/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.beam.sdk.extensions.sql.impl.rel;

import java.util.Objects;
import org.apache.beam.sdk.values.Row;

public class BeamCalcRelError {

  private Row row;
  private String error;

  public BeamCalcRelError(Row row, String error) {
    this.row = row;
    this.error = error == null ? "empty error msg" : error;
  }

  public Row getRow() {
    return row;
  }

  public void setRow(Row row) {
    this.row = row;
  }

  public String getError() {
    return error;
  }

  public void setError(String error) {
    this.error = error;
  }

  @Override
  public boolean equals(Object o) {
    if (this == o) {
      return true;
    }
    if (!(o instanceof BeamCalcRelError)) {
      return false;
    }
    BeamCalcRelError that = (BeamCalcRelError) o;
    return Objects.equals(getRow(), that.getRow()) && Objects.equals(getError(), that.getError());
  }

  @Override
  public int hashCode() {
    return Objects.hash(getRow(), getError());
  }
}

@@ -917,16 +917,76 @@
 ues.Row;
+%0Aimport org.checkerframework.checker.nullness.qual.Nullable;
 %0A%0Apublic
@@ -1450,16 +1450,26 @@
  equals(
+@Nullable 
 Object o

fix build