feat: add proto annotation for non-ascii field mapping

PiperOrigin-RevId: 473815595

Source-Link: googleapis/googleapis@46cfc4c

Source-Link: googleapis/googleapis-gen@955ca31
Copy-Tag: eyJwIjoiYXBpcy9Hb29nbGUuQ2xvdWQuQmlnUXVlcnkuU3RvcmFnZS5WMS8uT3dsQm90LnlhbWwiLCJoIjoiOTU1Y2EzMWQ4MTEwMGQ4MWVkN2UwYWUwNTIyMzU4YWM0NWQ1M2NjOSJ9

apis/Google.Cloud.BigQuery.Storage.V1/Google.Cloud.BigQuery.Storage.V1/Annotations.g.cs

@@ -0,0 +1,65 @@
+// <auto-generated>
+//     Generated by the protocol buffer compiler.  DO NOT EDIT!
+//     source: google/cloud/bigquery/storage/v1/annotations.proto
+// </auto-generated>
+#pragma warning disable 1591, 0612, 3021, 8981
+#region Designer generated code
+
+using pb = global::Google.Protobuf;
+using pbc = global::Google.Protobuf.Collections;
+using pbr = global::Google.Protobuf.Reflection;
+using scg = global::System.Collections.Generic;
+namespace Google.Cloud.BigQuery.Storage.V1 {
+
+  /// <summary>Holder for reflection information generated from google/cloud/bigquery/storage/v1/annotations.proto</summary>
+  public static partial class AnnotationsReflection {
+
+    #region Descriptor
+    /// <summary>File descriptor for google/cloud/bigquery/storage/v1/annotations.proto</summary>
+    public static pbr::FileDescriptor Descriptor {
+      get { return descriptor; }
+    }
+    private static pbr::FileDescriptor descriptor;
+
+    static AnnotationsReflection() {
+      byte[] descriptorData = global::System.Convert.FromBase64String(
+          string.Concat(
+            "CjJnb29nbGUvY2xvdWQvYmlncXVlcnkvc3RvcmFnZS92MS9hbm5vdGF0aW9u",
+            "cy5wcm90bxIgZ29vZ2xlLmNsb3VkLmJpZ3F1ZXJ5LnN0b3JhZ2UudjEaIGdv",
+            "b2dsZS9wcm90b2J1Zi9kZXNjcmlwdG9yLnByb3RvOjkKC2NvbHVtbl9uYW1l",
+            "Eh0uZ29vZ2xlLnByb3RvYnVmLkZpZWxkT3B0aW9ucxi1w/fYASABKAmIAQFC",
+            "yQEKJGNvbS5nb29nbGUuY2xvdWQuYmlncXVlcnkuc3RvcmFnZS52MUIQQW5u",
+            "b3RhdGlvbnNQcm90b1ABWkdnb29nbGUuZ29sYW5nLm9yZy9nZW5wcm90by9n",
+            "b29nbGVhcGlzL2Nsb3VkL2JpZ3F1ZXJ5L3N0b3JhZ2UvdjE7c3RvcmFnZaoC",
+            "IEdvb2dsZS5DbG91ZC5CaWdRdWVyeS5TdG9yYWdlLlYxygIgR29vZ2xlXENs",
+            "b3VkXEJpZ1F1ZXJ5XFN0b3JhZ2VcVjFiBnByb3RvMw=="));
+      descriptor = pbr::FileDescriptor.FromGeneratedCode(descriptorData,
+          new pbr::FileDescriptor[] { global::Google.Protobuf.Reflection.DescriptorReflection.Descriptor, },
+          new pbr::GeneratedClrTypeInfo(null, new pb::Extension[] { AnnotationsExtensions.ColumnName }, null));
+    }
+    #endregion
+
+  }
+  /// <summary>Holder for extension identifiers generated from the top level of google/cloud/bigquery/storage/v1/annotations.proto</summary>
+  public static partial class AnnotationsExtensions {
+    /// <summary>
+    /// Setting the column_name extension allows users to reference
+    /// bigquery column independently of the field name in the protocol buffer
+    /// message.
+    ///
+    /// The intended use of this annotation is to reference a destination column
+    /// named using characters unavailable for protobuf field names (e.g. unicode
+    /// characters).
+    ///
+    /// More details about BigQuery naming limitations can be found here:
+    /// https://cloud.google.com/bigquery/docs/schemas#column_names
+    ///
+    /// This extension is currently experimental.
+    /// </summary>
+    public static readonly pb::Extension<global::Google.Protobuf.Reflection.FieldOptions, string> ColumnName =
+      new pb::Extension<global::Google.Protobuf.Reflection.FieldOptions, string>(454943157, pb::FieldCodec.ForString(3639545258, ""));
+  }
+
+}
+
+#endregion Designer generated code

apis/Google.Cloud.BigQuery.Storage.V1/Google.Cloud.BigQuery.Storage.V1/PackageApiMetadata.g.cs

@@ -29,6 +29,7 @@ internal static class PackageApiMetadata
 
         private static scg::IEnumerable<gpr::FileDescriptor> GetFileDescriptors()
         {
+            yield return AnnotationsReflection.Descriptor;
             yield return ArrowReflection.Descriptor;
             yield return AvroReflection.Descriptor;
             yield return ProtobufReflection.Descriptor;