jackwener commented on code in PR #6595:
URL: https://github.com/apache/arrow-datafusion/pull/6595#discussion_r1227618012
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datafusion/optimizer/src/simplify_expressions/expr_simplifier.rs:
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@@ -206,7 +206,16 @@ impl<'a> TreeNodeRewriter for ConstEvaluator<'a> {
fn mutate(&mut self, expr: Expr) -> Result<Expr> {
match self.can_evaluate.pop() {
- Some(true) => Ok(Expr::Literal(self.evaluate_to_scalar(expr)?)),
+ Some(true) => {
+ // After simplifying the expression, data_type may change, so
we need to cast it.
Review Comment:
Correct it
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