public void recordSpecifiedInfo(String key, String value) {
    if (specifiedInfo == null) {
      // explain analyze operator fetching and current operator updating may be concurrently
      specifiedInfo = new ConcurrentHashMap<>();
    }
    specifiedInfo.put(key, value);
  }
Contains information about {@link Operator} execution.

<p>Not thread-safe.
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/queryengine/execution/operator/OperatorContext.java