be/src/exec/aggregation-node.h

// Licensed to the Apache Software Foundation (ASF) under one
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// to you under the Apache License, Version 2.0 (the
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//
//   http://www.apache.org/licenses/LICENSE-2.0
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#ifndef IMPALA_EXEC_AGGREGATION_NODE_H
#define IMPALA_EXEC_AGGREGATION_NODE_H

#include <memory>

#include "exec/aggregation-node-base.h"

namespace impala {

class RowBatch;
class RuntimeState;

/// Node for doing partitioned hash aggregation.
/// This node consumes the input from child(0) during Open() and then passes it to the
/// Aggregator, which does the actual work of aggregating.
class AggregationNode : public AggregationNodeBase {
 public:
  AggregationNode(ObjectPool* pool, const TPlanNode& tnode, const DescriptorTbl& descs);

  virtual Status Open(RuntimeState* state) override;
  virtual Status GetNext(RuntimeState* state, RowBatch* row_batch, bool* eos) override;
  virtual void Close(RuntimeState* state) override;

  virtual void DebugString(int indentation_level, std::stringstream* out) const override;
};
} // namespace impala

#endif // IMPALA_EXEC_AGGREGATION_NODE_H