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C++ BTreeNode::getRightSibling方法代码示例

本文整理汇总了C++中BTreeNode::getRightSibling方法的典型用法代码示例。如果您正苦于以下问题:C++ BTreeNode::getRightSibling方法的具体用法?C++ BTreeNode::getRightSibling怎么用?C++ BTreeNode::getRightSibling使用的例子?那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在BTreeNode的用法示例。


在下文中一共展示了BTreeNode::getRightSibling方法的1个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的C++代码示例。

示例1: if


//.........这里部分代码省略.........
        if ( ( (LeafNode *) node )->get_values()[i] <= to_find)
        {
          vector<streampos> offset = ( (LeafNode *) node )->get_values()[i].offset;
          *itr += *( index_fetch( offset ) );
        }
      }
      node = node->getLeftSibling();
    }
  }
  else if ( op == OP_LT )
  {
    BTreeNode * node = btree->find_leq( to_find );

    if ( node == NULL )
      return NULL;

    BTreeNode * cur_node = node;
    vector<string> tuples;
    myItr->open();
    tuples.push_back( myItr->first() );
    myItr->close();
    itr = new MyItr( name, tuples  );
    //cout << " at least here" << endl;
    while( node )
    {
      for ( int i = node->getCount() - 1; i >= 0; i-- )
      {
        if ( ( (LeafNode *) node )->get_values()[i] < to_find)
        {
          vector<streampos> offset = ( (LeafNode *) node )->get_values()[i].offset;
          *itr += *( index_fetch( offset ) );
        }
      }
      node = node->getLeftSibling();
    }
  }
  else if ( op == OP_GEQ )
  {
    BTreeNode * node = btree->find_geq( to_find );

    if ( node == NULL )
      return NULL;

    BTreeNode * cur_node = node;
    vector<string> tuples;
    myItr->open();
    tuples.push_back( myItr->first() );
    myItr->close();
    itr = new MyItr( name, tuples  );
    //cout << " at least here" << endl;
    while( node )
    {
      for ( int i = 0;  i < node->getCount(); i++ )
      {
        if ( ( (LeafNode *) node )->get_values()[i] >= to_find)
        {
          vector<streampos> offset = ( (LeafNode *) node )->get_values()[i].offset;
          *itr += *( index_fetch( offset ) );
        }
      }
      node = node->getRightSibling();
    }
  }
  else if ( op == OP_GT )
  {
    //cout << "GT" << endl;
    BTreeNode * node = btree->find_geq( to_find );

    if ( node == NULL )
      return NULL;
    
    BTreeNode * cur_node = node;
    vector<string> tuples;
    myItr->open();
    tuples.push_back( myItr->first() );
    myItr->close();
    itr = new MyItr( name, tuples  );
    //cout << " at least here" << endl;
    //cout << node << endl;
    while( node )
    {
      for ( int i = 0;  i < node->getCount(); i++ )
      {
        if ( ( (LeafNode *) node )->get_values()[i] > to_find)
        {
          vector<streampos> offset = ( (LeafNode *) node )->get_values()[i].offset;
          *itr += *( index_fetch( offset ) );
        }
      }
      node = node->getRightSibling();
    }
  }
  else
  {
    cerr << "Error in Table::index_find(): should never be here." << endl;
    return NULL;
  }

  return itr;
}
开发者ID:Shunxu-H,项目名称:DIY-Database,代码行数:101,代码来源:Tables.cpp


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