Method hasValueAt

src/backend/core/column/Column.cpp:858–883

! * return \c true if the column has a valid value in the row \row. */

 * return \c true if the column has a valid value in the row \row.
 */
bool Column::hasValueAt(int row) const {
	bool foundValue = false;
	switch (columnMode()) {
	case ColumnMode::Double: {
		foundValue = !std::isnan(doubleAt(row));
		break;
	}
	case ColumnMode::Text: {
		foundValue = !textAt(row).isEmpty();
		break;
	}
	case ColumnMode::Integer:
	case ColumnMode::BigInt:
		// integer values are always valid
		foundValue = true;
		break;
	case ColumnMode::DateTime:
	case ColumnMode::Month:
	case ColumnMode::Day: {
		foundValue = dateTimeAt(row).isValid();
		break;
	}
	}

	return foundValue;
}

/*
 * set item at i to col[j] for same columnMode()