Closed lwz9103 closed 3 months ago
Difference between sum and sum0: If agg data is empty, sum(nullable_col) return \N, but sum0 return 0. which code take effect:
AggregateFunctionProperties properties = { .returns_default_when_only_null = true, .is_order_dependent = false }
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Documentation entry for user-facing changes
Difference between sum and sum0: If agg data is empty, sum(nullable_col) return \N, but sum0 return 0. which code take effect:
ClickHouse plan difference: