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fix: TrivialValueAccumulators to ignore null states for ignore nulls #16918

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fix: TrivialValueAccumulators to ignore null states for ignore nulls #16918

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14 changes: 10 additions & 4 deletions datafusion/functions-aggregate/src/first_last.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -833,8 +833,11 @@ impl Accumulator for TrivialFirstValueAccumulator {
filter_states_according_to_is_set(&states[0..1], flags)?;
if let Some(first) = filtered_states.first() {
if !first.is_empty() {
self.first = ScalarValue::try_from_array(first, 0)?;
self.is_set = true;
let first = ScalarValue::try_from_array(first, 0)?;
if !self.ignore_nulls || !first.is_null() {
self.first = first;
self.is_set = true;
}
}
}
}
Expand Down Expand Up @@ -1326,8 +1329,11 @@ impl Accumulator for TrivialLastValueAccumulator {
let filtered_states = filter_states_according_to_is_set(&states[0..1], flags)?;
if let Some(last) = filtered_states.last() {
if !last.is_empty() {
self.last = ScalarValue::try_from_array(last, 0)?;
self.is_set = true;
let last = ScalarValue::try_from_array(last, 0)?;
if !self.ignore_nulls || !last.is_null() {
self.last = last;
self.is_set = true;
}
}
}
Ok(())
Expand Down