diff --git a/src/expr/core/src/window_function/call.rs b/src/expr/core/src/window_function/call.rs
index 6e89eef135c6c..d76aee81196fb 100644
--- a/src/expr/core/src/window_function/call.rs
+++ b/src/expr/core/src/window_function/call.rs
@@ -92,9 +92,12 @@ impl Frame {
         let bounds = match frame.get_type()? {
             PbType::Unspecified => bail!("unspecified type of `WindowFrame`"),
             PbType::RowsLegacy => {
-                let start = FrameBound::<usize>::from_protobuf_legacy(frame.get_start()?)?;
-                let end = FrameBound::<usize>::from_protobuf_legacy(frame.get_end()?)?;
-                FrameBounds::Rows(RowsFrameBounds { start, end })
+                #[expect(deprecated)]
+                {
+                    let start = FrameBound::<usize>::from_protobuf_legacy(frame.get_start()?)?;
+                    let end = FrameBound::<usize>::from_protobuf_legacy(frame.get_end()?)?;
+                    FrameBounds::Rows(RowsFrameBounds { start, end })
+                }
             }
             PbType::Rows => {
                 let bounds = must_match!(frame.get_bounds()?, PbBounds::Rows(bounds) => bounds);
diff --git a/src/prost/helpers/src/generate.rs b/src/prost/helpers/src/generate.rs
index eb7a5589dd1b9..52784f7ec489f 100644
--- a/src/prost/helpers/src/generate.rs
+++ b/src/prost/helpers/src/generate.rs
@@ -17,8 +17,8 @@ use quote::quote;
 use syn::ext::IdentExt;
 use syn::spanned::Spanned;
 use syn::{
-    Error, Expr, ExprLit, Field, GenericArgument, Lit, Meta, PathArguments, PathSegment, Result,
-    Type,
+    AttrStyle, Attribute, Error, Expr, ExprLit, Field, GenericArgument, Lit, Meta, Path,
+    PathArguments, PathSegment, Result, Type,
 };
 
 fn extract_type_from_option(option_segment: &PathSegment) -> Type {
@@ -83,6 +83,13 @@ fn extract_enum_type_from_field(field: &Field) -> Option<Type> {
     Some(syn::parse_str::<Type>(&enum_type.value()).unwrap())
 }
 
+fn is_deprecated(field: &Field) -> bool {
+    field.attrs.iter().any(|attr| match &attr.meta {
+        Meta::Path(path) => path.is_ident("deprecated"),
+        _ => false,
+    })
+}
+
 pub fn implement(field: &Field) -> Result<TokenStream2> {
     let field_name = field
         .clone()
@@ -90,9 +97,22 @@ pub fn implement(field: &Field) -> Result<TokenStream2> {
         .ok_or_else(|| Error::new(field.span(), "Expected the field to have a name"))?;
 
     let getter_fn_name = Ident::new(&format!("get_{}", field_name.unraw()), Span::call_site());
+    let is_deprecated = is_deprecated(field);
+
+    let attr_list: Vec<Attribute> = if is_deprecated {
+        vec![Attribute {
+            pound_token: Default::default(),
+            style: AttrStyle::Outer,
+            bracket_token: Default::default(),
+            meta: Meta::from(Path::from(Ident::new("deprecated", Span::call_site()))),
+        }]
+    } else {
+        vec![]
+    };
 
     if let Some(enum_type) = extract_enum_type_from_field(field) {
         return Ok(quote! {
+            #(#attr_list)*
             #[inline(always)]
             pub fn #getter_fn_name(&self) -> std::result::Result<#enum_type, crate::PbFieldNotFound> {
                 if self.#field_name.eq(&0) {
@@ -110,6 +130,7 @@ pub fn implement(field: &Field) -> Result<TokenStream2> {
             // ::core::option::Option<Foo>
             let ty = extract_type_from_option(data_type);
             return Ok(quote! {
+                #(#attr_list)*
                 #[inline(always)]
                 pub fn #getter_fn_name(&self) -> std::result::Result<&#ty, crate::PbFieldNotFound> {
                     self.#field_name.as_ref().ok_or_else(|| crate::PbFieldNotFound(stringify!(#field_name)))
@@ -120,6 +141,7 @@ pub fn implement(field: &Field) -> Result<TokenStream2> {
         {
             // Primitive types. Return value instead of reference.
             return Ok(quote! {
+                #(#attr_list)*
                 #[inline(always)]
                 pub fn #getter_fn_name(&self) -> #ty {
                     self.#field_name
@@ -129,6 +151,7 @@ pub fn implement(field: &Field) -> Result<TokenStream2> {
     }
 
     Ok(quote! {
+        #(#attr_list)*
         #[inline(always)]
         pub fn #getter_fn_name(&self) -> &#ty {
             &self.#field_name