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diff --git a/third_party/googleapis/google/spanner/v1/mutation.proto b/third_party/googleapis/google/spanner/v1/mutation.proto
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+// Copyright 2017 Google Inc.
+//
+// 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
+//
+//     http://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.
+
+syntax = "proto3";
+
+package google.spanner.v1;
+
+import "google/api/annotations.proto";
+import "google/protobuf/struct.proto";
+import "google/spanner/v1/keys.proto";
+
+option csharp_namespace = "Google.Cloud.Spanner.V1";
+option go_package = "google.golang.org/genproto/googleapis/spanner/v1;spanner";
+option java_multiple_files = true;
+option java_outer_classname = "MutationProto";
+option java_package = "com.google.spanner.v1";
+
+
+// A modification to one or more Cloud Spanner rows.  Mutations can be
+// applied to a Cloud Spanner database by sending them in a
+// [Commit][google.spanner.v1.Spanner.Commit] call.
+message Mutation {
+  // Arguments to [insert][google.spanner.v1.Mutation.insert], [update][google.spanner.v1.Mutation.update], [insert_or_update][google.spanner.v1.Mutation.insert_or_update], and
+  // [replace][google.spanner.v1.Mutation.replace] operations.
+  message Write {
+    // Required. The table whose rows will be written.
+    string table = 1;
+
+    // The names of the columns in [table][google.spanner.v1.Mutation.Write.table] to be written.
+    //
+    // The list of columns must contain enough columns to allow
+    // Cloud Spanner to derive values for all primary key columns in the
+    // row(s) to be modified.
+    repeated string columns = 2;
+
+    // The values to be written. `values` can contain more than one
+    // list of values. If it does, then multiple rows are written, one
+    // for each entry in `values`. Each list in `values` must have
+    // exactly as many entries as there are entries in [columns][google.spanner.v1.Mutation.Write.columns]
+    // above. Sending multiple lists is equivalent to sending multiple
+    // `Mutation`s, each containing one `values` entry and repeating
+    // [table][google.spanner.v1.Mutation.Write.table] and [columns][google.spanner.v1.Mutation.Write.columns]. Individual values in each list are
+    // encoded as described [here][google.spanner.v1.TypeCode].
+    repeated google.protobuf.ListValue values = 3;
+  }
+
+  // Arguments to [delete][google.spanner.v1.Mutation.delete] operations.
+  message Delete {
+    // Required. The table whose rows will be deleted.
+    string table = 1;
+
+    // Required. The primary keys of the rows within [table][google.spanner.v1.Mutation.Delete.table] to delete.
+    KeySet key_set = 2;
+  }
+
+  // Required. The operation to perform.
+  oneof operation {
+    // Insert new rows in a table. If any of the rows already exist,
+    // the write or transaction fails with error `ALREADY_EXISTS`.
+    Write insert = 1;
+
+    // Update existing rows in a table. If any of the rows does not
+    // already exist, the transaction fails with error `NOT_FOUND`.
+    Write update = 2;
+
+    // Like [insert][google.spanner.v1.Mutation.insert], except that if the row already exists, then
+    // its column values are overwritten with the ones provided. Any
+    // column values not explicitly written are preserved.
+    Write insert_or_update = 3;
+
+    // Like [insert][google.spanner.v1.Mutation.insert], except that if the row already exists, it is
+    // deleted, and the column values provided are inserted
+    // instead. Unlike [insert_or_update][google.spanner.v1.Mutation.insert_or_update], this means any values not
+    // explicitly written become `NULL`.
+    Write replace = 4;
+
+    // Delete rows from a table. Succeeds whether or not the named
+    // rows were present.
+    Delete delete = 5;
+  }
+}