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Optional aggregation columns shortcut the computation to an empty dataset #239
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@OlivierBlanvillain, this was the reason master was failing. The doesn't doesn't always break only when it happens to generate an empty Option. |
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so it seems that if during an aggregation the first aggregate returns null, then it doesn't even care about the next results, it just returns nothing. Going to look if this is a Spark bug and not a Frameless one. Nope, the issue seems to be on our side of the fence
Test that fails randomly due to this issue (NonAggregateFunctionsTests.scala).
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