches the silent-truncation behavior of the Java, PyIceberg, and Rust clients.

The returned reader holds a single record batch. The caller must Release it.

func (InspectTable) Snapshots 

func (i InspectTable) Snapshots(ctx context.Context) (array.RecordReader, error)

Snapshots returns one row per snapshot known to the table, in the order they are stored in metadata.

Columns:

  • committed_at (timestamptz, required): when the snapshot was committed
  • snapshot_id (long, required): the snapshot id
  • parent_id (long, optional): the parent snapshot id, null for a root
  • operation (string, optional): the snapshot summary operation, null when the snapshot carries no summary
  • manifest_list (string, optional): path to the snapshot's manifest list
  • summary (map<string,string>, optional): the stored snapshot summary, including the "operation" key alongside its additional properties; null when the snapshot carries no summary

The returned reader holds a single record batch. The caller must Release it.

type InvalidDefault 

type InvalidDefault struct {
	MinFormatVersion  int
	MustBeNullForType bool
}

type IsolationLevel 

type IsolationLevel string

IsolationLevel controls how strictly a commit rejects concurrent writes on the same branch. It mirrors org.apache.iceberg.IsolationLevel from the Java reference. 

const (
	// IsolationSerializable rejects any concurrent commit that added
	// data files matching the committer's filter since the base
	// snapshot. This is the strongest guarantee: a serializable commit
	// behaves as if it ran in isolation against the base snapshot.
	IsolationSerializable IsolationLevel = "serializable"

	// IsolationSnapshot only rejects concurrent commits that touched
	// files the committer explicitly references (e.g. a position
	// delete whose referenced data file was removed). Concurrent
	// appends into the committer's filter region are allowed.
	IsolationSnapshot IsolationLevel = "snapshot"
)

type LocationProvider 

type LocationProvider interface {
	NewDataLocation(dataFileName string) string
	NewTableMetadataFileLocation(newVersion int) (string, error)
	NewMetadataLocation(metadataFileName string) string
}

func LoadLocationProvider 

func LoadLocationProvider(tableLocation string, tableProps iceberg.Properties) (LocationProvider, error)

type Metadata 

type Metadata interface {
	// Version indicates the version of this metadata, 1 for V1, 2 for V2, etc.
	Version() int
	// TableUUID returns a UUID that identifies the table, generated when the
	// table is created. Implementations must throw an exception if a table's
	// UUID does not match the expected UUID after refreshing metadata.
	TableUUID() uuid.UUID
	// Location is the table's base location. This is used by writerFactory to determine
	// where to store data files, manifest files, and table metadata files.
	Location() string
	// LastUpdatedMillis is the timestamp in milliseconds from the unix epoch when
	// the table was last updated. Each table metadata file should update this
	// field just before writing.
	LastUpdatedMillis() int64
	// LastColumnID returns the highest assigned column ID for the table.
	// This is used to ensure fields are always assigned an unused ID when
	// evolving schemas.
	LastColumnID() int
	// Schemas returns the list of schemas, stored as objects with their
	// schema-id.
	Schemas() []*iceberg.Schema
	// CurrentSchema returns the table's current schema.
	CurrentSchema() *iceberg.Schema
	// PartitionSpecs returns the list of all partition specs in the table.
	PartitionSpecs() []iceberg.PartitionSpec
	// PartitionSpec returns the current partition spec that the table is using.
	PartitionSpec() iceberg.PartitionSpec
	// PartitionSpecByID returns the partition spec with the given ID. Returns
	// nil if the ID is not found in the list of partition specs.
	PartitionSpecByID(int) *iceberg.PartitionSpec
	// DefaultPartitionSpec is the ID of the current spec that writerFactory should
	// use by default.
	DefaultPartitionSpec() int
	// LastPartitionSpecID is the highest assigned partition field ID across
	// all partition specs for the table. This is used to ensure partition
	// fields are always assigned an unused ID when evolving specs.
	LastPartitionSpecID() *int
	// Snapshots returns the list of valid snapshots. Valid snapshots are
	// snapshots for which all data files exist in the file system. A data
	// file must not be deleted from the file system until the last snapshot
	// in which it was listed is garbage collected.
	Snapshots() []Snapshot
	// SnapshotByID find and return a specific snapshot by its ID. Returns
	// nil if the ID is not found in the list of snapshots.
	SnapshotByID(int64) *Snapshot
	// SnapshotByName searches the list of snapshots for a snapshot with a given
	// ref name. Returns nil if there's no ref with this name for a snapshot.
	SnapshotByName(name string) *Snapshot
	// CurrentSnapshot returns the table's current snapshot.
	CurrentSnapshot() *Snapshot
	// Ref returns the snapshot ref for the main branch.
	Ref() SnapshotRef
	// Refs returns a list of snapshot name/reference pairs.
	Refs() iter.Seq2[string, SnapshotRef]
	// SnapshotLogs returns the list of snapshot logs for the table.
	SnapshotLogs() iter.Seq[SnapshotLogEntry]
	// SortOrder returns the table's current sort order, ie: the one with the
	// ID that matches the default-sort-order-id.
	SortOrder() SortOrder
	// SortOrders returns the list of sort orders in the table.
	SortOrders() []SortOrder
	// DefaultSortOrder returns the ID of the current sort order that writerFactory
	// should use by default.
	DefaultSortOrder() int
	// Properties is a string to string map of table properties. This is used
	// to control settings that affect reading and writing and is not intended
	// to be used for arbitrary metadata. For example, commit.retry.num-retries
	// is used to control the number of commit retries.
	Properties() iceberg.Properties
	// PreviousFiles returns the list of metadata log entries for the table.
	PreviousFiles() iter.Seq[MetadataLogEntry]
	Equals(Metadata) bool

	NameMapping() iceberg.NameMapping

	LastSequenceNumber() int64
	// NextRowID returns the next available row ID for v3 tables.
	// Returns 0 for v1/v2 tables or if not set.
	NextRowID() int64
	// Statistics returns an optional list of table statistics.
	// Table statistics files are valid Puffin files.
	// StatisticsFile are informational. A reader can choose to ignore statistics information.
	// StatisticsFile support is not required to read the table correctly.
	// A table can contain many statistics files associated with different table snapshots.
	Statistics() iter.Seq[StatisticsFile]
	// PartitionStatistics returns an optional list of partition statistics files.
	// Partition statistics are not required for reading or planning
	// and readers may ignore them. Each table snapshot may be associated
	// with at most one partition statistics file. A writer can optionally
	// write the partition statistics file during each write operation,
	// or it can also be computed on demand.
	PartitionStatistics() iter.Seq[PartitionStatisticsFile]
	// EncryptionKeys returns the list of encryption keys stored in table metadata (V3+).
	// Returns an empty sequence for V1/V2 tables.
	EncryptionKeys() iter.Seq[EncryptionKey]
}

Metadata for an iceberg table as specified in the Iceberg spec

https://iceberg.apache.org/spec/#iceberg-table-spec

func NewMetadata 

func NewMetadata(sc *iceberg.Schema, partitions *iceberg.PartitionSpec, sortOrder SortOrder, location string, props iceberg.Properties) (Metadata, error)

NewMetadata creates a new table metadata object using the provided schema, information, generating a fresh UUID for the new table metadata. By default, this will generate a V2 table metadata, but this can be modified by adding a "format-version" property to the props map. An error will be returned if the "format-version" property exists and is not a valid version number.

func NewMetadataWithUUID 

func NewMetadataWithUUID(sc *iceberg.Schema, partitions *iceberg.PartitionSpec, sortOrder SortOrder, location string, props iceberg.Properties, tableUuid uuid.UUID) (Metadata, error)

NewMetadataWithUUID is like NewMetadata, but allows the caller to specify the UUID of the table rather than creating a new one.

func ParseMetadata 

func ParseMetadata(r io.Reader) (Metadata, error)

ParseMetadata parses json metadata provided by the passed in reader, returning an error if one is encountered.

func ParseMetadataBytes 

func ParseMetadataBytes(b []byte) (Metadata, error)

ParseMetadataBytes is like ParseMetadataString but for a byte slice.

func ParseMetadataString 

func ParseMetadataString(s string) (Metadata, error)

ParseMetadataString is like ParseMetadata, but for a string rather than an io.Reader.

func UpdateTableMetadata 

func UpdateTableMetadata(base Metadata, updates []Update, metadataLoc string) (Metadata, error)

type MetadataBuilder 

type MetadataBuilder struct {
	// contains filtered or unexported fields
}

MetadataBuilder is a struct used for building and updating Iceberg table metadata.

It keeps track of applied changes in the `updates` field. This can be used to commit changes made to a table to the catalog.

func MetadataBuilderFromBase 

func MetadataBuilderFromBase(metadata Metadata, currentFileLocation string) (*MetadataBuilder, error)

MetadataBuilderFromBase creates a MetadataBuilder from an existing Metadata object. currentFileLocation is the location where the current version of the metadata file is stored. This is used to update the metadata log. If currentFileLocation is empty, the metadata log will not be updated. This should only be used to stage-create tables.

func NewMetadataBuilder 

func NewMetadataBuilder(formatVersion int) (*MetadataBuilder, error)

func (*MetadataBuilder) AddEncryptionKey 

func (b *MetadataBuilder) AddEncryptionKey(key EncryptionKey) error

AddEncryptionKey adds or replaces an encryption key indexed by its key-id. Encryption keys are only supported for format version 3 and above.

func (*MetadataBuilder) AddPartitionSpec 

func (b *MetadataBuilder) AddPartitionSpec(spec *iceberg.PartitionSpec, initial bool) error

func (*MetadataBuilder) AddSchema 

func (b *MetadataBuilder) AddSchema(schema *iceberg.Schema) error

func (*MetadataBuilder) AddSnapshot 

func (b *MetadataBuilder) AddSnapshot(snapshot *Snapshot) error

func (*MetadataBuilder) AddSnapshotUpdate 

func (b *MetadataBuilder) AddSnapshotUpdate(u *addSnapshotUpdate) error

AddSnapshotUpdate adds a snapshot to the builder and stores the supplied *addSnapshotUpdate as the corresponding entry in builder.updates, preserving runtime-only fields (such as the manifest-list rebuild closure used by the OCC retry path) that would be lost if a fresh update object were constructed.

Callers without runtime-only fields should keep using AddSnapshot, which constructs a default *addSnapshotUpdate internally.

func (*MetadataBuilder) AddSortOrder 

func (b *MetadataBuilder) AddSortOrder(sortOrder *SortOrder) error

func (*MetadataBuilder) AppendMetadataLog 

func (b *MetadataBuilder) AppendMetadataLog(entry MetadataLogEntry) *MetadataBuilder

func (*MetadataBuilder) Build 

func (b *MetadataBuilder) Build() (Metadata, error)

func (*MetadataBuilder) CurrentSchema 

func (b *MetadataBuilder) CurrentSchema() *iceberg.Schema

func (*MetadataBuilder) CurrentSpec 

func (b *MetadataBuilder) CurrentSpec() (*iceberg.PartitionSpec, error)

func (*MetadataBuilder) GetSchemaByID 

func (b *MetadataBuilder) GetSchemaByID(id int) (*iceberg.Schema, error)

func (*MetadataBuilder) GetSortOrderByID 

func (b *MetadataBuilder) GetSortOrderByID(id int) (*SortOrder, error)

func (*MetadataBuilder) GetSpecByID 

func (b *MetadataBuilder) GetSpecByID(id int) (*iceberg.PartitionSpec, error)

func (*MetadataBuilder) HasChanges 

func (b *MetadataBuilder) HasChanges() bool

func (*MetadataBuilder) LastColumnID 

func (b *MetadataBuilder) LastColumnID() int

LastColumnID returns the highest field id ever assigned in this table's lifetime, as tracked by the Iceberg spec's last-column-id counter.

func (*MetadataBuilder) LastUpdatedMS 

func (b *MetadataBuilder) LastUpdatedMS() int64

func (*MetadataBuilder) NameMapping 

func (b *MetadataBuilder) NameMapping() iceberg.NameMapping

func (*MetadataBuilder) NextRowID 

func (b *MetadataBuilder) NextRowID() int64

NextRowID returns the next available row ID (for v3 row lineage). For v1/v2 returns 0.

func (*MetadataBuilder) RemoveEncryptionKey 

func (b *MetadataBuilder) RemoveEncryptionKey(keyID string) error

RemoveEncryptionKey removes the encryption key with the given key-id. It is not an error if no such key exists.

func (*MetadataBuilder) RemovePartitionSpecs 

func (b *MetadataBuilder) RemovePartitionSpecs(ints []int) error

func (*MetadataBuilder) RemovePartitionStatistics 

func (b *MetadataBuilder) RemovePartitionStatistics(snapshotID int64) error

RemovePartitionStatistics removes the partition statistics file associated with the given snapshot ID. It is not an error if no such file exists.

func (*MetadataBuilder) RemoveProperties 

func (b *MetadataBuilder) RemoveProperties(keys []string) error

func (*MetadataBuilder) RemoveSchemas 

func (b *MetadataBuilder) RemoveSchemas(ints []int) error

func (*MetadataBuilder) RemoveSnapshotRef 

func (b *MetadataBuilder) RemoveSnapshotRef(name string) error

func (*MetadataBuilder) RemoveSnapshots 

func (b *MetadataBuilder) RemoveSnapshots(snapshotIds []int64, postCommit bool) error

func (*MetadataBuilder) RemoveStatistics 

func (b *MetadataBuilder) RemoveStatistics(snapshotID int64) error

RemoveStatistics removes the statistics file associated with the given snapshot ID. It is not an error if no such file exists.

func (*MetadataBuilder) SetCurrentSchemaID 

func (b *MetadataBuilder) SetCurrentSchemaID(currentSchemaID int) error

func (*MetadataBuilder) SetDefaultSortOrderID 

func (b *MetadataBuilder) SetDefaultSortOrderID(defaultSortOrderID int) error

func (*MetadataBuilder) SetDefaultSpecID 

func (b *MetadataBuilder) SetDefaultSpecID(defaultSpecID int) error

func (*MetadataBuilder) SetFormatVersion 

func (b *MetadataBuilder) SetFormatVersion(formatVersion int) error

func (*MetadataBuilder) SetLastUpdatedMS 

func (b *MetadataBuilder) SetLastUpdatedMS() *MetadataBuilder

func (*MetadataBuilder) SetLoc 

func (b *MetadataBuilder) SetLoc(loc string) error

func (*MetadataBuilder) SetPartitionStatistics 

func (b *MetadataBuilder) SetPartitionStatistics(stats PartitionStatisticsFile) error

SetPartitionStatistics adds or replaces a partition statistics file for the given snapshot. If a partition statistics file with the same snapshot ID already exists it is replaced, otherwise the file is appended.

func (*MetadataBuilder) SetProperties 

func (b *MetadataBuilder) SetProperties(props iceberg.Properties) error

func (*MetadataBuilder) SetSnapshotRef 

func (b *MetadataBuilder) SetSnapshotRef(
	name string,
	snapshotID int64,
	refType RefType,
	options ...setSnapshotRefOption,
) error

func (*MetadataBuilder) SetStatistics 

func (b *MetadataBuilder) SetStatistics(stats StatisticsFile) error

SetStatistics adds or replaces a statistics file for the given snapshot. If a statistics file with the same snapshot ID already exists it is replaced, otherwise the file is appended.

func (*MetadataBuilder) SetUUID 

func (b *MetadataBuilder) SetUUID(newUUID uuid.UUID) error

func (*MetadataBuilder) SnapshotByID 

func (b *MetadataBuilder) SnapshotByID(id int64) (*Snapshot, error)

func (*MetadataBuilder) TrimMetadataLogs 

func (b *MetadataBuilder) TrimMetadataLogs(maxEntries int) *MetadataBuilder

type MetadataLogEntry 

type MetadataLogEntry struct {
	MetadataFile string `json:"metadata-file"`
	TimestampMs  int64  `json:"timestamp-ms"`
}

type MoveOp 

type MoveOp string
const (
	MoveOpFirst  MoveOp = "first"
	MoveOpBefore MoveOp = "before"
	MoveOpAfter  MoveOp = "after"
)

type NoOpReason 

type NoOpReason int

NoOpReason explains why a rewrite changed nothing. It lets callers tell a table with no current snapshot apart from one whose manifests are already optimal, which would otherwise both surface as an empty result. 

const (
	// NoOpNone means the rewrite produced changes (not a no-op).
	NoOpNone NoOpReason = iota
	// NoOpNoSnapshot means the table had no current snapshot to rewrite.
	NoOpNoSnapshot
	// NoOpAlreadyOptimal means the eligible manifests were already optimal.
	NoOpAlreadyOptimal
)

func (NoOpReason) String 

func (r NoOpReason) String() string

type NullOrder 

type NullOrder string
const (
	NullsFirst NullOrder = "nulls-first"
	NullsLast  NullOrder = "nulls-last"
)

type Operation 

type Operation string
const (
	OpAppend    Operation = "append"
	OpReplace   Operation = "replace"
	OpOverwrite Operation = "overwrite"
	OpDelete    Operation = "delete"
)

func ValidOperation 

func ValidOperation(s string) (Operation, error)

ValidOperation ensures that a given string is one of the valid operation types: append,replace,overwrite,delete

type Option 

type Option func(*Table)

Option configures a Table at construction. Options are applied in order after the core fields are set.

func WithMetricsReporter 

func WithMetricsReporter(r metrics.Reporter) Option

WithMetricsReporter sets the metrics reporter for the table; scans created from the table inherit it. A nil reporter is ignored (the table keeps its default no-op reporter).

type OrphanCleanupOption 

type OrphanCleanupOption func(*orphanCleanupConfig)

func WithCleanupMaxConcurrency 

func WithCleanupMaxConcurrency(maxWorkers int) OrphanCleanupOption

WithCleanupMaxConcurrency sets the maximum number of goroutines for parallel deletion. Defaults to a reasonable number based on the system. Only used when deleteFunc is nil or when the FileIO doesn't support bulk operations.

func WithDeleteFunc 

func WithDeleteFunc(deleteFunc func(string) error) OrphanCleanupOption

WithDeleteFunc sets a custom delete function. If not provided, the table's FileIO delete method will be used.

func WithDryRun 

func WithDryRun(enabled bool) OrphanCleanupOption

func WithEqualAuthorities 

func WithEqualAuthorities(authorities map[string]string) OrphanCleanupOption

WithEqualAuthorities specifies authorities that should be considered equivalent. For example, map["endpoint1.s3.amazonaws.com,endpoint2.s3.amazonaws.com"] = "s3.amazonaws.com" treats different S3 endpoints as equivalent. The key can be a comma-separated list.

func WithEqualSchemes 

func WithEqualSchemes(schemes map[string]string) OrphanCleanupOption

WithEqualSchemes specifies schemes that should be considered equivalent. For example, map["s3,s3a,s3n"] = "s3" treats all S3 scheme variants as equivalent. The key can be a comma-separated list of schemes that map to the value scheme.

func WithFilesOlderThan 

func WithFilesOlderThan(duration time.Duration) OrphanCleanupOption

func WithLocation 

func WithLocation(location string) OrphanCleanupOption

func WithPrefixMismatchMode 

func WithPrefixMismatchMode(mode PrefixMismatchMode) OrphanCleanupOption

WithPrefixMismatchMode sets how to handle situations when metadata references files that match listed files except for authority/scheme differences.

type OrphanCleanupResult 

type OrphanCleanupResult struct {
	// OrphanFileLocations is retained for backward compatibility with callers
	// that consume only orphan paths. Prefer OrphanFiles for canonical path+size data.
	OrphanFileLocations []string
	// OrphanFiles is the canonical richer orphan result, carrying both path and size.
	OrphanFiles  []OrphanFile
	DeletedFiles []string
	// TotalSizeBytes is the combined size of orphan files only, not all scanned files.
	TotalSizeBytes int64
}

type OrphanFile 

type OrphanFile struct {
	Path      string
	SizeBytes int64
}

type OverwriteOption 

type OverwriteOption func(op *overwriteOperation)

OverwriteOption applies options to overwrite operations

func WithOverwriteCaseInsensitive 

func WithOverwriteCaseInsensitive() OverwriteOption

WithOverwriteCaseInsensitive overwrites the default case sensitivity that applies on the binding of the filter. Default: case sensitive Note that the sensitivity only applies to the field name and not the evaluation of the literals on string fields.

func WithOverwriteConcurrency 

func WithOverwriteConcurrency(concurrency int) OverwriteOption

WithOverwriteConcurrency overwrites the default concurrency for overwrite operations. Default: runtime.GOMAXPROCS(0)

func WithOverwriteFilter 

func WithOverwriteFilter(filter iceberg.BooleanExpression) OverwriteOption

WithOverwriteFilter overwrites the default deletion filter on overwrite operations. Default: iceberg.AlwaysTrue

type PartitionStatisticsFile 

type PartitionStatisticsFile struct {
	SnapshotID      int64  `json:"snapshot-id"`
	StatisticsPath  string `json:"statistics-path"`
	FileSizeInBytes int64  `json:"file-size-in-bytes"`
}

PartitionStatisticsFile represents a partition statistics file that can be used to read table data more efficiently.

Statistics are informational. A reader can choose to ignore statistics information. Statistics support is not required to read the table correctly.

type PlanIO 

type PlanIO interface {
	Load(context.Context) (icebergio.IO, error)
	Close() error
}

PlanIO lazily loads the FileIO used to read a planned scan and closes any resources it holds (e.g. plan-scoped credentials) once reading is done. Nil means the scan keeps using the table's normal FileIO. Remote planners may return a PlanIO backed by plan-scoped storage credentials.

Delivery contract (OQ1): a returned ScanPlanningResult.IO is stored on the Scan that planned it; ReadTasks then loads from it instead of the table's FileIO and closes it after the returned iterator finishes. This ties a plan-scoped scan to the PlanFiles -> ReadTasks sequence on one Scan — tasks from a remote plan must be read by the Scan that produced them, and a Scan carrying plan-scoped IO is not safe for concurrent PlanFiles/ReadTasks.

type PositionDeltaWriter 

type PositionDeltaWriter struct {
	// contains filtered or unexported fields
}

PositionDeltaWriter writes data files for the position-delta MoR pattern, distinguishing reinserted rows (survivors of a position-delta rewrite that preserve their original _row_id) from fresh inserts (rows that get a new _row_id synthesized at read time).

Scope: this writer produces *data files only*. The position-delete entries that pair with reinserts (and that turn an UPDATE into delete-old + reinsert) are not emitted here — the engine driver is responsible for composing this writer with a position-delete writer and committing both via a RowDelta-style snapshot. This mirrors the data-file half of Java's SparkPositionDeltaWrite.reinsert(meta, row) vs insert(row) split.

_last_updated_sequence_number is intentionally not written: the row-id-only file schema lets the reader synthesize it from the manifest entry's data_sequence_number, which after the rewrite is the new snapshot's sequence number — the value the spec requires.

Memory model: Reinsert and Insert retain each batch and accumulate them in memory until PositionDeltaWriter.Close flushes everything to Parquet in a single WriteRecords pass. Peak memory therefore scales with the total Arrow payload of all staged batches, which is appropriate for engine-driver UPDATE flows but not for full-partition compaction. A streaming variant that takes the iterator at construction time is left for the position-delete writer PR.

Usage: 

w, err := table.NewPositionDeltaWriter(tbl)
w.Reinsert(survivorBatch)  // batch must include _row_id column with non-null values
w.Insert(freshBatch)       // batch without _row_id (writer appends nulls)
dataFiles, err := w.Close(ctx)

func NewPositionDeltaWriter 

func NewPositionDeltaWriter(tbl *Table, opts ...WriteRecordOption) (*PositionDeltaWriter, error)

NewPositionDeltaWriter creates a writer for the position-delta MoR update pattern on the given table. The table must be format version 3 or higher.

Caller-supplied opts are forwarded to the underlying WriteRecords call at PositionDeltaWriter.Close. WithWriteUUID and WithPreserveRowLineage are reserved by this writer and will override any caller-supplied values for those two options; everything else (target file size, worker count, clustered write) flows through.

func (*PositionDeltaWriter) Close 

func (w *PositionDeltaWriter) Close(ctx context.Context) ([]iceberg.DataFile, error)

Close finalizes the writer and returns the data files produced. The returned files contain both reinserted and fresh rows, with the _row_id column written explicitly for reinserted rows (non-null) and left null for fresh inserts.

The caller is responsible for adding these files to a snapshot (typically via a Transaction's snapshot producer) along with any position-delete entries that pair with the reinserts.

func (*PositionDeltaWriter) Insert 

func (w *PositionDeltaWriter) Insert(batch arrow.RecordBatch) error

Insert adds fresh rows that get a new _row_id at read time. The batch should NOT contain a _row_id column; if it does, all values must be null. These rows represent genuinely new data (not survivors of a rewrite).

func (*PositionDeltaWriter) Reinsert 

func (w *PositionDeltaWriter) Reinsert(batch arrow.RecordBatch) error

Reinsert adds survivor rows that preserve their original _row_id. The batch MUST contain a _row_id column (field name "_row_id") with non-null int64 values representing the preserved row identities.

Per the Iceberg spec, only position-delete rewrites and CoW can preserve lineage. Equality deletes cannot preserve lineage because the engine writes without reading old identity.

type PrefixMismatchMode 

type PrefixMismatchMode int

PrefixMismatchMode defines how to handle cases where candidate files have different URI schemes or authorities compared to table location during orphan cleanup. This is useful when files may be referenced using different but equivalent schemes (e.g., s3:// vs s3a:// vs s3n://) or when cleaning up files across different locations. 

const (
	// PrefixMismatchError causes cleanup to fail with an error when candidate files
	// have URI schemes/authorities that don't match the table location and are not
	// covered by configured equivalences. This is the safest default behavior.
	PrefixMismatchError PrefixMismatchMode = iota // default

	// PrefixMismatchIgnore skips candidate files that have mismatched URI schemes/authorities
	// without treating it as an error. Files are silently ignored and not considered for deletion.
	PrefixMismatchIgnore

	// PrefixMismatchDelete treats candidate files with mismatched URI schemes/authorities
	// as orphans and includes them for deletion. Use with caution as this may delete
	// files from unexpected locations.
	PrefixMismatchDelete
)

func (PrefixMismatchMode) String 

func (p PrefixMismatchMode) String() string

type ReassignedIds 

type ReassignedIds struct {
	// contains filtered or unexported fields
}

type RefType 

type RefType string

RefType will be either a BranchRef or a TagRef 

const (
	BranchRef RefType = "branch"
	TagRef    RefType = "tag"
)

type Requirement 

type Requirement interface {
	// Validate checks that the current table metadata satisfies the requirement.
	Validate(Metadata) error
	GetType() string
}

A Requirement is a validation rule that must be satisfied before attempting to make and commit changes to a table. Requirements are used to ensure that the table is in a valid state before making changes.

func AssertCreate 

func AssertCreate() Requirement

AssertCreate creates a requirement that the table does not already exist.

func AssertCurrentSchemaID 

func AssertCurrentSchemaID(id int) Requirement

AssertCurrentSchemaId creates a requirement that the table's current schema ID matches the given id.

func AssertDefaultSortOrderID 

func AssertDefaultSortOrderID(id int) Requirement

AssertDefaultSortOrderID creates a requirement that the table's default sort order ID matches the given id.

func AssertDefaultSpecID 

func AssertDefaultSpecID(id int) Requirement

AssertDefaultSpecID creates a requirement that the table's default partition spec ID matches the given id.

func AssertLastAssignedFieldID 

func AssertLastAssignedFieldID(id int) Requirement

AssertLastAssignedFieldID validates that the table's last assigned column ID matches the given id.

func AssertLastAssignedPartitionID 

func AssertLastAssignedPartitionID(id int) Requirement

AssertLastAssignedPartitionID creates a requriement that the table's last assigned partition ID matches the given id.

func AssertRefSnapshotID 

func AssertRefSnapshotID(ref string, id *int64) Requirement

AssertRefSnapshotID creates a requirement which ensures that the table branch or tag identified by the given ref must reference the given snapshot id. If the id is nil, the ref must not already exist.

func AssertTableUUID 

func AssertTableUUID(uuid uuid.UUID) Requirement

AssertTableUUID creates a requirement that the table UUID matches the given UUID.

func ParseRequirement 

func ParseRequirement(r io.Reader) (Requirement, error)

ParseRequirement parses json data provided by the reader into a Requirement

func ParseRequirementBytes 

func ParseRequirementBytes(b []byte) (Requirement, error)

ParseRequirementBytes parses json bytes into a Requirement

func ParseRequirementString 

func ParseRequirementString(s string) (Requirement, error)

ParseRequirementString parses json string into a Requirement

type Requirements 

type Requirements []Requirement

func (*Requirements) UnmarshalJSON 

func (r *Requirements) UnmarshalJSON(data []byte) error

type RewriteDataFilesOptions 

type RewriteDataFilesOptions struct {
	// PartialProgress, when true, stages each group as its own
	// rewrite snapshot inside the loop so a mid-loop write failure
	// leaves the already-completed groups staged on this transaction
	// (the in-memory transaction can be discarded by group rather
	// than wholesale). When false (the default), every group lands in
	// a single atomic rewrite snapshot.
	//
	// In both modes the catalog commit happens once at
	// [Transaction.Commit] time, so a process crash mid-loop loses
	// every staged group regardless of this flag. Callers who need
	// true per-group catalog durability (matching Java's behavior)
	// should drive [Transaction.NewRewrite] themselves and commit a
	// fresh transaction per group.
	PartialProgress bool

	// SnapshotProps are added to the rewrite snapshot's summary.
	// In partial-progress mode the same properties land on every
	// per-group snapshot rather than being summed or split.
	SnapshotProps iceberg.Properties

	// ExtraDeleteFilesToRemove are delete files that are dead after
	// the rewrite and that the caller wants expunged in the same
	// snapshot. Honored only when PartialProgress is false.
	//
	// Use [compaction.CollectDeadEqualityDeletes] and
	// [compaction.CollectDeadPositionDeletes] to compute this list
	// from the current snapshot. Position deletes attached to
	// rewritten tasks are already removed by the per-group staging;
	// listing them again here is harmless (each file is removed and
	// counted once).
	ExtraDeleteFilesToRemove []iceberg.DataFile

	// GroupOptions are forwarded to every [ExecuteCompactionGroup]
	// call to tune the per-group read+write pipeline (target file
	// size, scan concurrency). See the With* helpers returning
	// [CompactionGroupOption].
	GroupOptions []CompactionGroupOption
}

RewriteDataFilesOptions bundles the per-rewrite knobs for Transaction.RewriteDataFiles.

type RewriteFiles 

type RewriteFiles struct {
	// contains filtered or unexported fields
}

RewriteFiles is the snapshot-operation builder for rewrite (compaction) commits. It is the snapshot-level sibling of RowDelta and mirrors Java's org.apache.iceberg.RewriteFiles interface (returned by Table.newRewrite() in Java).

Compared to a raw Transaction.ReplaceFiles call, the builder owns the rewrite-specific isolation contract internally:

  • The overwrite producer's default isolation validator is suppressed (concurrent appends into rewritten partitions are allowed; this is the defining behavior of a rewrite).
  • A rewrite-specific conflict validator is registered so concurrent pos/eq-delete files targeting any rewritten data file are rejected pre-flight at Transaction.Commit time. A pos-delete is matched to a rewritten file via its referenced_data_file column, via equal file_path lower/upper bounds when that column is unset, or — when neither resolves a single path — via partition overlap with a rewritten file. Eq-deletes are matched conservatively: any concurrent eq-delete during the rewrite conflicts.

Distributed compaction coordinators construct one RewriteFiles on the leader transaction, feed worker outputs in via RewriteFiles.ApplyResult, and commit one snapshot. In-process callers can use Transaction.RewriteDataFiles which drives this builder internally.

The builder follows the same fail-fast pattern as [view.MetadataBuilder]: a method that hits an invalid input stages the error and short-circuits all subsequent calls until RewriteFiles.Commit drains it. The builder is single-use; once Commit has been called, a second call returns an error regardless of whether the first call succeeded.

Adding new delete files (e.g., rewriting position deletes into deletion vectors) is not yet supported; RewriteFiles.AddDataFile rejects pos/eq-delete inputs at insertion time. Add the support to the underlying Transaction.ReplaceFiles before lifting that restriction.

func (*RewriteFiles) AddDataFile 

func (r *RewriteFiles) AddDataFile(df iceberg.DataFile) *RewriteFiles

AddDataFile queues a new data file. Adding delete files is not yet supported by the underlying snapshot machinery; a pos/eq-delete here stages an error that is returned from the next RewriteFiles.Commit call. The error names the offending file path so callers driving the builder via RewriteFiles.Apply can identify it without tracking queue order.

func (*RewriteFiles) Apply deprecated 

func (r *RewriteFiles) Apply(deletes, adds, safeDeletes []iceberg.DataFile) *RewriteFiles

Apply is a bulk shortcut that routes three slices onto this builder: every entry in deletes and safeDeletes is queued via RewriteFiles.DeleteFile (which routes data vs. delete files by content type), and every entry in adds via RewriteFiles.AddDataFile.

Deprecated: use RewriteFiles.ApplyResult, which also carries SafeDeletionVectors. Apply has no slot for them, so a coordinator wiring worker output through Apply leaves deletion vectors for the rewritten files orphaned.

func (*RewriteFiles) ApplyResult 

func (r *RewriteFiles) ApplyResult(gr CompactionGroupResult) *RewriteFiles

ApplyResult queues a worker's CompactionGroupResult onto this builder, routing OldDataFiles (DeleteFile), NewDataFiles (AddDataFile), SafePosDeletes and SafeDeletionVectors (DeleteFile). Prefer it over RewriteFiles.Apply, which cannot carry SafeDeletionVectors.

Typical distributed-coordinator pattern: 

rewrite := leaderTxn.NewRewrite(snapshotProps)
for _, gr := range workerResults {
    rewrite.ApplyResult(gr)
}
if err := rewrite.Commit(ctx); err != nil { ... }

func (*RewriteFiles) Commit 

func (r *RewriteFiles) Commit(ctx context.Context) error

Commit stages the rewrite snapshot on the underlying transaction. The catalog commit happens once, later, at Transaction.Commit time.

Commit is single-shot: any second call returns an error regardless of whether the first call succeeded, and neither re-stages the rewrite nor re-registers the conflict validator. Returns an error if any file passed to RewriteFiles.AddDataFile or RewriteFiles.DeleteFile had an unsupported content type, if the builder has no file changes, or if the underlying Transaction.ReplaceFiles call fails.

func (*RewriteFiles) DeleteFile 

func (r *RewriteFiles) DeleteFile(df iceberg.DataFile) *RewriteFiles

DeleteFile marks a file for removal in this rewrite. Routes by content type: data files are queued as data-file replacements; pos/eq-delete files are queued for delete-file removal alongside the data rewrite (typical when a delete is fully applied to data files being rewritten and is therefore safe to expunge).

Any other content type stages an error that is returned from the next RewriteFiles.Commit call.

type RewriteManifestsOpt 

type RewriteManifestsOpt func(*rewriteManifestsCfg)

RewriteManifestsOpt configures Transaction.RewriteManifests.

func WithManifestTargetSize 

func WithManifestTargetSize(size int64) RewriteManifestsOpt

WithManifestTargetSize overrides the target manifest size in bytes. A non-positive size is ignored, leaving the default from the commit.manifest.target-size-bytes property.

func WithRewriteManifestPredicate 

func WithRewriteManifestPredicate(pred func(iceberg.ManifestFile) bool) RewriteManifestsOpt

WithRewriteManifestPredicate only rewrites manifests for which pred is true. Manifests that don't match are left untouched.

func WithRewriteSpecID 

func WithRewriteSpecID(id int) RewriteManifestsOpt

WithRewriteSpecID restricts the rewrite to manifests of one partition spec.

type RewriteManifestsResult 

type RewriteManifestsResult struct {
	// RewrittenManifests are the old manifests that were replaced.
	RewrittenManifests []iceberg.ManifestFile
	// AddedManifests are the new manifests written in their place.
	AddedManifests []iceberg.ManifestFile
	// NoOpReason is set when the rewrite changed nothing, distinguishing a
	// missing snapshot from an already-optimal layout. NoOpNone otherwise.
	NoOpReason NoOpReason
}

RewriteManifestsResult reports the manifests changed by a rewrite.

func (*RewriteManifestsResult) IsNoOp 

func (r *RewriteManifestsResult) IsNoOp() bool

IsNoOp reports whether the rewrite changed nothing. Callers should skip the commit in that case rather than staging an empty REPLACE snapshot. NoOpReason is the single source of truth.

type RewriteResult 

type RewriteResult struct {
	// RewrittenGroups is the number of compaction groups committed.
	RewrittenGroups int

	// AddedDataFiles is the total number of new data files written.
	AddedDataFiles int

	// RemovedDataFiles is the total number of old data files replaced.
	RemovedDataFiles int

	// RemovedPositionDeleteFiles is the count of position delete files
	// removed because their referenced data file was rewritten or
	// because they were passed via
	// [RewriteDataFilesOptions.ExtraDeleteFilesToRemove].
	RemovedPositionDeleteFiles int

	// RemovedEqualityDeleteFiles is the count of equality delete files
	// removed via [RewriteDataFilesOptions.ExtraDeleteFilesToRemove].
	// The caller computes which eq-deletes are dead — typically via
	// [compaction.CollectDeadEqualityDeletes] — and passes the list in.
	RemovedEqualityDeleteFiles int

	// RemovedDeletionVectorFiles is the count of deletion vectors removed
	// because their referenced data file was rewritten.
	RemovedDeletionVectorFiles int

	// BytesBefore is the total size of input data files (from the compaction plan).
	BytesBefore int64

	// BytesAfter is the total size of output data files (measured from written files).
	BytesAfter int64
}

RewriteResult summarizes a completed compaction.

type RollingDataWriter 

type RollingDataWriter struct {
	// contains filtered or unexported fields
}

RollingDataWriter writes Arrow records for a specific partition, rolling to new data files when the actual compressed file size reaches the target.

func (*RollingDataWriter) Add 

func (r *RollingDataWriter) Add(record arrow.RecordBatch) error

Add appends a record to the writer's buffer.

type RowDelta 

type RowDelta struct {
	// contains filtered or unexported fields
}

RowDelta encodes a set of row-level changes to a table: new data files (inserts) and delete files (equality or position deletes). All changes are committed atomically in a single snapshot.

The operation type of the produced snapshot is determined automatically:

  • Data files only → OpAppend
  • Delete files only → OpDelete
  • Both data and delete files → OpOverwrite

This matches the semantics of Java's BaseRowDelta. It is the primary API for CDC/streaming workloads where INSERTs, UPDATEs, and DELETEs must be committed together.

Client-side conflict validation runs before the commit is sent to the catalog:

  • Position deletes: referenced data files must still be reachable from the current branch head (validateDataFilesExist).
  • Equality deletes under write.delete.isolation-level=serializable (the default): concurrent data files in the same partition(s) as the equality deletes are rejected. For partitioned tables an OR-of-equalities filter is built from the eq-delete files' partition tuples and routed through validateAddedDataFilesMatchingFilter (spec-evolution safe, manifest-summary pruning, type-aware evaluation). For unpartitioned tables the check is conservative (AlwaysTrue — any concurrent append is a conflict). Opt out by setting write.delete.isolation-level=snapshot.

Refresh-and-replay between retries is deferred to a follow-up PR; today the pre-flight runs once on the first attempt.

Usage: 

rd := tx.NewRowDelta(snapshotProps)
rd.AddRows(dataFile1, dataFile2)
rd.AddDeletes(equalityDeleteFile1)
err := rd.Commit(ctx)

func (*RowDelta) AddDeletes 

func (rd *RowDelta) AddDeletes(files ...iceberg.DataFile) *RowDelta

AddDeletes adds delete files (equality or position) to this RowDelta. Equality delete files must have ContentType == EntryContentEqDeletes and non-empty EqualityFieldIDs referencing valid schema columns. Position delete files must have ContentType == EntryContentPosDeletes.

func (*RowDelta) AddRows 

func (rd *RowDelta) AddRows(files ...iceberg.DataFile) *RowDelta

AddRows adds data files containing new rows (inserts) to this RowDelta.

func (*RowDelta) Commit 

func (rd *RowDelta) Commit(ctx context.Context) error

Commit validates and commits all accumulated row-level changes as a single atomic snapshot. Returns an error if there are no files to commit, if any file has an unexpected content type, or if the table format version does not support delete files.

func (*RowDelta) Operation 

func (rd *RowDelta) Operation() Operation

Operation returns the snapshot operation type that will be used when this RowDelta is committed:

  • data only → OpAppend
  • deletes only → OpDelete
  • both → OpOverwrite

type Scan 

type Scan struct {
	// contains filtered or unexported fields
}

func (*Scan) PlanFiles 

func (scan *Scan) PlanFiles(ctx context.Context) ([]FileScanTask, error)

PlanFiles orchestrates the fetching and filtering of manifests, and then building a list of FileScanTasks that match the current Scan criteria.

func (*Scan) Projection 

func (scan *Scan) Projection() (*iceberg.Schema, error)

func (*Scan) ReadTasks 

func (scan *Scan) ReadTasks(ctx context.Context, tasks []FileScanTask) (*arrow.Schema, iter.Seq2[arrow.RecordBatch, error], error)

ReadTasks reads Arrow records from a specific set of FileScanTasks, applying the scan's projection, row filters, and positional delete handling. This is useful when the caller has already planned or selected specific tasks to read.

func (*Scan) Reporter 

func (scan *Scan) Reporter() metrics.Reporter

Reporter returns the metrics reporter for this scan, never nil. The scan-planning instrumentation emits its ScanReport through it.

func (*Scan) ResolveSnapshot 

func (scan *Scan) ResolveSnapshot() (*Snapshot, error)

ResolveSnapshot resolves the snapshot selected by this scan. Live scans use the table's current snapshot; explicit snapshot IDs and as-of timestamps must resolve to an existing snapshot.

func (*Scan) Snapshot 

func (scan *Scan) Snapshot() *Snapshot

Snapshot returns the snapshot selected by this scan. It returns nil when an explicit snapshot cannot be resolved; use ResolveSnapshot when the reason for that result must be distinguished from a table with no current snapshot.

func (*Scan) ToArrowRecords 

func (scan *Scan) ToArrowRecords(ctx context.Context) (*arrow.Schema, iter.Seq2[arrow.RecordBatch, error], error)

ToArrowRecords returns the arrow schema of the expected records and an interator that can be used with a range expression to read the records as they are available. If an error is encountered, during the planning and setup then this will return the error directly. If the error occurs while iterating the records, it will be returned by the iterator.

The purpose for returning the schema up front is to handle the case where there are no rows returned. The resulting Arrow Schema of the projection will still be known.

func (*Scan) ToArrowTable 

func (scan *Scan) ToArrowTable(ctx context.Context) (arrow.Table, error)

ToArrowTable calls ToArrowRecords and then gathers all of the records together and returns an arrow.Table make from those records.

func (*Scan) UseRef 

func (scan *Scan) UseRef(name string) (*Scan, error)

func (*Scan) UseRowLimit 

func (scan *Scan) UseRowLimit(n int64) *Scan

type ScanOption 

type ScanOption func(*Scan)

func WitMaxConcurrency deprecated 

func WitMaxConcurrency(n int) ScanOption

WitMaxConcurrency is a deprecated alias for WithMaxConcurrency, kept for backward compatibility with the pre-existing typo'd name.

Deprecated: use WithMaxConcurrency.

func WithCaseSensitive 

func WithCaseSensitive(b bool) ScanOption

func WithLimit 

func WithLimit(n int64) ScanOption

func WithMaxConcurrency 

func WithMaxConcurrency(n int) ScanOption

WithMaxConcurrency sets the maximum concurrency for table scan and plan operations. When unset it defaults to runtime.GOMAXPROCS.

func WithOptions 

func WithOptions(opts iceberg.Properties) ScanOption

func WithReporter 

func WithReporter(r metrics.Reporter) ScanOption

WithReporter overrides the metrics reporter for a single scan, taking precedence over the reporter inherited from the table. A nil reporter is ignored.

func WithRowFilter 

func WithRowFilter(e iceberg.BooleanExpression) ScanOption

func WithRowLineage 

func WithRowLineage() ScanOption

WithRowLineage projects the row-lineage metadata columns (_row_id and _last_updated_sequence_number) so that row identity and per-row update sequence are preserved through rewrites and compactions. Requires a v3 table — calling Scan.Projection on a v1/v2 table after applying this option returns an error.

func WithScanPlanningMode 

func WithScanPlanningMode(mode ScanPlanningMode) ScanOption

WithScanPlanningMode sets the scan-planning mode for a scan. The default is ScanPlanningLocal unless the REST table config requires server planning.

func WithSelectedFields 

func WithSelectedFields(fields ...string) ScanOption

func WithSnapshotAsOf 

func WithSnapshotAsOf(timeStampMs int64) ScanOption

func WithSnapshotID 

func WithSnapshotID(n int64) ScanOption

type ScanPlanner 

type ScanPlanner interface {
	SupportsRemoteScanPlanning() bool
	PlanFiles(context.Context, ScanPlanningRequest) (ScanPlanningResult, error)
}

ScanPlanner plans scans for a table. rest.Catalog implements it; non-REST catalogs leave it nil and planning stays local.

SupportsRemoteScanPlanning reports whether the planner can complete a remote plan end-to-end for the requested scan.

Note: FileScanTask is proposed to gain a `Residual iceberg.BooleanExpression` field so remote tasks can carry the server's residual filter. That field is not added here because it would trip the codec/file_scan_task.go drift guard; it lands with the scan-task decoder PR.

type ScanPlanningMetadata 

type ScanPlanningMetadata interface {
	CurrentSchema() *iceberg.Schema
	Schemas() []*iceberg.Schema
	PartitionSpec() iceberg.PartitionSpec
	PartitionSpecByID(int) *iceberg.PartitionSpec
	CurrentSnapshot() *Snapshot
	SnapshotByID(int64) *Snapshot
	Properties() iceberg.Properties
}

ScanPlanningMetadata is the subset of table.Metadata a ScanPlanner needs: schema binding, snapshot resolution, partition decode, and property-based mode resolution. Narrowing from the full Metadata interface keeps the seam contract honest — planners do not depend on metadata logs, sort orders, or file lists. table.Metadata satisfies it.

type ScanPlanningMode 

type ScanPlanningMode string

ScanPlanningMode is the user-facing scan option: three values (local/remote/auto) selecting how (*Scan).PlanFiles plans a scan. Local planning remains the default; remote is opt-in via WithScanPlanningMode.

This is deliberately distinct from the REST table-config key `scan-planning-mode` (values `client`/`server`), which is a server directive resolved separately (OQ4): a `client` table forces local planning, a `server` table forces remote planning, and explicit conflicting scan options fail fast. There is intentionally no fourth `server` value here; the directive lives in the table config, not the user option. 

const (
	// ScanPlanningLocal always plans locally by reading manifests through the
	// table's FileIO. This is the default and current behavior.
	ScanPlanningLocal ScanPlanningMode = "local"
	// ScanPlanningRemote requires a planner that advertises remote capability
	// and fails loudly if remote planning is unavailable.
	ScanPlanningRemote ScanPlanningMode = "remote"
	// ScanPlanningAuto uses remote planning when available and allowed by the
	// table config, otherwise falls back to local.
	ScanPlanningAuto ScanPlanningMode = "auto"
)

type ScanPlanningRequest 

type ScanPlanningRequest struct {
	Identifier Identifier
	// Metadata is the narrowed planner view of table metadata (see
	// ScanPlanningMetadata); MetadataLocation is kept separate.
	Metadata         ScanPlanningMetadata
	MetadataLocation string
	SnapshotID       *int64
	SelectedFields   []string
	RowFilter        iceberg.BooleanExpression
	MinRowsRequested *int64
	StatsFields      []string
	// CaseSensitive must carry the Scan's value (which defaults to true), not
	// Go's false zero value, or the wire request would flip the spec default.
	// Nil means use the scan default.
	CaseSensitive *bool
	// UseSnapshotSchema is a pointer to distinguish the spec default from an
	// explicit false when the scanner-delegation phase binds it to table config.
	UseSnapshotSchema *bool
}

ScanPlanningRequest is the input a Scan hands to a ScanPlanner. It carries the resolved scan state a planner needs without depending on catalog/rest.

Open question (epic OQ4): when the table has evolved, UseSnapshotSchema must pin which schema binds a returned residual and the partition decode: the snapshot's schema (via schema-id), kept separate from each file's partition spec-id. Incremental scans (start/end snapshot) are deferred to a later phase; point-in-time SnapshotID lands first.

type ScanPlanningResult 

type ScanPlanningResult struct {
	Tasks []FileScanTask
	IO    PlanIO
}

ScanPlanningResult is what a ScanPlanner returns.

type SchemaOptions 

type SchemaOptions struct {
	DowncastTimestamp bool
	IncludeFieldIDs   bool
	UseLargeTypes     bool
	UseWriteDefault   bool
}

SchemaOptions controls the behaviour of ToRequestedSchema.

type SequenceNumberValidator 

type SequenceNumberValidator interface {
	LastSequenceNumber() int64
}

SequenceNumberValidator defines an interface for types that can validate sequence numbers

type Snapshot 

type Snapshot struct {
	SnapshotID       int64    `json:"snapshot-id"`
	ParentSnapshotID *int64   `json:"parent-snapshot-id,omitempty"`
	SequenceNumber   int64    `json:"sequence-number"`
	TimestampMs      int64    `json:"timestamp-ms"`
	ManifestList     string   `json:"manifest-list,omitempty"`
	Summary          *Summary `json:"summary,omitempty"`
	SchemaID         *int     `json:"schema-id,omitempty"`
	FirstRowID       *int64   `json:"first-row-id,omitempty"` // V3: Starting row ID for this snapshot
	AddedRows        *int64   `json:"added-rows,omitempty"`   // V3: Number of rows added by this snapshot
}

func AncestorsBetween 

func AncestorsBetween(latestID, baseID int64, lookup SnapshotLookup) ([]Snapshot, bool)

AncestorsBetween returns the snapshots from latestID (inclusive) down to but not including baseID, by walking the parent chain from latestID backward. The second return value (baseFound) is true when baseID was actually reached during the walk.

These snapshots are the "concurrent" snapshots that a writer based on baseID needs to examine for conflict detection.

When baseFound is false, the walk terminated without reaching baseID — either because latestID was unknown, baseID is not in latestID's ancestry (diverged branch or expired base), the chain was broken by a missing intermediate snapshot, or a cycle was detected in malformed metadata. In all of these cases the returned slice is diagnostic context only — it is NOT an enumerable "concurrent snapshots" list. Callers performing conflict detection MUST treat baseFound=false as divergent and refuse the commit.

Returns (nil, true) when latestID == baseID (no concurrent snapshots).

Snapshots are returned by value in reverse-chronological order.

func AncestorsOf 

func AncestorsOf(snapshotID int64, lookup SnapshotLookup) []Snapshot

AncestorsOf walks the parent chain starting from snapshotID and yields every snapshot reachable via ParentSnapshotID, including the starting snapshot itself. Iteration stops when a snapshot has no parent, the parent cannot be resolved via lookup, or a cycle is detected in malformed metadata.

Returns snapshots by value in reverse-chronological order (newest first). Returns an empty slice if snapshotID cannot be resolved.

The returned slice may be truncated if an intermediate snapshot is missing from the lookup (e.g. expired) or if a cycle is encountered. Callers that need to distinguish a complete walk from a truncated one should use AncestorsOfChecked instead.

func AncestorsOfChecked 

func AncestorsOfChecked(snapshotID int64, lookup SnapshotLookup) ([]Snapshot, bool)

AncestorsOfChecked is AncestorsOf with completeness tracking. The second return value is true when the walk terminated at a snapshot with no parent (a clean root). It is false when the walk was truncated by an unresolvable starting snapshot, a missing intermediate snapshot, or a cycle in malformed metadata.

Callers performing conflict detection (where a truncated ancestry equates to under-counting concurrent snapshots) MUST treat complete=false as divergent and refuse the commit, mirroring AncestorsBetween's baseFound=false contract. When complete is false the returned slice is the partial walk before truncation — diagnostic context only, NOT an enumerable ancestry.

Snapshots are returned by value in reverse-chronological order. Returns an empty slice and false when snapshotID cannot be resolved.

func (Snapshot) Equals 

func (s Snapshot) Equals(other Snapshot) bool

func (Snapshot) Manifests 

func (s Snapshot) Manifests(fio iceio.IO) (_ []iceberg.ManifestFile, err error)

func (Snapshot) String 

func (s Snapshot) String() string

func (Snapshot) ValidateRowLineage 

func (s Snapshot) ValidateRowLineage() error

type SnapshotLogEntry 

type SnapshotLogEntry struct {
	SnapshotID  int64 `json:"snapshot-id"`
	TimestampMs int64 `json:"timestamp-ms"`
}

type SnapshotLookup 

type SnapshotLookup func(id int64) *Snapshot

SnapshotLookup returns the snapshot for the given id, or nil if not found. It matches the signature of Metadata.SnapshotByID.

type SnapshotRef 

type SnapshotRef struct {
	SnapshotID         int64   `json:"snapshot-id"`
	SnapshotRefType    RefType `json:"type"`
	MinSnapshotsToKeep *int    `json:"min-snapshots-to-keep,omitempty"`
	MaxSnapshotAgeMs   *int64  `json:"max-snapshot-age-ms,omitempty"`
	MaxRefAgeMs        *int64  `json:"max-ref-age-ms,omitempty"`
}

SnapshotRef represents the reference information for a specific snapshot

func (*SnapshotRef) Equals 

func (s *SnapshotRef) Equals(rhs SnapshotRef) bool

func (*SnapshotRef) UnmarshalJSON 

func (s *SnapshotRef) UnmarshalJSON(b []byte) error

type SnapshotSummaryCollector 

type SnapshotSummaryCollector struct {
	// contains filtered or unexported fields
}

type SortDirection 

type SortDirection string
const (
	SortASC  SortDirection = "asc"
	SortDESC SortDirection = "desc"
)

type SortField 

type SortField struct {
	// SourceIDs contains the source column ids from the table's schema.
	// For single-argument transforms this will have exactly one element.
	// For multi-argument transforms this will have multiple elements.
	SourceIDs []int `json:"-"`
	// Transform is the tranformation used to produce values to be
	// sorted on from the source column.
	Transform iceberg.Transform `json:"transform"`
	// Direction is an enum indicating ascending or descending direction.
	Direction SortDirection `json:"direction"`
	// NullOrder describes the order of null values when sorting
	// should be only either nulls-first or nulls-last enum values.
	NullOrder NullOrder `json:"null-order"`
}

SortField describes a field used in a sort order definition.

func (SortField) Equals 

func (s SortField) Equals(other SortField) bool

func (*SortField) MarshalJSON 

func (s *SortField) MarshalJSON() ([]byte, error)

func (SortField) SourceID 

func (s SortField) SourceID() int

SourceID returns the first source column id.

func (*SortField) String 

func (s *SortField) String() string

func (*SortField) UnmarshalJSON 

func (s *SortField) UnmarshalJSON(b []byte) error

type SortOrder 

type SortOrder struct {
	// contains filtered or unexported fields
}

SortOrder describes how the data is sorted within the table.

Data can be sorted within partitions by columns to gain performance. The order of the sort fields within the list defines the order in which the sort is applied to the data.

func AssignFreshSortOrderIDs 

func AssignFreshSortOrderIDs(sortOrder SortOrder, old, fresh *iceberg.Schema) (SortOrder, error)

AssignFreshSortOrderIDs updates and reassigns the field source IDs from the old schema to the corresponding fields in the fresh schema, while also giving the Sort Order a fresh ID of 0 (the initial Sort Order ID).

func AssignFreshSortOrderIDsWithID 

func AssignFreshSortOrderIDsWithID(sortOrder SortOrder, old, fresh *iceberg.Schema, sortOrderID int) (SortOrder, error)

AssignFreshSortOrderIDsWithID is like AssignFreshSortOrderIDs but allows specifying the id of the returned SortOrder.

func NewSortOrder 

func NewSortOrder(orderID int, fields []SortField) (SortOrder, error)

NewSortOrder creates a new SortOrder.

The orderID must be greater than or equal to 0. If orderID is 0, no fields can be passed, this is equal to UnsortedSortOrder. Fields need to have non-nil Transform, valid Direction and NullOrder values, and non-empty source IDs.

func (*SortOrder) CheckCompatibility 

func (s *SortOrder) CheckCompatibility(schema *iceberg.Schema) error

func (SortOrder) Equals 

func (s SortOrder) Equals(rhs SortOrder) bool

func (SortOrder) Fields 

func (s SortOrder) Fields() iter.Seq2[int, SortField]

func (SortOrder) IsUnsorted 

func (s SortOrder) IsUnsorted() bool

func (SortOrder) Len 

func (s SortOrder) Len() int

func (SortOrder) MarshalJSON 

func (s SortOrder) MarshalJSON() ([]byte, error)

func (SortOrder) OrderID 

func (s SortOrder) OrderID() int

func (SortOrder) String 

func (s SortOrder) String() string

func (*SortOrder) UnmarshalJSON 

func (s *SortOrder) UnmarshalJSON(b []byte) error

type StagedTable 

type StagedTable struct {
	*Table
}

func (*StagedTable) Refresh 

func (s *StagedTable) Refresh(ctx context.Context) (*Table, error)

func (*StagedTable) Scan 

func (s *StagedTable) Scan(opts ...ScanOption) *Scan

type StatisticsFile 

type StatisticsFile struct {
	SnapshotID            int64          `json:"snapshot-id"`
	StatisticsPath        string         `json:"statistics-path"`
	FileSizeInBytes       int64          `json:"file-size-in-bytes"`
	FileFooterSizeInBytes int64          `json:"file-footer-size-in-bytes"`
	KeyMetadata           *string        `json:"key-metadata,omitempty"`
	BlobMetadata          []BlobMetadata `json:"blob-metadata"`
}

StatisticsFile represents a statistics file in the Puffin format, that can be used to read table data more efficiently.

Statistics are informational. A reader can choose to ignore statistics information. Statistics support is not required to read the table correctly.

type Summary 

type Summary struct {
	Operation  Operation
	Properties iceberg.Properties
}

Summary stores the summary information for a snapshot indicating the operation that created the snapshot, and various properties which might exist in the summary.

func (*Summary) Equals 

func (s *Summary) Equals(other *Summary) bool

func (*Summary) MarshalJSON 

func (s *Summary) MarshalJSON() ([]byte, error)

func (*Summary) String 

func (s *Summary) String() string

func (*Summary) UnmarshalJSON 

func (s *Summary) UnmarshalJSON(b []byte) (err error)

type Table 

type Table struct {
	// contains filtered or unexported fields
}

func New 

func New(ident Identifier, meta Metadata, metadataLocation string, fsF FSysF, cat CatalogIO, opts ...Option) *Table

New constructs a Table. If cat implements ScanPlanner — as rest.Catalog does for servers that support remote scan planning — it is wired as the table's planner so (*Scan).PlanFiles can delegate to it; catalogs that do not implement ScanPlanner leave planner nil and planning stays local. This is the concrete Catalog -> Table -> Scan wiring for #1178: the catalog already satisfies ScanPlanner, so no catalog accessor is needed.

func NewFromLocation 

func NewFromLocation(
	ctx context.Context,
	ident Identifier,
	metalocation string,
	fsysF FSysF,
	cat CatalogIO,
	opts ...Option,
) (_ *Table, err error)

func (Table) AllManifests 

func (t Table) AllManifests(ctx context.Context) iter.Seq2[iceberg.ManifestFile, error]

func (Table) Append 

func (t Table) Append(ctx context.Context, rdr array.RecordReader, snapshotProps iceberg.Properties) (*Table, error)

Append is a shortcut for NewTransaction().Append() and then committing the transaction

func (Table) AppendTable 

func (t Table) AppendTable(ctx context.Context, tbl arrow.Table, batchSize int64, snapshotProps iceberg.Properties) (*Table, error)

AppendTable is a shortcut for NewTransaction().AppendTable() and then committing the transaction

func (Table) CurrentSnapshot 

func (t Table) CurrentSnapshot() *Snapshot

func (Table) Delete 

func (t Table) Delete(ctx context.Context, filter iceberg.BooleanExpression, snapshotProps iceberg.Properties, opts ...DeleteOption) (*Table, error)

Delete is a shortcut for NewTransaction().Delete() and then committing the transaction.

The provided filter acts as a row-level predicate on existing data:

  • Files where all rows match the filter (strict match) are completely deleted
  • Files where some rows match and others don't (partial match) are rewritten to keep only non-matching rows
  • Files where no rows match the filter are kept unchanged

The filter uses both inclusive and strict metrics evaluators on file statistics to classify files:

  • Inclusive evaluator identifies candidate files that may contain matching rows
  • Strict evaluator determines if all rows in a file must match the filter
  • Files that pass inclusive but not strict evaluation are rewritten with filtered data

The concurrency parameter controls the level of parallelism for manifest processing and file rewriting and can be overridden using the WithOverwriteConcurrency option. Defaults to runtime.GOMAXPROCS(0).

func (Table) DeleteOrphanFiles 

func (t Table) DeleteOrphanFiles(ctx context.Context, opts ...OrphanCleanupOption) (OrphanCleanupResult, error)

DeleteOrphanFiles identifies files under a table location that are no longer referenced by table metadata and deletes them unless dry-run is enabled.

The table filesystem must implement iceio.ListableIO so orphan cleanup can fully enumerate candidate files before deciding what is safe to delete.

func (Table) Equals 

func (t Table) Equals(other Table) bool

func (Table) FS 

func (t Table) FS(ctx context.Context) (icebergio.IO, error)

func (Table) Identifier 

func (t Table) Identifier() Identifier

func (Table) Inspect 

func (t Table) Inspect(opts ...InspectOption) InspectTable

Inspect returns an InspectTable for reading this table's metadata tables, allocating Arrow buffers from opts, if provided, otherwise the default allocator.

func (Table) Location 

func (t Table) Location() string

func (Table) LocationProvider 

func (t Table) LocationProvider() (LocationProvider, error)

func (Table) Metadata 

func (t Table) Metadata() Metadata

func (Table) MetadataLocation 

func (t Table) MetadataLocation() string

func (Table) MetricsReporter 

func (t Table) MetricsReporter() metrics.Reporter

MetricsReporter returns the table's metrics reporter, never nil.

func (Table) NameMapping 

func (t Table) NameMapping() iceberg.NameMapping

func (Table) NewTransaction 

func (t Table) NewTransaction() *Transaction

func (Table) NewTransactionOnBranch 

func (t Table) NewTransactionOnBranch(branch string) *Transaction

NewTransactionOnBranch creates a new transaction that commits to the named branch. Use [NewTransaction] to commit to the default "main" branch.

func (Table) NewTransactionOnBranchWithError 

func (t Table) NewTransactionOnBranchWithError(branch string) (*Transaction, error)

NewTransactionOnBranchWithError creates a new transaction and returns any metadata initialization error that prevents builder construction.

This preserves the old non-failing constructor contract while allowing callers to receive the precise initialization error instead of hitting panic/undefined behavior later.

func (Table) Overwrite 

func (t Table) Overwrite(ctx context.Context, rdr array.RecordReader, snapshotProps iceberg.Properties, opts ...OverwriteOption) (*Table, error)

Overwrite is a shortcut for NewTransaction().Overwrite() and then committing the transaction.

An optional filter (see WithOverwriteFilter) determines which existing data to delete or rewrite:

  • If filter is nil or AlwaysTrue, all existing data files are deleted and replaced with new data.
  • If a filter is provided, it acts as a row-level predicate on existing data:
  • Files where all rows match the filter (strict match) are completely deleted
  • Files where some rows match and others don't (partial match) are rewritten to keep only non-matching rows
  • Files where no rows match the filter are kept unchanged

The filter uses both inclusive and strict metrics evaluators on file statistics to classify files:

  • Inclusive evaluator identifies candidate files that may contain matching rows
  • Strict evaluator determines if all rows in a file must match the filter
  • Files that pass inclusive but not strict evaluation are rewritten with filtered data

New data from the provided RecordReader is written to the table regardless of the filter.

The concurrency parameter controls the level of parallelism for manifest processing and file rewriting and can be overridden using the WithOverwriteConcurrency option. Defaults to runtime.GOMAXPROCS(0).

func (Table) OverwriteTable 

func (t Table) OverwriteTable(ctx context.Context, tbl arrow.Table, batchSize int64, snapshotProps iceberg.Properties, opts ...OverwriteOption) (*Table, error)

OverwriteTable is a shortcut for NewTransaction().OverwriteTable() and then committing the transaction.

An optional filter (see WithOverwriteFilter) determines which existing data to delete or rewrite:

  • If filter is nil or AlwaysTrue, all existing data files are deleted and replaced with new data.
  • If a filter is provided, it acts as a row-level predicate on existing data:
  • Files where all rows match the filter (strict match) are completely deleted
  • Files where some rows match and others don't (partial match) are rewritten to keep only non-matching rows
  • Files where no rows match the filter are kept unchanged

The filter uses both inclusive and strict metrics evaluators on file statistics to classify files:

  • Inclusive evaluator identifies candidate files that may contain matching rows
  • Strict evaluator determines if all rows in a file must match the filter
  • Files that pass inclusive but not strict evaluation are rewritten with filtered data

New data from the provided table is written to the table regardless of the filter.

The batchSize parameter refers to the batch size for reading the input data, not the batch size for writes. The concurrency parameter controls the level of parallelism for manifest processing and file rewriting and can be overridden using the WithOverwriteConcurrency option. Defaults to runtime.GOMAXPROCS(0).

func (Table) Properties 

func (t Table) Properties() iceberg.Properties

func (Table) PurgeFiles 

func (t Table) PurgeFiles(ctx context.Context) error

PurgeFiles physically deletes all files under the table's warehouse location and any referenced files written outside the location root (e.g., via write.data.path or write.metadata.path properties).

It operates on a best-effort basis. Errors from individual file deletions are collected and returned together. If files cannot be deleted (e.g. due to permission errors or missing paths), the errors are logged but the overall catalog drop operation should typically proceed so the catalog does not get out of sync with storage.

func (*Table) Refresh 

func (t *Table) Refresh(ctx context.Context) error

func (Table) Scan 

func (t Table) Scan(opts ...ScanOption) *Scan

func (Table) Schema 

func (t Table) Schema() *iceberg.Schema

func (Table) Schemas 

func (t Table) Schemas() map[int]*iceberg.Schema

func (Table) SnapshotAsOf 

func (t Table) SnapshotAsOf(timestampMs int64, inclusive bool) *Snapshot

SnapshotAsOf finds the snapshot that was current as of or right before the given timestamp.

func (Table) SnapshotByID 

func (t Table) SnapshotByID(id int64) *Snapshot

func (Table) SnapshotByName 

func (t Table) SnapshotByName(name string) *Snapshot

func (Table) SortOrder 

func (t Table) SortOrder() SortOrder

func (Table) Spec 

func (t Table) Spec() iceberg.PartitionSpec

type TableCommit 

type TableCommit struct {
	Identifier   Identifier
	Requirements []Requirement
	Updates      []Update
}

TableCommit holds the identifier, requirements, and updates for a single table within a multi-table transaction. It is used with [catalog.TransactionalCatalog.CommitTransaction] to atomically commit changes across multiple tables.

type Transaction 

type Transaction struct {
	// contains filtered or unexported fields
}

func (*Transaction) AddDataFiles 

func (t *Transaction) AddDataFiles(ctx context.Context, dataFiles []iceberg.DataFile, snapshotProps iceberg.Properties, opts ...WriteOption) error

AddDataFiles adds pre-built DataFiles to the table without scanning them from storage. This is useful for clients who have already constructed DataFile objects with metadata, avoiding the need to read files to extract schema and statistics.

Unlike AddFiles, this method does not read files from storage. It validates only metadata that can be checked without opening files (for example spec-id and partition field IDs).

By default this method automatically sets the schema name mapping in table properties if one does not already exist. Pass WithoutAutoNameMapping to disable this behavior, for example when working with catalogs that reject the name mapping property.

Callers are responsible for ensuring each DataFile is valid and consistent with the table. Supplying incorrect DataFile metadata can produce an invalid snapshot and break reads.

func (*Transaction) AddFiles 

func (t *Transaction) AddFiles(ctx context.Context, filePaths []string, snapshotProps iceberg.Properties, ignoreDuplicates bool, opts ...AddFilesOption) error

func (*Transaction) Append 

func (t *Transaction) Append(ctx context.Context, rdr array.RecordReader, snapshotProps iceberg.Properties) error

func (*Transaction) AppendTable 

func (t *Transaction) AppendTable(ctx context.Context, tbl arrow.Table, batchSize int64, snapshotProps iceberg.Properties) error

func (*Transaction) Commit 

func (t *Transaction) Commit(ctx context.Context) (*Table, error)

func (*Transaction) Delete 

func (t *Transaction) Delete(ctx context.Context, filter iceberg.BooleanExpression, snapshotProps iceberg.Properties, opts ...DeleteOption) (err error)

Delete deletes records matching the provided filter.

The provided filter acts as a row-level predicate on existing data:

  • Files where all rows match the filter (strict match) are completely deleted
  • Files where some rows match and others don't (partial match) are rewritten to keep only non-matching rows
  • Files where no rows match the filter are kept unchanged

The filter uses both inclusive and strict metrics evaluators on file statistics to classify files:

  • Inclusive evaluator identifies candidate files that may contain matching rows
  • Strict evaluator determines if all rows in a file must match the filter
  • Files that pass inclusive but not strict evaluation are rewritten with filtered data

The concurrency parameter controls the level of parallelism for manifest processing and file rewriting and can be overridden using the WithOverwriteConcurrency option. Defaults to runtime.GOMAXPROCS(0).

func (*Transaction) ExpireSnapshots 

func (t *Transaction) ExpireSnapshots(opts ...ExpireSnapshotsOpt) error

ExpireSnapshots removes expired snapshots from the table metadata, staging the changes on the transaction. Call Transaction.Commit to persist them.

A snapshot is retained when it is referenced by a branch or tag, or when it is needed to satisfy the retention rules. Retention is resolved per ref, with reference age falling back through the ref's max-ref-age-ms, the table's MaxRefAgeMsKey property, and the specification default. Snapshot age falls back through the ref's own settings, the options passed here, and finally the table's MinSnapshotsToKeepKey and MaxSnapshotAgeMsKey properties. The current snapshot of the main branch is always kept.

By default the now-unreferenced manifests, manifest lists, and data files are deleted once the commit lands; pass WithPostCommit(false) to defer that cleanup to a separate maintenance job and avoid racing in-flight readers. 

txn := tbl.NewTransaction()
err := txn.ExpireSnapshots(
	table.WithOlderThan(7*24*time.Hour),
	table.WithRetainLast(10),
)
if err != nil {
	// ...
}
newTbl, err := txn.Commit(ctx)

The "iceberg expire-snapshots" CLI command wraps the same operation.

func (*Transaction) MarkCommitted 

func (t *Transaction) MarkCommitted()

MarkCommitted marks the transaction as committed, preventing further use. This should be called after a successful multi-table commit via [catalog.TransactionalCatalog.CommitTransaction].

func (*Transaction) NewRewrite 

func (t *Transaction) NewRewrite(snapshotProps iceberg.Properties) *RewriteFiles

NewRewrite returns a RewriteFiles builder bound to this transaction. Mirrors Java's org.apache.iceberg.Table#newRewrite. snapshotProps is cloned and the clone is added to the rewrite snapshot's summary; pass nil for none.

Usage: 

rewrite := tx.NewRewrite(nil)
rewrite.DeleteFile(oldDataFile)
rewrite.AddDataFile(newDataFile)
if err := rewrite.Commit(ctx); err != nil { ... }
committed, err := tx.Commit(ctx)

func (*Transaction) NewRowDelta 

func (t *Transaction) NewRowDelta(snapshotProps iceberg.Properties) *RowDelta

NewRowDelta creates a new RowDelta for committing row-level changes within this transaction. The provided properties are included in the snapshot summary.

func (*Transaction) Overwrite 

func (t *Transaction) Overwrite(ctx context.Context, rdr array.RecordReader, snapshotProps iceberg.Properties, opts ...OverwriteOption) error

Overwrite overwrites the table data using a RecordReader.

An optional filter (see WithOverwriteFilter) determines which existing data to delete or rewrite:

  • If filter is nil or AlwaysTrue, all existing data files are deleted and replaced with new data.
  • If a filter is provided, it acts as a row-level predicate on existing data:
  • Files where all rows match the filter (strict match) are completely deleted
  • Files where some rows match and others don't (partial match) are rewritten to keep only non-matching rows
  • Files where no rows match the filter are kept unchanged

The filter uses both inclusive and strict metrics evaluators on file statistics to classify files:

  • Inclusive evaluator identifies candidate files that may contain matching rows
  • Strict evaluator determines if all rows in a file must match the filter
  • Files that pass inclusive but not strict evaluation are rewritten with filtered data

New data from the provided RecordReader is written to the table regardless of the filter.

The concurrency parameter controls the level of parallelism for manifest processing and file rewriting and can be overridden using the WithOverwriteConcurrency option. If concurrency <= 0, defaults to runtime.GOMAXPROCS(0).

func (*Transaction) OverwriteTable 

func (t *Transaction) OverwriteTable(ctx context.Context, tbl arrow.Table, batchSize int64, snapshotProps iceberg.Properties, opts ...OverwriteOption) error

OverwriteTable overwrites the table data using an Arrow Table.

An optional filter (see WithOverwriteFilter) determines which existing data to delete or rewrite:

  • If filter is nil or AlwaysTrue, all existing data files are deleted and replaced with new data.
  • If a filter is provided, it acts as a row-level predicate on existing data:
  • Files where all rows match the filter (strict match) are completely deleted
  • Files where some rows match and others don't (partial match) are rewritten to keep only non-matching rows
  • Files where no rows match the filter are kept unchanged

The filter uses both inclusive and strict metrics evaluators on file statistics to classify files:

  • Inclusive evaluator identifies candidate files that may contain matching rows
  • Strict evaluator determines if all rows in a file must match the filter
  • Files that pass inclusive but not strict evaluation are rewritten with filtered data

New data from the provided table is written to the table regardless of the filter.

The batchSize parameter refers to the batch size for reading the input data, not the batch size for writes. The concurrency parameter controls the level of parallelism for manifest processing and file rewriting and can be overridden using the WithOverwriteConcurrency option. If concurrency <= 0, defaults to runtime.GOMAXPROCS(0).

func (*Transaction) ReplaceDataFiles 

func (t *Transaction) ReplaceDataFiles(ctx context.Context, filesToDelete, filesToAdd []string, snapshotProps iceberg.Properties) error

ReplaceFiles is actually just an overwrite operation with multiple files deleted and added.

TODO: technically, this could be a REPLACE operation but we aren't performing any validation here that there are no changes to the underlying data. A REPLACE operation is only valid if the data is exactly the same as the previous snapshot.

For now, we'll keep using an overwrite operation.

func (*Transaction) ReplaceDataFilesWithDataFiles 

func (t *Transaction) ReplaceDataFilesWithDataFiles(ctx context.Context, filesToDelete, filesToAdd []iceberg.DataFile, snapshotProps iceberg.Properties, opts ...WriteOption) error

ReplaceDataFilesWithDataFiles replaces files using pre-built DataFile objects. This avoids scanning files to extract schema and statistics - the caller provides DataFile objects directly with all required metadata.

For the files to add, use iceberg.NewDataFileBuilder to construct DataFile objects with the appropriate metadata (path, record count, file size, partition values).

This method does not open files. It validates only metadata that can be checked without reading file contents.

By default this method automatically sets the schema name mapping in table properties if one does not already exist. Pass WithoutAutoNameMapping to disable this behavior, for example when working with catalogs that reject the name mapping property.

Callers are responsible for ensuring each DataFile is valid and consistent with the table. Supplying incorrect DataFile metadata can produce an invalid snapshot and break reads.

This is useful when:

  • Files are written via a separate I/O path and metadata is already known
  • Avoiding file scanning improves performance or reliability
  • Working with storage systems where immediate file reads may be unreliable

func (*Transaction) ReplaceFiles 

func (t *Transaction) ReplaceFiles(ctx context.Context, dataFilesToDelete, dataFilesToAdd, deleteFilesToRemove []iceberg.DataFile, snapshotProps iceberg.Properties, opts ...WriteOption) error

ReplaceFiles atomically replaces data files and removes associated delete files in a single snapshot. This is the commit primitive for compaction: old data files are replaced with new (compacted) data files, and delete files that are fully applied are removed.

func (*Transaction) RewriteDataFiles 

func (t *Transaction) RewriteDataFiles(ctx context.Context, groups []CompactionTaskGroup, opts RewriteDataFilesOptions) (*RewriteResult, error)

RewriteDataFiles compacts the given groups by reading data with deletes applied, writing new consolidated files, and atomically replacing the old files. Position delete files that are fully applied (every referenced data file is in the rewrite set) are removed automatically.

Cleanup beyond that per-group staging is the caller's responsibility: compute the dead sets with [compaction.CollectDeadEqualityDeletes] and [compaction.CollectDeadPositionDeletes] (against the same snapshot the rewrite is staged on) and pass them via RewriteDataFilesOptions.ExtraDeleteFilesToRemove. The executor only orchestrates the commit; it does not impose a cleanup policy. This split keeps the pure spec predicate in table/compaction and the unexported snapshot machinery in table.

Use [compaction.Config.PlanCompaction] to produce the groups, then convert [compaction.Group] → CompactionTaskGroup and pass them here. Distributed coordinators stage worker results via ExecuteCompactionGroup and commit them via Transaction.NewRewrite + RewriteFiles.ApplyResult + RewriteFiles.Commit instead.

func (*Transaction) RewriteManifests 

func (t *Transaction) RewriteManifests(ctx context.Context, opts ...RewriteManifestsOpt) (*RewriteManifestsResult, error)

RewriteManifests merges small data manifests in the current snapshot into fewer, target-sized ones and stages the result as a REPLACE snapshot. It rewrites metadata only; no data files are read or written. Delete manifests are left untouched.

Manifests are clustered by size only (bin-packed toward the target size); clustering by partition or sort key, which Java exposes via clusterBy, is a future extension.

On a V3 table each rewrite advances next-row-id by the eligible manifests' row count even though no rows are written, so running it on a cadence steadily consumes row-ID space.

A no-op result (IsNoOp) means there was nothing to do — either the table has no current snapshot (NoOpNoSnapshot) or the eligible manifests are already optimal (NoOpAlreadyOptimal). A no-op writes no manifest list and stages nothing on the transaction, so a following Commit is a true no-op; callers can skip it either way.

func (*Transaction) RollbackToSnapshot 

func (t *Transaction) RollbackToSnapshot(snapshotID int64) error

func (*Transaction) Scan 

func (t *Transaction) Scan(opts ...ScanOption) (*Scan, error)

func (*Transaction) SetProperties 

func (t *Transaction) SetProperties(props iceberg.Properties) error

func (*Transaction) StagedTable 

func (t *Transaction) StagedTable() (*StagedTable, error)

func (*Transaction) TableCommit 

func (t *Transaction) TableCommit() (TableCommit, error)

TableCommit returns a TableCommit representing the pending changes in this transaction without actually committing them. This is intended for multi-table transactions where several TableCommit values are collected and submitted together via [catalog.TransactionalCatalog.CommitTransaction].

Most callers should use [catalog.MultiTableTransaction] instead of calling this method directly — it handles extraction, commit, and lifecycle management automatically.

The method automatically includes an AssertTableUUID requirement, matching the behavior of Transaction.Commit.

TableCommit does not mark the transaction as committed — the caller is responsible for either calling Commit (single-table) or submitting the returned TableCommit via CommitTransaction (multi-table). After a successful multi-table commit the caller should call MarkCommitted to prevent accidental reuse.

PostCommit hooks are NOT executed by this method. Because the multi-table commit endpoint returns 204 No Content (no metadata), callers must LoadTable after a successful CommitTransaction if they need updated state.

func (*Transaction) UpdateSchema 

func (t *Transaction) UpdateSchema(caseSensitive bool, allowIncompatibleChanges bool, opts ...UpdateSchemaOption) *UpdateSchema

UpdateSchema creates a new UpdateSchema instance for managing schema changes within this transaction.

Parameters:

  • caseSensitive: If true, field name lookups are case-sensitive; if false, field names are matched case-insensitively.
  • allowIncompatibleChanges: If true, allows schema changes that would normally be rejected for being incompatible (e.g., adding required fields without default values, changing field types in non-promotable ways, or changing column nullability from optional to required).
  • opts: Optional configuration functions to customize the UpdateSchema behavior.

Returns an UpdateSchema instance that can be used to build and apply schema changes.

func (*Transaction) UpdateSpec 

func (t *Transaction) UpdateSpec(caseSensitive bool) *UpdateSpec

func (*Transaction) UpgradeFormatVersion 

func (t *Transaction) UpgradeFormatVersion(version int) error

UpgradeFormatVersion upgrades the table to the given format version. Downgrading is not allowed. If the table is already at the given version, this is a no-op.

func (*Transaction) WriteEqualityDeletes 

func (t *Transaction) WriteEqualityDeletes(ctx context.Context, equalityFieldIDs []int, records iter.Seq2[arrow.RecordBatch, error]) ([]iceberg.DataFile, error)

WriteEqualityDeletes writes Arrow record batches as equality delete Parquet files and returns the resulting DataFiles. The returned files have ContentType == EntryContentEqDeletes and EqualityFieldIDs set, ready to be passed to RowDelta.AddDeletes.

The equalityFieldIDs identify which columns in the table schema form the delete key. The provided records must contain exactly those columns.

The table must use format version 2 or higher.

For partitioned tables, the provided records must include the partition source columns in addition to the equality key columns so that records can be routed to the correct partition directories. If the partition source columns overlap with the equality key columns, no extra columns are needed.

Usage: 

deleteFiles, err := tx.WriteEqualityDeletes(ctx, []int{1, 2}, records)
rd := tx.NewRowDelta(nil)
rd.AddDeletes(deleteFiles...)
err = rd.Commit(ctx)

type UnsupportedType 

type UnsupportedType struct {
	MinFormatVersion int
}

type Update 

type Update interface {
	// Action returns the name of the action that the update represents.
	Action() string
	// Apply applies the update to the given metadata builder.
	Apply(*MetadataBuilder) error
	// PostCommit is called after successful commit of the update
	PostCommit(context.Context, *Table, *Table) error
}

Update represents a change to a table's metadata.

func NewSetLocationUpdate 

func NewSetLocationUpdate(loc string) Update

NewSetLocationUpdate creates a new update that sets the location of the table metadata.

type UpdateSchema 

type UpdateSchema struct {
	// contains filtered or unexported fields
}

UpdateSchema manages schema evolution operations within a transaction. It supports adding, deleting, renaming, updating, and reordering columns, and ensures all changes are validated before being committed.

Operations can be chained together and are applied in the order they are called. Changes are not persisted until Commit() is called.

Basic Usage: 

txn := table.NewTransaction()
updateSchema := txn.UpdateSchema(true, false)

// Add a new column
updateSchema.AddColumn([]string{"email"}, iceberg.PrimitiveTypes.String, "Email address", false, nil)

// Commit changes
if err := updateSchema.Commit(); err != nil {
    return err
}
if _, err := txn.Commit(ctx); err != nil {
    return err
}

Chaining Operations: 

updateSchema.
    AddColumn([]string{"age"}, iceberg.PrimitiveTypes.Int, "User age", false, nil).
    RenameColumn([]string{"name"}, "full_name").
    MoveFirst([]string{"id"}).
    Commit()

Adding Nested Columns: 

// Add a column to a struct field
updateSchema.AddColumn([]string{"address", "country"}, iceberg.PrimitiveTypes.String, "Country code", false, iceberg.StringLiteral("US"))

// Commit the schema update
if err := updateSchema.Commit(); err != nil {
    return err
}
if _, err := txn.Commit(ctx); err != nil {
    return err
}

func NewUpdateSchema 

func NewUpdateSchema(txn *Transaction, caseSensitive bool, allowIncompatibleChanges bool, opts ...UpdateSchemaOption) *UpdateSchema

NewUpdateSchema creates a new UpdateSchema instance for managing schema changes within a transaction.

Parameters:

  • txn: The transaction that this schema update will be applied to.
  • caseSensitive: If true, field name lookups are case-sensitive; if false, field names are matched case-insensitively.
  • allowIncompatibleChanges: If true, allows schema changes that would normally be rejected for being incompatible (e.g., adding required fields without default values, changing field types in non-promotable ways, or changing column nullability from optional to required).
  • opts: Optional configuration functions to customize the UpdateSchema behavior.

Returns an UpdateSchema instance that can be used to build and apply schema changes.

func (*UpdateSchema) AddColumn 

func (u *UpdateSchema) AddColumn(path []string, fieldType iceberg.Type, doc string, required bool, defaultValue iceberg.Literal) *UpdateSchema

func (*UpdateSchema) Apply 

func (u *UpdateSchema) Apply() (*iceberg.Schema, error)

func (*UpdateSchema) BuildUpdates 

func (u *UpdateSchema) BuildUpdates() ([]Update, []Requirement, error)

func (*UpdateSchema) Commit 

func (u *UpdateSchema) Commit() error

func (*UpdateSchema) DeleteColumn 

func (u *UpdateSchema) DeleteColumn(path []string) *UpdateSchema

func (*UpdateSchema) MoveAfter 

func (u *UpdateSchema) MoveAfter(path, relativeTo []string) *UpdateSchema

func (*UpdateSchema) MoveBefore 

func (u *UpdateSchema) MoveBefore(path, relativeTo []string) *UpdateSchema

func (*UpdateSchema) MoveColumn 

func (u *UpdateSchema) MoveColumn(op MoveOp, path, relativeTo []string) *UpdateSchema

func (*UpdateSchema) MoveFirst 

func (u *UpdateSchema) MoveFirst(path []string) *UpdateSchema

func (*UpdateSchema) RenameColumn 

func (u *UpdateSchema) RenameColumn(path []string, newName string) *UpdateSchema

func (*UpdateSchema) SetIdentifierField 

func (u *UpdateSchema) SetIdentifierField(paths [][]string) *UpdateSchema

func (*UpdateSchema) UpdateColumn 

func (u *UpdateSchema) UpdateColumn(path []string, update ColumnUpdate) *UpdateSchema

type UpdateSchemaOption 

type UpdateSchemaOption func(*UpdateSchema)

UpdateSchemaOption is a functional option for configuring UpdateSchema.

func WithNameMapping 

func WithNameMapping(nameMapping iceberg.NameMapping) UpdateSchemaOption

WithNameMapping configures the UpdateSchema to use the provided name mapping for tracking field name changes and ensuring consistency during schema evolution.

type UpdateSpec 

type UpdateSpec struct {
	// contains filtered or unexported fields
}

UpdateSpec implements a builder for evolving a table's partition specification.

It accumulates a sequence of partition spec update operations (e.g., AddField, RemoveField, RenameField) which are applied during BuildUpdates.

Use the builder methods to chain operations, and call BuildUpdates to apply them and produce the final set of partition fields and update requirements, or call Commit to apply the updates in the transaction.

func NewUpdateSpec 

func NewUpdateSpec(t *Transaction, caseSensitive bool) *UpdateSpec

func (*UpdateSpec) AddField 

func (us *UpdateSpec) AddField(sourceColName string, transform iceberg.Transform, partitionFieldName string) *UpdateSpec

func (*UpdateSpec) AddIdentity 

func (us *UpdateSpec) AddIdentity(sourceColName string) *UpdateSpec

func (*UpdateSpec) Apply 

func (us *UpdateSpec) Apply() (iceberg.PartitionSpec, error)

func (*UpdateSpec) BuildUpdates 

func (us *UpdateSpec) BuildUpdates() ([]Update, []Requirement, error)

func (*UpdateSpec) Commit 

func (us *UpdateSpec) Commit() error

func (*UpdateSpec) RemoveField 

func (us *UpdateSpec) RemoveField(name string) *UpdateSpec

func (*UpdateSpec) RenameField 

func (us *UpdateSpec) RenameField(name string, newName string) *UpdateSpec

type Updates 

type Updates []Update

func (*Updates) UnmarshalJSON 

func (u *Updates) UnmarshalJSON(data []byte) error

type WriteOption 

type WriteOption func(*dataFileCfg)

WriteOption is an option for methods that operate on pre-built DataFile objects.

func WithoutAutoNameMapping 

func WithoutAutoNameMapping() WriteOption

WithoutAutoNameMapping disables the automatic setting of the schema name mapping in table properties. By default, methods like Transaction.AddDataFiles and Transaction.ReplaceDataFilesWithDataFiles will set the name mapping if one does not already exist. This option is useful when working with catalogs (such as Databricks Unity Catalog) that reject the name mapping property.

func WithoutDuplicateCheck 

func WithoutDuplicateCheck() WriteOption

WithoutDuplicateCheck disables the duplicate file path check against existing data files in the current snapshot. By default, Transaction.AddDataFiles scans all manifests to ensure no file being added already exists in the table. For tables with many manifests this scan can be expensive because each manifest must be read from storage. Use this option when the caller can guarantee that the files being added are not already in the table.

type WriteRecordOption 

type WriteRecordOption func(*writeRecordConfig)

WriteRecordOption configures the behavior of WriteRecords.

func WithClusteredWrite 

func WithClusteredWrite() WriteRecordOption

WithClusteredWrite enables the memory-efficient clustered write path for partitioned tables. It keeps at most one partition writer open at a time: when a record arrives for a new partition, the current writer is flushed and closed before a new one is opened.

The input must be clustered by partition across batches: once a partition's writer has been closed, encountering further records for that partition returns an error. Within a single batch the writer reclusters rows by partition, so interleaved values like [a,b,a,b] are accepted; the strict check fires only across batch boundaries. This is the natural order for compaction, where each source data file typically belongs to a single partition. If the input is not clustered across batches, use the fanout writer (the default) instead.

Combining this option with WithMaxWriteWorkers is rejected by WriteRecords: the clustered path is single-threaded by design.

func WithMaxWriteWorkers 

func WithMaxWriteWorkers(n int) WriteRecordOption

WithMaxWriteWorkers overrides the default number of fanout workers used for partitioned writes. Each worker processes record batches, partitions them, and writes to the appropriate partition files. Fewer workers means fewer concurrent parquet writers compressing pages simultaneously, which reduces peak memory. A value of 0 (the default) uses config.EnvConfig.MaxWorkers.

Combining this option with WithClusteredWrite is rejected by WriteRecords: the clustered write path is single-threaded by design, so the two options have no meaningful interaction.

func WithPreserveRowLineage 

func WithPreserveRowLineage(schema *iceberg.Schema) WriteRecordOption

WithPreserveRowLineage sets the output file schema to include the v3 row- lineage metadata columns (_row_id, _last_updated_sequence_number) so that row identity is preserved through rewrites and compactions. The input records must already carry _row_id (e.g. from a scan that projected the lineage columns).

WriteRecords validates this option against the table state and the input Arrow schema: it errors when applied to a v1/v2 table or when the input records don't include the _row_id column. The schema parameter is the projected Iceberg schema (typically iceberg.SchemaWithRowLineage) and is used to write the output Parquet's field IDs.

func WithTargetFileSize 

func WithTargetFileSize(size int64) WriteRecordOption

WithTargetFileSize overrides the table's default target file size.

func WithWriteUUID 

func WithWriteUUID(id uuid.UUID) WriteRecordOption

WithWriteUUID sets a specific UUID for file naming.

type WriteTask 

type WriteTask struct {
	Uuid        uuid.UUID
	ID          int
	PartitionID int // PartitionID is the partition identifier used in data file naming.
	FileCount   int // FileCount is a sequential counter for files written by this task.
	Schema      *iceberg.Schema
	Batches     []arrow.RecordBatch
	// SortOrderID claims Batches are globally sorted by that order; writeFile
	// records it unverified. Must stay zero for position deletes.
	SortOrderID int
}

WriteTask writes all its Batches into one file. The rolling writer bypasses it, naming files via dataFileName directly.

func (WriteTask) GenerateDataFileName 

func (w WriteTask) GenerateDataFileName(extension string) string

Source Files

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Directories

Path Synopsis
Package compaction provides bin-pack compaction planning for Iceberg tables.
 Package compaction provides bin-pack compaction planning for Iceberg tables.

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