fix

apache · Dec 29, 2021 · d6a3e22 · d6a3e22
1 parent 89e6d31
commit d6a3e22
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/datafusion/src/optimizer/simplify_expressions.rs b/datafusion/src/optimizer/simplify_expressions.rs
@@ -405,7 +405,8 @@ impl<'a> Simplifier<'a> {
     /// Returns true if expr is nullable
     fn nullable(&self, expr: &Expr) -> Result<bool> {
         for schema in &self.schemas {
-            if expr.nullable(schema.as_ref())? {
+            // expr may be from another input
+            if expr.nullable(schema.as_ref()).unwrap_or(false) {
                 return Ok(true);
             }
         }