io.trino.plugin.hive.LocationService Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of trino-hive Show documentation
Show all versions of trino-hive Show documentation
This is a Databricks build of Trino's Hive plugin which includes support for HTTP based transport
for it's Hive metastore thrift interface.
The newest version!
/*
* 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.hive;
import io.trino.plugin.hive.metastore.Partition;
import io.trino.plugin.hive.metastore.SemiTransactionalHiveMetastore;
import io.trino.plugin.hive.metastore.Table;
import io.trino.spi.connector.ConnectorSession;
import org.apache.hadoop.fs.Path;
import java.util.Optional;
import static java.util.Objects.requireNonNull;
public interface LocationService
{
Path forNewTable(SemiTransactionalHiveMetastore metastore, ConnectorSession session, String schemaName, String tableName);
LocationHandle forNewTableAsSelect(SemiTransactionalHiveMetastore metastore, ConnectorSession session, String schemaName, String tableName, Optional externalLocation);
LocationHandle forExistingTable(SemiTransactionalHiveMetastore metastore, ConnectorSession session, Table table);
LocationHandle forOptimize(SemiTransactionalHiveMetastore metastore, ConnectorSession session, Table table);
/**
* targetPath and writePath will be root directory of all partition and table paths
* that may be returned by {@link #getTableWriteInfo(LocationHandle, boolean)} and {@link #getPartitionWriteInfo(LocationHandle, Optional, String)} method.
*/
WriteInfo getQueryWriteInfo(LocationHandle locationHandle);
WriteInfo getTableWriteInfo(LocationHandle locationHandle, boolean overwrite);
/**
* If {@code partition} is present, returns {@code WriteInfo} for appending existing partition;
* otherwise, returns {@code WriteInfo} for writing new partition or overwriting existing partition.
*/
WriteInfo getPartitionWriteInfo(LocationHandle locationHandle, Optional partition, String partitionName);
class WriteInfo
{
private final Path targetPath;
private final Path writePath;
private final LocationHandle.WriteMode writeMode;
public WriteInfo(Path targetPath, Path writePath, LocationHandle.WriteMode writeMode)
{
this.targetPath = requireNonNull(targetPath, "targetPath is null");
this.writePath = requireNonNull(writePath, "writePath is null");
this.writeMode = requireNonNull(writeMode, "writeMode is null");
}
/**
* Target path for the partition, unpartitioned table, or the query.
*/
public Path getTargetPath()
{
return targetPath;
}
/**
* Temporary path for writing to the partition, unpartitioned table or the query.
*
* It may be the same as {@code targetPath}.
*/
public Path getWritePath()
{
return writePath;
}
public LocationHandle.WriteMode getWriteMode()
{
return writeMode;
}
}
}