@Override
  public boolean equals(Object o) {
    if (this == o) return true;
    if (o == null || getClass() != o.getClass()) return false;
    if (!super.equals(o)) return false;
    SchemaFetchMergeNode that = (SchemaFetchMergeNode) o;
    return Objects.equals(storageGroupList, that.storageGroupList);
  }
This class defines the scanned result merge task of schema fetcher.
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/queryengine/plan/planner/plan/node/metadata/read/SchemaFetchMergeNode.java