@Override
  public <R, C> R accept(PlanVisitor<R, C> visitor, C schemaRegion) {
    return visitor.visitCreateLogicalView(this, schemaRegion);
  }
This variable will be set in function splitByPartition() according to analysis. And it will be
set when creating new split nodes.
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/queryengine/plan/planner/plan/node/metadata/write/view/CreateLogicalViewNode.java