C++ Column::rowCount方法代码示例

//.........这里部分代码省略.........
					rightTable->columnNames()[0]);
			string rightTableColType = rightTableColumn->getColumnType();

			if (rightTable->columnCount() != 1) {
				throw DatabaseException(18,
						stringRight + " must have 1 column for ANY/ALL.");
			} else if (leftColType.compare(rightTableColType) != 0
					&& !((leftColType == "int" && rightTableColType == "float")
							|| (leftColType == "float"
									&& rightTableColType == "int"))) {
				throw DatabaseException(
						13,
						leftColType + " is not the same as "
								+ rightTableColType);
			}

			int funcType = -1;
			string op = "";
			switch (SWITCH) {
			case ANY:
				funcType = 1;
				op = value.substr(0, value.find("ANY"));
				break;
			case ALL:
				funcType = 2;
				op = value.substr(0, value.find("ALL"));
				break;
			}
			LogicHandler * temp = new LogicHandler("LEFT" + op + "RIGHT");
			temp->parse();
			vector<string> inserts;
			inserts.push_back("LEFT");
			inserts.push_back("RIGHT");
			ExpressionTree * tree = temp->getTree();

			for (int i = 0; i < leftCol->rowCount(); i++) {

				string leftInput = leftCol->getValueAtRowIndex(i);

//				cout<<"\n\nLEFT INPUT IS "<<leftInput<<endl;
//				cout<<"\n\nfollows "<<leftCol->printDataList()<<"index is "<<i<<endl;

				for (int j = 0; j < rightTableColumn->rowCount(); j++) {
					string rightInput = rightTableColumn->getValueAtRowIndex(j);
					vector<string> throwaway;
					throwaway.push_back(leftInput);
					throwaway.push_back(rightInput);
					bool eval = tree->isTrue(inserts, throwaway);

					if (funcType == 1 && eval) {
						return "1";
					} else if (funcType == 2 && !eval) {
						return "0";
					}
				}
			}

			result = (funcType == 1) ? "0" : "1";

		}
			break;
		case IN: //FIXX: Does not catch if the column types differ. Convert types
		{
			result = "0";

			if (db->countColumnsByTable(stringRight) != 1) {
				throw DatabaseException(18,
						stringRight + " does not have only 1 column.");
			}

			Table *theTable = db->findTable(stringRight);

			vector<string> column = theTable->columnNames();

			Column *theColumn = theTable->findColumn(column[0]);

			for (int i = 0; i < theColumn->rowCount(); i++) {
				if (stringLeft == theColumn->getValueAtRowIndex(i)) {
					result = "1";
					break;
				}
			}

		}
			break;
		case EXIST: {
			Table * table = db->findTable(stringRight);
			if (table == NULL) {
				result = "0";
			} else if (table->columnCount() >= 1) {
				result = "1";
			} else {
				result = "0";
			}
		}
			break;
		}
		num = result;
		//this is an operation
	} else {