jayzhan211 commented on code in PR #9108:
URL: https://github.com/apache/arrow-datafusion/pull/9108#discussion_r1501932831


##########
datafusion/expr/src/built_in_function.rs:
##########
@@ -929,18 +930,18 @@ impl BuiltinScalarFunction {
                 // 0 or more arguments of arbitrary type
                 Signature::one_of(vec![VariadicEqual, Any(0)], 
self.volatility())
             }
-            BuiltinScalarFunction::ArrayPopFront => Signature::any(1, 
self.volatility()),
-            BuiltinScalarFunction::ArrayPopBack => Signature::any(1, 
self.volatility()),
+            BuiltinScalarFunction::ArrayPopFront => 
Signature::array(self.volatility()),
+            BuiltinScalarFunction::ArrayPopBack => 
Signature::array(self.volatility()),
             BuiltinScalarFunction::ArrayConcat => {
                 Signature::variadic_any(self.volatility())
             }
-            BuiltinScalarFunction::ArrayDims => Signature::any(1, 
self.volatility()),
-            BuiltinScalarFunction::ArrayEmpty => Signature::any(1, 
self.volatility()),
+            BuiltinScalarFunction::ArrayDims => 
Signature::array(self.volatility()),

Review Comment:
   test is not covered



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