rdblue commented on code in PR #18853:
URL: https://github.com/apache/iceberg/pull/18853#discussion_r4529989679
##########
core/src/main/java/org/apache/iceberg/V4Metadata.java:
##########
@@ -541,4 +545,576 @@ public Long pos() {
return null;
}
}
+
+ /** Base wrapper used to write a {@link TrackedFile} using the v4 tracked
file schema. */
+ private abstract static class TrackedFileWrapper implements StructLike {
+ private static final int SIZE =
+ TrackedFile.schema(Types.StructType.of(),
Types.StructType.of()).columns().size();
+
+ private final Map<Integer, PartitionSpec> specsById;
+ private final Map<Integer, StructProjection> partitionProjections;
+ private final ContentStatsWrapper contentStats;
+ private final DeletionVectorWrapper deletionVector = new
DeletionVectorWrapper();
+ private final TrackingWrapper tracking;
+ private final ManifestInfoWrapper manifestInfo;
+
+ private TrackedFile wrapped = null;
+ private Integer specId = null;
+
+ private TrackedFileWrapper(
+ Map<Integer, PartitionSpec> specsById,
+ Types.StructType partitionType,
+ Types.StructType contentStatsType,
+ TrackingWrapper tracking,
+ ManifestInfoWrapper manifestInfo) {
+ this.specsById = specsById;
+ this.partitionProjections = partitionProjections(specsById.values(),
partitionType);
+ this.contentStats = new ContentStatsWrapper(contentStatsType);
+ this.tracking = tracking;
+ this.manifestInfo = manifestInfo;
+ }
+
+ protected void wrapInternal(TrackedFile file, Tracking newTracking, Long
assignedFirstRowId) {
+ if (file.contentType() == FileContent.DATA) {
+ Preconditions.checkArgument(
+ file.manifestInfo() == null,
+ "Invalid data file, manifest info must be null: %s",
+ file.location());
+ } else {
+ Preconditions.checkArgument(
+ file.manifestInfo() != null,
+ "Invalid manifest, missing manifest info: %s",
+ file.location());
+ }
+
+ // null sequence numbers are inherited from the commit: ADDED entries
inherit both and
+ // MODIFIED entries inherit only the data sequence number
+ EntryStatus status = newTracking.status();
+ Preconditions.checkState(
+ newTracking.dataSequenceNumber() != null
+ || status == EntryStatus.ADDED
+ || status == EntryStatus.MODIFIED,
+ "Cannot write null data sequence number for status %s (must be ADDED
or MODIFIED): %s",
+ status,
+ file.location());
+ Preconditions.checkState(
+ newTracking.fileSequenceNumber() != null || status ==
EntryStatus.ADDED,
+ "Cannot write null file sequence number for status %s (must be
ADDED): %s",
+ status,
+ file.location());
+
+ Integer fileSpecId = file.specId();
+ PartitionSpec spec = fileSpecId != null ? specsById.get(fileSpecId) :
null;
+ Preconditions.checkArgument(
+ fileSpecId == null || spec != null,
+ "Cannot find partition spec for spec ID: %s",
+ fileSpecId);
+
+ this.wrapped = file;
+ // v4 metadata stores a null spec ID and partition for unpartitioned
files
+ this.specId = spec != null && !spec.isUnpartitioned() ? fileSpecId :
null;
+ tracking.wrap(file, newTracking, assignedFirstRowId);
+ }
+
+ @Override
+ public int size() {
+ return SIZE;
+ }
+
+ @Override
+ public <T> void set(int pos, T value) {
+ throw new UnsupportedOperationException("Cannot modify
TrackedFileWrapper wrapper via set");
+ }
+
+ @Override
+ public <T> T get(int pos, Class<T> javaClass) {
+ return javaClass.cast(get(pos));
+ }
+
+ private Object get(int pos) {
+ return switch (pos) {
+ case 0 -> tracking;
+ case 1 -> wrapped.contentType().id();
+ case 2 -> wrapped.location();
+ case 3 -> wrapped.fileFormat().toString();
+ case 4 -> wrapped.recordCount();
+ case 5 -> wrapped.fileSizeInBytes();
+ case 6 -> specId;
+ case 7 -> unionPartition();
+ case 8 -> wrapped.contentStats() != null ?
contentStats.wrap(wrapped.contentStats()) : null;
+ case 9 -> wrapped.sortOrderId();
+ case 10 ->
+ wrapped.deletionVector() != null ?
deletionVector.wrap(wrapped.deletionVector()) : null;
+ case 11 ->
+ wrapped.manifestInfo() != null ?
manifestInfo.wrap(wrapped.manifestInfo()) : null;
+ case 12 -> wrapped.keyMetadata();
+ case 13 -> wrapped.splitOffsets();
+ case 14 -> wrapColumnFiles(wrapped.columnFiles());
+ default -> throw new UnsupportedOperationException("Unknown field
ordinal: " + pos);
+ };
+ }
+
+ private static List<StructLike> wrapColumnFiles(List<ColumnFile>
columnFiles) {
+ if (columnFiles == null) {
+ return null;
+ }
+
+ List<StructLike> wrappers =
Lists.newArrayListWithCapacity(columnFiles.size());
+ for (ColumnFile columnFile : columnFiles) {
+ wrappers.add(new ColumnFileWrapper(columnFile));
+ }
+
+ return wrappers;
+ }
+
+ private StructLike unionPartition() {
+ if (specId == null) {
+ return null;
+ }
+
+ StructProjection projection = partitionProjections.get(specId);
+ return projection != null ? projection.wrap(wrapped.partition()) :
wrapped.partition();
+ }
+
+ private static Map<Integer, StructProjection> partitionProjections(
+ Iterable<PartitionSpec> specs, Types.StructType unionType) {
+ Map<Integer, StructProjection> projections = Maps.newHashMap();
+ for (PartitionSpec spec : specs) {
+ Types.StructType partitionType = spec.partitionType();
+ for (Types.NestedField field : partitionType.fields()) {
+ Preconditions.checkArgument(
+ unionType.field(field.fieldId()) != null,
+ "Invalid union partition type, missing field %s from spec %s:
%s",
+ field.fieldId(),
+ spec.specId(),
+ unionType);
+ }
+
+ StructProjection projection =
+ partitionType.equals(unionType)
+ ? null
+ : StructProjection.createAllowMissing(partitionType,
unionType);
+ projections.put(spec.specId(), projection);
+ }
+
+ return projections;
+ }
+ }
+
+ /** Wrapper used to write a data file to a v4 leaf manifest. */
+ static class LeafTrackedFileWrapper extends TrackedFileWrapper {
+ LeafTrackedFileWrapper(
+ Map<Integer, PartitionSpec> specsById,
+ Types.StructType partitionType,
+ Types.StructType contentStatsType) {
+ super(
+ specsById,
+ partitionType,
+ contentStatsType,
+ new TrackingWrapper(),
+ null /* leaf manifests only contain data files */);
+ }
+
+ LeafTrackedFileWrapper wrap(TrackedFile file, Tracking newTracking) {
+ Preconditions.checkArgument(file != null, "Invalid file: null");
+ Preconditions.checkArgument(newTracking != null, "Invalid tracking:
null");
+ Preconditions.checkArgument(
+ file.contentType() == FileContent.DATA,
+ "Invalid content type for leaf manifest: %s",
+ file.contentType());
+
+ wrapInternal(file, newTracking, null /* assignedFirstRowId */);
+ return this;
+ }
+ }
+
+ /** Wrapper used to write a data file or leaf manifest to a v4 root
manifest. */
+ static class RootTrackedFileWrapper extends TrackedFileWrapper {
+ RootTrackedFileWrapper(
+ long commitSnapshotId,
+ long commitSequenceNumber,
+ Map<Integer, PartitionSpec> specsById,
+ Types.StructType partitionType,
+ Types.StructType contentStatsType) {
+ super(
+ specsById,
+ partitionType,
+ contentStatsType,
+ new TrackingWrapper(commitSnapshotId, commitSequenceNumber),
+ new ManifestInfoWrapper(commitSequenceNumber));
+ }
+
+ /**
+ * Re-points this wrapper at a file and the tracking to write for it.
+ *
+ * @param file a data file or manifest
+ * @param newTracking the tracking to write for the file
+ * @param assignedFirstRowId a first row ID to assign to the file, or null
if it is already
+ * assigned
+ * @return this for method chaining
+ */
+ RootTrackedFileWrapper wrap(TrackedFile file, Tracking newTracking, Long
assignedFirstRowId) {
+ Preconditions.checkArgument(file != null, "Invalid file: null");
+ Preconditions.checkArgument(newTracking != null, "Invalid tracking:
null");
+
+ FileContent content = file.contentType();
+ Preconditions.checkArgument(
+ content == FileContent.DATA
+ || content == FileContent.DATA_MANIFEST
+ || content == FileContent.DELETE_MANIFEST,
+ "Invalid content type for root manifest: %s",
+ content);
+ Preconditions.checkArgument(
+ newTracking.snapshotId() != null, "Missing snapshot ID for file:
%s", file.location());
+
+ wrapInternal(file, newTracking, assignedFirstRowId);
+ return this;
+ }
+ }
+
+ /** Wrapper used to write {@link Tracking} using the v4 tracking schema. */
+ private static class TrackingWrapper implements StructLike {
+ private static final int SIZE = Tracking.schema().fields().size();
+
+ private final Long commitSnapshotId;
+ private final Long commitSequenceNumber;
+
+ private TrackedFile file = null;
+ private Tracking wrapped = null;
+ private Long assignedFirstRowId = null;
+
+ private TrackingWrapper() {
+ this.commitSnapshotId = null;
+ this.commitSequenceNumber = null;
+ }
+
+ private TrackingWrapper(long commitSnapshotId, long commitSequenceNumber) {
+ this.commitSnapshotId = commitSnapshotId;
+ this.commitSequenceNumber = commitSequenceNumber;
+ }
+
+ private TrackingWrapper wrap(TrackedFile trackedFile, Tracking tracking,
Long firstRowId) {
+ if (commitSnapshotId != null) {
+ if (isUnassigned(tracking.dataSequenceNumber())) {
+ // a modified entry inherits the data sequence number of the commit
that modified it
+ Long dataSnapshotId =
+ tracking.status() == EntryStatus.MODIFIED
+ ? tracking.modifiedSnapshotId()
+ : tracking.snapshotId();
+ Preconditions.checkState(
+ commitSnapshotId.equals(dataSnapshotId),
+ "Cannot assign sequence number to file from snapshot %s
(committing snapshot %s): %s",
+ dataSnapshotId,
+ commitSnapshotId,
+ trackedFile.location());
+ }
+
+ if (isUnassigned(tracking.fileSequenceNumber())) {
+ Preconditions.checkState(
+ commitSnapshotId.equals(tracking.snapshotId()),
+ "Cannot assign sequence number to file from snapshot %s
(committing snapshot %s): %s",
+ tracking.snapshotId(),
+ commitSnapshotId,
+ trackedFile.location());
+ }
+
+ if (trackedFile.contentType() == FileContent.DELETE_MANIFEST) {
+ Preconditions.checkState(
+ firstRowId == null,
+ "Cannot assign first-row-id to delete manifest: %s",
+ trackedFile.location());
+ } else if (firstRowId != null) {
+ Preconditions.checkState(
+ tracking.status().isLive(),
+ "Cannot assign first-row-id to file with status %s: %s",
+ tracking.status(),
+ trackedFile.location());
+ Preconditions.checkState(
+ tracking.firstRowId() == null,
+ "Cannot assign first-row-id to file with existing first-row-id
%s: %s",
+ tracking.firstRowId(),
+ trackedFile.location());
+ } else {
+ Preconditions.checkState(
+ tracking.firstRowId() != null,
+ "Missing first-row-id for file: %s",
+ trackedFile.location());
+ }
+ }
+
+ this.file = trackedFile;
+ this.wrapped = tracking;
+ this.assignedFirstRowId = firstRowId;
+ return this;
+ }
+
+ @Override
+ public int size() {
+ return SIZE;
+ }
+
+ @Override
+ public <T> void set(int pos, T value) {
+ throw new UnsupportedOperationException("Cannot modify TrackingWrapper
wrapper via set");
+ }
+
+ @Override
+ public <T> T get(int pos, Class<T> javaClass) {
+ return javaClass.cast(get(pos));
+ }
+
+ private Object get(int pos) {
+ return switch (pos) {
+ case 0 -> wrapped.status().id();
+ case 1 -> wrapped.snapshotId();
+ case 2 -> assignSequenceNumber(wrapped.dataSequenceNumber(),
commitSequenceNumber);
+ case 3 -> assignSequenceNumber(wrapped.fileSequenceNumber(),
commitSequenceNumber);
+ case 4 -> wrapped.modifiedSnapshotId();
+ case 5 -> firstRowId();
+ case 6 -> wrapped.deletedPositions();
+ case 7 -> wrapped.replacedPositions();
+ default -> throw new UnsupportedOperationException("Unknown field
ordinal: " + pos);
+ };
+ }
+
+ private static Long assignSequenceNumber(Long sequenceNumber, Long
commitSequenceNumber) {
+ return commitSequenceNumber != null && isUnassigned(sequenceNumber)
+ ? commitSequenceNumber
+ : sequenceNumber;
+ }
+
+ private Long firstRowId() {
+ if (file.contentType() == FileContent.DELETE_MANIFEST) {
+ return null;
+ }
+
+ return assignedFirstRowId != null ? assignedFirstRowId :
wrapped.firstRowId();
+ }
+
+ private static boolean isUnassigned(Long sequenceNumber) {
+ return sequenceNumber == null || sequenceNumber ==
ManifestWriter.UNASSIGNED_SEQ;
+ }
+ }
+
+ /** Wrapper used to write {@link ManifestInfo} using the v4 manifest info
schema. */
+ private static class ManifestInfoWrapper implements StructLike {
+ private static final int SIZE = ManifestInfo.schema().fields().size();
+
+ private final long commitSequenceNumber;
+ private ManifestInfo wrapped = null;
+
+ private ManifestInfoWrapper(long commitSequenceNumber) {
+ this.commitSequenceNumber = commitSequenceNumber;
+ }
+
+ private ManifestInfoWrapper wrap(ManifestInfo info) {
+ this.wrapped = info;
+ return this;
+ }
+
+ @Override
+ public int size() {
+ return SIZE;
+ }
+
+ @Override
+ public <T> void set(int pos, T value) {
+ throw new UnsupportedOperationException("Cannot modify
ManifestInfoWrapper wrapper via set");
+ }
+
+ @Override
+ public <T> T get(int pos, Class<T> javaClass) {
+ return javaClass.cast(get(pos));
+ }
+
+ private Object get(int pos) {
+ return switch (pos) {
+ case 0 -> wrapped.addedFilesCount();
+ case 1 -> wrapped.existingFilesCount();
+ case 2 -> wrapped.deletedFilesCount();
+ case 3 -> wrapped.replacedFilesCount();
+ case 4 -> wrapped.modifiedFilesCount();
+ case 5 -> wrapped.addedRowsCount();
+ case 6 -> wrapped.existingRowsCount();
+ case 7 -> wrapped.deletedRowsCount();
+ case 8 -> wrapped.replacedRowsCount();
+ case 9 -> wrapped.modifiedRowsCount();
+ case 10 -> minSequenceNumber();
+ case 11 -> mdvBuffer();
+ case 12 -> wrapped.formatVersion();
+ default -> throw new UnsupportedOperationException("Unknown field
ordinal: " + pos);
+ };
+ }
+
+ private long minSequenceNumber() {
+ if (wrapped.minSequenceNumber() == ManifestWriter.UNASSIGNED_SEQ) {
+ return commitSequenceNumber;
+ }
+
+ return wrapped.minSequenceNumber();
+ }
+
+ private ByteBuffer mdvBuffer() {
+ ManifestBitmap mdv = wrapped.manifestDeletionVector();
+ return mdv != null ? mdv.buffer() : null;
+ }
+ }
+
+ /** Wrapper used to write {@link ContentStats} using a manifest's content
stats type. */
+ private static class ContentStatsWrapper implements StructLike {
+ private final int[] posToFieldId;
+ private final FieldStatsWrapper[] fieldStats;
+ private ContentStats wrapped = null;
+
+ private ContentStatsWrapper(Types.StructType type) {
+ List<Types.NestedField> fields = type.fields();
+ this.posToFieldId = ContentStatsStruct.posToId(type);
+ this.fieldStats = new FieldStatsWrapper[fields.size()];
+ for (int pos = 0; pos < fields.size(); pos += 1) {
+ fieldStats[pos] = new
FieldStatsWrapper(fields.get(pos).type().asStructType());
+ }
+ }
+
+ private ContentStatsWrapper wrap(ContentStats stats) {
+ this.wrapped = stats;
+ return this;
+ }
+
+ @Override
+ public int size() {
+ return posToFieldId.length;
+ }
+
+ @Override
+ public <T> void set(int pos, T value) {
+ throw new UnsupportedOperationException("Cannot modify
ContentStatsWrapper wrapper via set");
+ }
+
+ @Override
+ public <T> T get(int pos, Class<T> javaClass) {
+ FieldStats<?> stats = wrapped.statsFor(posToFieldId[pos]);
+ return stats != null ? javaClass.cast(fieldStats[pos].wrap(stats)) :
null;
+ }
+ }
+
+ /** Wrapper used to write {@link DeletionVector} using the v4 deletion
vector schema. */
+ private static class DeletionVectorWrapper implements StructLike {
+ private static final int SIZE = DeletionVector.schema().fields().size();
+
+ private DeletionVector wrapped = null;
+
+ private DeletionVectorWrapper wrap(DeletionVector dv) {
+ this.wrapped = dv;
+ return this;
+ }
+
+ @Override
+ public int size() {
+ return SIZE;
+ }
+
+ @Override
+ public <T> void set(int pos, T value) {
+ throw new UnsupportedOperationException(
+ "Cannot modify DeletionVectorWrapper wrapper via set");
+ }
+
+ @Override
+ public <T> T get(int pos, Class<T> javaClass) {
+ return javaClass.cast(get(pos));
+ }
+
+ private Object get(int pos) {
+ return switch (pos) {
+ case 0 -> wrapped.location();
+ case 1 -> wrapped.offset();
+ case 2 -> wrapped.sizeInBytes();
+ case 3 -> wrapped.cardinality();
+ case 4 -> wrapped.keyMetadata();
+ default -> throw new UnsupportedOperationException("Unknown field
ordinal: " + pos);
+ };
+ }
+ }
+
+ /** Wrapper used to write {@link ColumnFile} using the v4 column file
schema. */
+ private static class ColumnFileWrapper implements StructLike {
+ private static final int SIZE = ColumnFile.schema().fields().size();
+
+ private final ColumnFile wrapped;
+
+ private ColumnFileWrapper(ColumnFile columnFile) {
+ this.wrapped = columnFile;
+ }
+
+ @Override
+ public int size() {
+ return SIZE;
+ }
+
+ @Override
+ public <T> void set(int pos, T value) {
+ throw new UnsupportedOperationException("Cannot modify ColumnFileWrapper
wrapper via set");
+ }
+
+ @Override
+ public <T> T get(int pos, Class<T> javaClass) {
+ return javaClass.cast(get(pos));
+ }
+
+ private Object get(int pos) {
+ return switch (pos) {
+ case 0 -> wrapped.location();
+ case 1 -> ImmutableList.copyOf(wrapped.fieldIds());
Review Comment:
The writer is a `CollectionWriter` so it doesn't matter whether this returns
a `List` or a `Set` because both are `Collection`. You can return the `Set`
directly.
The only change I would make is to use a `LinkedHashSet` in
`ColumnFileStruct`:
```java
@Override
public Set<Integer> fieldIds() {
return fieldIds != null ? Sets.newLinkedHashSet(Ints.asList(fieldIds)) :
null;
}
```
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