Comment by RedCrowbar
7 years ago
The difference is that `+` is defined as a strict function (returns empty on empty input): plus(a, b), whereas sum() is an aggregate that is specifically defined as 0 on empty input.
7 years ago
The difference is that `+` is defined as a strict function (returns empty on empty input): plus(a, b), whereas sum() is an aggregate that is specifically defined as 0 on empty input.
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