feat: add proto annotation for non-ascii field mapping (#1776)

- [ ] Regenerate this pull request now.

PiperOrigin-RevId: 473815595

Source-Link: googleapis/googleapis@46cfc4c

Source-Link: https://github.com/googleapis/googleapis-gen/commit/955ca31d81100d81ed7e0ae0522358ac45d53cc9
Copy-Tag: eyJwIjoiLmdpdGh1Yi8uT3dsQm90LnlhbWwiLCJoIjoiOTU1Y2EzMWQ4MTEwMGQ4MWVkN2UwYWUwNTIyMzU4YWM0NWQ1M2NjOSJ9

proto-google-cloud-bigquerystorage-v1/src/main/java/com/google/cloud/bigquery/storage/v1/AnnotationsProto.java

@@ -0,0 +1,86 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/cloud/bigquery/storage/v1/annotations.proto
+
+package com.google.cloud.bigquery.storage.v1;
+
+public final class AnnotationsProto {
+  private AnnotationsProto() {}
+
+  public static void registerAllExtensions(com.google.protobuf.ExtensionRegistryLite registry) {
+    registry.add(com.google.cloud.bigquery.storage.v1.AnnotationsProto.columnName);
+  }
+
+  public static void registerAllExtensions(com.google.protobuf.ExtensionRegistry registry) {
+    registerAllExtensions((com.google.protobuf.ExtensionRegistryLite) registry);
+  }
+
+  public static final int COLUMN_NAME_FIELD_NUMBER = 454943157;
+  /**
+   *
+   *
+   * <pre>
+   * 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.
+   * </pre>
+   *
+   * <code>extend .google.protobuf.FieldOptions { ... }</code>
+   */
+  public static final com.google.protobuf.GeneratedMessage.GeneratedExtension<
+          com.google.protobuf.DescriptorProtos.FieldOptions, java.lang.String>
+      columnName =
+          com.google.protobuf.GeneratedMessage.newFileScopedGeneratedExtension(
+              java.lang.String.class, null);
+
+  public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
+    return descriptor;
+  }
+
+  private static com.google.protobuf.Descriptors.FileDescriptor descriptor;
+
+  static {
+    java.lang.String[] descriptorData = {
+      "\n2google/cloud/bigquery/storage/v1/annot"
+          + "ations.proto\022 google.cloud.bigquery.stor"
+          + "age.v1\032 google/protobuf/descriptor.proto"
+          + ":9\n\013column_name\022\035.google.protobuf.FieldO"
+          + "ptions\030\265\303\367\330\001 \001(\t\210\001\001B\311\001\n$com.google.cloud"
+          + ".bigquery.storage.v1B\020AnnotationsProtoP\001"
+          + "ZGgoogle.golang.org/genproto/googleapis/"
+          + "cloud/bigquery/storage/v1;storage\252\002 Goog"
+          + "le.Cloud.BigQuery.Storage.V1\312\002 Google\\Cl"
+          + "oud\\BigQuery\\Storage\\V1b\006proto3"
+    };
+    descriptor =
+        com.google.protobuf.Descriptors.FileDescriptor.internalBuildGeneratedFileFrom(
+            descriptorData,
+            new com.google.protobuf.Descriptors.FileDescriptor[] {
+              com.google.protobuf.DescriptorProtos.getDescriptor(),
+            });
+    columnName.internalInit(descriptor.getExtensions().get(0));
+    com.google.protobuf.DescriptorProtos.getDescriptor();
+  }
+
+  // @@protoc_insertion_point(outer_class_scope)
+}

proto-google-cloud-bigquerystorage-v1/src/main/proto/google/cloud/bigquery/storage/v1/annotations.proto

@@ -0,0 +1,28 @@
+syntax = "proto3";
+
+package google.cloud.bigquery.storage.v1;
+
+import "google/protobuf/descriptor.proto";
+
+option csharp_namespace = "Google.Cloud.BigQuery.Storage.V1";
+option go_package = "google.golang.org/genproto/googleapis/cloud/bigquery/storage/v1;storage";
+option java_package = "com.google.cloud.bigquery.storage.v1";
+option java_multiple_files = true;
+option java_outer_classname = "AnnotationsProto";
+option php_namespace = "Google\\Cloud\\BigQuery\\Storage\\V1";
+
+extend google.protobuf.FieldOptions {
+  // 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.
+  optional string column_name = 454943157;
+}