本文整理汇总了C++中Relation::addRow方法的典型用法代码示例。如果您正苦于以下问题：C++ Relation::addRow方法的具体用法？C++ Relation::addRow怎么用？C++ Relation::addRow使用的例子？那么恭喜您, 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类Relation的用法示例。
在下文中一共展示了Relation::addRow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: naturalJoin
//.........这里部分代码省略.........
for ( unsigned j = 0; j < attA.size( ); j++ ){
if ( attB.at( i ) == attA.at( j ) ){
found = true;
}
}
if ( !found ){
indexBOnly.push_back( i );
}
}
//Set up the result attributes
vector<Attribute> rA;
for ( unsigned i = 0; i < indexAOnly.size( ); i++ ){
rA.push_back( attA.at( indexAOnly.at( i ) ) );
}
for ( unsigned i = 0; i < jointAttributes.size( ); i++ ){
rA.push_back( jointAttributes.at( i ) );
}
for ( unsigned i = 0; i < indexBOnly.size( ); i++ ){
rA.push_back( attB.at( indexBOnly.at( i ) ) );
}
myResult.setAttributes( rA );
//Compose this as three relations side by side
vector<Relation> aOnly;
vector<Relation> bOnly;
vector<Relation> shared;
//Push values into aOnly using our indexes
for ( unsigned i = 0; i < indexAOnly.size( ); i++ ){
vector<string> att;
att.push_back( relationA->getAttributeAt( indexAOnly.at( i ) ).name );
aOnly.push_back( projection( att, relationA ) );
}
//Push values into joint using our indexes
for ( unsigned i = 0; i < indexInA.size( ); i++ ){
vector<string> att;
att.push_back( relationA->getAttributeAt( indexInA.at( i ) ).name );
shared.push_back( projection( att, relationA ) );
}
//Push values into bOnly using our indexes
for ( unsigned i = 0; i < indexBOnly.size( ); i++ ){
vector<string> att;
att.push_back( relationB->getAttributeAt( indexBOnly.at( i ) ).name );
bOnly.push_back( projection( att, relationB ) );
}
int numRows = relationA->getNumTuples( );
//This for loop consturcts a tuple based on the three preceding relatinos. We add
//a helper function which maps a row in a to a row in b since they may be in a different order
for ( int i = 0; i < numRows; i++ ){
vector<Entry*> newRow;
for ( unsigned j = 0; j < aOnly.size( ); j++ ){
newRow.push_back( aOnly.at( j ).getEntry( i, 0 ) );
}
for ( unsigned j = 0; j < shared.size( ); j++ ){
newRow.push_back( shared.at( j ).getEntry( i, 0 ) );
}
int row = findCorrespondingRow( relationA->getRow( i ), indexInA, relationB, indexInB );
for ( unsigned j = 0; j < bOnly.size( ); j++ ){
newRow.push_back( bOnly.at( j ).getEntry( row, 0 ) );
}
myResult.addRow( newRow );
}
result = myResult;
return result;
}