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feat(csharp/src/Drivers): introduce drivers for Apache systems built …
…on Thrift (apache#1710) This PR introduces new drivers built on the Thrift protocol: Hive, Impala, and Spark. The main focus has been on Spark (including Databricks) for the initial set of tests. --------- Co-authored-by: David Coe <coedavid@umich.edu> Co-authored-by: vikrantpuppala <vikrant.puppala@databricks.com> Co-authored-by: Gopal Lal <gopal.lal@databricks.com> Co-authored-by: Vikrant Puppala <vikrantpuppala@gmail.com> Co-authored-by: Gopal Lal <135012033+gopalldb@users.noreply.github.com> Co-authored-by: Jade Wang <111902719+jadewang-db@users.noreply.github.com> Co-authored-by: yunbodeng-db <104732431+yunbodeng-db@users.noreply.github.com> Co-authored-by: David Li <li.davidm96@gmail.com> Co-authored-by: Bruce Irschick <bruce.irschick@improving.com>
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csharp/src/Drivers/Apache/Apache.Arrow.Adbc.Drivers.Apache.csproj
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| <Project Sdk="Microsoft.NET.Sdk"> | ||
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| <PropertyGroup> | ||
| <TargetFrameworks>net472;net6.0</TargetFrameworks> | ||
| </PropertyGroup> | ||
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| <ItemGroup> | ||
| <PackageReference Include="ApacheThrift" Version="0.19.0" /> | ||
| </ItemGroup> | ||
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| <ItemGroup> | ||
| <ProjectReference Include="..\..\Apache.Arrow.Adbc\Apache.Arrow.Adbc.csproj" /> | ||
| </ItemGroup> | ||
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| </Project> |
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csharp/src/Drivers/Apache/Hive2/HiveServer2Connection.cs
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| /* | ||
| * Licensed to the Apache Software Foundation (ASF) under one or more | ||
| * contributor license agreements. See the NOTICE file distributed with | ||
| * this work for additional information regarding copyright ownership. | ||
| * The ASF licenses this file to You 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. | ||
| */ | ||
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| using System; | ||
| using System.Collections.Generic; | ||
| using System.Threading; | ||
| using System.Threading.Tasks; | ||
| using Apache.Arrow.Ipc; | ||
| using Apache.Hive.Service.Rpc.Thrift; | ||
| using Thrift.Protocol; | ||
| using Thrift.Transport; | ||
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| namespace Apache.Arrow.Adbc.Drivers.Apache.Hive2 | ||
| { | ||
| public abstract class HiveServer2Connection : AdbcConnection | ||
| { | ||
| const string userAgent = "AdbcExperimental/0.0"; | ||
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| protected TOperationHandle operationHandle; | ||
| protected IReadOnlyDictionary<string, string> properties; | ||
| internal TTransport transport; | ||
| internal TCLIService.Client client; | ||
| internal TSessionHandle sessionHandle; | ||
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| internal HiveServer2Connection() : this(null) | ||
| { | ||
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| } | ||
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| internal HiveServer2Connection(IReadOnlyDictionary<string, string> properties) | ||
| { | ||
| this.properties = properties; | ||
| } | ||
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| public void Open() | ||
| { | ||
| TProtocol protocol = CreateProtocol(); | ||
| this.transport = protocol.Transport; | ||
| this.client = new TCLIService.Client(protocol); | ||
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| var s0 = this.client.OpenSession(CreateSessionRequest()).Result; | ||
| this.sessionHandle = s0.SessionHandle; | ||
| } | ||
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| protected abstract TProtocol CreateProtocol(); | ||
| protected abstract TOpenSessionReq CreateSessionRequest(); | ||
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| public override IArrowArrayStream GetObjects(GetObjectsDepth depth, string catalogPattern, string dbSchemaPattern, string tableNamePattern, List<string> tableTypes, string columnNamePattern) | ||
| { | ||
| throw new NotImplementedException(); | ||
| } | ||
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| public override IArrowArrayStream GetInfo(List<int> codes) | ||
| { | ||
| throw new NotImplementedException(); | ||
| } | ||
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| public override IArrowArrayStream GetTableTypes() | ||
| { | ||
| throw new NotImplementedException(); | ||
| } | ||
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| protected void PollForResponse() | ||
| { | ||
| TGetOperationStatusResp statusResponse = null; | ||
| do | ||
| { | ||
| if (statusResponse != null) { Thread.Sleep(500); } | ||
| TGetOperationStatusReq request = new TGetOperationStatusReq(this.operationHandle); | ||
| statusResponse = this.client.GetOperationStatus(request).Result; | ||
| } while (statusResponse.OperationState == TOperationState.PENDING_STATE || statusResponse.OperationState == TOperationState.RUNNING_STATE); | ||
| } | ||
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| public override void Dispose() | ||
| { | ||
| if (this.client != null) | ||
| { | ||
| TCloseSessionReq r6 = new TCloseSessionReq(this.sessionHandle); | ||
| this.client.CloseSession(r6).Wait(); | ||
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| this.transport.Close(); | ||
| this.client.Dispose(); | ||
| this.transport = null; | ||
| this.client = null; | ||
| } | ||
| } | ||
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| protected Schema GetSchema() | ||
| { | ||
| TGetResultSetMetadataReq request = new TGetResultSetMetadataReq(this.operationHandle); | ||
| TGetResultSetMetadataResp response = this.client.GetResultSetMetadata(request).Result; | ||
| return SchemaParser.GetArrowSchema(response.Schema); | ||
| } | ||
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| sealed class GetObjectsReader : IArrowArrayStream | ||
| { | ||
| HiveServer2Connection connection; | ||
| Schema schema; | ||
| List<TSparkArrowBatch> batches; | ||
| int index; | ||
| IArrowReader reader; | ||
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| public GetObjectsReader(HiveServer2Connection connection, Schema schema) | ||
| { | ||
| this.connection = connection; | ||
| this.schema = schema; | ||
| } | ||
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| public Schema Schema { get { return schema; } } | ||
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| public async ValueTask<RecordBatch> ReadNextRecordBatchAsync(CancellationToken cancellationToken = default) | ||
| { | ||
| while (true) | ||
| { | ||
| if (this.reader != null) | ||
| { | ||
| RecordBatch next = await this.reader.ReadNextRecordBatchAsync(cancellationToken); | ||
| if (next != null) | ||
| { | ||
| return next; | ||
| } | ||
| this.reader = null; | ||
| } | ||
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| if (this.batches != null && this.index < this.batches.Count) | ||
| { | ||
| this.reader = new ArrowStreamReader(new ChunkStream(this.schema, this.batches[this.index++].Batch)); | ||
| continue; | ||
| } | ||
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| this.batches = null; | ||
| this.index = 0; | ||
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| if (this.connection == null) | ||
| { | ||
| return null; | ||
| } | ||
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| TFetchResultsReq request = new TFetchResultsReq(this.connection.operationHandle, TFetchOrientation.FETCH_NEXT, 50000); | ||
| TFetchResultsResp response = await this.connection.client.FetchResults(request, cancellationToken); | ||
| this.batches = response.Results.ArrowBatches; | ||
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| if (!response.HasMoreRows) | ||
| { | ||
| this.connection = null; | ||
| } | ||
| } | ||
| } | ||
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| public void Dispose() | ||
| { | ||
| } | ||
| } | ||
| } | ||
| } |
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| @@ -0,0 +1,69 @@ | ||
| /* | ||
| * Licensed to the Apache Software Foundation (ASF) under one or more | ||
| * contributor license agreements. See the NOTICE file distributed with | ||
| * this work for additional information regarding copyright ownership. | ||
| * The ASF licenses this file to You 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. | ||
| */ | ||
|
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| using System; | ||
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| namespace Apache.Arrow.Adbc.Drivers.Apache.Hive2 | ||
| { | ||
| public class HiveServer2Exception : AdbcException | ||
| { | ||
| private string _sqlState; | ||
| private int _nativeError; | ||
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| public HiveServer2Exception() | ||
| { | ||
| } | ||
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| public HiveServer2Exception(string message) : base(message) | ||
| { | ||
| } | ||
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| public HiveServer2Exception(string message, AdbcStatusCode statusCode) : base(message, statusCode) | ||
| { | ||
| } | ||
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| public HiveServer2Exception(string message, Exception innerException) : base(message, innerException) | ||
| { | ||
| } | ||
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| public HiveServer2Exception(string message, AdbcStatusCode statusCode, Exception innerException) : base(message, statusCode, innerException) | ||
| { | ||
| } | ||
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| public override string SqlState | ||
| { | ||
| get { return _sqlState; } | ||
| } | ||
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| public override int NativeError | ||
| { | ||
| get { return _nativeError; } | ||
| } | ||
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| internal HiveServer2Exception SetSqlState(string sqlState) | ||
| { | ||
| _sqlState = sqlState; | ||
| return this; | ||
| } | ||
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| internal HiveServer2Exception SetNativeError(int nativeError) | ||
| { | ||
| _nativeError = nativeError; | ||
| return this; | ||
| } | ||
| } | ||
| } |
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