@Override
        public boolean equals(Object o) {
            if (this == o) {
                return true;
            }
            if (o == null || getClass() != o.getClass()) {
                return false;
            }
            AddColumn addColumn = (AddColumn) o;
            return isNullable == addColumn.isNullable
                    && Arrays.equals(fieldNames, addColumn.fieldNames)
                    && dataType.equals(addColumn.dataType)
                    && Objects.equals(comment, addColumn.comment)
                    && Objects.equals(position, addColumn.position);
        }
TableChange represent requested changes to a table.
inlong-sort/sort-common/src/main/java/org/apache/inlong/sort/schema/TableChange.java