text: // 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 DORIS_BE_SRC_QUERY_EXEC_OLAP_REWRITE_NODE_H
  #define DORIS_BE_SRC_QUERY_EXEC_OLAP_REWRITE_NODE_H
  
  #include <memory>
  
  #include "exec/exec_node.h"
  #include "runtime/mem_pool.h"
  
  namespace doris {
  
  class Tuple;
  class TupleRow;
  
  // OlapRewriteNode used to filter row that not suite for Olap Table
  class OlapRewriteNode : public ExecNode {
  public:
      OlapRewriteNode(ObjectPool* pool, const TPlanNode& tnode, const DescriptorTbl& descs);
  
      virtual Status init(const TPlanNode& tnode, RuntimeState* state = nullptr);
      virtual ~OlapRewriteNode() { }
      virtual Status prepare(RuntimeState* state);
      virtual Status open(RuntimeState* state);
      virtual Status get_next(RuntimeState* state, RowBatch* row_batch, bool* eos);
      virtual Status close(RuntimeState* state);
  
  private:
      // Copy rows from _child_row_batch for which _conjuncts evaluate to true to
      // output_batch, up to _limit.
      // Return true if limit was hit or output_batch should be returned, otherwise false.
      bool copy_rows(RuntimeState* state, RowBatch* output_batch);
      bool copy_one_row(TupleRow* src_row, Tuple* tuple, MemPool* pool, std::stringstream* ss);
  
      // current row batch of child
      std::unique_ptr<RowBatch> _child_row_batch;
  
      // index of current row in _child_row_batch
      int _child_row_idx;
  
      // true if last get_next() call on child signalled eos
      bool _child_eos;
  
      std::vector<ExprContext*> _columns;
      std::vector<TColumnType> _column_types;
  
      TupleId _output_tuple_id;
      TupleDescriptor* _output_tuple_desc;
  
      std::vector<DecimalValue> _max_decimal_val;
  };
  
  }
  
  #endif
  