Method minimum

src/backend/core/column/Column.cpp:1777–1790

! * calculates the minimal value in the column. * for \c count = 0, the minimum of all elements is returned. * for \c count > 0, the minimum of the first \p count elements is returned. * for \c count < 0, the minimum of the last \p count elements is returned. */

 * for \c count < 0, the minimum of the last \p count elements is returned.
 */
double Column::minimum(int count) const {
	if (count == 0 && d->available.min)
		return d->statistics.minimum;
	else {
		int startIndex = 0, endIndex = rowCount() - 1;

		if (count > 0)
			endIndex = std::min(rowCount() - 1, count - 1);
		else if (count < 0)
			startIndex = std::max(rowCount() - count, 0);

		return minimum(startIndex, endIndex);
	}
}

/*!
 * \brief Column::minimum