@Override
  public SettableFuture<ConfigTaskResult> showCurrentSqlDialect(final String sqlDialect) {
    final SettableFuture<ConfigTaskResult> future = SettableFuture.create();
    ShowCurrentSqlDialectTask.buildTsBlock(sqlDialect, future);
    return future;
  }
FIXME Consolidate this clientManager with the upper one.
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/queryengine/plan/execution/config/executor/ClusterConfigTaskExecutor.java