@Override
  public boolean needSetHighestPriority() {
    // if is this Statement is ShowQueryStatement, set its instances to the highest priority, so
    // that the sub-tasks of the ShowQueries instances could be executed first.
    return StatementType.SHOW_QUERIES.equals(statement.getType());
  }
Get all time partition ids and combine adjacent time partition if they belong to same data
region
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/queryengine/plan/analyze/Analysis.java