Backport to 37: make udf structs public

datafusion/functions-array/src/array_has.rs

@@ -54,11 +54,17 @@ make_udf_function!(ArrayHasAny,
 );
 
 #[derive(Debug)]
-pub(super) struct ArrayHas {
+pub struct ArrayHas {
     signature: Signature,
     aliases: Vec<String>,
 }
 
+impl Default for ArrayHas {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
 impl ArrayHas {
     pub fn new() -> Self {
         Self {
@@ -121,11 +127,17 @@ impl ScalarUDFImpl for ArrayHas {
 }
 
 #[derive(Debug)]
-pub(super) struct ArrayHasAll {
+pub struct ArrayHasAll {
     signature: Signature,
     aliases: Vec<String>,
 }
 
+impl Default for ArrayHasAll {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
 impl ArrayHasAll {
     pub fn new() -> Self {
         Self {
@@ -178,11 +190,17 @@ impl ScalarUDFImpl for ArrayHasAll {
 }
 
 #[derive(Debug)]
-pub(super) struct ArrayHasAny {
+pub struct ArrayHasAny {
     signature: Signature,
     aliases: Vec<String>,
 }
 
+impl Default for ArrayHasAny {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
 impl ArrayHasAny {
     pub fn new() -> Self {
         Self {

datafusion/functions-array/src/concat.rs

@@ -45,11 +45,17 @@ make_udf_function!(
 );
 
 #[derive(Debug)]
-pub(super) struct ArrayAppend {
+pub struct ArrayAppend {
     signature: Signature,
     aliases: Vec<String>,
 }
 
+impl Default for ArrayAppend {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
 impl ArrayAppend {
     pub fn new() -> Self {
         Self {
@@ -99,11 +105,17 @@ make_udf_function!(
 );
 
 #[derive(Debug)]
-pub(super) struct ArrayPrepend {
+pub struct ArrayPrepend {
     signature: Signature,
     aliases: Vec<String>,
 }
 
+impl Default for ArrayPrepend {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
 impl ArrayPrepend {
     pub fn new() -> Self {
         Self {
@@ -152,11 +164,17 @@ make_udf_function!(
 );
 
 #[derive(Debug)]
-pub(super) struct ArrayConcat {
+pub struct ArrayConcat {
     signature: Signature,
     aliases: Vec<String>,
 }
 
+impl Default for ArrayConcat {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
 impl ArrayConcat {
     pub fn new() -> Self {
         Self {

datafusion/functions-array/src/lib.rs

@@ -28,28 +28,28 @@
 #[macro_use]
 pub mod macros;
 
-mod array_has;
-mod cardinality;
-mod concat;
-mod dimension;
-mod empty;
-mod except;
-mod extract;
-mod flatten;
-mod length;
-mod make_array;
-mod position;
-mod range;
-mod remove;
-mod repeat;
-mod replace;
-mod resize;
-mod reverse;
-mod rewrite;
-mod set_ops;
-mod sort;
-mod string;
-mod utils;
+pub mod array_has;
+pub mod cardinality;
+pub mod concat;
+pub mod dimension;
+pub mod empty;
+pub mod except;
+pub mod extract;
+pub mod flatten;
+pub mod length;
+pub mod make_array;
+pub mod position;
+pub mod range;
+pub mod remove;
+pub mod repeat;
+pub mod replace;
+pub mod resize;
+pub mod reverse;
+pub mod rewrite;
+pub mod set_ops;
+pub mod sort;
+pub mod string;
+pub mod utils;
 
 use datafusion_common::Result;
 use datafusion_execution::FunctionRegistry;

datafusion/functions-array/src/make_array.rs

@@ -48,6 +48,12 @@ pub struct MakeArray {
     aliases: Vec<String>,
 }
 
+impl Default for MakeArray {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
 impl MakeArray {
     pub fn new() -> Self {
         Self {