Remove as_any() from ScalarUDFImpl impls and fix Cast field access

Prepare for DataFusion 54 which removes `as_any()` from `ScalarUDFImpl`
and changes `Cast::data_type` to `Cast::field`.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: adriangb

.gitignore

@@ -1,3 +1,4 @@
 /target
 Cargo.lock
 .idea
+.history

src/json_as_text.rs

@@ -1,4 +1,3 @@
-use std::any::Any;
 use std::sync::Arc;
 
 use datafusion::arrow::array::{ArrayRef, StringArray, StringBuilder};
@@ -33,9 +32,6 @@ impl Default for JsonAsText {
 }
 
 impl ScalarUDFImpl for JsonAsText {
-    fn as_any(&self) -> &dyn Any {
-        self
-    }
 
     fn name(&self) -> &str {
         self.aliases[0].as_str()

src/json_contains.rs

@@ -1,4 +1,3 @@
-use std::any::Any;
 use std::sync::Arc;
 
 use datafusion::arrow::array::BooleanBuilder;
@@ -33,9 +32,6 @@ impl Default for JsonContains {
 }
 
 impl ScalarUDFImpl for JsonContains {
-    fn as_any(&self) -> &dyn Any {
-        self
-    }
 
     fn name(&self) -> &str {
         self.aliases[0].as_str()

src/json_from_scalar.rs

@@ -1,4 +1,3 @@
-use std::any::Any;
 use std::sync::Arc;
 
 use datafusion::arrow::array::{Array, ArrayRef, AsArray, UnionArray};
@@ -35,9 +34,6 @@ impl Default for JsonFromScalar {
 }
 
 impl ScalarUDFImpl for JsonFromScalar {
-    fn as_any(&self) -> &dyn Any {
-        self
-    }
 
     fn name(&self) -> &str {
         self.aliases[0].as_str()

src/json_get.rs

@@ -1,4 +1,3 @@
-use std::any::Any;
 use std::sync::Arc;
 
 use datafusion::arrow::array::ArrayRef;
@@ -39,9 +38,6 @@ impl Default for JsonGet {
 }
 
 impl ScalarUDFImpl for JsonGet {
-    fn as_any(&self) -> &dyn Any {
-        self
-    }
 
     fn name(&self) -> &str {
         self.aliases[0].as_str()

src/json_get_array.rs

@@ -1,4 +1,3 @@
-use std::any::Any;
 use std::sync::Arc;
 
 use datafusion::arrow::array::{ArrayRef, ListBuilder, StringBuilder};
@@ -33,9 +32,6 @@ impl Default for JsonGetArray {
 }
 
 impl ScalarUDFImpl for JsonGetArray {
-    fn as_any(&self) -> &dyn Any {
-        self
-    }
 
     fn name(&self) -> &str {
         self.aliases[0].as_str()

src/json_get_bool.rs

@@ -1,4 +1,3 @@
-use std::any::Any;
 
 use datafusion::arrow::array::BooleanArray;
 use datafusion::arrow::datatypes::DataType;
@@ -32,9 +31,6 @@ impl Default for JsonGetBool {
 }
 
 impl ScalarUDFImpl for JsonGetBool {
-    fn as_any(&self) -> &dyn Any {
-        self
-    }
 
     fn name(&self) -> &str {
         self.aliases[0].as_str()

src/json_get_float.rs

@@ -1,4 +1,3 @@
-use std::any::Any;
 use std::sync::Arc;
 
 use datafusion::arrow::array::{ArrayRef, Float64Array, Float64Builder};
@@ -33,9 +32,6 @@ impl Default for JsonGetFloat {
 }
 
 impl ScalarUDFImpl for JsonGetFloat {
-    fn as_any(&self) -> &dyn Any {
-        self
-    }
 
     fn name(&self) -> &str {
         self.aliases[0].as_str()

src/json_get_int.rs

@@ -1,4 +1,3 @@
-use std::any::Any;
 use std::sync::Arc;
 
 use datafusion::arrow::array::{ArrayRef, Int64Array, Int64Builder};
@@ -33,9 +32,6 @@ impl Default for JsonGetInt {
 }
 
 impl ScalarUDFImpl for JsonGetInt {
-    fn as_any(&self) -> &dyn Any {
-        self
-    }
 
     fn name(&self) -> &str {
         self.aliases[0].as_str()

src/json_get_json.rs

@@ -1,4 +1,3 @@
-use std::any::Any;
 
 use datafusion::arrow::array::StringArray;
 use datafusion::arrow::datatypes::DataType;
@@ -31,9 +30,6 @@ impl Default for JsonGetJson {
 }
 
 impl ScalarUDFImpl for JsonGetJson {
-    fn as_any(&self) -> &dyn Any {
-        self
-    }
 
     fn name(&self) -> &str {
         self.aliases[0].as_str()