| // 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. |
| |
| |
| #ifndef IMPALA_EXEC_HDFS_SCAN_NODE_MT_H_ |
| #define IMPALA_EXEC_HDFS_SCAN_NODE_MT_H_ |
| |
| #include <boost/scoped_ptr.hpp> |
| |
| #include "exec/hdfs-scanner.h" |
| #include "exec/hdfs-scan-node-base.h" |
| |
| namespace impala { |
| |
| class DescriptorTbl; |
| class ObjectPool; |
| class RuntimeState; |
| class RowBatch; |
| class ScannerContext; |
| class TPlanNode; |
| |
| /// Scan node that materializes tuples, evaluates conjuncts and runtime filters |
| /// in the thread calling GetNext(). Uses the HdfsScanner::GetNext() interface. |
| class HdfsScanNodeMt : public HdfsScanNodeBase { |
| public: |
| HdfsScanNodeMt(ObjectPool* pool, const TPlanNode& tnode, const DescriptorTbl& descs); |
| ~HdfsScanNodeMt(); |
| |
| virtual Status Prepare(RuntimeState* state) override WARN_UNUSED_RESULT; |
| virtual Status Open(RuntimeState* state) override WARN_UNUSED_RESULT; |
| virtual Status GetNext(RuntimeState* state, RowBatch* row_batch, bool* eos) |
| override WARN_UNUSED_RESULT; |
| virtual void Close(RuntimeState* state) override; |
| |
| virtual bool HasRowBatchQueue() const override { return false; } |
| virtual ExecutionModel getExecutionModel() const override { return TASK_BASED; } |
| |
| private: |
| /// Create and open new scanner for this partition type. |
| /// If the scanner is successfully created and opened, it is returned in 'scanner'. |
| Status CreateAndOpenScanner(HdfsPartitionDescriptor* partition, |
| ScannerContext* context, boost::scoped_ptr<HdfsScanner>* scanner) |
| WARN_UNUSED_RESULT; |
| |
| /// Current scan range and corresponding scanner. |
| io::ScanRange* scan_range_; |
| boost::scoped_ptr<ScannerContext> scanner_ctx_; |
| boost::scoped_ptr<HdfsScanner> scanner_; |
| }; |
| |
| } |
| |
| #endif |