@Override
  public <R, C> R accept(PlanVisitor<R, C> visitor, C schemaRegion) {
    return visitor.visitAlterTimeSeries(this, schemaRegion);
  }
Used when the alterType is UPSERT.
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/queryengine/plan/planner/plan/node/metadata/write/AlterTimeSeriesNode.java