make starts_with private

Author: yurunjie

datafusion/functions/src/string/starts_with.rs

@@ -20,8 +20,10 @@ use std::sync::Arc;
 
 use arrow::array::ArrayRef;
 use arrow::datatypes::DataType;
-use datafusion_expr::binary::{binary_to_string_coercion, string_coercion};
 use datafusion_expr::simplify::{ExprSimplifyResult, SimplifyInfo};
+use datafusion_expr::type_coercion::binary::{
+    binary_to_string_coercion, string_coercion,
+};
 
 use crate::utils::make_scalar_function;
 use datafusion_common::types::logical_string;
@@ -34,7 +36,7 @@ use datafusion_macros::user_doc;
 
 /// Returns true if string starts with prefix.
 /// starts_with('alphabet', 'alph') = 't'
-pub fn starts_with(args: &[ArrayRef]) -> Result<ArrayRef> {
+fn starts_with(args: &[ArrayRef]) -> Result<ArrayRef> {
     if let Some(coercion_data_type) =
         string_coercion(args[0].data_type(), args[1].data_type()).or_else(|| {
             binary_to_string_coercion(args[0].data_type(), args[1].data_type())