@Override
  protected void serializeAttributes(ByteBuffer byteBuffer) {
    // ApplyNode should be transformed to other nodes after planning, so serialization is not
    // expected.
    throw new UnsupportedOperationException();
  }
HACK! Used for error reporting in case this ApplyNode is not supported
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/queryengine/plan/relational/planner/node/ApplyNode.java