@Override
        public boolean equals(Object o) {
            if (this == o) {
                return true;
            }
            if (!(o instanceof DeleteColumn)) {
                return false;
            }
            DeleteColumn that = (DeleteColumn) o;
            return Arrays.equals(fieldNames, that.fieldNames);
        }
TableChange represent requested changes to a table.
inlong-sort/sort-common/src/main/java/org/apache/inlong/sort/schema/TableChange.java