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Trino - Delta Lake connector
/*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package io.trino.plugin.deltalake;
import com.google.common.collect.ImmutableList;
import io.airlift.concurrent.MoreFutures;
import io.airlift.json.JsonCodec;
import io.airlift.slice.Slice;
import io.airlift.slice.Slices;
import io.trino.filesystem.Location;
import io.trino.filesystem.TrinoFileSystem;
import io.trino.filesystem.TrinoFileSystemFactory;
import io.trino.filesystem.TrinoInputFile;
import io.trino.parquet.ParquetReaderOptions;
import io.trino.parquet.writer.ParquetWriterOptions;
import io.trino.plugin.hive.FileFormatDataSourceStats;
import io.trino.plugin.hive.ReaderPageSource;
import io.trino.plugin.hive.parquet.ParquetFileWriter;
import io.trino.plugin.hive.parquet.ParquetPageSourceFactory;
import io.trino.spi.Page;
import io.trino.spi.TrinoException;
import io.trino.spi.block.Block;
import io.trino.spi.block.RunLengthEncodedBlock;
import io.trino.spi.connector.ConnectorMergeSink;
import io.trino.spi.connector.ConnectorPageSink;
import io.trino.spi.connector.ConnectorPageSource;
import io.trino.spi.connector.ConnectorSession;
import io.trino.spi.predicate.TupleDomain;
import io.trino.spi.type.Type;
import io.trino.spi.type.TypeOperators;
import jakarta.annotation.Nullable;
import org.apache.parquet.format.CompressionCodec;
import org.joda.time.DateTimeZone;
import org.roaringbitmap.longlong.LongBitmapDataProvider;
import org.roaringbitmap.longlong.Roaring64Bitmap;
import java.io.Closeable;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Optional;
import java.util.OptionalLong;
import java.util.concurrent.CompletableFuture;
import java.util.function.Supplier;
import java.util.stream.IntStream;
import static com.google.common.base.Verify.verify;
import static com.google.common.collect.ImmutableList.toImmutableList;
import static io.airlift.json.JsonCodec.listJsonCodec;
import static io.airlift.slice.Slices.utf8Slice;
import static io.trino.plugin.deltalake.DataFileInfo.DataFileType.DATA;
import static io.trino.plugin.deltalake.DeltaLakeColumnType.REGULAR;
import static io.trino.plugin.deltalake.DeltaLakeColumnType.SYNTHESIZED;
import static io.trino.plugin.deltalake.DeltaLakeErrorCode.DELTA_LAKE_BAD_WRITE;
import static io.trino.plugin.deltalake.DeltaLakeMetadata.relativePath;
import static io.trino.plugin.deltalake.DeltaLakeSessionProperties.getCompressionCodec;
import static io.trino.plugin.deltalake.DeltaLakeSessionProperties.getParquetWriterBlockSize;
import static io.trino.plugin.deltalake.DeltaLakeSessionProperties.getParquetWriterPageSize;
import static io.trino.plugin.deltalake.DeltaLakeSessionProperties.getParquetWriterPageValueCount;
import static io.trino.plugin.deltalake.DeltaLakeTypes.toParquetType;
import static io.trino.plugin.deltalake.transactionlog.TransactionLogParser.deserializePartitionValue;
import static io.trino.spi.block.RowBlock.getRowFieldsFromBlock;
import static io.trino.spi.predicate.Utils.nativeValueToBlock;
import static io.trino.spi.type.BigintType.BIGINT;
import static io.trino.spi.type.TinyintType.TINYINT;
import static io.trino.spi.type.VarcharType.VARCHAR;
import static java.lang.String.format;
import static java.util.Collections.unmodifiableList;
import static java.util.Objects.requireNonNull;
import static java.util.UUID.randomUUID;
import static java.util.concurrent.CompletableFuture.completedFuture;
public class DeltaLakeMergeSink
implements ConnectorMergeSink
{
private static final JsonCodec> PARTITIONS_CODEC = listJsonCodec(String.class);
public static final String INSERT_CDF_LABEL = "insert";
public static final String DELETE_CDF_LABEL = "delete";
public static final String UPDATE_PREIMAGE_CDF_LABEL = "update_preimage";
public static final String UPDATE_POSTIMAGE_CDF_LABEL = "update_postimage";
private final TypeOperators typeOperators;
private final TrinoFileSystem fileSystem;
private final ConnectorSession session;
private final DateTimeZone parquetDateTimeZone;
private final String trinoVersion;
private final JsonCodec dataFileInfoCodec;
private final JsonCodec mergeResultJsonCodec;
private final DeltaLakeWriterStats writerStats;
private final Location rootTableLocation;
private final ConnectorPageSink insertPageSink;
private final List dataColumns;
private final List nonSynthesizedColumns;
private final int tableColumnCount;
private final int domainCompactionThreshold;
private final Supplier cdfPageSinkSupplier;
private final boolean cdfEnabled;
private final Map fileDeletions = new HashMap<>();
private final int[] dataColumnsIndices;
private final int[] dataAndRowIdColumnsIndices;
private final DeltaLakeParquetSchemaMapping parquetSchemaMapping;
@Nullable
private DeltaLakeCdfPageSink cdfPageSink;
public DeltaLakeMergeSink(
TypeOperators typeOperators,
TrinoFileSystemFactory fileSystemFactory,
ConnectorSession session,
DateTimeZone parquetDateTimeZone,
String trinoVersion,
JsonCodec dataFileInfoCodec,
JsonCodec mergeResultJsonCodec,
DeltaLakeWriterStats writerStats,
Location rootTableLocation,
ConnectorPageSink insertPageSink,
List tableColumns,
int domainCompactionThreshold,
Supplier cdfPageSinkSupplier,
boolean cdfEnabled,
DeltaLakeParquetSchemaMapping parquetSchemaMapping)
{
this.typeOperators = requireNonNull(typeOperators, "typeOperators is null");
this.session = requireNonNull(session, "session is null");
this.fileSystem = fileSystemFactory.create(session);
this.parquetDateTimeZone = requireNonNull(parquetDateTimeZone, "parquetDateTimeZone is null");
this.trinoVersion = requireNonNull(trinoVersion, "trinoVersion is null");
this.dataFileInfoCodec = requireNonNull(dataFileInfoCodec, "dataFileInfoCodec is null");
this.mergeResultJsonCodec = requireNonNull(mergeResultJsonCodec, "mergeResultJsonCodec is null");
this.writerStats = requireNonNull(writerStats, "writerStats is null");
this.rootTableLocation = requireNonNull(rootTableLocation, "rootTableLocation is null");
this.insertPageSink = requireNonNull(insertPageSink, "insertPageSink is null");
requireNonNull(tableColumns, "tableColumns is null");
this.tableColumnCount = tableColumns.size();
this.dataColumns = tableColumns.stream()
.filter(column -> column.getColumnType() == REGULAR)
.collect(toImmutableList());
this.domainCompactionThreshold = domainCompactionThreshold;
this.nonSynthesizedColumns = tableColumns.stream()
.filter(column -> column.getColumnType() != SYNTHESIZED)
.collect(toImmutableList());
this.cdfPageSinkSupplier = requireNonNull(cdfPageSinkSupplier);
this.cdfEnabled = cdfEnabled;
this.parquetSchemaMapping = requireNonNull(parquetSchemaMapping, "parquetSchemaMapping is null");
dataColumnsIndices = new int[tableColumnCount];
dataAndRowIdColumnsIndices = new int[tableColumnCount + 1];
for (int i = 0; i < tableColumnCount; i++) {
dataColumnsIndices[i] = i;
dataAndRowIdColumnsIndices[i] = i;
}
dataAndRowIdColumnsIndices[tableColumnCount] = tableColumnCount + 1; // row ID channel
}
@Override
public void storeMergedRows(Page page)
{
DeltaLakeMergePage mergePage = createPages(page, tableColumnCount);
mergePage.insertionsPage().ifPresent(insertPageSink::appendPage);
mergePage.updateInsertionsPage().ifPresent(insertPageSink::appendPage);
processInsertions(mergePage.insertionsPage(), INSERT_CDF_LABEL);
processInsertions(mergePage.updateInsertionsPage(), UPDATE_POSTIMAGE_CDF_LABEL);
mergePage.deletionsPage().ifPresent(deletions -> processDeletion(deletions, DELETE_CDF_LABEL));
mergePage.updateDeletionsPage().ifPresent(deletions -> processDeletion(deletions, UPDATE_PREIMAGE_CDF_LABEL));
}
private void processInsertions(Optional optionalInsertionPage, String cdfOperation)
{
if (cdfEnabled && optionalInsertionPage.isPresent()) {
if (cdfPageSink == null) {
cdfPageSink = cdfPageSinkSupplier.get();
}
Page updateInsertionsPage = optionalInsertionPage.get();
Block[] cdfPostUpdateBlocks = new Block[nonSynthesizedColumns.size() + 1];
for (int i = 0; i < nonSynthesizedColumns.size(); i++) {
cdfPostUpdateBlocks[i] = updateInsertionsPage.getBlock(i);
}
cdfPostUpdateBlocks[nonSynthesizedColumns.size()] = RunLengthEncodedBlock.create(
nativeValueToBlock(VARCHAR, utf8Slice(cdfOperation)), updateInsertionsPage.getPositionCount());
cdfPageSink.appendPage(new Page(updateInsertionsPage.getPositionCount(), cdfPostUpdateBlocks));
}
}
private void processDeletion(Page deletions, String cdfOperation)
{
List fields = getRowFieldsFromBlock(deletions.getBlock(deletions.getChannelCount() - 1));
Block filePathBlock = fields.get(0);
Block rowPositionBlock = fields.get(1);
Block partitionsBlock = fields.get(2);
for (int position = 0; position < filePathBlock.getPositionCount(); position++) {
Slice filePath = VARCHAR.getSlice(filePathBlock, position);
long rowPosition = BIGINT.getLong(rowPositionBlock, position);
Slice partitions = VARCHAR.getSlice(partitionsBlock, position);
List partitionValues = PARTITIONS_CODEC.fromJson(partitions.toStringUtf8());
FileDeletion deletion = fileDeletions.computeIfAbsent(filePath, ignored -> new FileDeletion(partitionValues));
if (cdfOperation.equals(UPDATE_PREIMAGE_CDF_LABEL)) {
deletion.rowsDeletedByUpdate().addLong(rowPosition);
}
else {
deletion.rowsDeletedByDelete().addLong(rowPosition);
}
}
}
private DeltaLakeMergePage createPages(Page inputPage, int dataColumnCount)
{
int inputChannelCount = inputPage.getChannelCount();
if (inputChannelCount != dataColumnCount + 2) {
throw new IllegalArgumentException(format("inputPage channelCount (%s) == dataColumns size (%s) + 2", inputChannelCount, dataColumnCount));
}
int positionCount = inputPage.getPositionCount();
if (positionCount <= 0) {
throw new IllegalArgumentException("positionCount should be > 0, but is " + positionCount);
}
Block operationBlock = inputPage.getBlock(inputChannelCount - 2);
int[] deletePositions = new int[positionCount];
int[] insertPositions = new int[positionCount];
int[] updateInsertPositions = new int[positionCount];
int[] updateDeletePositions = new int[positionCount];
int deletePositionCount = 0;
int insertPositionCount = 0;
int updateInsertPositionCount = 0;
int updateDeletePositionCount = 0;
for (int position = 0; position < positionCount; position++) {
byte operation = TINYINT.getByte(operationBlock, position);
switch (operation) {
case DELETE_OPERATION_NUMBER:
deletePositions[deletePositionCount] = position;
deletePositionCount++;
break;
case INSERT_OPERATION_NUMBER:
insertPositions[insertPositionCount] = position;
insertPositionCount++;
break;
case UPDATE_INSERT_OPERATION_NUMBER:
updateInsertPositions[updateInsertPositionCount] = position;
updateInsertPositionCount++;
break;
case UPDATE_DELETE_OPERATION_NUMBER:
updateDeletePositions[updateDeletePositionCount] = position;
updateDeletePositionCount++;
break;
default:
throw new IllegalArgumentException("Invalid merge operation: " + operation);
}
}
Optional deletePage = Optional.empty();
if (deletePositionCount > 0) {
deletePage = Optional.of(inputPage
.getColumns(dataAndRowIdColumnsIndices)
.getPositions(deletePositions, 0, deletePositionCount));
}
Optional insertPage = Optional.empty();
if (insertPositionCount > 0) {
insertPage = Optional.of(inputPage
.getColumns(dataColumnsIndices)
.getPositions(insertPositions, 0, insertPositionCount));
}
Optional updateInsertPage = Optional.empty();
if (updateInsertPositionCount > 0) {
updateInsertPage = Optional.of(inputPage
.getColumns(dataColumnsIndices)
.getPositions(updateInsertPositions, 0, updateInsertPositionCount));
}
Optional updateDeletePage = Optional.empty();
if (updateDeletePositionCount > 0) {
updateDeletePage = Optional.of(inputPage
.getColumns(dataAndRowIdColumnsIndices)
.getPositions(updateDeletePositions, 0, updateDeletePositionCount));
}
return new DeltaLakeMergePage(deletePage, insertPage, updateInsertPage, updateDeletePage);
}
@Override
public CompletableFuture> finish()
{
List fragments = new ArrayList<>();
insertPageSink.finish().join().stream()
.map(Slice::getBytes)
.map(dataFileInfoCodec::fromJson)
.map(info -> new DeltaLakeMergeResult(info.getPartitionValues(), Optional.empty(), Optional.of(info)))
.map(mergeResultJsonCodec::toJsonBytes)
.map(Slices::wrappedBuffer)
.forEach(fragments::add);
fileDeletions.forEach((path, deletion) ->
fragments.addAll(rewriteFile(path.toStringUtf8(), deletion)));
if (cdfEnabled && cdfPageSink != null) { // cdf may be enabled but there may be no update/deletion so sink was not instantiated
MoreFutures.getDone(cdfPageSink.finish()).stream()
.map(Slice::getBytes)
.map(dataFileInfoCodec::fromJson)
.map(info -> new DeltaLakeMergeResult(info.getPartitionValues(), Optional.empty(), Optional.of(info)))
.map(mergeResultJsonCodec::toJsonBytes)
.map(Slices::wrappedBuffer)
.forEach(fragments::add);
}
return completedFuture(fragments);
}
// In spite of the name "Delta" Lake, we must rewrite the entire file to delete rows.
private List rewriteFile(String sourcePath, FileDeletion deletion)
{
try {
String tablePath = rootTableLocation.toString();
Location sourceLocation = Location.of(sourcePath);
String sourceRelativePath = relativePath(tablePath, sourcePath);
Location targetLocation = sourceLocation.sibling(session.getQueryId() + "_" + randomUUID());
String targetRelativePath = relativePath(tablePath, targetLocation.toString());
ParquetFileWriter fileWriter = createParquetFileWriter(targetLocation, dataColumns);
DeltaLakeWriter writer = new DeltaLakeWriter(
fileWriter,
rootTableLocation,
targetRelativePath,
deletion.partitionValues(),
writerStats,
dataColumns,
DATA);
Optional newFileInfo = rewriteParquetFile(sourceLocation, deletion, writer);
DeltaLakeMergeResult result = new DeltaLakeMergeResult(deletion.partitionValues(), Optional.of(sourceRelativePath), newFileInfo);
return ImmutableList.of(utf8Slice(mergeResultJsonCodec.toJson(result)));
}
catch (IOException e) {
throw new TrinoException(DELTA_LAKE_BAD_WRITE, "Unable to rewrite Parquet file", e);
}
}
private ParquetFileWriter createParquetFileWriter(Location path, List dataColumns)
{
ParquetWriterOptions parquetWriterOptions = ParquetWriterOptions.builder()
.setMaxBlockSize(getParquetWriterBlockSize(session))
.setMaxPageSize(getParquetWriterPageSize(session))
.setMaxPageValueCount(getParquetWriterPageValueCount(session))
.build();
CompressionCodec compressionCodec = getCompressionCodec(session).getParquetCompressionCodec()
.orElseThrow(); // validated on the session property level
try {
Closeable rollbackAction = () -> fileSystem.deleteFile(path);
dataColumns.forEach(column -> verify(column.isBaseColumn(), "Unexpected dereference: %s", column));
List parquetTypes = dataColumns.stream()
.map(column -> toParquetType(typeOperators, column.getBasePhysicalType()))
.collect(toImmutableList());
List dataColumnNames = dataColumns.stream()
.map(DeltaLakeColumnHandle::getBasePhysicalColumnName)
.collect(toImmutableList());
return new ParquetFileWriter(
fileSystem.newOutputFile(path),
rollbackAction,
parquetTypes,
dataColumnNames,
parquetSchemaMapping.messageType(),
parquetSchemaMapping.primitiveTypes(),
parquetWriterOptions,
IntStream.range(0, dataColumns.size()).toArray(),
compressionCodec,
trinoVersion,
Optional.empty(),
Optional.empty());
}
catch (IOException e) {
throw new TrinoException(DELTA_LAKE_BAD_WRITE, "Error creating Parquet file", e);
}
}
private Optional rewriteParquetFile(Location path, FileDeletion deletion, DeltaLakeWriter fileWriter)
throws IOException
{
LongBitmapDataProvider rowsDeletedByDelete = deletion.rowsDeletedByDelete();
LongBitmapDataProvider rowsDeletedByUpdate = deletion.rowsDeletedByUpdate();
try (ConnectorPageSource connectorPageSource = createParquetPageSource(path).get()) {
long filePosition = 0;
while (!connectorPageSource.isFinished()) {
Page page = connectorPageSource.getNextPage();
if (page == null) {
continue;
}
int positionCount = page.getPositionCount();
int[] retained = new int[positionCount];
int[] deletedByDelete = new int[(int) rowsDeletedByDelete.getLongCardinality()];
int[] deletedByUpdate = new int[(int) rowsDeletedByUpdate.getLongCardinality()];
int retainedCount = 0;
int deletedByUpdateCount = 0;
int deletedByDeleteCount = 0;
for (int position = 0; position < positionCount; position++) {
if (rowsDeletedByDelete.contains(filePosition)) {
deletedByDelete[deletedByDeleteCount] = position;
deletedByDeleteCount++;
}
else if (rowsDeletedByUpdate.contains(filePosition)) {
deletedByUpdate[deletedByUpdateCount] = position;
deletedByUpdateCount++;
}
else {
retained[retainedCount] = position;
retainedCount++;
}
filePosition++;
}
storeCdfEntries(page, deletedByDelete, deletedByDeleteCount, deletion, DELETE_CDF_LABEL);
storeCdfEntries(page, deletedByUpdate, deletedByUpdateCount, deletion, UPDATE_PREIMAGE_CDF_LABEL);
if (retainedCount != positionCount) {
page = page.getPositions(retained, 0, retainedCount);
}
if (page.getPositionCount() > 0) {
fileWriter.appendRows(page);
}
}
if (fileWriter.getRowCount() == 0) {
fileWriter.rollback();
return Optional.empty();
}
fileWriter.commit();
}
catch (Throwable t) {
try {
fileWriter.rollback();
}
catch (RuntimeException e) {
if (!t.equals(e)) {
t.addSuppressed(e);
}
}
throw t;
}
return Optional.of(fileWriter.getDataFileInfo());
}
private void storeCdfEntries(Page page, int[] deleted, int deletedCount, FileDeletion deletion, String operation)
{
if (cdfEnabled && page.getPositionCount() > 0) {
if (cdfPageSink == null) {
cdfPageSink = cdfPageSinkSupplier.get();
}
Page cdfPage = page.getPositions(deleted, 0, deletedCount);
Block[] outputBlocks = new Block[nonSynthesizedColumns.size() + 1];
int cdfPageIndex = 0;
int partitionIndex = 0;
List partitionValues = deletion.partitionValues;
for (int i = 0; i < nonSynthesizedColumns.size(); i++) {
if (nonSynthesizedColumns.get(i).getColumnType() == REGULAR) {
outputBlocks[i] = cdfPage.getBlock(cdfPageIndex);
cdfPageIndex++;
}
else {
outputBlocks[i] = RunLengthEncodedBlock.create(nativeValueToBlock(
nonSynthesizedColumns.get(i).getBaseType(),
deserializePartitionValue(
nonSynthesizedColumns.get(i),
Optional.ofNullable(partitionValues.get(partitionIndex)))),
cdfPage.getPositionCount());
partitionIndex++;
}
}
Block cdfOperationBlock = RunLengthEncodedBlock.create(
nativeValueToBlock(VARCHAR, utf8Slice(operation)), cdfPage.getPositionCount());
outputBlocks[nonSynthesizedColumns.size()] = cdfOperationBlock;
cdfPageSink.appendPage(new Page(cdfPage.getPositionCount(), outputBlocks));
}
}
private ReaderPageSource createParquetPageSource(Location path)
throws IOException
{
TrinoInputFile inputFile = fileSystem.newInputFile(path);
long fileSize = inputFile.length();
return ParquetPageSourceFactory.createPageSource(
inputFile,
0,
fileSize,
dataColumns.stream()
.map(DeltaLakeColumnHandle::toHiveColumnHandle)
.collect(toImmutableList()),
ImmutableList.of(TupleDomain.all()),
true,
parquetDateTimeZone,
new FileFormatDataSourceStats(),
new ParquetReaderOptions().withBloomFilter(false),
Optional.empty(),
domainCompactionThreshold,
OptionalLong.of(fileSize));
}
@Override
public void abort()
{
if (cdfPageSink != null) {
cdfPageSink.abort();
}
}
private static class FileDeletion
{
private final List partitionValues;
private final LongBitmapDataProvider rowsDeletedByDelete = new Roaring64Bitmap();
private final LongBitmapDataProvider rowsDeletedByUpdate = new Roaring64Bitmap();
private FileDeletion(List partitionValues)
{
// Use ArrayList since Delta Lake allows NULL partition values, and wrap it in
// an unmodifiableList.
this.partitionValues = unmodifiableList(new ArrayList<>(requireNonNull(partitionValues, "partitionValues is null")));
}
public List partitionValues()
{
return partitionValues;
}
public LongBitmapDataProvider rowsDeletedByDelete()
{
return rowsDeletedByDelete;
}
public LongBitmapDataProvider rowsDeletedByUpdate()
{
return rowsDeletedByUpdate;
}
}
private record DeltaLakeMergePage(
Optional deletionsPage,
Optional insertionsPage,
Optional updateInsertionsPage,
Optional updateDeletionsPage)
{
public DeltaLakeMergePage
{
requireNonNull(deletionsPage, "deletionsPage is null");
requireNonNull(insertionsPage, "insertionsPage is null");
requireNonNull(updateInsertionsPage, "updateInsertionsPage is null");
requireNonNull(updateDeletionsPage, "updateDeletionsPage is null");
}
}
}