Remove useless code

Signed-off-by: Chojan Shang <[email protected]>

Author: PsiACE

datafusion/functions/src/string/levenshtein.rs

@@ -74,8 +74,7 @@ impl ScalarUDFImpl for LevenshteinFunc {
 
     fn invoke(&self, args: &[ColumnarValue]) -> Result<ColumnarValue> {
         match args[0].data_type() {
-            DataType::Utf8View => make_scalar_function(levenshtein::<i32>, vec![])(args),
-            DataType::Utf8 => make_scalar_function(levenshtein::<i32>, vec![])(args),
+            DataType::Utf8View | DataType::Utf8 => make_scalar_function(levenshtein::<i32>, vec![])(args),
             DataType::LargeUtf8 => make_scalar_function(levenshtein::<i64>, vec![])(args),
             other => {
                 exec_err!("Unsupported data type {other:?} for function levenshtein")
@@ -96,20 +95,7 @@ pub fn levenshtein<T: OffsetSizeTrait>(args: &[ArrayRef]) -> Result<ArrayRef> {
     let str1_array = as_generic_string_array::<T>(&args[0])?;
     let str2_array = as_generic_string_array::<T>(&args[1])?;
     match args[0].data_type() {
-        DataType::Utf8View => {
-            let result = str1_array
-                .iter()
-                .zip(str2_array.iter())
-                .map(|(string1, string2)| match (string1, string2) {
-                    (Some(string1), Some(string2)) => {
-                        Some(datafusion_strsim::levenshtein(string1, string2) as i32)
-                    }
-                    _ => None,
-                })
-                .collect::<Int32Array>();
-            Ok(Arc::new(result) as ArrayRef)
-        }
-        DataType::Utf8 => {
+        DataType::Utf8View | DataType::Utf8 => {
             let result = str1_array
                 .iter()
                 .zip(str2_array.iter())