alamb commented on code in PR #17450:
URL: https://github.com/apache/datafusion/pull/17450#discussion_r2352029518
##########
datafusion/optimizer/src/simplify_expressions/expr_simplifier.rs:
##########
@@ -1399,6 +1399,18 @@ impl<S: SimplifyInfo> TreeNodeRewriter for
Simplifier<'_, S> {
// Rules for Case
//
+ // CASE WHEN true THEN A ... END --> A
+ Expr::Case(Case {
+ expr: None,
+ mut when_then_expr,
+ else_expr: _,
+ }) if !when_then_expr.is_empty()
Review Comment:
- Filed https://github.com/apache/datafusion/issues/17589 to track
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