smaller expr

Author: alamb

datafusion/expr/src/expr.rs

@@ -3834,7 +3834,7 @@ mod test {
         // If this test fails when you change `Expr`, please try
         // `Box`ing the fields to make `Expr` smaller
         // See https://github.com/apache/datafusion/issues/16199 for details
-        assert_eq!(size_of::<Expr>(), 144);
+        assert_eq!(size_of::<Expr>(), 128);
         assert_eq!(size_of::<ScalarValue>(), 64);
         assert_eq!(size_of::<DataType>(), 24); // 3 ptrs
         assert_eq!(size_of::<Vec<Expr>>(), 24);