@Override
  public void setFetchSize(int fetchSize) {
    this.fetchSize = fetchSize;
    for (ISession session : queue) {
      session.setFetchSize(fetchSize);
    }
    for (ISession session : occupied.keySet()) {
      session.setFetchSize(fetchSize);
    }
  }
execute non query statement

@param sql non query statement
iotdb-client/session/src/main/java/org/apache/iotdb/session/pool/SessionPool.java