pepijnve commented on code in PR #17898:
URL: https://github.com/apache/datafusion/pull/17898#discussion_r2433189254
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datafusion/physical-expr/src/expressions/case.rs:
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@@ -208,10 +208,19 @@ impl CaseExpr {
let mut current_value = new_null_array(&return_type, batch.num_rows());
// We only consider non-null values while comparing with whens
let mut remainder = not(&base_nulls)?;
+ let mut remainder_count = remainder.true_count();
Review Comment:
I'm going to leave the more complex optimisation work for another PR. The
short circuit logic is already useful on it's own.
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