public DataSet getUDFTable(GetFunctionTablePlan plan) {
    return new FunctionTableResp(
        new TSStatus(TSStatusCode.SUCCESS_STATUS.getStatusCode()),
        udfTable.getUDFInformationList(plan.getModel()));
  }
Validate whether the UDF can be dropped.
iotdb-core/confignode/src/main/java/org/apache/iotdb/confignode/persistence/UDFInfo.java