ClickHouse Sums Floats with Kahan Compensation and a 128-Bit Decimal Accumulator
ClickHouse’s sumKahan carries a compensation term and reconstructs the lost low bits on every add; sum over Decimal widens the accumulator to Decimal128.
ClickHouse’s sumKahan carries a compensation term and reconstructs the lost low bits on every add; sum over Decimal widens the accumulator to Decimal128.