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/*
* 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 com.facebook.presto.hive.metastore;
import com.facebook.airlift.log.Logger;
import com.facebook.presto.common.predicate.Domain;
import com.facebook.presto.common.type.Type;
import com.facebook.presto.hive.HdfsContext;
import com.facebook.presto.hive.HdfsEnvironment;
import com.facebook.presto.hive.HiveBasicStatistics;
import com.facebook.presto.hive.HiveType;
import com.facebook.presto.hive.LocationHandle.WriteMode;
import com.facebook.presto.hive.PartitionNotFoundException;
import com.facebook.presto.hive.TableAlreadyExistsException;
import com.facebook.presto.spi.ConnectorSession;
import com.facebook.presto.spi.PrestoException;
import com.facebook.presto.spi.SchemaTableName;
import com.facebook.presto.spi.StandardErrorCode;
import com.facebook.presto.spi.TableNotFoundException;
import com.facebook.presto.spi.security.PrestoPrincipal;
import com.facebook.presto.spi.security.PrincipalType;
import com.facebook.presto.spi.security.RoleGrant;
import com.facebook.presto.spi.statistics.ColumnStatisticType;
import com.google.common.annotations.VisibleForTesting;
import com.google.common.base.Joiner;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableMap;
import com.google.common.collect.ImmutableSet;
import com.google.common.collect.Iterables;
import com.google.common.collect.Lists;
import com.google.common.util.concurrent.ListenableFuture;
import com.google.common.util.concurrent.ListeningExecutorService;
import org.apache.hadoop.fs.FileStatus;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import javax.annotation.concurrent.GuardedBy;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Optional;
import java.util.OptionalLong;
import java.util.Set;
import java.util.concurrent.atomic.AtomicBoolean;
import static com.facebook.airlift.concurrent.MoreFutures.getFutureValue;
import static com.facebook.presto.hive.HiveErrorCode.HIVE_CORRUPTED_COLUMN_STATISTICS;
import static com.facebook.presto.hive.HiveErrorCode.HIVE_FILESYSTEM_ERROR;
import static com.facebook.presto.hive.HiveErrorCode.HIVE_METASTORE_ERROR;
import static com.facebook.presto.hive.HiveErrorCode.HIVE_PATH_ALREADY_EXISTS;
import static com.facebook.presto.hive.HiveErrorCode.HIVE_TABLE_DROPPED_DURING_QUERY;
import static com.facebook.presto.hive.LocationHandle.WriteMode.DIRECT_TO_TARGET_NEW_DIRECTORY;
import static com.facebook.presto.hive.metastore.HivePrivilegeInfo.HivePrivilege.OWNERSHIP;
import static com.facebook.presto.hive.metastore.MetastoreUtil.PRESTO_QUERY_ID_NAME;
import static com.facebook.presto.hive.metastore.MetastoreUtil.convertPredicateToParts;
import static com.facebook.presto.hive.metastore.MetastoreUtil.createDirectory;
import static com.facebook.presto.hive.metastore.MetastoreUtil.getFileSystem;
import static com.facebook.presto.hive.metastore.MetastoreUtil.isPrestoView;
import static com.facebook.presto.hive.metastore.MetastoreUtil.pathExists;
import static com.facebook.presto.hive.metastore.MetastoreUtil.renameFile;
import static com.facebook.presto.hive.metastore.MetastoreUtil.toPartitionValues;
import static com.facebook.presto.hive.metastore.PrestoTableType.MANAGED_TABLE;
import static com.facebook.presto.hive.metastore.PrestoTableType.TEMPORARY_TABLE;
import static com.facebook.presto.hive.metastore.PrestoTableType.VIRTUAL_VIEW;
import static com.facebook.presto.hive.metastore.Statistics.ReduceOperator.SUBTRACT;
import static com.facebook.presto.hive.metastore.Statistics.merge;
import static com.facebook.presto.hive.metastore.Statistics.reduce;
import static com.facebook.presto.spi.StandardErrorCode.ALREADY_EXISTS;
import static com.facebook.presto.spi.StandardErrorCode.NOT_SUPPORTED;
import static com.facebook.presto.spi.StandardErrorCode.TRANSACTION_CONFLICT;
import static com.facebook.presto.spi.security.PrincipalType.USER;
import static com.google.common.base.MoreObjects.toStringHelper;
import static com.google.common.base.Preconditions.checkArgument;
import static com.google.common.base.Preconditions.checkState;
import static com.google.common.base.Verify.verify;
import static com.google.common.collect.ImmutableList.toImmutableList;
import static com.google.common.util.concurrent.Futures.whenAllSucceed;
import static com.google.common.util.concurrent.MoreExecutors.directExecutor;
import static java.lang.String.format;
import static java.util.Objects.requireNonNull;
import static java.util.stream.Collectors.toList;
import static org.apache.hadoop.hive.common.FileUtils.makePartName;
public class SemiTransactionalHiveMetastore
{
private static final Logger log = Logger.get(SemiTransactionalHiveMetastore.class);
private static final int PARTITION_COMMIT_BATCH_SIZE = 8;
private final ExtendedHiveMetastore delegate;
private final HdfsEnvironment hdfsEnvironment;
private final ListeningExecutorService renameExecutor;
private final boolean skipDeletionForAlter;
private final boolean skipTargetCleanupOnRollback;
@GuardedBy("this")
private final Map> tableActions = new HashMap<>();
@GuardedBy("this")
private final Map, Action>> partitionActions = new HashMap<>();
@GuardedBy("this")
private final List declaredIntentionsToWrite = new ArrayList<>();
@GuardedBy("this")
private ExclusiveOperation bufferedExclusiveOperation;
@GuardedBy("this")
private State state = State.EMPTY;
private boolean throwOnCleanupFailure;
public SemiTransactionalHiveMetastore(
HdfsEnvironment hdfsEnvironment,
ExtendedHiveMetastore delegate,
ListeningExecutorService renameExecutor,
boolean skipDeletionForAlter,
boolean skipTargetCleanupOnRollback)
{
this.hdfsEnvironment = requireNonNull(hdfsEnvironment, "hdfsEnvironment is null");
this.delegate = requireNonNull(delegate, "delegate is null");
this.renameExecutor = requireNonNull(renameExecutor, "renameExecutor is null");
this.skipDeletionForAlter = skipDeletionForAlter;
this.skipTargetCleanupOnRollback = skipTargetCleanupOnRollback;
}
public synchronized List getAllDatabases()
{
checkReadable();
return delegate.getAllDatabases();
}
public synchronized Optional getDatabase(String databaseName)
{
checkReadable();
return delegate.getDatabase(databaseName);
}
public synchronized Optional> getAllTables(String databaseName)
{
checkReadable();
if (!tableActions.isEmpty()) {
throw new UnsupportedOperationException("Listing all tables after adding/dropping/altering tables/views in a transaction is not supported");
}
return delegate.getAllTables(databaseName);
}
public synchronized Optional
getTable(String databaseName, String tableName)
{
checkReadable();
Action tableAction = tableActions.get(new SchemaTableName(databaseName, tableName));
if (tableAction == null) {
return delegate.getTable(databaseName, tableName);
}
switch (tableAction.getType()) {
case ADD:
case ALTER:
case INSERT_EXISTING:
return Optional.of(tableAction.getData().getAugmentedTableForInTransactionRead());
case DROP:
return Optional.empty();
default:
throw new IllegalStateException("Unknown action type");
}
}
public synchronized Set getSupportedColumnStatistics(Type type)
{
return delegate.getSupportedColumnStatistics(type);
}
public synchronized PartitionStatistics getTableStatistics(String databaseName, String tableName)
{
checkReadable();
Action tableAction = tableActions.get(new SchemaTableName(databaseName, tableName));
if (tableAction == null) {
return delegate.getTableStatistics(databaseName, tableName);
}
switch (tableAction.getType()) {
case ADD:
case ALTER:
case INSERT_EXISTING:
return tableAction.getData().getStatistics();
case DROP:
return PartitionStatistics.empty();
default:
throw new IllegalStateException("Unknown action type");
}
}
public synchronized Map getPartitionStatistics(String databaseName, String tableName, Set partitionNames)
{
checkReadable();
Optional
table = getTable(databaseName, tableName);
if (!table.isPresent()) {
return ImmutableMap.of();
}
TableSource tableSource = getTableSource(databaseName, tableName);
Map, Action> partitionActionsOfTable = partitionActions.computeIfAbsent(new SchemaTableName(databaseName, tableName), k -> new HashMap<>());
ImmutableSet.Builder partitionNamesToQuery = ImmutableSet.builder();
ImmutableMap.Builder resultBuilder = ImmutableMap.builder();
for (String partitionName : partitionNames) {
List partitionValues = toPartitionValues(partitionName);
Action partitionAction = partitionActionsOfTable.get(partitionValues);
if (partitionAction == null) {
switch (tableSource) {
case PRE_EXISTING_TABLE:
partitionNamesToQuery.add(partitionName);
break;
case CREATED_IN_THIS_TRANSACTION:
resultBuilder.put(partitionName, PartitionStatistics.empty());
break;
default:
throw new UnsupportedOperationException("unknown table source");
}
}
else {
resultBuilder.put(partitionName, partitionAction.getData().getStatistics());
}
}
Map delegateResult = delegate.getPartitionStatistics(databaseName, tableName, partitionNamesToQuery.build());
if (!delegateResult.isEmpty()) {
resultBuilder.putAll(delegateResult);
}
else {
partitionNamesToQuery.build().forEach(partitionName -> resultBuilder.put(partitionName, PartitionStatistics.empty()));
}
return resultBuilder.build();
}
/**
* This method can only be called when the table is known to exist
*/
@GuardedBy("this")
private TableSource getTableSource(String databaseName, String tableName)
{
checkHoldsLock();
checkReadable();
Action tableAction = tableActions.get(new SchemaTableName(databaseName, tableName));
if (tableAction == null) {
return TableSource.PRE_EXISTING_TABLE;
}
switch (tableAction.getType()) {
case ADD:
return TableSource.CREATED_IN_THIS_TRANSACTION;
case ALTER:
throw new IllegalStateException("Tables are never altered in the current implementation");
case DROP:
throw new TableNotFoundException(new SchemaTableName(databaseName, tableName));
case INSERT_EXISTING:
return TableSource.PRE_EXISTING_TABLE;
default:
throw new IllegalStateException("Unknown action type");
}
}
public synchronized HivePageSinkMetadata generatePageSinkMetadata(SchemaTableName schemaTableName)
{
checkReadable();
Optional
table = getTable(schemaTableName.getSchemaName(), schemaTableName.getTableName());
if (!table.isPresent()) {
return new HivePageSinkMetadata(schemaTableName, Optional.empty(), ImmutableMap.of());
}
Map, Action> partitionActionMap = partitionActions.get(schemaTableName);
Map, Optional> modifiedPartitionMap;
if (partitionActionMap == null) {
modifiedPartitionMap = ImmutableMap.of();
}
else {
ImmutableMap.Builder, Optional> modifiedPartitionMapBuilder = ImmutableMap.builder();
for (Map.Entry, Action> entry : partitionActionMap.entrySet()) {
modifiedPartitionMapBuilder.put(entry.getKey(), getPartitionFromPartitionAction(entry.getValue()));
}
modifiedPartitionMap = modifiedPartitionMapBuilder.build();
}
return new HivePageSinkMetadata(
schemaTableName,
table,
modifiedPartitionMap);
}
public synchronized Optional> getAllViews(String databaseName)
{
checkReadable();
if (!tableActions.isEmpty()) {
throw new UnsupportedOperationException("Listing all tables after adding/dropping/altering tables/views in a transaction is not supported");
}
return delegate.getAllViews(databaseName);
}
public synchronized void createDatabase(Database database)
{
setExclusive((delegate, hdfsEnvironment) -> delegate.createDatabase(database));
}
public synchronized void dropDatabase(String schemaName)
{
setExclusive((delegate, hdfsEnvironment) -> delegate.dropDatabase(schemaName));
}
public synchronized void renameDatabase(String source, String target)
{
setExclusive((delegate, hdfsEnvironment) -> delegate.renameDatabase(source, target));
}
// TODO: Allow updating statistics for 2 tables in the same transaction
public synchronized void setTableStatistics(Table table, PartitionStatistics tableStatistics)
{
setExclusive((delegate, hdfsEnvironment) ->
delegate.updateTableStatistics(table.getDatabaseName(), table.getTableName(), statistics -> updatePartitionStatistics(statistics, tableStatistics)));
}
// TODO: Allow updating statistics for 2 tables in the same transaction
public synchronized void setPartitionStatistics(Table table, Map, PartitionStatistics> partitionStatisticsMap)
{
setExclusive((delegate, hdfsEnvironment) ->
partitionStatisticsMap.forEach((partitionValues, newPartitionStats) ->
delegate.updatePartitionStatistics(
table.getDatabaseName(),
table.getTableName(),
getPartitionName(table, partitionValues),
oldPartitionStats -> updatePartitionStatistics(oldPartitionStats, newPartitionStats))));
}
// For HiveBasicStatistics, we only overwrite the original statistics if the new one is not empty.
// For HiveColumnStatistics, we always overwrite every statistics.
// TODO: Collect file count, on-disk size and in-memory size during ANALYZE
private PartitionStatistics updatePartitionStatistics(PartitionStatistics oldPartitionStats, PartitionStatistics newPartitionStats)
{
HiveBasicStatistics oldBasicStatistics = oldPartitionStats.getBasicStatistics();
HiveBasicStatistics newBasicStatistics = newPartitionStats.getBasicStatistics();
HiveBasicStatistics updatedBasicStatistics = new HiveBasicStatistics(
firstPresent(newBasicStatistics.getFileCount(), oldBasicStatistics.getFileCount()),
firstPresent(newBasicStatistics.getRowCount(), oldBasicStatistics.getRowCount()),
firstPresent(newBasicStatistics.getInMemoryDataSizeInBytes(), oldBasicStatistics.getInMemoryDataSizeInBytes()),
firstPresent(newBasicStatistics.getOnDiskDataSizeInBytes(), oldBasicStatistics.getOnDiskDataSizeInBytes()));
return new PartitionStatistics(updatedBasicStatistics, newPartitionStats.getColumnStatistics());
}
private static OptionalLong firstPresent(OptionalLong first, OptionalLong second)
{
return first.isPresent() ? first : second;
}
/**
* {@code currentLocation} needs to be supplied if a writePath exists for the table.
*/
public synchronized void createTable(
ConnectorSession session,
Table table,
PrincipalPrivileges principalPrivileges,
Optional currentPath,
boolean ignoreExisting,
PartitionStatistics statistics)
{
setShared();
// When creating a table, it should never have partition actions. This is just a sanity check.
checkNoPartitionAction(table.getDatabaseName(), table.getTableName());
SchemaTableName schemaTableName = new SchemaTableName(table.getDatabaseName(), table.getTableName());
Action oldTableAction = tableActions.get(schemaTableName);
TableAndMore tableAndMore = new TableAndMore(table, Optional.of(principalPrivileges), currentPath, Optional.empty(), ignoreExisting, statistics, statistics);
if (oldTableAction == null) {
HdfsContext context = new HdfsContext(session, table.getDatabaseName(), table.getTableName());
tableActions.put(schemaTableName, new Action<>(ActionType.ADD, tableAndMore, context));
return;
}
switch (oldTableAction.getType()) {
case DROP:
throw new PrestoException(TRANSACTION_CONFLICT, "Dropping and then recreating the same table in a transaction is not supported");
case ADD:
case ALTER:
case INSERT_EXISTING:
throw new TableAlreadyExistsException(schemaTableName);
default:
throw new IllegalStateException("Unknown action type");
}
}
public synchronized void dropTable(ConnectorSession session, String databaseName, String tableName)
{
setShared();
// Dropping table with partition actions requires cleaning up staging data, which is not implemented yet.
checkNoPartitionAction(databaseName, tableName);
SchemaTableName schemaTableName = new SchemaTableName(databaseName, tableName);
Action oldTableAction = tableActions.get(schemaTableName);
if (oldTableAction == null || oldTableAction.getType() == ActionType.ALTER) {
HdfsContext context = new HdfsContext(session, databaseName, tableName);
tableActions.put(schemaTableName, new Action<>(ActionType.DROP, null, context));
return;
}
switch (oldTableAction.getType()) {
case DROP:
throw new TableNotFoundException(schemaTableName);
case ADD:
case ALTER:
case INSERT_EXISTING:
throw new UnsupportedOperationException("dropping a table added/modified in the same transaction is not supported");
default:
throw new IllegalStateException("Unknown action type");
}
}
public synchronized void replaceView(String databaseName, String tableName, Table table, PrincipalPrivileges principalPrivileges)
{
setExclusive((delegate, hdfsEnvironment) -> delegate.replaceTable(databaseName, tableName, table, principalPrivileges));
}
public synchronized void renameTable(String databaseName, String tableName, String newDatabaseName, String newTableName)
{
setExclusive((delegate, hdfsEnvironment) -> delegate.renameTable(databaseName, tableName, newDatabaseName, newTableName));
}
public synchronized void addColumn(String databaseName, String tableName, String columnName, HiveType columnType, String columnComment)
{
setExclusive((delegate, hdfsEnvironment) -> delegate.addColumn(databaseName, tableName, columnName, columnType, columnComment));
}
public synchronized void renameColumn(String databaseName, String tableName, String oldColumnName, String newColumnName)
{
setExclusive((delegate, hdfsEnvironment) -> delegate.renameColumn(databaseName, tableName, oldColumnName, newColumnName));
}
public synchronized void dropColumn(String databaseName, String tableName, String columnName)
{
setExclusive((delegate, hdfsEnvironment) -> delegate.dropColumn(databaseName, tableName, columnName));
}
public synchronized void finishInsertIntoExistingTable(
ConnectorSession session,
String databaseName,
String tableName,
Path currentLocation,
List fileNames,
PartitionStatistics statisticsUpdate)
{
// Data can only be inserted into partitions and unpartitioned tables. They can never be inserted into a partitioned table.
// Therefore, this method assumes that the table is unpartitioned.
setShared();
SchemaTableName schemaTableName = new SchemaTableName(databaseName, tableName);
Action oldTableAction = tableActions.get(schemaTableName);
if (oldTableAction == null || oldTableAction.getData().getTable().getTableType().equals(TEMPORARY_TABLE)) {
Table table = getTable(databaseName, tableName)
.orElseThrow(() -> new TableNotFoundException(schemaTableName));
PartitionStatistics currentStatistics = getTableStatistics(databaseName, tableName);
HdfsContext context = new HdfsContext(session, databaseName, tableName);
tableActions.put(
schemaTableName,
new Action<>(
ActionType.INSERT_EXISTING,
new TableAndMore(
table,
Optional.empty(),
Optional.of(currentLocation),
Optional.of(fileNames),
false,
merge(currentStatistics, statisticsUpdate),
statisticsUpdate),
context));
return;
}
switch (oldTableAction.getType()) {
case DROP:
throw new TableNotFoundException(schemaTableName);
case ADD:
case ALTER:
case INSERT_EXISTING:
throw new UnsupportedOperationException("Inserting into an unpartitioned table that were added, altered, or inserted into in the same transaction is not supported");
default:
throw new IllegalStateException("Unknown action type");
}
}
public synchronized void truncateUnpartitionedTable(ConnectorSession session, String databaseName, String tableName)
{
checkReadable();
Optional
table = getTable(databaseName, tableName);
SchemaTableName schemaTableName = new SchemaTableName(databaseName, tableName);
if (!table.isPresent()) {
throw new TableNotFoundException(schemaTableName);
}
if (!table.get().getTableType().equals(MANAGED_TABLE)) {
throw new PrestoException(NOT_SUPPORTED, "Cannot delete from non-managed Hive table");
}
if (!table.get().getPartitionColumns().isEmpty()) {
throw new IllegalArgumentException("Table is partitioned");
}
Path path = new Path(table.get().getStorage().getLocation());
HdfsContext context = new HdfsContext(session, databaseName, tableName);
setExclusive((delegate, hdfsEnvironment) -> {
RecursiveDeleteResult recursiveDeleteResult = recursiveDeleteFiles(hdfsEnvironment, context, path, ImmutableList.of(""), false);
if (!recursiveDeleteResult.getNotDeletedEligibleItems().isEmpty()) {
throw new PrestoException(HIVE_FILESYSTEM_ERROR, format(
"Error deleting from unpartitioned table %s. These items can not be deleted: %s",
schemaTableName,
recursiveDeleteResult.getNotDeletedEligibleItems()));
}
});
}
public synchronized Optional> getPartitionNames(String databaseName, String tableName)
{
return doGetPartitionNames(databaseName, tableName, ImmutableMap.of());
}
public synchronized Optional> getPartitionNamesByFilter(String databaseName, String tableName, Map effectivePredicate)
{
return doGetPartitionNames(databaseName, tableName, effectivePredicate);
}
@GuardedBy("this")
private Optional> doGetPartitionNames(
String databaseName,
String tableName,
Map partitionPredicates)
{
checkHoldsLock();
checkReadable();
Optional
table = getTable(databaseName, tableName);
if (!table.isPresent()) {
return Optional.empty();
}
List partitionNames;
TableSource tableSource = getTableSource(databaseName, tableName);
switch (tableSource) {
case CREATED_IN_THIS_TRANSACTION:
partitionNames = ImmutableList.of();
break;
case PRE_EXISTING_TABLE: {
Optional> partitionNameResult;
List partitionColumns = table.get().getPartitionColumns();
if (!partitionPredicates.isEmpty()) {
partitionNameResult = Optional.of(delegate.getPartitionNamesByFilter(databaseName, tableName, partitionPredicates));
}
else {
partitionNameResult = delegate.getPartitionNames(databaseName, tableName);
}
if (!partitionNameResult.isPresent()) {
throw new PrestoException(TRANSACTION_CONFLICT, format("Table %s.%s was dropped by another transaction", databaseName, tableName));
}
partitionNames = partitionNameResult.get();
break;
}
default:
throw new UnsupportedOperationException("Unknown table source");
}
Map, Action> partitionActionsOfTable = partitionActions.computeIfAbsent(new SchemaTableName(databaseName, tableName), k -> new HashMap<>());
ImmutableList.Builder resultBuilder = ImmutableList.builder();
// alter/remove newly-altered/dropped partitions from the results from underlying metastore
for (String partitionName : partitionNames) {
List partitionValues = toPartitionValues(partitionName);
Action partitionAction = partitionActionsOfTable.get(partitionValues);
if (partitionAction == null) {
resultBuilder.add(partitionName);
continue;
}
switch (partitionAction.getType()) {
case ADD:
throw new PrestoException(TRANSACTION_CONFLICT, format("Another transaction created partition %s in table %s.%s", partitionValues, databaseName, tableName));
case DROP:
// do nothing
break;
case ALTER:
case INSERT_EXISTING:
resultBuilder.add(partitionName);
break;
default:
throw new IllegalStateException("Unknown action type");
}
}
// add newly-added partitions to the results from underlying metastore
if (!partitionActionsOfTable.isEmpty()) {
List partitionColumns = table.get().getPartitionColumns();
List partitionColumnNames = partitionColumns.stream().map(Column::getName).collect(toList());
List parts = convertPredicateToParts(partitionPredicates);
for (Action partitionAction : partitionActionsOfTable.values()) {
if (partitionAction.getType() == ActionType.ADD) {
List values = partitionAction.getData().getPartition().getValues();
if (parts.isEmpty() || partitionValuesMatch(values, parts)) {
resultBuilder.add(makePartName(partitionColumnNames, values));
}
}
}
}
return Optional.of(resultBuilder.build());
}
private static boolean partitionValuesMatch(List values, List pattern)
{
checkArgument(values.size() == pattern.size());
for (int i = 0; i < values.size(); i++) {
if (pattern.get(i).isEmpty()) {
// empty string match everything
continue;
}
if (values.get(i).equals(pattern.get(i))) {
return false;
}
}
return true;
}
public synchronized Optional getPartition(String databaseName, String tableName, List partitionValues)
{
checkReadable();
TableSource tableSource = getTableSource(databaseName, tableName);
Map, Action> partitionActionsOfTable = partitionActions.computeIfAbsent(new SchemaTableName(databaseName, tableName), k -> new HashMap<>());
Action partitionAction = partitionActionsOfTable.get(partitionValues);
if (partitionAction != null) {
return getPartitionFromPartitionAction(partitionAction);
}
switch (tableSource) {
case PRE_EXISTING_TABLE:
return delegate.getPartition(databaseName, tableName, partitionValues);
case CREATED_IN_THIS_TRANSACTION:
return Optional.empty();
default:
throw new UnsupportedOperationException("unknown table source");
}
}
public synchronized Map> getPartitionsByNames(String databaseName, String tableName, List partitionNames)
{
checkReadable();
TableSource tableSource = getTableSource(databaseName, tableName);
Map, Action> partitionActionsOfTable = partitionActions.computeIfAbsent(new SchemaTableName(databaseName, tableName), k -> new HashMap<>());
ImmutableList.Builder partitionNamesToQuery = ImmutableList.builder();
ImmutableMap.Builder> resultBuilder = ImmutableMap.builder();
for (String partitionName : partitionNames) {
List partitionValues = toPartitionValues(partitionName);
Action partitionAction = partitionActionsOfTable.get(partitionValues);
if (partitionAction == null) {
switch (tableSource) {
case PRE_EXISTING_TABLE:
partitionNamesToQuery.add(partitionName);
break;
case CREATED_IN_THIS_TRANSACTION:
resultBuilder.put(partitionName, Optional.empty());
break;
default:
throw new UnsupportedOperationException("unknown table source");
}
}
else {
resultBuilder.put(partitionName, getPartitionFromPartitionAction(partitionAction));
}
}
Map> delegateResult = delegate.getPartitionsByNames(databaseName, tableName, partitionNamesToQuery.build());
resultBuilder.putAll(delegateResult);
return resultBuilder.build();
}
private static Optional getPartitionFromPartitionAction(Action partitionAction)
{
switch (partitionAction.getType()) {
case ADD:
case ALTER:
case INSERT_EXISTING:
return Optional.of(partitionAction.getData().getAugmentedPartitionForInTransactionRead());
case DROP:
return Optional.empty();
default:
throw new IllegalStateException("Unknown action type");
}
}
public synchronized void addPartition(
ConnectorSession session,
String databaseName,
String tableName,
Partition partition,
Path currentLocation,
PartitionStatistics statistics)
{
setShared();
checkArgument(getPrestoQueryId(partition).isPresent());
Map, Action> partitionActionsOfTable = partitionActions.computeIfAbsent(new SchemaTableName(databaseName, tableName), k -> new HashMap<>());
Action oldPartitionAction = partitionActionsOfTable.get(partition.getValues());
HdfsContext context = new HdfsContext(session, databaseName, tableName);
if (oldPartitionAction == null) {
partitionActionsOfTable.put(
partition.getValues(),
new Action<>(ActionType.ADD, new PartitionAndMore(partition, currentLocation, Optional.empty(), statistics, statistics), context));
return;
}
switch (oldPartitionAction.getType()) {
case DROP: {
if (!oldPartitionAction.getContext().getIdentity().getUser().equals(session.getUser())) {
throw new PrestoException(TRANSACTION_CONFLICT, "Operation on the same partition with different user in the same transaction is not supported");
}
partitionActionsOfTable.put(
partition.getValues(),
new Action<>(ActionType.ALTER, new PartitionAndMore(partition, currentLocation, Optional.empty(), statistics, statistics), context));
break;
}
case ADD:
case ALTER:
case INSERT_EXISTING:
throw new PrestoException(ALREADY_EXISTS, format("Partition already exists for table '%s.%s': %s", databaseName, tableName, partition.getValues()));
default:
throw new IllegalStateException("Unknown action type");
}
}
public synchronized void dropPartition(ConnectorSession session, String databaseName, String tableName, List partitionValues)
{
setShared();
Map, Action> partitionActionsOfTable = partitionActions.computeIfAbsent(new SchemaTableName(databaseName, tableName), k -> new HashMap<>());
Action oldPartitionAction = partitionActionsOfTable.get(partitionValues);
if (oldPartitionAction == null) {
HdfsContext context = new HdfsContext(session, databaseName, tableName);
partitionActionsOfTable.put(partitionValues, new Action<>(ActionType.DROP, null, context));
return;
}
switch (oldPartitionAction.getType()) {
case DROP:
throw new PartitionNotFoundException(new SchemaTableName(databaseName, tableName), partitionValues);
case ADD:
case ALTER:
case INSERT_EXISTING:
throw new PrestoException(
NOT_SUPPORTED,
format("dropping a partition added in the same transaction is not supported: %s %s %s", databaseName, tableName, partitionValues));
default:
throw new IllegalStateException("Unknown action type");
}
}
public synchronized void finishInsertIntoExistingPartition(
ConnectorSession session,
String databaseName,
String tableName,
List partitionValues,
Path currentLocation,
List fileNames,
PartitionStatistics statisticsUpdate)
{
setShared();
SchemaTableName schemaTableName = new SchemaTableName(databaseName, tableName);
Map, Action> partitionActionsOfTable = partitionActions.computeIfAbsent(schemaTableName, k -> new HashMap<>());
Action oldPartitionAction = partitionActionsOfTable.get(partitionValues);
if (oldPartitionAction == null) {
Partition partition = delegate.getPartition(databaseName, tableName, partitionValues)
.orElseThrow(() -> new PartitionNotFoundException(schemaTableName, partitionValues));
String partitionName = getPartitionName(databaseName, tableName, partitionValues);
PartitionStatistics currentStatistics = delegate.getPartitionStatistics(databaseName, tableName, ImmutableSet.of(partitionName)).get(partitionName);
if (currentStatistics == null) {
throw new PrestoException(HIVE_METASTORE_ERROR, "currentStatistics is null");
}
HdfsContext context = new HdfsContext(session, databaseName, tableName);
partitionActionsOfTable.put(
partitionValues,
new Action<>(
ActionType.INSERT_EXISTING,
new PartitionAndMore(
partition,
currentLocation,
Optional.of(fileNames),
merge(currentStatistics, statisticsUpdate),
statisticsUpdate),
context));
return;
}
switch (oldPartitionAction.getType()) {
case DROP:
throw new PartitionNotFoundException(schemaTableName, partitionValues);
case ADD:
case ALTER:
case INSERT_EXISTING:
throw new UnsupportedOperationException("Inserting into a partition that were added, altered, or inserted into in the same transaction is not supported");
default:
throw new IllegalStateException("Unknown action type");
}
}
private String getPartitionName(String databaseName, String tableName, List partitionValues)
{
Table table = getTable(databaseName, tableName)
.orElseThrow(() -> new TableNotFoundException(new SchemaTableName(databaseName, tableName)));
return getPartitionName(table, partitionValues);
}
private String getPartitionName(Table table, List partitionValues)
{
List columnNames = table.getPartitionColumns().stream()
.map(Column::getName)
.collect(toImmutableList());
return makePartName(columnNames, partitionValues);
}
public synchronized void createRole(String role, String grantor)
{
setExclusive((delegate, hdfsEnvironment) -> delegate.createRole(role, grantor));
}
public synchronized void dropRole(String role)
{
setExclusive((delegate, hdfsEnvironment) -> delegate.dropRole(role));
}
public synchronized Set listRoles()
{
checkReadable();
return delegate.listRoles();
}
public synchronized void grantRoles(Set roles, Set grantees, boolean withAdminOption, PrestoPrincipal grantor)
{
setExclusive((delegate, hdfsEnvironment) -> delegate.grantRoles(roles, grantees, withAdminOption, grantor));
}
public synchronized void revokeRoles(Set roles, Set grantees, boolean adminOptionFor, PrestoPrincipal grantor)
{
setExclusive((delegate, hdfsEnvironment) -> delegate.revokeRoles(roles, grantees, adminOptionFor, grantor));
}
public synchronized Set listRoleGrants(PrestoPrincipal principal)
{
checkReadable();
return delegate.listRoleGrants(principal);
}
public synchronized Set listTablePrivileges(String databaseName, String tableName, PrestoPrincipal principal)
{
checkReadable();
SchemaTableName schemaTableName = new SchemaTableName(databaseName, tableName);
Action tableAction = tableActions.get(schemaTableName);
if (tableAction == null) {
return delegate.listTablePrivileges(databaseName, tableName, principal);
}
switch (tableAction.getType()) {
case ADD:
case ALTER: {
if (principal.getType() == PrincipalType.ROLE) {
return ImmutableSet.of();
}
if (!principal.getName().equals(tableAction.getData().getTable().getOwner())) {
return ImmutableSet.of();
}
Collection privileges = tableAction.getData().getPrincipalPrivileges().getUserPrivileges().get(principal.getName());
return ImmutableSet.builder()
.addAll(privileges)
.add(new HivePrivilegeInfo(OWNERSHIP, true, new PrestoPrincipal(USER, principal.getName()), new PrestoPrincipal(USER, principal.getName())))
.build();
}
case INSERT_EXISTING:
return delegate.listTablePrivileges(databaseName, tableName, principal);
case DROP:
throw new TableNotFoundException(schemaTableName);
default:
throw new IllegalStateException("Unknown action type");
}
}
public synchronized void grantTablePrivileges(String databaseName, String tableName, PrestoPrincipal grantee, Set privileges)
{
setExclusive((delegate, hdfsEnvironment) -> delegate.grantTablePrivileges(databaseName, tableName, grantee, privileges));
}
public synchronized void revokeTablePrivileges(String databaseName, String tableName, PrestoPrincipal grantee, Set privileges)
{
setExclusive((delegate, hdfsEnvironment) -> delegate.revokeTablePrivileges(databaseName, tableName, grantee, privileges));
}
public synchronized void declareIntentionToWrite(
ConnectorSession session,
WriteMode writeMode,
Path stagingPathRoot,
Optional tempPathRoot,
String filePrefix,
SchemaTableName schemaTableName,
boolean temporaryTable)
{
setShared();
if (writeMode == WriteMode.DIRECT_TO_TARGET_EXISTING_DIRECTORY) {
Map, Action> partitionActionsOfTable = partitionActions.get(schemaTableName);
if (partitionActionsOfTable != null && !partitionActionsOfTable.isEmpty()) {
throw new PrestoException(NOT_SUPPORTED, "Can not insert into a table with a partition that has been modified in the same transaction when Presto is configured to skip temporary directories.");
}
}
HdfsContext context = new HdfsContext(session, schemaTableName.getSchemaName(), schemaTableName.getTableName());
declaredIntentionsToWrite.add(new DeclaredIntentionToWrite(writeMode, context, stagingPathRoot, tempPathRoot, filePrefix, schemaTableName, temporaryTable));
}
public synchronized void commit()
{
try {
switch (state) {
case EMPTY:
break;
case SHARED_OPERATION_BUFFERED:
commitShared();
break;
case EXCLUSIVE_OPERATION_BUFFERED:
requireNonNull(bufferedExclusiveOperation, "bufferedExclusiveOperation is null");
bufferedExclusiveOperation.execute(delegate, hdfsEnvironment);
break;
case FINISHED:
throw new IllegalStateException("Tried to commit buffered metastore operations after transaction has been committed/aborted");
default:
throw new IllegalStateException("Unknown state");
}
}
finally {
state = State.FINISHED;
}
}
public synchronized void rollback()
{
try {
switch (state) {
case EMPTY:
case EXCLUSIVE_OPERATION_BUFFERED:
break;
case SHARED_OPERATION_BUFFERED:
rollbackShared();
break;
case FINISHED:
throw new IllegalStateException("Tried to rollback buffered metastore operations after transaction has been committed/aborted");
default:
throw new IllegalStateException("Unknown state");
}
}
finally {
state = State.FINISHED;
}
}
@GuardedBy("this")
private void commitShared()
{
checkHoldsLock();
Committer committer = new Committer();
try {
for (Map.Entry> entry : tableActions.entrySet()) {
SchemaTableName schemaTableName = entry.getKey();
Action action = entry.getValue();
switch (action.getType()) {
case DROP:
committer.prepareDropTable(schemaTableName);
break;
case ALTER:
committer.prepareAlterTable();
break;
case ADD:
committer.prepareAddTable(action.getContext(), action.getData());
break;
case INSERT_EXISTING:
committer.prepareInsertExistingTable(action.getContext(), action.getData());
break;
default:
throw new IllegalStateException("Unknown action type");
}
}
for (Map.Entry, Action>> tableEntry : partitionActions.entrySet()) {
SchemaTableName schemaTableName = tableEntry.getKey();
for (Map.Entry, Action> partitionEntry : tableEntry.getValue().entrySet()) {
List partitionValues = partitionEntry.getKey();
Action action = partitionEntry.getValue();
switch (action.getType()) {
case DROP:
committer.prepareDropPartition(schemaTableName, partitionValues);
break;
case ALTER:
committer.prepareAlterPartition(action.getContext(), action.getData());
break;
case ADD:
committer.prepareAddPartition(action.getContext(), action.getData());
break;
case INSERT_EXISTING:
committer.prepareInsertExistingPartition(action.getContext(), action.getData());
break;
default:
throw new IllegalStateException("Unknown action type");
}
}
}
// Wait for all renames submitted for "INSERT_EXISTING" action to finish
ListenableFuture listenableFutureAggregate = whenAllSucceed(committer.getFileRenameFutures()).call(() -> null, directExecutor());
try {
getFutureValue(listenableFutureAggregate, PrestoException.class);
}
catch (RuntimeException e) {
listenableFutureAggregate.cancel(true);
throw e;
}
// At this point, all file system operations, whether asynchronously issued or not, have completed successfully.
// We are moving on to metastore operations now.
committer.executeAddTableOperations();
committer.executeAlterPartitionOperations();
committer.executeAddPartitionOperations();
committer.executeUpdateStatisticsOperations();
}
catch (Throwable t) {
committer.cancelUnstartedAsyncRenames();
committer.undoUpdateStatisticsOperations();
committer.undoAddPartitionOperations();
committer.undoAddTableOperations();
committer.waitForAsyncRenamesSuppressThrowables();
// fileRenameFutures must all come back before any file system cleanups are carried out.
// Otherwise, files that should be deleted may be created after cleanup is done.
committer.executeCleanupTasksForAbort(committer.extractFilePrefixes(declaredIntentionsToWrite));
committer.executeRenameTasksForAbort();
// Partition directory must be put back before relevant metastore operation can be undone
committer.undoAlterPartitionOperations();
rollbackShared();
throw t;
}
try {
// After this line, operations are no longer reversible.
// The next section will deal with "dropping table/partition". Commit may still fail in
// this section. Even if commit fails, cleanups, instead of rollbacks, will be executed.
if (!committer.metastoreDeleteOperations.isEmpty()) {
committer.executeMetastoreDeleteOperations();
}
// If control flow reached this point, this commit is considered successful no matter
// what happens later. The only kind of operations that haven't been carried out yet
// are cleanups.
// The program control flow will go to finally next. And cleanup will run because
// moveForwardInFinally has been set to false.
}
finally {
// In this method, all operations are best-effort clean up operations.
// If any operation fails, the error will be logged and ignored.
// Additionally, other clean up operations should still be attempted.
// Execute deletion tasks
committer.executeDeletionTasksForFinish();
// Clean up temporary tables
deleteTemporaryTableDirectories(declaredIntentionsToWrite, hdfsEnvironment);
// Clean up empty staging directories (that may recursively contain empty directories)
committer.deleteEmptyStagingDirectories(declaredIntentionsToWrite);
// Clean up root temp directories
deleteTempPathRootDirectory(declaredIntentionsToWrite, hdfsEnvironment);
}
}
private class Committer
{
private final AtomicBoolean fileRenameCancelled = new AtomicBoolean(false);
private final List> fileRenameFutures = new ArrayList<>();
// File system
// For file system changes, only operations outside of writing paths (as specified in declared intentions to write)
// need to MOVE_BACKWARD tasks scheduled. Files in writing paths are handled by rollbackShared().
private final List deletionTasksForFinish = new ArrayList<>();
private final List cleanUpTasksForAbort = new ArrayList<>();
private final List renameTasksForAbort = new ArrayList<>();
// Metastore
private final List addTableOperations = new ArrayList<>();
private final Map partitionAdders = new HashMap<>();
private final List alterPartitionOperations = new ArrayList<>();
private final List updateStatisticsOperations = new ArrayList<>();
private final List metastoreDeleteOperations = new ArrayList<>();
// Flag for better error message
private boolean deleteOnly = true;
private List> getFileRenameFutures()
{
return ImmutableList.copyOf(fileRenameFutures);
}
private void prepareDropTable(SchemaTableName schemaTableName)
{
metastoreDeleteOperations.add(new IrreversibleMetastoreOperation(
format("drop table %s", schemaTableName),
() -> delegate.dropTable(schemaTableName.getSchemaName(), schemaTableName.getTableName(), true)));
}
private void prepareAlterTable()
{
deleteOnly = false;
// Currently, ALTER action is never constructed for tables. Dropping a table and then re-creating it
// in the same transaction is not supported now. The following line should be replaced with actual
// implementation when create after drop support is introduced for a table.
throw new UnsupportedOperationException("Dropping and then creating a table with the same name is not supported");
}
private void prepareAddTable(HdfsContext context, TableAndMore tableAndMore)
{
deleteOnly = false;
Table table = tableAndMore.getTable();
if (table.getTableType().equals(TEMPORARY_TABLE)) {
// do not commit a temporary table to the metastore
return;
}
if (table.getTableType().equals(MANAGED_TABLE)) {
String targetLocation = table.getStorage().getLocation();
checkArgument(!targetLocation.isEmpty(), "target location is empty");
Optional currentPath = tableAndMore.getCurrentLocation();
Path targetPath = new Path(targetLocation);
if (table.getPartitionColumns().isEmpty() && currentPath.isPresent()) {
// CREATE TABLE AS SELECT unpartitioned table
if (targetPath.equals(currentPath.get())) {
// Target path and current path are the same. Therefore, directory move is not needed.
}
else {
renameDirectory(
context,
hdfsEnvironment,
currentPath.get(),
targetPath,
() -> cleanUpTasksForAbort.add(new DirectoryCleanUpTask(context, targetPath, true)));
}
}
else {
// CREATE TABLE AS SELECT partitioned table, or
// CREATE TABLE partitioned/unpartitioned table (without data)
if (pathExists(context, hdfsEnvironment, targetPath)) {
if (currentPath.isPresent() && currentPath.get().equals(targetPath)) {
// It is okay to skip directory creation when currentPath is equal to targetPath
// because the directory may have been created when creating partition directories.
// However, it is important to note that the two being equal does not guarantee
// a directory had been created.
}
else {
throw new PrestoException(
HIVE_PATH_ALREADY_EXISTS,
format("Unable to create directory %s: target directory already exists", targetPath));
}
}
else {
cleanUpTasksForAbort.add(new DirectoryCleanUpTask(context, targetPath, true));
createDirectory(context, hdfsEnvironment, targetPath);
}
}
}
addTableOperations.add(new CreateTableOperation(table, tableAndMore.getPrincipalPrivileges(), tableAndMore.isIgnoreExisting()));
if (!isPrestoView(table)) {
updateStatisticsOperations.add(new UpdateStatisticsOperation(
new SchemaTableName(table.getDatabaseName(), table.getTableName()),
Optional.empty(),
tableAndMore.getStatisticsUpdate(),
false));
}
}
private void prepareInsertExistingTable(HdfsContext context, TableAndMore tableAndMore)
{
deleteOnly = false;
Table table = tableAndMore.getTable();
if (table.getTableType().equals(TEMPORARY_TABLE)) {
// do not commit a temporary table to the metastore
return;
}
Path targetPath = new Path(table.getStorage().getLocation());
Path currentPath = tableAndMore.getCurrentLocation().get();
cleanUpTasksForAbort.add(new DirectoryCleanUpTask(context, targetPath, false));
if (!targetPath.equals(currentPath)) {
asyncRename(hdfsEnvironment, renameExecutor, fileRenameCancelled, fileRenameFutures, context, currentPath, targetPath, tableAndMore.getFileNames().get());
}
updateStatisticsOperations.add(new UpdateStatisticsOperation(
new SchemaTableName(table.getDatabaseName(), table.getTableName()),
Optional.empty(),
tableAndMore.getStatisticsUpdate(),
true));
}
private void prepareDropPartition(SchemaTableName schemaTableName, List partitionValues)
{
metastoreDeleteOperations.add(new IrreversibleMetastoreOperation(
format("drop partition %s.%s %s", schemaTableName.getSchemaName(), schemaTableName.getTableName(), partitionValues),
() -> delegate.dropPartition(schemaTableName.getSchemaName(), schemaTableName.getTableName(), partitionValues, true)));
}
private void prepareAlterPartition(HdfsContext context, PartitionAndMore partitionAndMore)
{
deleteOnly = false;
Partition partition = partitionAndMore.getPartition();
String targetLocation = partition.getStorage().getLocation();
Optional oldPartition = delegate.getPartition(partition.getDatabaseName(), partition.getTableName(), partition.getValues());
if (!oldPartition.isPresent()) {
throw new PrestoException(
TRANSACTION_CONFLICT,
format("The partition that this transaction modified was deleted in another transaction. %s %s", partition.getTableName(), partition.getValues()));
}
String partitionName = getPartitionName(partition.getDatabaseName(), partition.getTableName(), partition.getValues());
PartitionStatistics oldPartitionStatistics = getExistingPartitionStatistics(partition, partitionName);
String oldPartitionLocation = oldPartition.get().getStorage().getLocation();
Path oldPartitionPath = new Path(oldPartitionLocation);
// Location of the old partition and the new partition can be different because we allow arbitrary directories through LocationService.
// If the location of the old partition is the same as the location of the new partition:
// * Rename the old data directory to a temporary path with a special suffix
// * Remember we will need to delete that directory at the end if transaction successfully commits
// * Remember we will need to undo the rename if transaction aborts
// Otherwise,
// * Remember we will need to delete the location of the old partition at the end if transaction successfully commits
if (targetLocation.equals(oldPartitionLocation)) {
Path oldPartitionStagingPath = new Path(oldPartitionPath.getParent(), "_temp_" + oldPartitionPath.getName() + "_" + context.getQueryId());
renameDirectory(
context,
hdfsEnvironment,
oldPartitionPath,
oldPartitionStagingPath,
() -> renameTasksForAbort.add(new DirectoryRenameTask(context, oldPartitionStagingPath, oldPartitionPath)));
if (!skipDeletionForAlter) {
deletionTasksForFinish.add(new DirectoryDeletionTask(context, oldPartitionStagingPath));
}
}
else {
if (!skipDeletionForAlter) {
deletionTasksForFinish.add(new DirectoryDeletionTask(context, oldPartitionPath));
}
}
Path currentPath = partitionAndMore.getCurrentLocation();
Path targetPath = new Path(targetLocation);
if (!targetPath.equals(currentPath)) {
renameDirectory(
context,
hdfsEnvironment,
currentPath,
targetPath,
() -> cleanUpTasksForAbort.add(new DirectoryCleanUpTask(context, targetPath, true)));
}
// Partition alter must happen regardless of whether original and current location is the same
// because metadata might change: e.g. storage format, column types, etc
alterPartitionOperations.add(new AlterPartitionOperation(
new PartitionWithStatistics(partition, partitionName, partitionAndMore.getStatisticsUpdate()),
new PartitionWithStatistics(oldPartition.get(), partitionName, oldPartitionStatistics)));
}
private PartitionStatistics getExistingPartitionStatistics(Partition partition, String partitionName)
{
try {
PartitionStatistics statistics = delegate.getPartitionStatistics(partition.getDatabaseName(), partition.getTableName(), ImmutableSet.of(partitionName))
.get(partitionName);
if (statistics == null) {
throw new PrestoException(
TRANSACTION_CONFLICT,
format("The partition that this transaction modified was deleted in another transaction. %s %s", partition.getTableName(), partition.getValues()));
}
return statistics;
}
catch (PrestoException e) {
if (e.getErrorCode().equals(HIVE_CORRUPTED_COLUMN_STATISTICS.toErrorCode())) {
log.warn(
e,
"Corrupted statistics found when altering partition. Table: %s.%s. Partition: %s",
partition.getDatabaseName(),
partition.getTableName(),
partition.getValues());
return PartitionStatistics.empty();
}
throw e;
}
}
private void prepareAddPartition(HdfsContext context, PartitionAndMore partitionAndMore)
{
deleteOnly = false;
Partition partition = partitionAndMore.getPartition();
String targetLocation = partition.getStorage().getLocation();
Path currentPath = partitionAndMore.getCurrentLocation();
Path targetPath = new Path(targetLocation);
SchemaTableName schemaTableName = new SchemaTableName(partition.getDatabaseName(), partition.getTableName());
PartitionAdder partitionAdder = partitionAdders.computeIfAbsent(
schemaTableName,
ignored -> new PartitionAdder(partition.getDatabaseName(), partition.getTableName(), delegate, PARTITION_COMMIT_BATCH_SIZE));
if (pathExists(context, hdfsEnvironment, currentPath)) {
if (!targetPath.equals(currentPath)) {
renameDirectory(
context,
hdfsEnvironment,
currentPath,
targetPath,
() -> cleanUpTasksForAbort.add(new DirectoryCleanUpTask(context, targetPath, true)));
}
}
else {
cleanUpTasksForAbort.add(new DirectoryCleanUpTask(context, targetPath, true));
createDirectory(context, hdfsEnvironment, targetPath);
}
String partitionName = getPartitionName(partition.getDatabaseName(), partition.getTableName(), partition.getValues());
partitionAdder.addPartition(new PartitionWithStatistics(partition, partitionName, partitionAndMore.getStatisticsUpdate()));
}
private void prepareInsertExistingPartition(HdfsContext context, PartitionAndMore partitionAndMore)
{
deleteOnly = false;
Partition partition = partitionAndMore.getPartition();
Path targetPath = new Path(partition.getStorage().getLocation());
Path currentPath = partitionAndMore.getCurrentLocation();
cleanUpTasksForAbort.add(new DirectoryCleanUpTask(context, targetPath, false));
if (!targetPath.equals(currentPath)) {
asyncRename(hdfsEnvironment, renameExecutor, fileRenameCancelled, fileRenameFutures, context, currentPath, targetPath, partitionAndMore.getFileNames());
}
updateStatisticsOperations.add(new UpdateStatisticsOperation(
new SchemaTableName(partition.getDatabaseName(), partition.getTableName()),
Optional.of(getPartitionName(partition.getDatabaseName(), partition.getTableName(), partition.getValues())),
partitionAndMore.getStatisticsUpdate(),
true));
}
private void executeCleanupTasksForAbort(List filePrefixes)
{
for (DirectoryCleanUpTask cleanUpTask : cleanUpTasksForAbort) {
recursiveDeleteFilesAndLog(cleanUpTask.getContext(), cleanUpTask.getPath(), filePrefixes, cleanUpTask.isDeleteEmptyDirectory(), "temporary directory commit abort");
}
}
private void executeDeletionTasksForFinish()
{
for (DirectoryDeletionTask deletionTask : deletionTasksForFinish) {
if (!deleteRecursivelyIfExists(deletionTask.getContext(), hdfsEnvironment, deletionTask.getPath())) {
logCleanupFailure("Error deleting directory %s", deletionTask.getPath().toString());
}
}
}
private void executeRenameTasksForAbort()
{
for (DirectoryRenameTask directoryRenameTask : renameTasksForAbort) {
try {
// Ignore the task if the source directory doesn't exist.
// This is probably because the original rename that we are trying to undo here never succeeded.
if (pathExists(directoryRenameTask.getContext(), hdfsEnvironment, directoryRenameTask.getRenameFrom())) {
renameDirectory(directoryRenameTask.getContext(), hdfsEnvironment, directoryRenameTask.getRenameFrom(), directoryRenameTask.getRenameTo(), () -> {});
}
}
catch (Throwable throwable) {
logCleanupFailure(throwable, "failed to undo rename of partition directory: %s to %s", directoryRenameTask.getRenameFrom(), directoryRenameTask.getRenameTo());
}
}
}
private void deleteEmptyStagingDirectories(List declaredIntentionsToWrite)
{
for (DeclaredIntentionToWrite declaredIntentionToWrite : declaredIntentionsToWrite) {
if (declaredIntentionToWrite.getMode() != WriteMode.STAGE_AND_MOVE_TO_TARGET_DIRECTORY) {
continue;
}
Path path = declaredIntentionToWrite.getStagingPathRoot();
recursiveDeleteFilesAndLog(declaredIntentionToWrite.getContext(), path, ImmutableList.of(), true, "staging directory cleanup");
}
}
private void waitForAsyncRenamesSuppressThrowables()
{
for (ListenableFuture future : fileRenameFutures) {
try {
future.get();
}
catch (InterruptedException e) {
Thread.currentThread().interrupt();
}
catch (Throwable t) {
// ignore
}
}
}
private void cancelUnstartedAsyncRenames()
{
fileRenameCancelled.set(true);
}
private void executeAddTableOperations()
{
for (CreateTableOperation addTableOperation : addTableOperations) {
addTableOperation.run(delegate);
}
}
private void executeAlterPartitionOperations()
{
for (AlterPartitionOperation alterPartitionOperation : alterPartitionOperations) {
alterPartitionOperation.run(delegate);
}
}
private void executeAddPartitionOperations()
{
for (PartitionAdder partitionAdder : partitionAdders.values()) {
partitionAdder.execute();
}
}
private void executeUpdateStatisticsOperations()
{
for (UpdateStatisticsOperation operation : updateStatisticsOperations) {
operation.run(delegate);
}
}
private void undoAddPartitionOperations()
{
for (PartitionAdder partitionAdder : partitionAdders.values()) {
List> partitionsFailedToRollback = partitionAdder.rollback();
if (!partitionsFailedToRollback.isEmpty()) {
logCleanupFailure("Failed to rollback: add_partition for partitions %s.%s %s",
partitionAdder.getSchemaName(),
partitionAdder.getTableName(),
partitionsFailedToRollback.stream());
}
}
}
private void undoAddTableOperations()
{
for (CreateTableOperation addTableOperation : addTableOperations) {
try {
addTableOperation.undo(delegate);
}
catch (Throwable throwable) {
logCleanupFailure(throwable, "failed to rollback: %s", addTableOperation.getDescription());
}
}
}
private void undoAlterPartitionOperations()
{
for (AlterPartitionOperation alterPartitionOperation : alterPartitionOperations) {
try {
alterPartitionOperation.undo(delegate);
}
catch (Throwable throwable) {
logCleanupFailure(throwable, "failed to rollback: %s", alterPartitionOperation.getDescription());
}
}
}
private void undoUpdateStatisticsOperations()
{
for (UpdateStatisticsOperation operation : updateStatisticsOperations) {
try {
operation.undo(delegate);
}
catch (Throwable throwable) {
logCleanupFailure(throwable, "failed to rollback: %s", operation.getDescription());
}
}
}
private void executeMetastoreDeleteOperations()
{
List failedDeletionDescriptions = new ArrayList<>();
List suppressedExceptions = new ArrayList<>();
boolean anySucceeded = false;
for (IrreversibleMetastoreOperation deleteOperation : metastoreDeleteOperations) {
try {
deleteOperation.run();
anySucceeded = true;
}
catch (Throwable t) {
if (metastoreDeleteOperations.size() == 1 && t instanceof TableNotFoundException) {
throw new PrestoException(HIVE_TABLE_DROPPED_DURING_QUERY,
"The metastore delete operation failed: " + deleteOperation.getDescription());
}
failedDeletionDescriptions.add(deleteOperation.getDescription());
// A limit is needed to avoid having a huge exception object. 5 was chosen arbitrarily.
if (suppressedExceptions.size() < 5) {
suppressedExceptions.add(t);
}
}
}
if (!suppressedExceptions.isEmpty()) {
StringBuilder message = new StringBuilder();
if (deleteOnly && !anySucceeded) {
message.append("The following metastore delete operations failed: ");
}
else {
message.append("The transaction didn't commit cleanly. All operations other than the following delete operations were completed: ");
}
Joiner.on("; ").appendTo(message, failedDeletionDescriptions);
PrestoException prestoException = new PrestoException(HIVE_METASTORE_ERROR, message.toString());
suppressedExceptions.forEach(prestoException::addSuppressed);
throw prestoException;
}
}
private List extractFilePrefixes(List declaredIntentionsToWrite)
{
Set filePrefixSet = new HashSet<>();
for (DeclaredIntentionToWrite declaredIntentionToWrite : declaredIntentionsToWrite) {
filePrefixSet.add(declaredIntentionToWrite.getFilePrefix());
}
return ImmutableList.copyOf(filePrefixSet);
}
}
@GuardedBy("this")
private void rollbackShared()
{
checkHoldsLock();
deleteTemporaryTableDirectories(declaredIntentionsToWrite, hdfsEnvironment);
deleteTempPathRootDirectory(declaredIntentionsToWrite, hdfsEnvironment);
for (DeclaredIntentionToWrite declaredIntentionToWrite : declaredIntentionsToWrite) {
switch (declaredIntentionToWrite.getMode()) {
case STAGE_AND_MOVE_TO_TARGET_DIRECTORY:
case DIRECT_TO_TARGET_NEW_DIRECTORY: {
if (skipTargetCleanupOnRollback && declaredIntentionToWrite.getMode() == DIRECT_TO_TARGET_NEW_DIRECTORY) {
break;
}
// Note: For STAGE_AND_MOVE_TO_TARGET_DIRECTORY there is no need to cleanup the target directory as it will only be written
// to during the commit call and the commit call cleans up after failures.
Path rootPath = declaredIntentionToWrite.getStagingPathRoot();
// In the case of DIRECT_TO_TARGET_NEW_DIRECTORY, if the directory is not guaranteed to be unique
// for the query, it is possible that another query or compute engine may see the directory, wrote
// data to it, and exported it through metastore. Therefore it may be argued that cleanup of staging
// directories must be carried out conservatively. To be safe, we only delete files that start with
// the unique prefix for queries in this transaction.
recursiveDeleteFilesAndLog(
declaredIntentionToWrite.getContext(),
rootPath,
ImmutableList.of(declaredIntentionToWrite.getFilePrefix()),
true,
format("staging/target_new directory rollback for table %s", declaredIntentionToWrite.getSchemaTableName()));
break;
}
case DIRECT_TO_TARGET_EXISTING_DIRECTORY: {
Set pathsToClean = new HashSet<>();
// Check the base directory of the declared intention
// * existing partition may also be in this directory
// * this is where new partitions are created
Path baseDirectory = declaredIntentionToWrite.getStagingPathRoot();
pathsToClean.add(baseDirectory);
SchemaTableName schemaTableName = declaredIntentionToWrite.getSchemaTableName();
Optional
table = delegate.getTable(schemaTableName.getSchemaName(), schemaTableName.getTableName());
if (table.isPresent()) {
// check every existing partition that is outside for the base directory
if (!table.get().getPartitionColumns().isEmpty()) {
List partitionNames = delegate.getPartitionNames(schemaTableName.getSchemaName(), schemaTableName.getTableName())
.orElse(ImmutableList.of());
for (List partitionNameBatch : Iterables.partition(partitionNames, 10)) {
Collection> partitions = delegate.getPartitionsByNames(schemaTableName.getSchemaName(), schemaTableName.getTableName(), partitionNameBatch).values();
partitions.stream()
.filter(Optional::isPresent)
.map(Optional::get)
.map(partition -> partition.getStorage().getLocation())
.map(Path::new)
.filter(path -> !isSameOrParent(baseDirectory, path))
.forEach(pathsToClean::add);
}
}
}
else {
logCleanupFailure(
"Error rolling back write to table %s.%s. Data directory may contain temporary data. Table was dropped in another transaction.",
schemaTableName.getSchemaName(),
schemaTableName.getTableName());
}
// delete any file that starts with the unique prefix of this query
for (Path path : pathsToClean) {
// TODO: It is a known deficiency that some empty directory does not get cleaned up in S3.
// We can not delete any of the directories here since we do not know who created them.
recursiveDeleteFilesAndLog(
declaredIntentionToWrite.getContext(),
path,
ImmutableList.of(declaredIntentionToWrite.getFilePrefix()),
false,
format("target_existing directory rollback for table %s", schemaTableName));
}
break;
}
default:
throw new UnsupportedOperationException("Unknown write mode");
}
}
}
private static void deleteTemporaryTableDirectories(List declaredIntentionsToWrite, HdfsEnvironment hdfsEnvironment)
{
for (DeclaredIntentionToWrite declaredIntentionToWrite : declaredIntentionsToWrite) {
if (declaredIntentionToWrite.isTemporaryTable()) {
deleteRecursivelyIfExists(declaredIntentionToWrite.getContext(), hdfsEnvironment, declaredIntentionToWrite.getStagingPathRoot());
}
}
}
private static void deleteTempPathRootDirectory(List declaredIntentionsToWrite, HdfsEnvironment hdfsEnvironment)
{
for (DeclaredIntentionToWrite declaredIntentionToWrite : declaredIntentionsToWrite) {
if (declaredIntentionToWrite.getTempPathRoot().isPresent()) {
deleteRecursivelyIfExists(declaredIntentionToWrite.getContext(), hdfsEnvironment, declaredIntentionToWrite.getTempPathRoot().get());
}
}
}
@VisibleForTesting
public synchronized void testOnlyCheckIsReadOnly()
{
if (state != State.EMPTY) {
throw new AssertionError("Test did not commit or rollback");
}
}
@VisibleForTesting
public void testOnlyThrowOnCleanupFailures()
{
throwOnCleanupFailure = true;
}
@GuardedBy("this")
private void checkReadable()
{
checkHoldsLock();
switch (state) {
case EMPTY:
case SHARED_OPERATION_BUFFERED:
return;
case EXCLUSIVE_OPERATION_BUFFERED:
throw new PrestoException(NOT_SUPPORTED, "Unsupported combination of operations in a single transaction");
case FINISHED:
throw new IllegalStateException("Tried to access metastore after transaction has been committed/aborted");
}
}
@GuardedBy("this")
private void setShared()
{
checkHoldsLock();
checkReadable();
state = State.SHARED_OPERATION_BUFFERED;
}
@GuardedBy("this")
private void setExclusive(ExclusiveOperation exclusiveOperation)
{
checkHoldsLock();
if (state != State.EMPTY) {
throw new PrestoException(StandardErrorCode.NOT_SUPPORTED, "Unsupported combination of operations in a single transaction");
}
state = State.EXCLUSIVE_OPERATION_BUFFERED;
bufferedExclusiveOperation = exclusiveOperation;
}
@GuardedBy("this")
private void checkNoPartitionAction(String databaseName, String tableName)
{
checkHoldsLock();
Map, Action> partitionActionsOfTable = partitionActions.get(new SchemaTableName(databaseName, tableName));
if (partitionActionsOfTable != null && !partitionActionsOfTable.isEmpty()) {
throw new PrestoException(NOT_SUPPORTED, "Cannot make schema changes to a table/view with modified partitions in the same transaction");
}
}
private static boolean isSameOrParent(Path parent, Path child)
{
int parentDepth = parent.depth();
int childDepth = child.depth();
if (parentDepth > childDepth) {
return false;
}
for (int i = childDepth; i > parentDepth; i--) {
child = child.getParent();
}
return parent.equals(child);
}
private void logCleanupFailure(String format, Object... args)
{
if (throwOnCleanupFailure) {
throw new RuntimeException(format(format, args));
}
log.warn(format, args);
}
private void logCleanupFailure(Throwable t, String format, Object... args)
{
if (throwOnCleanupFailure) {
throw new RuntimeException(format(format, args), t);
}
log.warn(t, format, args);
}
private static void asyncRename(
HdfsEnvironment hdfsEnvironment,
ListeningExecutorService executor,
AtomicBoolean cancelled,
List> fileRenameFutures,
HdfsContext context,
Path currentPath,
Path targetPath,
List fileNames)
{
FileSystem fileSystem = getFileSystem(hdfsEnvironment, context, currentPath);
for (String fileName : fileNames) {
Path source = new Path(currentPath, fileName);
Path target = new Path(targetPath, fileName);
fileRenameFutures.add(executor.submit(() -> {
if (cancelled.get()) {
return;
}
renameFile(fileSystem, source, target);
}));
}
}
private void recursiveDeleteFilesAndLog(HdfsContext context, Path directory, List filePrefixes, boolean deleteEmptyDirectories, String reason)
{
RecursiveDeleteResult recursiveDeleteResult = recursiveDeleteFiles(
hdfsEnvironment,
context,
directory,
filePrefixes,
deleteEmptyDirectories);
if (!recursiveDeleteResult.getNotDeletedEligibleItems().isEmpty()) {
logCleanupFailure(
"Error deleting directory %s for %s. Some eligible items can not be deleted: %s.",
directory.toString(),
reason,
recursiveDeleteResult.getNotDeletedEligibleItems());
}
else if (deleteEmptyDirectories && !recursiveDeleteResult.isDirectoryNoLongerExists()) {
logCleanupFailure(
"Error deleting directory %s for %s. Can not delete the directory.",
directory.toString(),
reason);
}
}
/**
* Attempt to recursively remove eligible files and/or directories in {@code directory}.
*
* When {@code filePrefixes} is not present, all files (but not necessarily directories) will be
* ineligible. If all files shall be deleted, you can use an empty string as {@code filePrefixes}.
*
* When {@code deleteEmptySubDirectory} is true, any empty directory (including directories that
* were originally empty, and directories that become empty after files prefixed with
* {@code filePrefixes} are deleted) will be eligible.
*
* This method will not delete anything that's neither a directory nor a file.
*
* @param filePrefixes prefix of files that should be deleted
* @param deleteEmptyDirectories whether empty directories should be deleted
*/
private static RecursiveDeleteResult recursiveDeleteFiles(HdfsEnvironment hdfsEnvironment, HdfsContext context, Path directory, List filePrefixes, boolean deleteEmptyDirectories)
{
FileSystem fileSystem;
try {
fileSystem = hdfsEnvironment.getFileSystem(context, directory);
if (!fileSystem.exists(directory)) {
return new RecursiveDeleteResult(true, ImmutableList.of());
}
}
catch (IOException e) {
ImmutableList.Builder notDeletedItems = ImmutableList.builder();
notDeletedItems.add(directory.toString() + "/**");
return new RecursiveDeleteResult(false, notDeletedItems.build());
}
return doRecursiveDeleteFiles(fileSystem, directory, filePrefixes, deleteEmptyDirectories);
}
private static RecursiveDeleteResult doRecursiveDeleteFiles(FileSystem fileSystem, Path directory, List filePrefixes, boolean deleteEmptyDirectories)
{
// don't delete hidden presto directories
if (directory.getName().startsWith(".presto")) {
return new RecursiveDeleteResult(false, ImmutableList.of());
}
FileStatus[] allFiles;
try {
allFiles = fileSystem.listStatus(directory);
}
catch (IOException e) {
ImmutableList.Builder notDeletedItems = ImmutableList.builder();
notDeletedItems.add(directory.toString() + "/**");
return new RecursiveDeleteResult(false, notDeletedItems.build());
}
boolean allDescendentsDeleted = true;
ImmutableList.Builder notDeletedEligibleItems = ImmutableList.builder();
for (FileStatus fileStatus : allFiles) {
if (fileStatus.isFile()) {
Path filePath = fileStatus.getPath();
String fileName = filePath.getName();
boolean eligible = false;
// never delete presto dot files
if (!fileName.startsWith(".presto")) {
// file name that starts with ".tmp.presto" is staging file, see HiveWriterFactory#createWriter.
eligible = filePrefixes.stream().anyMatch(prefix ->
fileName.startsWith(prefix) || fileName.startsWith(".tmp.presto." + prefix));
}
if (eligible) {
if (!deleteIfExists(fileSystem, filePath, false)) {
allDescendentsDeleted = false;
notDeletedEligibleItems.add(filePath.toString());
}
}
else {
allDescendentsDeleted = false;
}
}
else if (fileStatus.isDirectory()) {
RecursiveDeleteResult subResult = doRecursiveDeleteFiles(fileSystem, fileStatus.getPath(), filePrefixes, deleteEmptyDirectories);
if (!subResult.isDirectoryNoLongerExists()) {
allDescendentsDeleted = false;
}
if (!subResult.getNotDeletedEligibleItems().isEmpty()) {
notDeletedEligibleItems.addAll(subResult.getNotDeletedEligibleItems());
}
}
else {
allDescendentsDeleted = false;
notDeletedEligibleItems.add(fileStatus.getPath().toString());
}
}
if (allDescendentsDeleted && deleteEmptyDirectories) {
verify(notDeletedEligibleItems.build().isEmpty());
if (!deleteIfExists(fileSystem, directory, false)) {
return new RecursiveDeleteResult(false, ImmutableList.of(directory.toString() + "/"));
}
return new RecursiveDeleteResult(true, ImmutableList.of());
}
return new RecursiveDeleteResult(false, notDeletedEligibleItems.build());
}
/**
* Attempts to remove the file or empty directory.
*
* @return true if the location no longer exists
*/
private static boolean deleteIfExists(FileSystem fileSystem, Path path, boolean recursive)
{
try {
// attempt to delete the path
if (fileSystem.delete(path, recursive)) {
return true;
}
// delete failed
// check if path still exists
return !fileSystem.exists(path);
}
catch (FileNotFoundException ignored) {
// path was already removed or never existed
return true;
}
catch (IOException ignored) {
}
return false;
}
/**
* Attempts to remove the file or empty directory.
*
* @return true if the location no longer exists
*/
private static boolean deleteRecursivelyIfExists(HdfsContext context, HdfsEnvironment hdfsEnvironment, Path path)
{
FileSystem fileSystem;
try {
fileSystem = hdfsEnvironment.getFileSystem(context, path);
}
catch (IOException ignored) {
return false;
}
return deleteIfExists(fileSystem, path, true);
}
private static void renameDirectory(HdfsContext context, HdfsEnvironment hdfsEnvironment, Path source, Path target, Runnable runWhenPathDoesntExist)
{
if (pathExists(context, hdfsEnvironment, target)) {
throw new PrestoException(HIVE_PATH_ALREADY_EXISTS,
format("Unable to rename from %s to %s: target directory already exists", source, target));
}
if (!pathExists(context, hdfsEnvironment, target.getParent())) {
createDirectory(context, hdfsEnvironment, target.getParent());
}
// The runnable will assume that if rename fails, it will be okay to delete the directory (if the directory is empty).
// This is not technically true because a race condition still exists.
runWhenPathDoesntExist.run();
try {
if (!hdfsEnvironment.getFileSystem(context, source).rename(source, target)) {
throw new PrestoException(HIVE_FILESYSTEM_ERROR, format("Failed to rename %s to %s: rename returned false", source, target));
}
}
catch (IOException e) {
throw new PrestoException(HIVE_FILESYSTEM_ERROR, format("Failed to rename %s to %s", source, target), e);
}
}
private static Optional getPrestoQueryId(Table table)
{
return Optional.ofNullable(table.getParameters().get(PRESTO_QUERY_ID_NAME));
}
private static Optional getPrestoQueryId(Partition partition)
{
return Optional.ofNullable(partition.getParameters().get(PRESTO_QUERY_ID_NAME));
}
private void checkHoldsLock()
{
// This method serves a similar purpose at runtime as GuardedBy on method serves during static analysis.
// This method should not have significant performance impact. If it does, it may be reasonably to remove this method.
// This intentionally does not use checkState.
if (!Thread.holdsLock(this)) {
throw new IllegalStateException(format("Thread must hold a lock on the %s", getClass().getSimpleName()));
}
}
private enum State
{
EMPTY,
SHARED_OPERATION_BUFFERED,
EXCLUSIVE_OPERATION_BUFFERED,
FINISHED,
}
private enum ActionType
{
DROP,
ADD,
ALTER,
INSERT_EXISTING
}
private enum TableSource
{
CREATED_IN_THIS_TRANSACTION,
PRE_EXISTING_TABLE,
// RECREATED_IN_THIS_TRANSACTION is a possible case, but it is not supported with the current implementation
}
public static class Action
{
private final ActionType type;
private final T data;
private final HdfsContext context;
public Action(ActionType type, T data, HdfsContext context)
{
this.type = requireNonNull(type, "type is null");
if (type == ActionType.DROP) {
checkArgument(data == null, "data is not null");
}
else {
requireNonNull(data, "data is null");
}
this.data = data;
this.context = requireNonNull(context, "context is null");
}
public ActionType getType()
{
return type;
}
public T getData()
{
checkState(type != ActionType.DROP);
return data;
}
public HdfsContext getContext()
{
return context;
}
@Override
public String toString()
{
return toStringHelper(this)
.add("type", type)
.add("data", data)
.toString();
}
}
private static class TableAndMore
{
private final Table table;
private final Optional principalPrivileges;
private final Optional currentLocation; // unpartitioned table only
private final Optional> fileNames;
private final boolean ignoreExisting;
private final PartitionStatistics statistics;
private final PartitionStatistics statisticsUpdate;
public TableAndMore(
Table table,
Optional principalPrivileges,
Optional currentLocation,
Optional> fileNames,
boolean ignoreExisting,
PartitionStatistics statistics,
PartitionStatistics statisticsUpdate)
{
this.table = requireNonNull(table, "table is null");
this.principalPrivileges = requireNonNull(principalPrivileges, "principalPrivileges is null");
this.currentLocation = requireNonNull(currentLocation, "currentLocation is null");
this.fileNames = requireNonNull(fileNames, "fileNames is null");
this.ignoreExisting = ignoreExisting;
this.statistics = requireNonNull(statistics, "statistics is null");
this.statisticsUpdate = requireNonNull(statisticsUpdate, "statisticsUpdate is null");
checkArgument(!table.getTableType().equals(VIRTUAL_VIEW) || !currentLocation.isPresent(), "currentLocation can not be supplied for view");
checkArgument(!fileNames.isPresent() || currentLocation.isPresent(), "fileNames can be supplied only when currentLocation is supplied");
}
public boolean isIgnoreExisting()
{
return ignoreExisting;
}
public Table getTable()
{
return table;
}
public PrincipalPrivileges getPrincipalPrivileges()
{
checkState(principalPrivileges.isPresent());
return principalPrivileges.get();
}
public Optional getCurrentLocation()
{
return currentLocation;
}
public Optional> getFileNames()
{
return fileNames;
}
public PartitionStatistics getStatistics()
{
return statistics;
}
public PartitionStatistics getStatisticsUpdate()
{
return statisticsUpdate;
}
public Table getAugmentedTableForInTransactionRead()
{
// Don't augment the location for partitioned tables,
// as data is never read directly from the partitioned table location
if (!table.getPartitionColumns().isEmpty()) {
return table;
}
// view don't have currentLocation
if (!currentLocation.isPresent()) {
return table;
}
// For unpartitioned table, this method augments the location field of the table
// to the staging location.
// This way, if the table is accessed in an ongoing transaction, staged data
// can be found and accessed.
String currentLocation = this.currentLocation.get().toString();
if (!currentLocation.equals(table.getStorage().getLocation())) {
return Table.builder(table)
.withStorage(storage -> storage.setLocation(currentLocation))
.build();
}
return table;
}
@Override
public String toString()
{
return toStringHelper(this)
.add("table", table)
.add("principalPrivileges", principalPrivileges)
.add("currentLocation", currentLocation)
.add("fileNames", fileNames)
.add("ignoreExisting", ignoreExisting)
.add("statistics", statistics)
.add("statisticsUpdate", statisticsUpdate)
.toString();
}
}
private static class PartitionAndMore
{
private final Partition partition;
private final Path currentLocation;
private final Optional> fileNames;
private final PartitionStatistics statistics;
private final PartitionStatistics statisticsUpdate;
public PartitionAndMore(Partition partition, Path currentLocation, Optional> fileNames, PartitionStatistics statistics, PartitionStatistics statisticsUpdate)
{
this.partition = requireNonNull(partition, "partition is null");
this.currentLocation = requireNonNull(currentLocation, "currentLocation is null");
this.fileNames = requireNonNull(fileNames, "fileNames is null");
this.statistics = requireNonNull(statistics, "statistics is null");
this.statisticsUpdate = requireNonNull(statisticsUpdate, "statisticsUpdate is null");
}
public Partition getPartition()
{
return partition;
}
public Path getCurrentLocation()
{
return currentLocation;
}
public List getFileNames()
{
checkState(fileNames.isPresent());
return fileNames.get();
}
public PartitionStatistics getStatistics()
{
return statistics;
}
public PartitionStatistics getStatisticsUpdate()
{
return statisticsUpdate;
}
public Partition getAugmentedPartitionForInTransactionRead()
{
// This method augments the location field of the partition to the staging location.
// This way, if the partition is accessed in an ongoing transaction, staged data
// can be found and accessed.
String currentLocation = this.currentLocation.toString();
if (!currentLocation.equals(partition.getStorage().getLocation())) {
return Partition.builder(partition)
.withStorage(storage -> storage.setLocation(currentLocation))
.build();
}
return partition;
}
@Override
public String toString()
{
return toStringHelper(this)
.add("partition", partition)
.add("currentLocation", currentLocation)
.add("fileNames", fileNames)
.toString();
}
}
private static class DeclaredIntentionToWrite
{
private final WriteMode mode;
private final HdfsContext context;
private final String filePrefix;
private final Path stagingPathRoot;
private final Optional tempPathRoot;
private final SchemaTableName schemaTableName;
private final boolean temporaryTable;
public DeclaredIntentionToWrite(
WriteMode mode,
HdfsContext context,
Path stagingPathRoot,
Optional tempPathRoot,
String filePrefix,
SchemaTableName schemaTableName,
boolean temporaryTable)
{
this.mode = requireNonNull(mode, "mode is null");
this.context = requireNonNull(context, "context is null");
this.stagingPathRoot = requireNonNull(stagingPathRoot, "stagingPathRoot is null");
this.tempPathRoot = requireNonNull(tempPathRoot, "tempPathRoot is null");
this.filePrefix = requireNonNull(filePrefix, "filePrefix is null");
this.schemaTableName = requireNonNull(schemaTableName, "schemaTableName is null");
this.temporaryTable = temporaryTable;
}
public WriteMode getMode()
{
return mode;
}
public HdfsContext getContext()
{
return context;
}
public String getFilePrefix()
{
return filePrefix;
}
public Path getStagingPathRoot()
{
return stagingPathRoot;
}
public Optional getTempPathRoot()
{
return tempPathRoot;
}
public SchemaTableName getSchemaTableName()
{
return schemaTableName;
}
public boolean isTemporaryTable()
{
return temporaryTable;
}
@Override
public String toString()
{
return toStringHelper(this)
.add("mode", mode)
.add("context", context)
.add("filePrefix", filePrefix)
.add("stagingPathRoot", stagingPathRoot)
.add("tempPathRoot", tempPathRoot)
.add("schemaTableName", schemaTableName)
.add("temporaryTable", temporaryTable)
.toString();
}
}
private static class DirectoryCleanUpTask
{
private final HdfsContext context;
private final Path path;
private final boolean deleteEmptyDirectory;
public DirectoryCleanUpTask(HdfsContext context, Path path, boolean deleteEmptyDirectory)
{
this.context = context;
this.path = path;
this.deleteEmptyDirectory = deleteEmptyDirectory;
}
public HdfsContext getContext()
{
return context;
}
public Path getPath()
{
return path;
}
public boolean isDeleteEmptyDirectory()
{
return deleteEmptyDirectory;
}
@Override
public String toString()
{
return toStringHelper(this)
.add("context", context)
.add("path", path)
.add("deleteEmptyDirectory", deleteEmptyDirectory)
.toString();
}
}
private static class DirectoryDeletionTask
{
private final HdfsContext context;
private final Path path;
public DirectoryDeletionTask(HdfsContext context, Path path)
{
this.context = context;
this.path = path;
}
public HdfsContext getContext()
{
return context;
}
public Path getPath()
{
return path;
}
@Override
public String toString()
{
return toStringHelper(this)
.add("context", context)
.add("path", path)
.toString();
}
}
private static class DirectoryRenameTask
{
private final HdfsContext context;
private final Path renameFrom;
private final Path renameTo;
public DirectoryRenameTask(HdfsContext context, Path renameFrom, Path renameTo)
{
this.context = requireNonNull(context, "context is null");
this.renameFrom = requireNonNull(renameFrom, "renameFrom is null");
this.renameTo = requireNonNull(renameTo, "renameTo is null");
}
public HdfsContext getContext()
{
return context;
}
public Path getRenameFrom()
{
return renameFrom;
}
public Path getRenameTo()
{
return renameTo;
}
@Override
public String toString()
{
return toStringHelper(this)
.add("context", context)
.add("renameFrom", renameFrom)
.add("renameTo", renameTo)
.toString();
}
}
private static class IrreversibleMetastoreOperation
{
private final String description;
private final Runnable action;
public IrreversibleMetastoreOperation(String description, Runnable action)
{
this.description = requireNonNull(description, "description is null");
this.action = requireNonNull(action, "action is null");
}
public String getDescription()
{
return description;
}
public void run()
{
action.run();
}
}
private static class CreateTableOperation
{
private final Table newTable;
private final PrincipalPrivileges privileges;
private boolean tableCreated;
private final boolean ignoreExisting;
private final String queryId;
public CreateTableOperation(Table newTable, PrincipalPrivileges privileges, boolean ignoreExisting)
{
requireNonNull(newTable, "newTable is null");
this.newTable = newTable;
this.privileges = requireNonNull(privileges, "privileges is null");
this.ignoreExisting = ignoreExisting;
this.queryId = getPrestoQueryId(newTable).orElseThrow(() -> new IllegalArgumentException("Query id is not present"));
}
public String getDescription()
{
return format("add table %s.%s", newTable.getDatabaseName(), newTable.getTableName());
}
public void run(ExtendedHiveMetastore metastore)
{
boolean done = false;
try {
metastore.createTable(newTable, privileges);
done = true;
}
catch (RuntimeException e) {
try {
Optional
existingTable = metastore.getTable(newTable.getDatabaseName(), newTable.getTableName());
if (existingTable.isPresent()) {
Table table = existingTable.get();
Optional existingTableQueryId = getPrestoQueryId(table);
if (existingTableQueryId.isPresent() && existingTableQueryId.get().equals(queryId)) {
// ignore table if it was already created by the same query during retries
done = true;
}
else {
// If the table definition in the metastore is different than what this tx wants to create
// then there is a conflict (e.g., current tx wants to create T(a: bigint),
// but another tx already created T(a: varchar)).
// This may be a problem if there is an insert after this step.
if (!hasTheSameSchema(newTable, table)) {
e = new PrestoException(TRANSACTION_CONFLICT, format("Table already exists with a different schema: '%s'", newTable.getTableName()));
}
else {
done = ignoreExisting;
}
}
}
}
catch (RuntimeException ignored) {
// When table could not be fetched from metastore, it is not known whether the table was added.
// Deleting the table when aborting commit has the risk of deleting table not added in this transaction.
// Not deleting the table may leave garbage behind. The former is much more dangerous than the latter.
// Therefore, the table is not considered added.
}
if (!done) {
throw e;
}
}
tableCreated = true;
}
private boolean hasTheSameSchema(Table newTable, Table existingTable)
{
List newTableColumns = newTable.getDataColumns();
List existingTableColumns = existingTable.getDataColumns();
if (newTableColumns.size() != existingTableColumns.size()) {
return false;
}
for (Column existingColumn : existingTableColumns) {
if (newTableColumns.stream()
.noneMatch(newColumn -> newColumn.getName().equals(existingColumn.getName())
&& newColumn.getType().equals(existingColumn.getType()))) {
return false;
}
}
return true;
}
public void undo(ExtendedHiveMetastore metastore)
{
if (!tableCreated) {
return;
}
metastore.dropTable(newTable.getDatabaseName(), newTable.getTableName(), false);
}
}
private static class AlterPartitionOperation
{
private final PartitionWithStatistics newPartition;
private final PartitionWithStatistics oldPartition;
private boolean undo;
public AlterPartitionOperation(PartitionWithStatistics newPartition, PartitionWithStatistics oldPartition)
{
this.newPartition = requireNonNull(newPartition, "newPartition is null");
this.oldPartition = requireNonNull(oldPartition, "oldPartition is null");
checkArgument(newPartition.getPartition().getDatabaseName().equals(oldPartition.getPartition().getDatabaseName()));
checkArgument(newPartition.getPartition().getTableName().equals(oldPartition.getPartition().getTableName()));
checkArgument(newPartition.getPartition().getValues().equals(oldPartition.getPartition().getValues()));
}
public String getDescription()
{
return format(
"alter partition %s.%s %s",
newPartition.getPartition().getDatabaseName(),
newPartition.getPartition().getTableName(),
newPartition.getPartition().getValues());
}
public void run(ExtendedHiveMetastore metastore)
{
undo = true;
metastore.alterPartition(newPartition.getPartition().getDatabaseName(), newPartition.getPartition().getTableName(), newPartition);
}
public void undo(ExtendedHiveMetastore metastore)
{
if (!undo) {
return;
}
metastore.alterPartition(oldPartition.getPartition().getDatabaseName(), oldPartition.getPartition().getTableName(), oldPartition);
}
}
private static class UpdateStatisticsOperation
{
private final SchemaTableName tableName;
private final Optional partitionName;
private final PartitionStatistics statistics;
private final boolean merge;
private boolean done;
public UpdateStatisticsOperation(SchemaTableName tableName, Optional partitionName, PartitionStatistics statistics, boolean merge)
{
this.tableName = requireNonNull(tableName, "tableName is null");
this.partitionName = requireNonNull(partitionName, "partitionValues is null");
this.statistics = requireNonNull(statistics, "statistics is null");
this.merge = merge;
}
public void run(ExtendedHiveMetastore metastore)
{
if (partitionName.isPresent()) {
metastore.updatePartitionStatistics(tableName.getSchemaName(), tableName.getTableName(), partitionName.get(), this::updateStatistics);
}
else {
metastore.updateTableStatistics(tableName.getSchemaName(), tableName.getTableName(), this::updateStatistics);
}
done = true;
}
public void undo(ExtendedHiveMetastore metastore)
{
if (!done) {
return;
}
if (partitionName.isPresent()) {
metastore.updatePartitionStatistics(tableName.getSchemaName(), tableName.getTableName(), partitionName.get(), this::resetStatistics);
}
else {
metastore.updateTableStatistics(tableName.getSchemaName(), tableName.getTableName(), this::resetStatistics);
}
}
public String getDescription()
{
if (partitionName.isPresent()) {
return format("replace partition parameters %s %s", tableName, partitionName.get());
}
return format("replace table parameters %s", tableName);
}
private PartitionStatistics updateStatistics(PartitionStatistics currentStatistics)
{
return merge ? merge(currentStatistics, statistics) : statistics;
}
private PartitionStatistics resetStatistics(PartitionStatistics currentStatistics)
{
return new PartitionStatistics(reduce(currentStatistics.getBasicStatistics(), statistics.getBasicStatistics(), SUBTRACT), ImmutableMap.of());
}
}
private static class PartitionAdder
{
private final String schemaName;
private final String tableName;
private final ExtendedHiveMetastore metastore;
private final int batchSize;
private final List partitions;
private List> createdPartitionValues = new ArrayList<>();
public PartitionAdder(String schemaName, String tableName, ExtendedHiveMetastore metastore, int batchSize)
{
this.schemaName = schemaName;
this.tableName = tableName;
this.metastore = metastore;
this.batchSize = batchSize;
this.partitions = new ArrayList<>(batchSize);
}
public String getSchemaName()
{
return schemaName;
}
public String getTableName()
{
return tableName;
}
public void addPartition(PartitionWithStatistics partition)
{
checkArgument(getPrestoQueryId(partition.getPartition()).isPresent());
partitions.add(partition);
}
public void execute()
{
List> batchedPartitions = Lists.partition(partitions, batchSize);
for (List batch : batchedPartitions) {
try {
metastore.addPartitions(schemaName, tableName, batch);
for (PartitionWithStatistics partition : batch) {
createdPartitionValues.add(partition.getPartition().getValues());
}
}
catch (Throwable t) {
// Add partition to the created list conservatively.
// Some metastore implementations are known to violate the "all or none" guarantee for add_partitions call.
boolean batchCompletelyAdded = true;
for (PartitionWithStatistics partition : batch) {
try {
Optional remotePartition = metastore.getPartition(schemaName, tableName, partition.getPartition().getValues());
// getPrestoQueryId(partition) is guaranteed to be non-empty. It is asserted in PartitionAdder.addPartition.
if (remotePartition.isPresent() && getPrestoQueryId(remotePartition.get()).equals(getPrestoQueryId(partition.getPartition()))) {
createdPartitionValues.add(partition.getPartition().getValues());
}
else {
batchCompletelyAdded = false;
}
}
catch (Throwable ignored) {
// When partition could not be fetched from metastore, it is not known whether the partition was added.
// Deleting the partition when aborting commit has the risk of deleting partition not added in this transaction.
// Not deleting the partition may leave garbage behind. The former is much more dangerous than the latter.
// Therefore, the partition is not added to the createdPartitionValues list here.
batchCompletelyAdded = false;
}
}
// If all the partitions were added successfully, the add_partition operation was actually successful.
// For some reason, it threw an exception (communication failure, retry failure after communication failure, etc).
// But we would consider it successful anyways.
if (!batchCompletelyAdded) {
if (t instanceof TableNotFoundException) {
throw new PrestoException(HIVE_TABLE_DROPPED_DURING_QUERY, t);
}
throw t;
}
}
}
partitions.clear();
}
public List> rollback()
{
// drop created partitions
List> partitionsFailedToRollback = new ArrayList<>();
for (List createdPartitionValue : createdPartitionValues) {
try {
metastore.dropPartition(schemaName, tableName, createdPartitionValue, false);
}
catch (PartitionNotFoundException e) {
// Maybe some one deleted the partition we added.
// Anyways, we are good because the partition is not there anymore.
}
catch (Throwable t) {
partitionsFailedToRollback.add(createdPartitionValue);
}
}
createdPartitionValues = partitionsFailedToRollback;
return partitionsFailedToRollback;
}
}
private static class RecursiveDeleteResult
{
private final boolean directoryNoLongerExists;
private final List notDeletedEligibleItems;
public RecursiveDeleteResult(boolean directoryNoLongerExists, List notDeletedEligibleItems)
{
this.directoryNoLongerExists = directoryNoLongerExists;
this.notDeletedEligibleItems = notDeletedEligibleItems;
}
public boolean isDirectoryNoLongerExists()
{
return directoryNoLongerExists;
}
public List getNotDeletedEligibleItems()
{
return notDeletedEligibleItems;
}
}
private interface ExclusiveOperation
{
void execute(ExtendedHiveMetastore delegate, HdfsEnvironment hdfsEnvironment);
}
}
