void JoinOperator::updateExpression(Expression *exp, unordered_map<string, Expression*> lm, unordered_map<string, Expression*> rm
, string ltable, string rtable) {
ExprType t = exp->getType();
if(t != ExprType::COLEXPRESSION && t != ExprType::DOUBLEVALUEEXPRESSION && t != ExprType::STRINGVALUEEXPRESSION &&
t != ExprType::LONGVALUEEXPRESSION && t != ExprType::DATEVALUEEXPRESSION){
BinaryExpression* bexp = (BinaryExpression*)exp;
updateExpression(bexp->getLeftExpression(), lm, rm, ltable, rtable);
updateExpression(bexp->getRightExpression(), lm, rm, ltable, rtable);
} else if(t == COLEXPRESSION){
ColExpression* col = (ColExpression*)exp;
if(lm.find(col->getQualifiedName()) != lm.end()){
ColExpression* e = (ColExpression*)lm[col->getQualifiedName()];
col->setType(e->getDataType());
col->setColPos(e->getColPos());
left.push_back(col);
} else if(rm.find(col->getQualifiedName()) != rm.end()){
ColExpression* e = (ColExpression*)rm[col->getQualifiedName()];
col->setType(e->getDataType());
col->setColPos(e->getColPos() + (int)lm.size());
ColExpression *rcol = new ColExpression(col->getQualifiedName(), col->getColPos()-(int)lm.size(), col->getDataType());
right.push_back(rcol);
} else {
std::cout << "column : " << col->getQualifiedName() << " not found in any schema " << std::endl;
}
}
}
void ProjectionOperator::updateExpression(Expression *newExp, unordered_map<std::string, Expression *> m, string tableName) {
ExprType t = newExp->getType();
if(t != ExprType::COLEXPRESSION && t != ExprType::DOUBLEVALUEEXPRESSION && t != ExprType::STRINGVALUEEXPRESSION &&
t != ExprType::LONGVALUEEXPRESSION && t != ExprType::DATEVALUEEXPRESSION){
BinaryExpression* b = (BinaryExpression*)newExp;
updateExpression(b->getLeftExpression(), m, tableName);
updateExpression(b->getRightExpression(), m, tableName);
} else if(t == ExprType::COLEXPRESSION){
if(((ColExpression*)newExp)->getTableName() == "")
((ColExpression*)newExp)->setTableName(tableName);
ColExpression* col = (ColExpression*)m[((ColExpression*)newExp)->getQualifiedName()];
((ColExpression*)newExp)->setColPos(col->getColPos());
((ColExpression*)newExp)->setType(col->getDataType());
}
}
DataType Expression::getDataType() {
ExprType t = this->getType();
if(t == STRINGVALUEEXPRESSION)
return STRING;
if(t == DOUBLEVALUEEXPRESSION)
return DOUBLE;
if(t == LONGVALUEEXPRESSION)
return LONG;
if(t == DATEVALUEEXPRESSION)
return DATE;
if(t == ADDITIONEXPRESSION || t == SUBTRACTIONEXPRESSION || t == MULTIPLICATIONEXPRESSION || t == DIVISIONEXPRESSION){
BinaryExpression* bexp = (BinaryExpression*)this;
DataType t1 = bexp->getLeftExpression()->getDataType();
DataType t2 = bexp->getRightExpression()->getDataType();
if(t1 == DOUBLE || t2 == DOUBLE)
return DOUBLE;
return LONG;
}
if(t == COLEXPRESSION)
return getDataType();
//Boolean
return LONG;
}