message: Fix testcase after merge
diff: @@ -15,17 +15,17 @@ int64_t sum = 0;
  int64_t count = 0;
  void Load(DuckDBBenchmarkState *state) override {
  state->conn.Query("CREATE TABLE integers(i INTEGER);");
  - Appender appender(state->db, DEFAULT_SCHEMA, "integers");
  + auto appender = state->conn.OpenAppender(DEFAULT_SCHEMA, "integers");
  // insert the elements into the database
  for (size_t i = 0; i < GROUP_ROW_COUNT; i++) {
  - appender.BeginRow();
  - appender.AppendInteger(i % GROUP_COUNT);
  - appender.EndRow();
  + appender->BeginRow();
  + appender->AppendInteger(i % GROUP_COUNT);
  + appender->EndRow();
  sum += i % GROUP_COUNT;
  count++;
  }
  - appender.Commit();
  + state->conn.CloseAppender();
  }
  void RunBenchmark(DuckDBBenchmarkState *state) override {
  @@ -53,19 +53,19 @@ int64_t sum = 0;
  int64_t count = 0;
  void Load(DuckDBBenchmarkState *state) override {
  state->conn.Query("CREATE TABLE integers(i INTEGER);");
  - Appender appender(state->db, DEFAULT_SCHEMA, "integers");
  + auto appender = state->conn.OpenAppender(DEFAULT_SCHEMA, "integers");
  // insert the elements into the database
  for (size_t i = 0; i < GROUP_ROW_COUNT; i++) {
  - appender.BeginRow();
  - appender.AppendInteger(i % GROUP_COUNT);
  - appender.EndRow();
  + appender->BeginRow();
  + appender->AppendInteger(i % GROUP_COUNT);
  + appender->EndRow();
  sum += i % GROUP_COUNT;
  if ((i % GROUP_COUNT) == 1) {
  count++;
  }
  }
  - appender.Commit();
  + state->conn.CloseAppender();
  }
  void RunBenchmark(DuckDBBenchmarkState *state) override {
  