feat(spanner): Add ReadRowWithOptions method (#5240)

Co-authored-by: rahul2393 <rahulyadavsep92@gmail.com>

spanner/client_test.go

@@ -2860,6 +2860,21 @@ func TestClient_Single_Read_WithNumericKey(t *testing.T) {
 	}
 }
 
+func TestClient_Single_ReadRowWithOptions(t *testing.T) {
+	t.Parallel()
+
+	_, client, teardown := setupMockedTestServer(t)
+	defer teardown()
+	ctx := context.Background()
+	row, err := client.Single().ReadRowWithOptions(ctx, "Albums", Key{"foo"}, []string{"SingerId", "AlbumId", "AlbumTitle"}, &ReadOptions{RequestTag: "foo/bar"})
+	if err != nil {
+		t.Fatalf("Unexpected error for read row with options: %v", err)
+	}
+	if row == nil {
+		t.Fatal("ReadRowWithOptions did not return a row")
+	}
+}
+
 func TestClient_CloseWithUnresponsiveBackend(t *testing.T) {
 	t.Parallel()
 

spanner/transaction.go

@@ -212,7 +212,15 @@ func errMultipleRowsFound(table string, key Key, index string) error {
 // If no row is present with the given key, then ReadRow returns an error where
 // spanner.ErrCode(err) is codes.NotFound.
 func (t *txReadOnly) ReadRow(ctx context.Context, table string, key Key, columns []string) (*Row, error) {
-	iter := t.Read(ctx, table, key, columns)
+	return t.ReadRowWithOptions(ctx, table, key, columns, nil)
+}
+
+// ReadRowWithOptions reads a single row from the database. Pass a ReadOptions to modify the read operation.
+//
+// If no row is present with the given key, then ReadRowWithOptions returns an error where
+// spanner.ErrCode(err) is codes.NotFound.
+func (t *txReadOnly) ReadRowWithOptions(ctx context.Context, table string, key Key, columns []string, opts *ReadOptions) (*Row, error) {
+	iter := t.ReadWithOptions(ctx, table, key, columns, opts)
 	defer iter.Stop()
 	row, err := iter.Next()
 	switch err {