@Override
  public PlanNodeType getType() {
    return PlanNodeType.RELATIONAL_INSERT_ROW;
  }
Deserialize from wal.

@param stream - DataInputStream
@return RelationalInsertRowNode
@throws IOException - If an I/O error occurs.
@throws IllegalArgumentException - If meets illegal argument.
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/queryengine/plan/planner/plan/node/write/RelationalInsertRowNode.java